puerto pizarro – punta bombon - imarpe.gob.pe · minutes and 70 water samples to depth of 10 m in...

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PERUVIAN SEA MARINE RESEARCH - IMARPE

Hydroacoustical Stock Assessment Pelagic Resource Cruise 0602-04

BIC JOSE OLAYA BALANDRA - BIC SNP-2 - L/P IMARPE VI - L/P IMARPE V

EXECUTIVE REPORT

Puerto Pizarro – Punta Bombon From February 21, 2006 to April 14, 2006

SUMMARY The environmental conditions have been very dynamic, to the north of 9°S was weakening of south-east tradewinds and towards the south of 13°S it was found waters relatively cold, due to the seasonal change and to winds strenghting. The coastal upwelling was very weak, extending until a maximum of 10nm of the coast. Below the 50m depth were located the Cold Coastal Water (CCW), which indicates that sea temperature anomalies are superficial. The “anchoveta” anchovy (Engraulis ringens) was the main specie in the coastal ecosystem, whereas "pota" giant squid (Dosidiscus Gigas) predominate in the oceanic environmental. The anchovy sizes structure reflected the presence of a recruiment quite below last years. The anomalous distribution of the juveniles is consequence of a very dynamic environmental. The total biomass of anchovy was 8,014,877 tons, with the greater abundances in 06° and 10ºS, towards the south of 13ºS the estimations were much smaller. The north-central stock was 7,6 millions tons and the south stock 0,4 millions tons only. Other species as “munida” Squat Lobster (Pleuroncodes monodon) and “vinciguerria” Panama Lighfish (Vinciguerria lucetia) registered abundances that was lower than other recent summers. The “munida” distribution was very coastal, associated to CCW. The “Jurel” Horse Mackerel (Trachurus murphyi) registered an important nucleus in the south zone associated with the sub-superficial water (SSW), whereas the presence of the “caballa” Jack Mackerel (Scomber japonicus) was not significant. The “bagre” Peruvian Sea Catfish (Galeichthys peruvianus), “camotillo” Camotillo (Normanichthys crockeri) and “samasa” Longnose Anchovy (Anchoa nasus) appeared in very small nucleus and near the coast.


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TRACKING and SAMPLING The present report describes the main results of Cruise 0602-04 carried out between Puerto Pizarro and Punta Bombon (North of Ilo port) since February 21, 2006 to April 14, 2006. As a total was covered 99 transects whose length average was of 90 nm. The extension of selected acoustic sampling was of 1nm, of which 8059 were tracked Sample Basic Unit (SBU) covering an area of approximately 90,000 nm2 (see the adjacent figure). It was executed in total 292 fish trawl catches that allowed to identify the registries of echotraces and to make biological samplings: the BIC Olaya carried out 83 fish trawl, BIC SNP-2 101 fish trawls, whereas the L/Ps Imarpe and Imarpe V has carried out alltogether 108 fish trawls in the coastal zone according to the programmed. For the analysis of the oceanographic environmental it was obtained 897 accumulated registries of sea surface temperature and 39 complete oceanographic stations, it have been analyzed 809 samples of salinity and 400 samples of dissolved oxygen; also 400 samples for analysis of nutrients and 345 for chlorophyll-a have been collected. Also was collected 121 zooplankton samples, using a Hensen net with opening of mesh of 300 microns, from a depth of 50m towards the surface in verticals hauls, 85 samples collected with Standard net of Phytoplankton of 75 microns, in superficial trawls at speed of three knots by five minutes and 70 water samples to depth of 10 m in the profiles Pizarro port, Paita, Punta Falsa, Chicama, San Juan and Atico, and for the profiles of Chimbote and Callao they were collected to depths of 0, 10, 25, 50 and 75 meters. In order to know the reproductive state of anchovy according to microscopic analysis, the samples were collected in random way and stratified by sizes. The ovaries were fixed with formaldehyl buffered, processed using the technique of freezing by means of the use of a portable and colored cryostate on board for their respective microscopic analysis. OCENOGRAPHY CONDITIONS Temperature (°C) Sea Surface Temperature oscillated between 14,4° and 28,3°C, showing the isotherm of 27°C (maximum temperatures) within the 50nm between Puerto Pizarro and Talara. The minimal temperatures (isothermal of 16° and 17°C) were located within the 7nm between Punta Chao and Punta Bermejo and to south of Atico.


82°W 80°W 78°W 76°W 74°W 72°W 70°W

83°W 81°W 79°W 77°W 75°W 73°W 71°W

18°S

17°S

16°S

15°S

14°S

13°S

12°S

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10°S

9°S

8°S

7°S

6°S

5°S

4°S

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17°S

16°S

15°S

14°S

13°S

12°S

11°S

10°S

9°S

8°S

7°S

6°S

5°S

4°S

Pto. PizarroZorritos

Pta. SalCabo Blanco Talara

PaitaPta. Gobernador

ParachiquePta. La Negra

MórropePimentel

ChérrepePacasmayo

ChicamaTrujillo

Salaverry

Punta ChaoChimbote

CasmaPunta LobosHuarmey

Punta BermejoSupe

Huacho

Chancay

Callao

Pucusana

Cerro Azul

Tambo de MoraPisco

Bahía IndependenciaPunta Infiernillos

Punta Caballas

San Juan

Chala

AticoOcoña

QuilcaMollendo

Pta. Bombom

IloSama

TRAYECTOS Y LANCES REALIZADOS

Leyenda

Trayectos Olaya

Trayectos SNP-2

Calas Olaya

Calas SNP-2

Calas Imarpe V

Calas Imarpe VI

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84° W83° W82° W81° W80° W79° W78° W77° W76° W75° W74° W73° W72° W71° W70° W


18° S

17° S

16° S

15° S

14° S

13° S

12° S

11° S

10° S

9° S

8° S

7° S

6° S

5° S

4° S

3° S

18° S

17° S

16° S

15° S

14° S

13° S

12° S

11° S

10° S

9° S

8° S

7° S

6° S

5° S

4° S

3° S Pto. Pizarro

Pta. Sal

Talara PaitaPta. Gobernador

Pta. La Negra

MórropePimentel

ChérrepeChicama

SalaverryPunta Chao

ChimboteCasma

Punta LobosHuarmey

Punta BermejoSupeHuacho

ChancayCallao

PucusanaCerro Azul

Tambo de MoraPisco


Punta CaballasSan Juan

ChalaAtico

OcoñaQuilca

Mollendo

Ilo

Crucero Pelágico 0602-04

Temperatura (°C)

To the north of 6°S higher values of normal average were registered, caused mainly by the weakening of SE tradewinds during February and the fortnight of March, which could be the possible cause of the relax of coastal upwelling in all the North zone and a greater projection towards the south within the 80 nm of tropical and equatorial waters (greater temperatures to 24°C). To the south of 13°S (excluding 15° and 16°S degrees) thermal values below the normal average have been registered, which has been influenced by the subsuperficial presence of the Subantartica Temperated Water (STW).

Thermal Anomalies (°C) The thermal anomalies showed values that oscillated between +4.3 and –2,5°C. Positive anomalies predominated to north of 6°S and south of 15°S (by outside the 50nm), appearing the maximum anomalies (greater to 3,0°C) between Punta Sal and Punta Gobernador related to the Superficial Equatorial Waters (SEW); also off the 70nm at south of San Juan, related to the presence of the Superficial Subtropical Waters (SSW). Between the 9° and 14°S predominated the negative anomalies, reaching their maximum value (smaller to -2,0°C) by outside the 40nm in front of Cerro Azul. Smaller anomalies of -1,0° C were found between Pucusana and Tambo de Mora.

Salinity (Salinity Practical Unit – SPU). The marine environmental had been very dynamic due mainly to the variation of this salinity. The Superficial Tropical Waters (STW) (less than 34,0 SPU) showed a projection inside the 40nm until the south of Talara; the Superficial Equatorial Waters (SEW) (less than 34,8 SPU) covered the area to north of 7°S; between the 6-8°S small zones of mixture with the Superficial Subtropical Waters (SSW) and the Cold Coastal Waters (CCW) were found; the Superficial Subtropical Waters (SSW) (greater than 35,1 SPU) showing by outside the 40nm between the 8 and 11°S and by outside the 70nm to the south of Punta Infiernillos.




18° S

17° S

16° S

15° S

14° S

13° S

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3° S Pto. Pizarro

Pta. Sal


Pta. La Negra

MórropePimentel

ChérrepeChicama

SalaverryPunta Chao

ChimboteCasma

Punta LobosHuarmey


ChancayCallao

PucusanaCerro Azul

Tambo de MoraPisco



ChalaAtico

OcoñaQuilca

Mollendo

Ilo


Salinidad (ups)



18° S

17° S

16° S

15° S

14° S

13° S

12° S

11° S

10° S

9° S

8° S

7° S

6° S

5° S

4° S

3° S

18° S

17° S

16° S

15° S

14° S

13° S

12° S

11° S

10° S

9° S

8° S

7° S

6° S

5° S

4° S

3° S Pto. Pizarro

Pta. Sal


Pta. La Negra

MórropePimentel

ChérrepeChicama

SalaverryPunta Chao

ChimboteCasma

Punta LobosHuarmey


ChancayCallao

PucusanaCerro Azul

Tambo de MoraPisco



ChalaAtico

OcoñaQuilca

Mollendo

Ilo


Anomalías Térmicas (°C)

-2

4

4

The coastal region to north of 9°S presented typical values of mixture between the SSW, CCW, SEW and the continental waters discharges (less than 34,8 SPU). To the south of this latitude was observed upwelling zones within the 10nm, being located the main zones between Punta Bermejo - Chancay, Bahía Independencia - San Juan and from Atico - Mollendo. The Subantartical Temperated Waters (STW) (salinities between 34,6 and 34,8 SPU) have appeared in the superficial layer to south of 16°S, mixing with SSW and CCW, appearing like own values of the CCW or minors to these.

Disolved Oxígen (milliliters by Liters ml/L)



18° S

17° S

16° S

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3° S

18° S

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15° S

14° S

13° S

12° S

11° S

10° S

9° S

8° S

7° S

6° S

5° S

4° S

3° S Pto. Pizarro

Pta. Sal

Talara Paita

Pta. Gobernador

Pta. La Negra

MórropePimentel

ChérrepeChicama

SalaverryPunta Chao

ChimboteCasma

Punta LobosHuarmey


ChancayCallao

PucusanaCerro Azul

Tambo de MoraPisco



ChalaAtico

OcoñaQuilca

Mollendo

Ilo


Oxígeno Disuelto (ml/L)

Values unusually elevated of dissolved oxygen (up to 11 ml/L) were registered between Pimentel and Salaverry, as a result of the null coastal upwelling in the area and of the convergence of masses of water of different characteristics (SSW, SEW, CCW and continental discharges) what originated an ample zone of red tide. The strong discharge from the rivers to the south of 12°S also has influenced in the formation of mixtures in the coastal zone, elevating the oxygen tenor and decreasing salinity, as it is observed between Callao and Cerro Azul. Smaller values of 4 ml/l related directly to coastal upwelling do not extend beyond the 10nm from coast, being observed mainly between Punta Chao - Chancay and between Pisco - Mollendo associated to smaller temperatures 18°C.

Winds (m/s) The south tradewinds have presented intensities between 0,3 and 11,5 m/s, with predominant direction of South-East (SE), except at north of 5°S that presented variable directions by the little intensity of winds. In general, to the north of 10°S the winds have been between weak (smaller to 4 m/s) and moderate (from 4 to 7,5 m/s), influencing in the temperature increase in the sea surface, weakening of the coastal upwelling as well as the projection towards the south of the Superficial Equatorial Waters (SEW).



18° S

17° S

16° S

15° S

14° S

13° S

12° S

11

4°

To the south of 12°S, the winds increased their intensity (greater to 7,5 m/s) mainly between San Juan and Atico favoring partly to areas of coastal upwelling and the projection towards west of waters relatively cold, also as the dispersion and mixes of the Subantartical Temperated Waters (STW).


° S

10° S

9° S

8° S

7° S

6° S

5° S

S

3° S

18° S

17° S

16° S

15° S

14° S

13° S

12° S

11° S

10° S

9° S

8° S

7° S

6° S

5° S

4° S

3° S Pto. Pizarro

Pta. Sal

Talara Paita

Pta. Gobernador

Pta. La Negra

MórropePimentel

ChérrepeChicama

SalaverryPunta Chao

ChimboteCasma

Punta LobosHuarmey


ChancayCallao

PucusanaCerro Azul

Tambo de MoraPisco



ChalaAtico

OcoñaQuilca

Mollendo

Ilo

Crucero Pelagico 0602-04

Vientos (m/s)

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

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Topography of 15°C Isotherm (m) The 15ºC isotherm depth varied between 8 to 79m, being located greater depths to 80nm of Salaverry and Atico and minors depth within the 20nm at Punta Chao and Callao. The topography of 15°C isotherm presented flows towards the north, of weak intensity to north of 8°S and of moderate intensity to south of 10°S, presenting by outside the 80nm in front of Salaverry and Atico some verticals displacements due to the influence of west flows.

Puerto Pizarro Section This section presented temperatures between 7,2° and 28,3°C, associated to salinities between 30,22 to 35,03 SPU, showing a very fortified termocline with 13 isotherms under the 70m of depth (very similar to cruise 0601-02). The Superficial Tropical Waters (STW) have been located within the 45nm of the coast and up to 25m of depth, whereas the Superficial Ecuatorial Waters (SEW) (less than 34,8 SPU) extended up to 80nm, with a thickness of 40m near the coast, which decrement slightly towards the west. The Cold Coastal Waters (CCW) had presented below 50m, with light flow towards the south within the 20nm of coast, which has allowed to a greater presence of these waters and a permanence of the iso-oxygen of 1 ml/L with respect to the cruise 0601-02. The minimal of oxygen (0,5 ml/L) bases of the Cromwell Current South Extention (CCSE), was below the 200m depth to 80nm of the coast, deepening in its approach to the coast, associated to the isotherm of 13°C. Paita Section The Paita section superficial layer have been slightly covered with Superficial Tropical Waters (STW) above the 10m of depth and until the 10nm, Superficial Equatorial Waters (SEW) with a thickness between 20 and 25m were below the STW and until the 80nm, presenting temperatures between 19° and 26°C and salinities from 34,0 to 34,8 SPU. This thickness stays on its depth in relation to the observed during the Cruise 0601-02.




18° S

17° S

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3° S

18° S

17° S

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15° S

14° S

13° S

12° S

11° S

10° S

9° S

8° S

7° S

6° S

5° S

4° S

3° S Pto. Pizarro

Pta. Sal


Pta. La Negra

MórropePimentel

ChérrepeChicama

SalaverryPunta Chao

ChimboteCasma

Punta LobosHuarmey


ChancayCallao

PucusanaCerro Azul

Tambo de MoraPisco



ChalaAtico

OcoñaQuilca

Mollendo

Ilo

Crucero Pelagico 0602-04

Topografía de la Isoterma de 15°C (m)

80 60 40 20 0Distancia de Costa (mn)

Temperatura (°C)

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(m)


Salinidad (ups)

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(m)


Oxígeno Disuelto (ml/l)

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Sección Puerto Pizarro (25/02/06)


Temperatura (°C)

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Sección Paita (28/02/06)

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The Cold Coastal Waters (CCW) were located below the 35m, presenting subsuperficial flows towards the south, which is reflected in the deepening of 14°C isotherms in its approach to the coast; the slight deepening of iso-oxygens of 3 and 2 ml/L within the 25nm; as well as the presence of a superficial minimal of oxygen below the 200m. The Cromwell Current South Extention presented slight fortification in this section with respect to cruise 0601-02, as demonstrates the deepening up to 200m of the minimal of oxygen within the 30nm, the same that was located at beginnings of February above the 100m depth. Punta Falsa Section appeared enough similar to Paita section except that were not observed the Superficial Tropical Waters (STW). Chicama Section Superficial Subtropical Waters (SSW) appeared above 50m of depth and by outside 50nm off coast, very related with temperatures of 18°C. The vertical structure showed a termocline above 60m depth with 9 isotherms (15°-24°C). These characteristics of temperature and salinity stayed equal in relation to the observed thing during the Cruise 0601-02. Cold Coastal Waters (CCW) were located below 50m, presenting subsuperficial flows towards the south below 150m depth within the 10nm, which is reflected in the deepening of 14°C isotherms of in its approach to the coast and another flow slightly towards the north above 40m very close to the coast showing a slight elevation to the 15°C isotherm. The values of oxygen oscillated between 0,70 and 11,59 ml/L. The minimal of oxygen was found below 100m rising until 50m in its approach to the coast


Temperatura (°C)

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25P

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rofu

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Sección Chicama (08/03/06)

The Chimbote section was very similar to Chicama section except were not found the elevated tenors of oxygen. Callao Section The vertical structure showed a termocline above 60m depth with 7 isotherms (15° - 22°C). Waters of mixture (SSW and CCW) were located above 80m depth. The CCW were located below 80m, presenting subsuperficial flows towards the south below the 100m depth within the 10nm. The values of oxygen oscillated between 0,50 and 6,0 ml/L. The minimal of oxygen was found above 80m rising until 20m in its approach to the coast.


Temperatura (°C)

500

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(m)

San Juan and Atico Sections In these sections the level and thickness of the Subantartic temperated Waters (STW) were observed. The presence of these sub-superficial waters above 90m depth has been the main cause of the great mixtures and the low salinity (34,7 – 34,9 SPU) registered in the coastal region to the south of 15°S, also of retired and mixes of the Superficial Subtropical Waters (SSW). The greater thickness of Subantartic Temperated Waters (STW) is observed in front of San Juan between the 35 and 80m depth and by outside the 25nm.



Salinidad (ups)

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Sección Callao (30-31/03/06)

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Temperatura (°C)

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Prof

undi

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(m)


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Sección San Juan (04-05/04/06)

60 40 20 0Distancia de Costa (mn)

Temperatura (°C)

500

450

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(m)


Salinidad (ups)

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(m)



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(m)

Sección Atico (07/04/06)

Ichthyoplankton Collected samples preliminary analysis showed presence of anchovy egg in the zone between Paita and Chimbote from 5 to 20nm off coast. Between Chimbote and Callao the greater egg distribution was located until a maximum distance of 50nm off coast, whereas in the south zone were observed between Tambo Mora y Punta Caballas with egg concentrations until 20nm off coast, then located at 30nm off coast front to Chala and to 5nm between the ports of Ocoña and Quilca. Also, larvae of this species were observed by the north zone located in two areas between Paita and Punta La Negra at 5 and 50nm, whereas between Pimentel and Callao were located the greater concentration between 5 and 70nm off coast, by the south zone were observed between Punta and Quilca mainly within the 5nm.



18° S

17° S

16° S

15° S

14° S

13° S

12° S

11° S

BIOLOGICAL and FISHERIES ASPECTS Composition by species in the catches It was executed 292 fish trawl of verification, obtained a total catch of 35,149.5 kg. The higher volumes of capture correspond to the anchovy, “munida” Squat Lobster (Pleuroncodes monodon) and “pota” giant squid (Dosidicus gigas), respectively. The composition by species was the following one:


10° S

9° S

8° S

7° S

6° S

5° S

4° S

3° S

18° S

17° S

16° S

15° S

14° S

13° S

12° S

11° S

10° S

9° S

8° S

7° S

6° S

5° S

4° S

3° S Pto. Pizarro

Pta. Sal


Pta. La Negra

MórropePimentel

ChérrepeChicama

SalaverryPunta Chao

ChimboteCasma

Punta LobosHuarmey


ChancayCallao

PucusanaCerro Azul

Tambo de MoraPisco



ChalaAtico

OcoñaQuilca

Mollendo

Ilo

Crucero Pelagico 0602-04Presencia de Huevos y larvas de Anchoveta

LARVAS

HUEVOS

Est. HENSEN Olaya

Est. HENSEN SNP-2

BIC OLAYA SNP-2 IMARPE VI-V Total %LANCES 83 101 108 292Anchoveta 19269.0 1718.2 2359.1 23346.4 66.42Jurel 221.7 2.5 0.4 224.6 0.64Caballa 8.6 0.4 0.2 9.1 0.03Camotillo 8.6 47.8 144.9 201.2 0.57Merluza 0.2 0.2 0.00Bagre 451.1 107.3 236.7 795.0 2.26Samasa 96.6 0.0 294.7 391.3 1.11Vinciguerria 5.5 0.1 5.6 0.02Mictofidos 18.1 2.5 20.6 0.06Pota 1834.3 1414.7 3249.0 9.24Munida 2424.3 1171.2 2208.0 5803.5 16.51Otros 83.0 330.0 690.0 1102.9 3.14

24421.0 4794.6 5934.1 35149.5 100.00

8

Other catches species were “falso volador” Lumptail Searobin (Prionotus stephanophrys), “lorna” (Sciaena deliciosa), “chilindrina” (Stromateus stellatus), “pez medusa” (Psenes sio), “pez errante” (Cubiceps sp), “cachema” (Cynoscion analis), “calamar” (Loligo gahi), other cephalopodus, and yellow fish, etc. "pota" giant squid (Dosidicus gigas) was present in most of the catches to north of Callao port, sometimes linked with the distribution of anchovy. In spite of the high catches of “munida” Squat Lobster (Pleuroncodes monodon), this species was not as frequent as in other occasions. Also, the distribution and abundance of “vinciguerria” Panama Lightfish (Vinciguerria lucetia) were smaller to usually registered during the summer cruises. STRUCTURES by SIZES Anchovy The anchovy sizes registered in catches were from 3,0 through 17,5 cm of length, with a differents modals lenghts, both in juveniles like adults individuals. In the north-central region global structure of population distinguished modals of 6,5 and 14,5 cm, with a juveniles percentage of 55,6 % in individuals number; whereas in the south region modals were registered in 5,5 and 13,5 cm accumulated by 74,6 % of juveniles.

The distribution of the individuals according to sizes shows an unusual distribution pattern for the summer season due to the high dynamics in the marine environmental.

3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20Long.(cm)

% N

umer

o

% P

eso

In other words the sizes structures and latitude degrees, are observed two areas with high presence of juveniles, between the degrees 6º and 9ºS as well as between the degrees 13º and 16ºS.


Norte-Centro

Sur

Biomasa : 7 613 423 t% Juv, en peso: 17,5 %% Juv, en Nº: 55,6

Biomasa : 401 453 t% Juv, en peso: 27,0 %% Juv, en Nº: 74,6

3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20Long.(cm)

%

05ºS06ºS07ºS

08ºS

09ºS

8.2 %

87.4 % juv 29.2 % juv

47.1 %

5.4 % j

581 665

1 504 808

671 098

751 888

863 478

10ºS

11ºS

12ºS

13ºS

6.4 % juv

22.5 %

35.7% juv

52.3 %

1 015 545

779 063

778 109

322 713

0 % juv. 04ºS 680

14ºS67.7 % 294 376

15ºS

16ºS

85.5 % juv 230 491 t

44.0 % juv 77 774 t

17ºS0.9 % juv 93 188 t

9

Between the adults stock is easy to see the modal of 14,5cm, although towards the south has been a modal of 13,5cm.

The anchovy was distributed until the 60nm off shore, being the greater incidence of juveniles into the 30nm.

3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Long.(cm)

%

10 mn

20 mn

30 mn

40 mn

50 mn

52 % Juv

70 % Juv

53 % Juv

26 % Juv

21 % Juv

2 720 831 t

2 506 285 t

1 437 548 t

1 009 953 t

332 225 t

8034 t31 % Juv 60 mn

In the present summer, the anchovy recruitment was lower than previous years. Both in abundance as in scope of evaluated area. In other words It means that in the total 7,6 million tons calculated in this stock, 6,1 million tons are bigger than 12 cm. In the South Region, from San

Jurel” Horse Mackerel (Trachurus

rachurus murphyi was capturated in isolated

Pota” Giant Squid (Dosidicus gigas)

osidicus gigas was captured very frequently at

Latitud Juv Adultos4 0 6805 17052 564613 Dist.Costa Juv Adultos6 692006 812801 10 467284 22535477 38131 632966 20 581708 19245778 59746 692142 30 297286 11402629 16634 846844 40 67172 942781

10 26696 988849 50 27698 30452711 87095 691968 60 1234 680012 171632 60647713 81758 290956 Total 1442382 657249414 143229 15114615 89865 14062616 18061 5971317 476 92712

Juan to Matarani, the calculated biomass was 400 thousand tons, being 290 thousand that correspond to the adult stock. Total 1442382 6572494

BIOMASAS (t) CR.0511-12 BICs OLAYA - IMARPE VI Y VBIOMASAS (t) Cr.0602-04 BICs OLAYA – IMARPE VI y V

Latitud Juv Adultos4 0 6805 17052 564613 Dist.Costa Juv Adultos6 692006 812801 10 467284 22535477 38131 632966 20 581708 19245778 59746 692142 30 297286 11402629 16634 846844 40 67172 942781

10 26696 988849 50 27698 30452711 87095 691968 60 1234 680012 171632 60647713 81758 290956 Total 1442382 657249414 143229 15114615 89865 14062616 18061 5971317 476 92712

tal 1442382 6572494

BIOMASAS (t) CR.0511-12 BICs OLAYA - IMARPE VI Y V

To

0

2

4

6

8

10

12

14

16

3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39Long.(cm)

%

“murphyi) Tfish trawl between Paita and Atico. The sizes range from 4 to 39cm in total length, showing modals sizes in 5 and 8cm in juveniles individuals and 29, 25 and 31cm adult stock. Spatially the very small fishes were located in north (5ºS) and those of greater size were located in front of Atico.

“ Dnorth of Callao port, where the conditions of the environmental favored the greater disponibility of this resource. Their sizes ranged from 2 to 93cm in mantle length. The more representative modal length is located in 17cm, also being located modals in the greatest sizes.


BIOMASAS (t) Cr.0602-04 BICs OLAYA – IMARPE VI y V

0

5

10

15

20

25

30

35

2 8 14 20 26 32 38 44 50 56 62 68 74 80 86 92 98Long.Manto (cm)

%

N = 1020L.M = 23,12 cm

40

0

5

10

15

20

25

30

35

2 8 14 20 26 32 38 44 50 56 62 68 74 80 86 92 98Long.Manto (cm)

%

N = 1020L.M = 23,12 cm

40

10

“Munida” Squat Lobster (Pleuroncodes monodon) Catches were made from 8° to 17°S, the best catches were made at 11°S. By distance of the coast the catches were located within the 30nm. The total sizes ranged between 3 to 22mm in cephalotorax length, with average size in 13,92 mm and bi-modals structure.

Gonadal maturity of anchovy. Microscopic observing In general, the results about the ovacitary development in all explored areas (from 5° to 16°S) weighed to the size structure, show two zones with different maturity states. From 5° to 9°S it shows a mature and spawning ovacitary structure, with a value of spawning fraction (FPO + OH) of 20,6% slightly greater to critical value that is an indicator of important periods of spawning, whereas from 10° to 16°S registry one opposite ovacitary structures, showing the inactive individuals (with OI and OPV). The spawning fraction in all this zone reach 2,5% only. By latitudinal degrees The spawning fraction (microscopically) by latitudinal degrees weighed to catches as well as the gonadosomatic index (GI), showed for all the areas values of FD below the critical value (20%) except in 8° and 9°S. Also this critical value is single for FD. In the case of GI, this show the same tendency registering their maximum values in 8° and 9°S. In general, both register the same behaviour.


0

2

4

6

8

10

12

14

5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

Long.Cefalotórax (mm)

%

0.0

5.0

10.0

15.0

20.0

25.0

30.0

35.0

40.0

5º

Frac

ion

deso

vant

e %

0

20

40

60

80

OI OPV OV OM OH FPO OA

Tipos de ovocitos

Frec

uenc

ia re

lativ

a (%

)

del 5º al 9º S del 10º al 16º S

Valor critico
O.I. Ovary with ovocitos inmaduros O.P.V. Ovary with ovocitos pre-vitelogenadosO.V. Ovary with ovocitos vitelogenados O.M. Ovary with ovocitos maduros O.H. Ovary with ovocitos hidratados F.P.O. Ovary with folículos post-ovulatorios O.A. Ovary with ovocitos atrésicos
4

6º 7º 8º 9º 10º 11º 12º 13º 14º 15º 16ºgrados latitudinales

0

1

2

3

4

5

6

IGS

FDIGS

Valor

11

Macrocospic readings In all the prospected area and according to the state of maturity found by latitudinal degrees the individuals were grouped in two differents groups: from 5° to 9° S (explored area between February ends and first fortnight of March) , where it found spawning individuals (stage V) with values above 50%; whereas from 10° to 16°S (explored area between the second week of March and first week of April) state of maturity found was very low, showing the individuals in stage II which was 42.4% followed by stage VI (recovered) with 25,4%.

RESOURCES DISTRIBUTION

“Anchoveta” Anchovy (Engraulis ringens) Anchovy distribution was from Talara in the north to Punta Bombon in the south, mainly was located very near the coast, just between the zone of Casma to Supe and Chancay, its distribution reached to 70nm off shore. The main areas of high distribution were located from Punta Falsa to Pisco (north-central zone). This distribution was characterized by the influence of Superficial Tropical Waters (STW) in the North zone until Sechura and the approach to the coast of Subantartical Temperated Waters (STW) and Superficial Subtropical Waters (SSW) in the South zone from San Juan to Mollendo. Vertically this species was located

Other Species

Vinciguerria” Panama Lightfish (Vinciguerria lucetia) showed an spread distribution from Punta

83°W 81°W 79°W 77°W 75°W 73°W 71°W

83°W 81°W 79°W 77°W 75°W 73°W 71°W

18°S

17°S

16°S

15°S

14°S

13°

between the range of 2 to 60 meters, and with greater located between 2 and 30 meters.

“Sal to Matarani, in different areas of the study zone, with exception between Pacasmayo and Casma where this distribution dissapeared. It located very near the coastal region in the South zone from 5nm to 90nm in front of Punta Falsa. The main distribution areas were located between Callao and Cerro Azul from 30 to 90nm off shore coast.


S

12°S

11°S

10°S

9°S

8°S

7°S

6°S

5°S

4°S

18°S

17°S

16°S

15°S

14°S

13°S

12°S

11°S

10°S

9°S

8°S

7°S

6°S

5°S

4°S





MórropePimentel

ChérrepePacasmayo

ChicamaTrujillo

Salaverry

Punta ChaoChimbote


Punta BermejoSupe

Huacho

Chancay

Callao

Pucusana

Cerro Azul

Tambo de MoraPisco


Punta Caballas

San Juan

Chala

AticoOcoña

QuilcaMollendo

Pta. Bombom

IloSama

Distribución de la anchoveta

1

5

10

50

100

250

500

750

1000

Val

ores

eco

inte

grad

os (

m²/m

n²)

0.0

10.0

20.0

30.0

40.0

50.0

60.0

II III IV V VI

estadios de madurez gonadal

Frec

uenc

ia re

lativ

a (%

)

5º al 9º S10º al 16º S

12

Pota” Giant squid (Dosidicus gigas) had a very similar distribution to vinciguerria, from Cabo

Múnida” Squat Lobster (Pleuroncodes monodon) showed a distribution from Chicama to

Bagre” Peruvian Sea Catfish (Galeichthys peruvianus) was detected from Punta La Negra to

Camotillo” Camotillo (Normanichthys crockery) just was detected very near the coast between

Samasa” Longnose Anchovy (Anchoa nasus) just appeared in small very dispersed nucleus

“Blanco to Matarani, just between Chicama and Huarmey with not presence of this specie, in the South zone "pota" was located very near the coast (from 1nm), whereas in the north-center zone its distribution begins from 20 to 90nm. The main areas of abundance were located in front of Punta La Negra, Pimentel and Punta Caballas. This resource was located mainly in the mixture zone of Cold Coastal Waters (CCW) and Superficial Subtropical Waters (SSW). “Mollendo very near the coast of 1 to 50nm front of Huacho, where the main distribution area is observed. This resource is characterized to be present in Cold Coastal Waters (CCW). In general, this specie shares the same area of distribution that anchovy, but vertically is located below 15 meters of depth “Tambo de Mora in very dispersed and coastal form, the areas of greater concentration were located between Pimentel and Pacasmayo from 2 to 15nm of distance to coast. “Pisco and San Juan, in very dispersed form, this specie appears associated to cold waters characteristic of CCW. “between Punta La Negra and Salaverry in the North zone, whereas in the south was detected in front Cerro Azul and Tambo Mora, in both cases near the coast (from 1 to 5nm).


18°S

17°S

16°S

15°S

14°S

13°S

12°S

11°S

10°S

9°S

8°S

7°S

6°S

5°S

4°S

18°S

17°S

16°S

15°S

14°S

13°S

12°S

11°S

10°S

9°S

8°S

7°S

6°S

5°S

4°S





MórropePimentel

ChérrepePacasmayo

ChicamaTrujillo

Salaverry

Punta ChaoChimbote


Punta BermejoSupe

Huacho

Chancay

Callao

Pucusana

Cerro Azul

Tambo de MoraPisco


Punta Caballas

San Juan

Chala

AticoOcoña

QuilcaMollendo

Pta. Bombom

IloSama

Vinciguerria

1

5

10

50

100

250

500

750

1000

Val

ores

eco

inte

grad

os (

m²/m

n²)

Pota

13

“Jurel” Horse Makerel (Trachurus murphyi) distribution was very dispersed in small nucleus from Punta Falsa to Matarani, the main distribution area was located in front of Chala and Atico from 20 to 60nm of distance to the coast, other small nucleus were located in front of Salaverry and Huarmey to 50nm. In water column the schools of this specie were located between 10 to 20 meters of depth, mainly associated to Superficial Subtropical Waters (SSW). “Caballa” Jack Makerel (Scomber japonicus) showed a very small nucleus distribution in front of Salaverry, Chicama, Huarmey y Atico, between 25 and 50nm. In general, sharing the same areas like “jurel”.


18°S

17°S

16°S

15°S

14°S

13°S

12°S

11°S

10°S

9°S

8°S

7°S

6°S

5°S

4°S

18°S

17°S

16°S

15°S

14°S

13°S

12°S

11°S

10°S

9°S

8°S

7°S

6°S

5°S

4°S





MórropePimentel

ChérrepePacasmayo

ChicamaTrujillo

Salaverry

Punta ChaoChimbote


Punta BermejoSupe

Huacho

Chancay

Callao

Pucusana

Cerro Azul

Tambo de MoraPisco


Punta Caballas

San Juan

Chala

AticoOcoña

QuilcaMollendo

Pta. Bombom

IloSama

Bagre

1

5

10

50

100

250

500

750

1000

Val

ores

eco

inte

grad

os (

m²/m

n²)

Munida

Samasa

18°S

17°S

16°S

15°S

14°S

13°S

12°S

11°S

10°S

9°S

8°S

7°S

6°S

5°S

4°S

18°S

17°S

16°S

15°S

14°S

13°S

12°S

11°S

10°S

9°S

8°S

7°S

6°S

5°S

4°S





MórropePimentel

ChérrepePacasmayo

ChicamaTrujillo

Salaverry

Punta ChaoChimbote


Punta BermejoSupe

Huacho

Chancay

Callao

Pucusana

Cerro Azul

Tambo de MoraPisco


Punta Caballas

San Juan

Chala

AticoOcoña

QuilcaMollendo

Pta. Bombom

IloSama

Jurel

1

5

10

50

100

250

500

750

1000

Val

ores

eco

inte

grad

os (

m²/m

n²)

Caballa

14

BIOMASS CALCULATED OF PELAGIC FISH Anchovy total biomass was 8,014,877 metrical tons, with the greater abundances between 06° and 10ºS. To the south of 13ºS the estimations were very smaller.

Biomasa latitudinal y por distancia a la costa de la anchoveta. Crucero 0602-04TOTALES TOTAL Grado de

(t) (%) 70-80 60-70 50-60 40-50 30-40 20-30 10-20 0-10 latitud sur 03

° 30 - 04° 00

03°30' - 04°

680 0.01 680 04° - 05°

581 665 7.26 91 642 490 023 05° - 06°

1 110 732 28 105 179 366 826 546 76 714 30 - 07° 001 504 808 18.78 28 105 179 366 856 385 440 951 06° - 07°

664 537 8.29 609 83 579 152 116 206 918 221 315 07° - 08°

751 888 9.38 60 120 277 567 638 63 914 08° - 09°

460 128 276 677 98 663 34 742 50 046 30 - 10° 00 807 760 10.08 276 677 151 225 128 694 251 164 09° - 10°

1 015 545 12.67 258 093 341 320 70 358 32 389 313 385 10° - 11°

857 636 10.70 3 546 68 508 23 276 463 764 62 279 236 262 11° - 12°

282 491 4 488 3 633 197 092 30 101 47 177 30 - 13° 00 778 109 9.71 4 488 4 932 253 631 231 589 143 174 140 294 12° - 13°

356 419 4.45 2 890 62 778 130 606 160 146 13° -14°

294 376 3.67 60 406 233 970 14° -15°

135 293 23 474 2 545 104 075 28 175 30 - 16° 00 230 492 2.88 23 474 6 075 174 261 49 658 15° -16°

77 773 0.97 51 893 25 880 16° -17°

93 188 1.16 93 188 17° -18° 18° 00 - 18° 30 0.00 18° -18°30'


04° 00 - 04° 30

680 680 04° 30 - 05° 00

102 273 102 273 05° 00 - 05° 30 479 393 91 642 387 751 05° 30 - 06° 00

394 076 29 839 364 237 06° 00 - 06° 3006°

309 415 81 079 133 025 21 449 73 862 07° 00 - 07° 30 355 122 609 2 500 19 091 185 470 147 453 07° 30 - 08° 00

249 756 60 118 144 108 686 22 866 08° 00 - 08° 30 502 132 2 132 458 952 41 048 08° 30 - 09° 00

347 633 52 562 93 952 201 118 09° 00 - 09° 3009°

390 609 176 765 130 654 18 289 17 095 47 805 10° 00 - 10° 30 624 937 81 328 210 666 52 069 15 294 265 580 10° 30 - 11° 00

289 679 41 366 6 983 61 195 6 561 173 575 11° 00 - 11° 30 567 957 3 546 27 142 16 294 402 570 55 718 62 688 11° 30 - 12° 00

495 618 4 932 249 998 34 498 113 073 93 117 12° 00 - 12° 3012°

174 392 2 890 62 073 14 335 95 095 13° 00 - 13° 30 182 028 705 116 271 65 051 13° 30 - 14° 00

207 335 45 877 161 458 14° 00 - 14° 30 87 041 14 529 72 512 14° 30 - 15° 00

95 198 3 530 70 186 21 483 15° 00 - 15° 3015°

58 231 46 639 11 592 16° 00 - 16° 30 19 542 5 254 14 289 16° 30 - 17° 00

93 188 93188 17° 00 - 17° 30 17° 30 - 18° 00

TOTALES 8 034 332 224 1 009 953 1 437 549 2 506 285 2 720 831 8 014 877100.00 0.10 4.15 12.60 17.94 31.27 33.95

Distancia a la costa (mn)

Grado de latitud Jurel Caballa Múnida Bagre Vinciguerria Pota

03 0 0 0 0 004 0 0 0 0 106772 2397105 73914 0 0 0 152683 829906 2861 0 0 40436 100316 9038307 3213 0 0 71968 85015 14032508 76120 28822 92959 53938 0 4309 0 15720 52215 47813 34719 010 0 56209 119045 7783 38214 1023511 141042 0 214161 6072 67431 535612 8234 0 88636 3720 362412 2258613 18015 0 122476 4902 607853 4292014 0 0 215678 0 235420 9572015 374 0 48995 0 17076 35051916 528171 99 119058 0 17805 4173117 27321 0 7322 0 114841 12432

TOTAL 879266 100850 1080545 236632 1940557 844520

Biomasas (toneladas) de especies evaluadas en el crucero 0602-04

Especies

0

15

BIRDS SIGHTING A total of 23,931 marine birds was registered, grouped in 42 species, for 1,549 miles of observation. Birds in 320 miles of route were not observed (20,66%). An average to 15,45 birds by crossed mile was registered in addition (SD = 36,52, rank 0 – 505, n=1549). The average of species by mile was 2,04 (SD = 1.78, rank = 0-9, n=1549). The most abundant species was the Peruvian "piquero" (Sula variegata, n = 5620, 23,5%), followed of "camanay" (Sula nebouxii n = 5045, 21.1%), the group of storm wanderers (Fam. Hydrobatidae, n = 3523, 13.6%) and the Peruvian "pelicano" (Pelecanus thagus 1341 individuals, 5.6%). The deposit sea birds species ("guanay", "piquero", "camanay" and "pelicano") added 54.9% of registered birds. The "guanay" Black cormoran (Phalacrocorax bougainvillii) distributed between 5° and 17°S, showing the greater concentrations between 8° and 12° SL, the Peruvian "piquero" distributed between 4° and 17° SL, being observed the greater concentrations between 8° and 15° SL; and the Peruvian "pelicano" was distributed throughout all the coast covered, with the greater concentrations in 6° LS near the island Lobos de Afuera. Also, "camanay" showed a normal distribution with the greater concentrations between 7° and 8° SL. The greater sightings of these species occurred in the neighborhoods of the deposit sea bears islands in front of La Libertad and Lambayeque coasts.

82 80 78 76 74 72

18

16

14

12

10

8

6

4 Pto. Pizarro

Pta. Sal

Talara


Pta. La Negra

MórropePimentel

Chérrepe

Chicama

Salaverry

Punta ChaoChimbote


Punta BermejoSupe

Huacho

Chancay

Callao

Pucusana

Cerro Azul

Tambo de MoraPisco


Punta Caballas

San JuanChala

AticoOcoña

QuilcaMollendo

IloSama

Tursiops truncatusDelphinus sp.Cetáceo menorDelphinus capensisGlobicephala sp.Fam. DelphinidaeBlack FishLagenorhynchus obscurusZiphius cavirostris

LEYENDA

Avistamientos de cetáceos menoresCrucero BIC Olaya 0602-04

Other species observed were, the Galapagos "albatros" Diomedea irrorata between 3° and 12° SL, whereas between 14° and 17° SL was replaced by the "albatros" Salvin D. cauta salvini and the "albatros" of gray head D. chrysostoma. Also observed a clear increase in the sightings of "pardelas" Puffinus sp. between 9° and 12° SL, being most abundant gray "pardela" Puffinus griseus . CETACEAN SIGHTING In total 117 sightings were made, of which 70,9% correspond to smaller cetaceans, being Delphinus sp most abundant specie (27,4%), the group of Delphinidae corresponds to herds that could not mainly be identified by the distance they were sighted and correspond to 22% of total, the dark dolphin Lagenorhynchus obscurus (6,8%), the dolphin "pico de botella", Tursiops truncatus (5.9%). The name of smaller cetacean corresponds to species that could not be identified due to show a single dorsal fin of any dolphin or whale of small size and corresponds to 3.4%, Blackfish is the used term. 82 80 78 76 74 72

18

16

14

12


10

8

6

4 Pto. Pizarro

Pta. Sal

Talara


Pta. La Negra

MórropePimentel

Chérrepe

Chicama

Salaverry

Punta ChaoChimbote


Punta BermejoSupe

Huacho

Chancay

Callao

Pucusana

Cerro Azul

Tambo de MoraPisco


Punta Caballas

San JuanChala

AticoOcoña

QuilcaMollendo

IloSama

Avistamientos de cetáceos mayoresCrucero BIC Olaya 0602-04

LEYENDABalaenoptera sp.Balaenoptera physalusMegaptera novaeangliaeFam. BalaenopteridaePhyseter macrocephalusCetáceo mayor

16

Pseudorca crassidens or Globicephala macrorhyrchus whose differentiation to long distance is almost impossible and correspond to 1,7%. The Ziphio de Cuvier, Ziphius cavirostris was sighted once (0,9%). Also were sighted 3 mixed herds composed by Delphinus sp. and Lagenorhynchus obscurus, in many cases the herds of Delphinus sp and Lagenorhynchus obscurus feeding itself with birds like Sula variegata, Sula nebouxii, Phalacrocrax buogainvilli y Puffinus griseus. For the case of greater cetaceans, the greater percentage corresponds to the group of Fam. Balaenopteridae. And they were whales that could not be identified by the distance of the animal (11,1%), Balaenoptera sp. (5,9%), the whale of fin, Balaenoptera physalus (4,27), the "jorobada" whale, Megaptera novaengliae (3,4%), was observed in most of the cases jumping or showing the caudal fin which facilitated its identification. The "cachalote", Physeter macrocephalus was sighted forming small groups of 2 or 3 individuals.

82 80 78 76 74 72

The sightings of Delphinus sp. were made in latitudes between 3º to 15ºS, with a decrease of these towards the south; Tursiops truncatus was seen between 3º 11ºS, Lagenorhynchus obscurus was seen between the 4 º and 17ºS with a tendency increase between 12º and 17ºS, Globicephala sp. was seen in a rank latitudinal but close that corresponds to 3º to 8ºS. The Blackfish was sighted between the 10° to 12ºS. The greater cetaceans, the "jorabada" whale was sighted between the 4° to 17ºS, Balaenoptera physalus between the 4° to 16 ºS Physeter macrocephalus between the 9° to 17ºS.

18

RESULTS DISCUSSION During the summer the anchovy acoustic evaluations are most reliable because the sea condition are very quite. Morever, the reduction of the anchovy area distribution, acoustic tracking, spawning and recruitment, are some of the aspects that justify the accomplishment of this work at this time. Nevertheless, oceanographical condition in this season have not occurred like usually. Apparently the marine environmental has been unstable with high dynamics of water masses, changing the anchovy distribution pattern. Last year 2005 marine environmental shown an abrupt change at north of 7°S by a sudden superficial warming, associated to the weakening of tradewinds. As consequence of this was a superficial layer (0 and 40m depth) altered with respect to the monthly average and abruptely interruption of the coastal upwelling process. To south of 13°S the environmental conditions were opposite to North zone, with a gradual winds fortification and strengthing of the coastal upwelling within the 10m that have forced the advance of Superficial Subtropical Waters (SSW). Consequence of these oceanographic conditions, the zones of greater concentration of anchovy were located within 40nm to south of 6°S and north of 10°S, with sea surface temperatures between 18° and 22°C. South of 15°S dispite of the presence of ample zones of good temperature for anchovy (16-23°C), this resource did not appear due to presence of Subantartical Temperated Waters (STW), cold water mass and low salinity, not very favorable for anchovy resource. The results of anchovy distribution obtained during the summers of both previous years, showed that distribution areas have diminished as a result of the high dynamics of marine environmental found in the present cruise, this condition has restricted anchovy to superficial zones and very near the coast. Is evident that the answer of the resource in front of this environmental conditions change, in this opportunity it is possible to see as the resource is restricted to coast influenced by the advance of three types of water masses, reducing its distribution to mixture areas and Cold Coastal Waters (CCW).


16

14

12

10

8

6

4 Pto. Pizarro

Pta. Sal

Talara


Pta. La Negra

MórropePimentel

Chérrepe

Chicama

Salaverry

Punta ChaoChimbote


Punta BermejoSupe

Huacho

Chancay

Callao

Pucusana

Cerro Azul

Tambo de MoraPisco


Punta Caballas

San JuanChala

AticoOcoña

QuilcaMollendo

IloSama

Avistamientos de cetáceos mayoresCrucero BIC Olaya 0602-04

LEYENDABalaenoptera sp.Balaenoptera physalusMegaptera novaeangliaeFam. BalaenopteridaePhyseter macrocephalusCetáceo mayor

17

On the other hand, the recruitment usually has a distribution pattern ordered by juveniles modals, that allow to identify the juveniles place. In summer 2006 had been found a total disorder, perhaps due to this unusual behaviour of water masses. Perhaps for this reason the recruitment practically is divided in two distant areas (6ºS-9ºS and 13ºS-16ºS). Also, haults executed by Hensen net show few areas of spawning. In the same way, during the routine samplings could be observed a high visceral fat content in all groups of sizes of anchovy fact close related with low reproductive activity.

CONCLUSIONS The environmental oceanographic characteristics have been very dynamic, a north of 9°S was weakening of south east tradewinds and towards south of 13°S it was found waters relatively cold, due to seasonal change and winds fortification. The coastal upwelling was very weak, extending until a maximum of 10nm from coast. Below the 50m depth Cold Coastal Waters (CCW) predominated, which indicates that sea temperature anomalies are superficial. The anchovy (Engraulis ringens) was the stock dominant in the coastal ecosystem, whereas "pota" Giant squid (Dosidicus gigas) in the oceanic environmental. The anchovy sizes structure showed a weak recruitment, lower than few last years. The anomalous distribution of juveniles is maybe a consequence of a very dynamic environmental. The anchovy showed two reproductively different zones (5° to 9°S and 10° to 16°S). At south of 10°S was observed a maturity structure corresponding to the period of "gonadal rest". The total biomass of anchovy was 8,014,877 metrical tons, with the greater abundances in front of 06° and 10ºS, towards south of 13ºS the estimations were very much smaller. The north-central stock represent 7,6 millions metrical tons and the south stock 0,4 millions metrical tons only.


18°S

17°S

16°S

15°S

14°S

13°S

12°S

11°S

10°S

9°S

8°S

7°S

6°S

5°S

4°S

18°S

17°S

16°S

15°S

14°S

13°S

12°S

11°S

10°S

9°S

8°S

7°S

6°S

5°S

4°S





MórropePimentel

ChérrepePacasmayo

ChicamaTrujillo

Salaverry

Punta ChaoChimbote


Punta BermejoSupe

Huacho

Chancay

Callao

Pucusana

Cerro Azul

Tambo de MoraPisco


Punta Caballas

San Juan

Chala

AticoOcoña

QuilcaMollendo

Pta. Bombom

IloSama

Verano 2004

1

5

10

50

100

250

500

750

1000

Val

ores

eco

inte

grad

os (

m²/m

n²)

Verano 2005Verano 2006

Summer 2004, Summer 2005 and Summer 2006

18

“Munida” Squat Lobster (Pleuroncodes monodon) and “vinciguerria” Panama Lightfish (Vinciguerria lucetia) were less abundant that in recently summers. The distribution of the “munida” Squat Lobster was very coastal, associated to cold waters of Cold Coastal Waters (CCW). The "Jurel" Horse Mackerel (Trachurus murphyi) was concentrated in the South zone associated with Superficial Subtropical Waters (SSW), whereas the presence of "caballa" Jack Mackerel (Scomber japonicus) was not significant. Other species like "bagre" Cat fish (Galeichthys peruvianus), "camotillo" Camotillo (Normanichthys crockery) and "samasa" Longnose Anchovy (Anchoa nasus) appeared in very small nucleus and near the coast. It was observed lower values of sightings sea birds if we compared with December 2005. Also, the concentration of sea birds was located close to the coast. The areas of small cetaceans concentration corresponds to latitudes from 3º to 13ºS and of big cetaceans concentrations from 3º to 7ºS and 9º to 13ºS.

Callao, April 18, 2006

Participant personnel in the cruise:

1. Ing. Ramiro Castillo Valderrama 2. Ing. Luis Escudero Herrera 3. Ing. Salvador Peraltilla Neyra 4. Ing. Anibal Aliaga Rosales 5. Ing. Noel Domínguez Obregón 6. Ing. Adolfo Gonzales Salas 7. Blgo. Andrés Chipollini Montenegro 8. Blgo. Angel Perea de la Matta 9. Blgo. Juan Rubio Rodriguez 10. Tlgo. Alejandro Echevarria Cazorla 11. Blgo Mariano Valverde Romero 12. Blgo. Eduardo Motta 13. Blga. Maria Nelly Sanjinez 14. Tco. Jairo Calderon Martell 15. Tco. Oscar Lozano Rubio 16. Tco. Carlos Robles Cáceres.

Ing. = Engineer Blgo. = Biologist Tco. = Technician Note: This document is a preliminary report. The final report is in preparation and will be published in a few days.

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