Resultados de la búsqueda
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A balanced trophic model of the ecosystem of the Ross Sea, Antarctica, for investigating effects of the Antarctic toothfish fishery
Sea with which to investigate effects of the fishery for Antarctic toothfish (Dissostichus mawsoni). A ... survey of the available literature provided an initial set of parameters describing the abundance ... (diets, predators) for major groups of biota. We also estimated the level of uncertainty on these ... simultaneously. We set ecotrophic efficiency to unity for all non-primary producers. Changes to the initial set ...
Meeting Document : WG-EMM-07/18 : Autor(es): M.H. Pinkerton, S.M. Hanchet and J. Bradford-Grieve (New Zealand)
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A tale of two islands: contrasting fortunes for sub-Antarctic skuas at the Prince Edward Islands
, continuing an apparent decrease in this species at Marion Island since the 1980s. There is no evidence that ... . Crawford Title: A tale of two islands: contrasting fortunes for sub-Antarctic skuas at the Prince Edward ...
Meeting Document : WG-EMM-10/P03 : Autor(es): P.G. Ryan, P.A. Whittington and R.J.M. Crawford
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AERIAL SURVEYS OF WEDDELL SEALS DURING 2007-08, WITH NOTES ON THE HISTORY OF AERIAL CENSUSES IN THE ROSS SEA AND RECOMMENDATIONS FOR CONTINUED COUNT EFFORT
Abstract: Weddell seals (Leptonychotes weddellii) have proved to be an important predator of ... AERIAL CENSUSES IN THE ROSS SEA AND RECOMMENDATIONS FOR CONTINUED COUNT EFFORT Approval: Approved ...
Meeting Document : WG-EMM-08/23 : Autor(es): D. Siniff and D. Ainley (USA)
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A by-catch guide for commonly caught species in CCAMLR longline and trawl fisheries
to develop a bycatch guide for commonly caught fish and skate species in CCAMLR longline and trawl ... fisheries. The guide consists of comprehensive descriptions for 21 species, and two additional appendices ... which contain detailed descriptive keys for Macrourid (Grenadier) identification, and for juvenile fish ... caught in the CCAMLR krill fishery. The Secretariat thanks members for access to materials, and for ...
Meeting Document : WG-FSA-16/17 : Autor(es): CCAMLR Secretariat
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Estimating fishing gear selectivity for Patagonian toothfish (Dissostichus eleginoides) caught by trawlers on the Heard Island plateau region (Division 58.5.2) using trawl and longline length frequency data and forward-calculated continuation ratios
Abstract: Length-dependent fishing selectivity for trawlers fishing for the Patagonian toothfish ... selectivity and a plateau section in between for the length range where fish are assumed fully selected. Using ... random length frequency (LF) data collected from each of trawlers and longliners for fishing seasons 2003 ... -2005 the upper arm of the gear selectivity function for trawlers is estimated using a two-stage process ...
Meeting Document : WG-FSA-05/65 : Autor(es): S.G. Candy (Australia)
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Method for collecting of data on traumatic death of krill passed through the trawl meshes
Abstract: Fishing for krill Euphasia superba Dana has been conducting using midwater trawls of ... different constructions including beam-trawl for several last decades. Not all krill in harvesting zone of ... is applicable for rating of krill traumatic damage, received by it during trawling from cover of net ... bag, only for fishing with hauling of full net for catch extraction. The analogous rating for fishing ...
Meeting Document : WG-EMM-12/43 : Autor(es): V.V. Akishin, I.G. Istomin, V.A. Tatarnikov, A.F. Petrov and R.O. Lebedev (Russia)
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The random stratified trawl survey to estimate the abundance of Dissostichus eleginoides and Champsocephalus gunnari in the waters of Heard Island (Division 58.5.2) for 2016
April, with the completion of 163 stations. The survey was conducted for the second year on the FV Atlas ... was half that of 2015 but similar to that of the long-term average for the survey. The C. gunnari ... density was five times that of 2015 and nearly three times the average. For the managed bycatch species ... catch rates were lower than the average for macrourids, close to average for C. rhinoceratus and only ...
Meeting Document : WG-FSA-16/23 : Autor(es): G.B. Nowara, T.D. Lamb and D.C. Welsford
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Maturity stages for skates (Rajiformes)
Abstract: Current CCAMLR maturity stages for skates (Rajiformes) use a three-stage key. As such ... manual could lead to some confusion between fish at stage 2 and stage 3 (mature). Suggestions for ... updating the descriptions of the maturity stages for skates are provided, as is a rationale for considering ... a four-stage key that allows for the collection of data for fish that are at active stages of the ...
Meeting Document : CCAMLR-XXXIII/03 : Autor(es): J. R. Ellis, S.R. McCully Phillips and V. Laptivovsky (United Kingdom)
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Maturity stages for skates (Rajiformes)
Abstract: Current CCAMLR maturity stages for skates (Rajiformes) use a three-stage key. As such ... manual could lead to some confusion between fish at stage 2 and stage 3 (mature). Suggestions for ... updating the descriptions of the maturity stages for skates are provided, as is a rationale for considering ... a four-stage key that allows for the collection of data for fish that are at active stages of the ...
Meeting Document : WG-FSA-14/33 : Autor(es): J.R. Ellis, S.R. McCully Phillips and V. Laptivovsky (United Kingdom)
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Update of analysis on sea-ice concentration of southern part of 48.6 and 58.4.2 for the new research block on expected spawning ground of TOA
the period (2002-2017 until April) for 48.6_4 and 48.6_5. In addition, we also analyze the ice ... concentration of 58.4.2 to examine accessibility there for fishing vessels as candidate for a new research block ... . This research block is hypothesized as one of spawning grounds for TOA by Taki (WG-FSA-16/32 Rev. 1 ... ) and hence it should be covered by research for stock assessment in the near future. Author(s): T ...
Meeting Document : WG-SAM-17/10 : Autor(es): T. Namba, T. Ichii and T. Okuda