SWIMMER CRAB CULTURE IN THE POND, WHY NOT?

By : Lisa Ruliaty, Darmawan, A and Agus Basyar

A.H

MAIN CENTER FOR BRACKISHWATER AQUACULTUREJEPARA - 2016

INTRODUCTION (1) Swimmer crab included in to important export

comodity after shrimp and fish. the raw material for crab meat processing plant in

getting the swimmer crab catches of fishermen at the sea.

Indonesian ministry regulation no.1 on year 2015 regarding prohibition of catching lobster, swimmer crab and mud crab.

The solution is to do aquaculture in the pond. So far, mostly people think that swimmer crab

culture in the pond is impossible. MCBA Jepara has culture swimmer crab in the

pond since 2002 till 2006.

Profile swimmer crab culture at the MCBA 2002 - 2006

Parameter 2002 2003 2005 2006Size of pond (m2) 1,000 7,000 1,000 (2

ponds)2,000

Stock density (pcs/m2)

3 (3,750 pcs)

5 (35,000 pcs)

5 (5,000 pcs/ponds)

3 (6,000 pcs)

Duration culture (month)

3.5 4 4 4

Culture System Mono Mono Mono MonoFeed - Artificial

feed- - Fresh

fish

- Artificial feed.

-- Fresh fish

Artificial feed (MCBA

and comersiil

pellet)

Fresh feed

Harvest (kg) 200 350 49 / 44 150Size (pcs/kg) 8 - 10 10 - 11 13 - 15 10 – 11SR (%) 55 11 14 / 15 28Salinity (ppt) 33 - 37 33 - 40 30 - 37 25 - 35

Profile of Swimmer Crab’s Weight Growth

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 160

20

40

60

80

100

120 105

89

65

62

90

2002 2003 2005(A) 2005 (B) 2006

Weeks

Wei

ght (

g)

Its showing that our swimmer rab culture have weight increase in every period culture.

Profile of Carapax’s Width Growth

0 2 4 6 8 10 12 14 1602468

1012 11

2006

Weeks

Cara

pax’

s W

idth

(cm

s)

The same also found in crapax width. The data only available on 2006

INTRODUCTION (2) Problems :1. Swimmer crab’s SR is still low2. Dependence on fresh feed, although there is

change to give artificial feed.

Based on Ministry’s Regulation No. 01 in 2015, MCBA Jepara started again to culture swimmer crab in the pond in both ponds belongs to MCBA and the farmers.

In 2015, we have culture swimmer crab in MCBA’s pond and gave baby swimmer crab’s aid to farmers group in 3 districts, ie. Pangandaran, Pati and Demak to culture swimmer crab in both ponds and mangrove’s area.

MCBA’s Pond

Parameter Date of stock : Apryl 28, 2015Size of pond (m2) 7,000Stock density (pcs/m2)

2 (14,600 pcs crablet with carapax width 2 – 2.5 cm)

Duration culture (month)

5

Culture System Policulture (seaweed, milkfish and swimmer crab)

Feed - Fresh feed 2 – 3 times/day based on biomassHarvest (kg) 146 kg. (swimmer crab), 3.000 kg

(seaweed), and Milkfish (size 6-8 pcs/kg)

Size (pcs/kg) 10 - 11SR (%) of Swimmer crab

10

Salinity (ppt) 30 - 36

Farmer’s Pond MCBA Jepara, gives baby swimmer

crab’s aid to farmers group, technical input and do final monitoring of activity.

Operational fund and operational activity was done by farmer’s group, Theirself.

PANGANDARANGroup’s Name

Address Culture System Monitoring

FINTOUR Bojongsalawe, Karangjaladri Village, Parigi, Pangandaran District, West Java, Indonesia

• Date of stock = June 30, 2015.• Pond size = 5.000 m2.• Polyculture system of 15.000 pcs swimmer crab crablet with size 0,5 - 1 cms, Juvenile milkfish with size 3-5 cms as much 700 pcs.

Sept 28, 2015 : 1. No sea water show

off get in to the pond, hot themperature and high salinity (40 ppt).

2. Milkfish and swimmer crab died.

3. Size : swimmer crab harvested as much 12 kgs, with size 35 pcs/kgs (28,5 – 30 g/pcs) and milkfish as much 18 kgs, with size 12 pcs/kgs (83,3 g/pcs).

4. SR of swimmer crab = 2,8 % (420 pcs).

Fintour Pond

Group Name

Address Culture System

SILVOFISHERIES

Bojongsalawe, Karangjaladri Village, Parigi, Pangandaran District, West Java, Indonesia

• Date of stock = Dec 26, 2015.• Extentsion of mangrove’s area = 40,000 m2.• The area has pen culture with hapa net.• Polyculture system of Penaeus monodon shrimp, milkfish and swimmer crab.• Swimmer crab (20.000 pcs, with carapax’s width 1 – 2 cms).• Penaeus monodon shrimp (20.000 pcs, age Pl-20) • Juvenile Milkfish 2.000 pcs (with size 5 – 7 cms)

Silvofisheries Pond

MonitoringFebruary 29, 2016 Apryl 15, 20161. Salinity 20 – 15 ppt; 2. Size = • Penaeus monodon

shrimp 10 – 15 grams; milkfish 15 – 20 pcs/kgs; swimmer crab 30 – 50 g/pcs (squared matches);

• They didn’t do harvesting due to the place is in mangrove’s (conservation) area so they let Them for continuity.

1. Swimmer crab has been harvested (they took the male only) with size 3 - 4 pcs/kgs. ± 100 – 150 kgs.

2. They let the female mature ovaries so they can get many baby swimmer crab in mangrove’s area.

Group Name

Address Cultivation System

RUKUN NELAYAN

Bojongsalawe, Karangjaladri Village, Parigi, Pangandaran District, West Java, Indonesia.

• Date of Stock = December 26, 2015.• They used pool which made by tsunami with size up till 20,000 m2.• Stock density = Swimmer crab : 20.000 pcs (carapax’s width 1 - 1,5 cms)

Rukun Nelayan – Tsunami Pond

MonitoringFebruary 29, 2016 Apryl 15, 20161. Salinity 32 ppt;2. Size = Swimmer crab :

weight 30 – 50 g/pcs.3. Continueable

cultivation, they don’t harvesting.

1. Partially harvesting using plaited rattan fish trap.

2. Caught size 3 - 4 pcs/kgs. ± 50 – 75 kgs.

PANGANDARANGroup Name

Address Cultivation System

Monitoring

KADUS DEDY

Bojongsalawe, Karangjaladri Village, Parigi, Pangandaran District, West Java, Indonesia

• Date of spread : December 26, 2015.• Pond extents = 5.000 m2.• Polyculture system of Penaeus monodon shrimp and swimmer crab.• Amount : 2.000 pcs swimmer crab crablet with size 1 – 1,5 cms, and Penaeus monodon shrimp 5.000 pcs with size Pl-20.

February 29, 2016: 1. Penaeus monodon

shrimp, with size 5 – 8 g/pcs.

2. Swimmer crab with weight 30 – 40 g/pcs.

Apryl 15, 2016 :3. Swimmer crab has

harvested ± 20 – 30 kgs. Size 5-8 pcs/kg

4. Penaeus monodon shrimp died.

Kadus Dedy Pond

PANGANDARANGroup Name

Address Cultivation System Monitoring

BERKAH ANUGRAH

Karang Jaladri Village, Parigi, Pangandaran District, West Java, Indonesia

• Date of stock December 26, 2015.• Pond size = 20,000 m2.• Polyculture System of Penaeus monodon shrimp and swimmer crab.• Amount : 20.000 pcs swimmer crab crablet with width carapax 1 – 1,5 cms, and Penaeus monodon shrimp as much 50.000 pcs in size Pl-20.

February 29, 2016: 1. Salinity 18 ppt. 2. Penaeus monodon

shrimp, with size 8 - 10 g/pcs.

3. Swimmer crab with size 30 – 40 g/pcs.

Apryl 15,2016 :4. Swimmer crab has

been harvested using plaited rattan fish trap with size 6 – 8 pcs/kgs (150 g/pcs). ± 50 - 70 kg.

5. Penaeus monodon shrimp not harvesting yet but They can’t grow up , They stable in size 10 – 15 g/pcs.

Berkah Anugrah Pond

DEMAKGroup Name

Address Cultivation System

Monitoring

KUB. PUTRA AL-BAROKAH

Betahwalang Village, Bonang, Demak District, Central Java, Indonesia.

• Date of stock : November 7, 2015.• Pond size = 3.000 m2• Stock quantity of swimmer crab : 3.750 pcs crablet with size 2 – 3 cms.• Salinity when stock = 35 ppt

December 7, 20151. Salinity 18 ppt. 2. Carapax’s width of

swimmer crab 3 – 4 cms with weight 10 - 15 g/pcs.

Januari 7, 2016 :3. Salinty 10 ppt .4. A lot of swimmer

crab was died, the water themperature was high due to season changing to rain so the air was hot.

5. Weight 30 g/ pcs, carapax’s width 4 – 5 cms.

January 20, 20166. Salinity 3 ppt.7. All of the swimmer

crab was died.

Putra Al-Barokah -Betahwalang Pond

PatiGroup Name

Address Culture System

KELOMPOK NELAYAN BINO MAKMUR

Keboromo Village, Tayu, Pati District, Central Java, Indonesia

• Polyculture System of milkfish and swimmer crab.• Ponds 1 with size pond 10,000 m2, ponds 2 with size 3000 m2.• Stock quantity in pond 1 on December 17, 2015 : 15.000 pcs of swimmer crab with carapax’s width 1 – 1,5 cms and 5.000 pcs of milkfish bunch with age 1 month cultivation.• Stock quantity in pond 2 on December 28, 2015 : 3.000 pcs (carapax’s width 2 – 2,5 cms) and 5.000 pcs of juvenile milkfish with age 1 month cultivation.• Salinity when stock = 34 ppt.

Bino Makmur – Keboromo Pond

MonitoringPonds 1 Ponds 21. January 22, 2016. • Salinity 32 ppt; carapax’s width of swimmer crab 3 cms.

2. February 1, 2016.• Salinity 15 ppt; • A lot of swimmer crab was died, carapax’s width 4 cms.

3. March 1, 2016.• Salinity 3 ppt, • All of the swimmer crab was died.• Milkfish still able to harvested with weight 100 – 120 grams/pcsr (10 – 8 pcs/kgs)

1. January 22, 2016. • Salinity 32 ppt; carapax’s width of swimmer crab 3 cms.

2. February 1, 2016.• Salinity 15 ppt; • A lot of swimmer crab was died, carapax’s width 4 cms.

3. March 1, 2016.• Salinity 3 ppt, • All of the swimmer crab was died.• Milkfish still able to harvested with weight 100 – 120 grams/pcsr (10 – 8 pcs/kgs)

CONCLUSION Swimmer crab cultivation able to be

done in the pond. Swimmer crab cultivation as

conservation of mangrove area could be done using pen culture with hapa net.

SUGGESTION Swimmer crab culture in ponds must be

considered with growing season, stocking densities , feeding strategy and cannibalism rate reduction by providing shelter.

To increase the productivity of ponds , we recommend that polyculture system can be used during swimmer crab culture (seaweed / milkfish/ tiger shrimp).

We need to do a study of feed formulations which is made to raise the swimmer crab.

THANK YOU