ICES CM DocumentsThis collection contains ICES Conference and Meeting (CM) Documents authored/co-authored by Marine Institute staff.http://hdl.handle.net/10793/7352024-03-29T00:19:03Z2024-03-29T00:19:03ZThe deep water fisheries of the Rockall trough: some insights gleaned from Irish survey dataKelly, C.J.Connolly, P.L.Clarke, M.W.http://hdl.handle.net/10793/12072019-08-30T08:38:49Z1998-01-01T00:00:00ZThe deep water fisheries of the Rockall trough: some insights gleaned from Irish survey data
Kelly, C.J.; Connolly, P.L.; Clarke, M.W.
The Fisheries Research Centre (FRC) has conducted trawl and longline surveys in the Rockall Trough since 1993, fishing a total of 223 stations over the depth range 201 to 4,945m. Trawls produced greater species diversity and higher discard rates than longlines, which selected larger squalifurm sharks. In 1997, limited selectivity work, based on ten comparative tows, showed that the size range of roundnose grenadier (Coryphaenoides rupestris) caught using a commercial trawl (llOmm), with and without a small mesh end liner (30mm), were similar. This indicates that mesh size, because of poor selectivity and perceived low survival rates of escapees, may not be a useful management tool in the regulation of the trawl fishery.
This article was originally published by ICES on their website http://www.ices.dk/
1998-01-01T00:00:00ZA new scientific initiative with the Pelagic RAC to develop a management plan for western horse mackerelClarke, M.van Balsfoort, G.Coers, A.Campbell, A.Dickey-Collas, M.Egan, A.Ghiglia, M.Harkes, I.Kelly, C.O' Donoghue, S.Olesen, C.Roel, B.Tait, A.Uriarte, A.http://hdl.handle.net/10793/7712019-08-30T08:37:39Z2007-01-01T00:00:00ZA new scientific initiative with the Pelagic RAC to develop a management plan for western horse mackerel
Clarke, M.; van Balsfoort, G.; Coers, A.; Campbell, A.; Dickey-Collas, M.; Egan, A.; Ghiglia, M.; Harkes, I.; Kelly, C.; O' Donoghue, S.; Olesen, C.; Roel, B.; Tait, A.; Uriarte, A.
The western horse mackerel stock is currently managed by annual TACs covering only part of its distribution area. No stock assessment has been accepted and recent ICES advice has consistently been for status quo catches. In 2006, the Pelagic Regional Advisory Committee asked scientists to help with developing a harvest control rule for the stock that would both meet conservation and stability objectives. An initial questionnaire was circulated to the industry, to elicit feedback on possible management options. A series of Harvest Control Rules were developed. These were tested by simulation and presented to the RAC at a number of meetings. Results will be presented within the ICES advisory process and elsewhere in the scientific literature. This is a developing approach involving scientists and stakeholders in an iterative process. The problems encountered and lessons learned, are discussed.
This article was originally published by ICES on their website http://www.ices.dk/.
2007-01-01T00:00:00ZComparison of the effects of exploitation on theoretical long-lived fish species with different life-history strategies and the implications for managementCodling, E.A.Kelly, C.J.Clarke, M.http://hdl.handle.net/10793/7702019-08-30T08:37:38Z2005-01-01T00:00:00ZComparison of the effects of exploitation on theoretical long-lived fish species with different life-history strategies and the implications for management
Codling, E.A.; Kelly, C.J.; Clarke, M.
A stage-based simulation model is used to investigate the effect of exploitation on theoretical populations representing long-lived elasmobranch and teleost species with different life-history strategies. A comparison is made between the effect of exploitation on the elasmobranch ‘k-strategists’ and other teleost species that are ‘r-strategists’. We demonstrate the effects of stage-based exploitation on a typical long-lived elasmobranch population and discuss the implications of this when designing a management plan to ensure survival of the stock.
This article was originally published by ICES on their website http://www.ices.dk/.
2005-01-01T00:00:00ZGrowth rate fluctuations of herring in the Celtic Sea: a history of life on the edgeLynch, D.Wilson, J.Clarke, M.http://hdl.handle.net/10793/7382019-08-30T08:37:20Z2011-01-01T00:00:00ZGrowth rate fluctuations of herring in the Celtic Sea: a history of life on the edge
Lynch, D.; Wilson, J.; Clarke, M.
The most south-western herring populations in Europe occur in the Celtic Sea, south of Ireland. Biological sampling has been conducted since the 1920s and routinely since 1958. This study collated and analysed these long term data for the first time. Overall results were examined in the context of time series of environmental data and population scale indices of population status. Size at age was low in the 1920s and 1950s, but increased to a peak in the 1970s before declining strongly until recently. Condition factor over time declined, whilst growth rates were greater in the 1960s and 1970s than in the 1980s and 1990s. Further analyses suggest that the changes are influenced by environmental factors, especially the North Atlantic Oscillation sea surface temperature, and the abundance of Calanus copepods. The implications of this work, for the rational management of this stock, are discussed.
This article was originally published by ICES on their website http://www.ices.dk/.
2011-01-01T00:00:00Z