official posters from ibis-ast salmon stocking conference, 27-28 november 2013, glasgow
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7/22/2019 Official Posters from IBIS-AST Salmon Stocking Conference, 27-28 November 2013, Glasgow
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Robert Brackley1
Supervisors: Colin Bean2and Rhian Thomas11University ofGlasgow, 2Scottish Natural Heritage
Introduction! Inresponse to a growing needfor renewableenergy, theprevalence ofsmall scalehydro-electricgenerating schemesis burgeoning intheUK andIreland. ! Smallscaleschemesareperceivedas environmentally benign, but their impact onthe naturalaquaticfauna ispoorly understood.
! Migratory fishspecies may beat risk fromloss oflongitudinal connectivity becauseof thephysicalandbehavioural barriersintroduced by hydropowerabstractions. Thereis also a risk ofdirect damageto animalsduring passagethroughhydropower infrastructure.
! Current work isfocussed onunderstanding theimpacts ofsmall-scale schemesupon themigratorybehaviourofsalmonids: thespawning migrationof adult fishand theseaward migrationofj uveniles.
Aprojectsupportedby the EuropeanUnion's INTERREGIVAProgramme managedby the SpecialEU Programmes Body
Aims and methods! Thebroadaimsoftheproject are:
to examinetheimp licationsofflow regulationandhydropower sitelayout onfishpassage, and
to assesstherisk posedto fishby a novelturbinetype: theArchimedeanscrew turbine
! Themovementsof naturally migrating f ishthroughhydropowersystemsare being monitoredusing radio andpassive integratedtransponder (PIT)tags. Passagebehaviour may thenbe relatedtositelayout andflow management.
! Potentialdamageto f ishby Archimedeanscrew turbineswillbeassessedusing surrogatesandnaturally moving fish.
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7/22/2019 Official Posters from IBIS-AST Salmon Stocking Conference, 27-28 November 2013, Glasgow
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3"'0$-6,2"' %&4&* $024,2"'0Hannele Honkanen
University of Glasgow
Introduction! Atlantic salmon has a long history of being the target of commercial and recreational fisheries and while Atlantic salmon as a species is far fromextinction due to the numbers of farmed salmon, the wild Atlantic salmon stocks throughout their range are declining with many populations nowextirpated (Parrish et al. 1998).
! Conservation limit (CL) defines the level of spawning stock under which recruitment would begin to decline significantly (Anon, 2011).! Knowledge of the species biology and habitat requirements can be linked with habitat data to create a model that predicts the distribution of thatspecies. As salmonids have fairly strict habitat requirements, this can be used to estimate the relationship between the stream habitat and salmonidabundance (Armstrong et al. 2003).
! Loughs Agency monitors salmonid populations in the Foyle and Carlingford catchments in the border region of Ireland and Northern Ireland and usesa model to estimate the sizes of salmon populations in the rivers. The model includes collected information on redd counts, electrofishing data onjuveniles, fish counters and habitat surveys, and is used to estimate river-specific conservation limits and management targets which form the basis of thefishery management in the area.
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Interactions between fisheries and wildfowl on Lough Foyle
Luke Murphy
Queens University Belfast
Introduction
! Lough Foyle is an important fishery for aquaculture, wild fisheries and recreational angling. It is also an important wildfowlreserve for both migrating and native waterfowl.
! Lough Foyle is experiencing an increase in shore based aquaculture particularly on the southern shoreline.! The Interactions between the fisheries and the wildfowl on Lough Foyle has not been assessed.! Salmon fisheries on Lough Foyle are experiencing increasing levels of predation from cormorants.! There has been a massive decline in the number of salmon returning to Lough Foyle and its tributaries.! Assessment of the impact of cormorant predation could lead to improved cormorant management.To critically assess the intertidal wildfowl populations on Lough Foyle and determine whether
shellfish fisheries and aquaculture operations are affecting these populations.
To study the effects of cormorant predation on Atlantic salmon Salmo salar smolts on Lough
Foyle and its tributaries.
A project supported by the European Union's INTERREG IVA Programme managed by the Special EU Programmes Body
Summary
! At the moment regulation and licencing of shellfish aquacultureon Lough Foyle is a contentious subject and there are many
unlicensed aquaculture operations on the Foyle.
! The findings from this study will help with the regulation andmanagement practices of aquaculture for the Loughs Agency (The
aquaculture licencing authority on the Foyle).
! The study will produce a baseline population survey for thewildfowl population of Lough Foyle
! The study will highlight an improved method for cormorantmanagement on salmon fisheries
Objectives
!To complete a habitat assessment for the intertidal zone of LoughFoyle and establish a catalogue of various habitats found on Lough
Foyle and their locations.
!To survey the wildfowl populations species, behaviours and numberson a selection of these habitats throughout the year.
!To assess whether the shellfish fisheries and aquaculture operationsare having an effect on the wildfowl populations numbers, behaviours
and habitat.!
To link the data gathered on this project with similar IBIS studies beingconducted on Carlingford Lough and determine if any fisheries/
aquaculture interactions if any, are unique to Lough Foyle.
!To assess whether the findings will have implications for the regulationand management practices of the shellfish fisheries and aquaculture
industries on Lough Foyle.
!To assess the impact of cormorant predation on Atlantic salmonsmolts.
!To track the movement of cormorants during the smolt run.
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7/22/2019 Official Posters from IBIS-AST Salmon Stocking Conference, 27-28 November 2013, Glasgow
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Assessing the Impact of Riverine barriers on the
Freshwater Migration of Atlantic Salmon
Matthew NewtonUniversity of Glasgow
Introduction
! Salmon are a migratory fish and occupy different parts of a river during their life cycle! As part of the European Union Water Framework Directive (WFD) all member states have to ensure that migratory fish can move withinrivers unimpeded by man-made barriers
! Barriers in rivers such as dams, weirs and culverts under roads can create barriers to fish migration by preventing free movement alongrivers and can have a considerable effect on fish populations
! While the effects of very large barriers are now well understood, the effects of relatively small-scale barriers on fish migration is very poorlyunderstood
! The number of these small-scale barriers in our rivers is considerable and understanding their impact on fish stocks is essential to meetWFD targets
Summary
! European Union WFD targets require member states toensure rivers are free of barriers to fish migration
! The effects of small-scale barriers on fish riverine migrationis not well understood
! It is essential for fishery managers and policy makers tounderstand the impacts of these barriers to effectively conserve
salmon stocks
! Ground breaking work undertaken in this project will unearthpreviously unknown behaviour of adult salmon in response to
migration barriers
! Results from this project will provide insight into how adultsalmon negotiate small scale barriers and the effects these
barriers pose to populations
! Information gained through this study will developmanagement strategies and inform policy to protect this rapidly
declining resource
Investigate how salmon use fish pass channels in large weir systems and the
effects of small-scale barriers in river systems to develop management options
for WFD targets.
Project Outline
! Radio tag 132 Atlantic salmonand use telemetry to monitor
individual behaviour
! Physical details (e.g. length &weight) of individual fish will be
recorded to investigate if specific
characteristics are related with
barrier passage success.
! Listening zones will detectfish at specific locations
enablingroute selection
identification
!Flow modelling will identifychannel use and effect ofAttraction Channels
Extent of the problem
!Environment Agency estimates 25,000 obstructions present in Englandand Wales.
!3,000 of the above cause a significant impact to migration and wouldrequire mediation under WFD and Eel directives.
!Cost of 532 million to improve passage at these sitesIs it possible to provide true remediation despite not knowing the actual
behaviour of salmonids in response to small riverine barriers?
Radio Telemetry
Radio tags emit a codedfrequency which can be
detected through receiverequipment on land
Tags are inserted oesophgallyinto the fish. Salmon do not feed
in freshwater and so tag issecure and does not effect fish
behaviour
Receiving equipmentallows fish to be
pinpointed within theaquatic environment
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