Résultats de la recherche
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Evidence of change to the environment, ecosystem and fishery within Area 48 indicates the need for continued precaution
) which was established in 1991 based on the maximum catches reported for each subarea. Since that time ... the ecosystem has undergone rapid environmental change. Several studies suggest that krill numerical ... changes are consistent with global evidence of the ecological effects of environmental change. At the same ... time catches in Subarea 48.1 have increased beyond the maximum pre-1991 catch for that subarea which ...
Meeting Document : WG-EMM-2019/29 : Auteur(s): S. Hill and A. Atkinson
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Distribution of mackerel icefish by size-group at South Georgia
results indicate that future surveys should be designed so as to provide a uniform sampling intensity over ... Abstract: The depth distribution of C. gunnari was investigated with data from 9 groundfish ... of 8 depth strata with mean depths of 112, 137, 165, 185, 208, 230, 257 and 308 m. Fish were divided ... abundance (number of fish km?2) indicated that depth of maximum abundance increased as the size of the fish ...
Meeting Document : WAMI-01/16 : Auteur(s): A.W. North and I. Everson (United Kingdom)
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Small scale krill surveys: simulations based on observed euphausiid distributions
the power of surveys to reliably detect changes in mean density indicate that with probability of Type ... distributions each of which is given 4 rotations. The results indicate that the coefficient of variation (c.v ... .) of mean krill density varies inversely with mean density, and is lowest for the survey design ... I and Type II errors 0.1 and 0.2 respectively, about 100 transects would be required to detect ...
Meeting Document : WG-KRILL-91/19 : Auteur(s): D.J. Agnew (Secretariat) and S. Nicol (Australia)
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Plan of research program of the Russian Federation in Subarea 48.5 (Weddell Sea) in season 2014/2015
subareas, where stock assessment should be carried out. In spite of hard ice conditions at most part of the ... Weddell Sea during most time of the year, this large water area is very similar with the Ross Sea. This ... similarity, which could be found in geographical location, bathymetric profile, currents system and follows ... with CCAMLR decision rules. The program contains schedule and research program of the third stage of ...
Meeting Document : WG-SAM-14/07 : Auteur(s): Delegation of the Russian Federation
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Plan of research program of the Russian Federation in Subarea 48.5 (Weddell Sea) in season 2014/2015
subareas, where stock assessment should be carried out. In spite of hard ice conditions at most part of the ... Weddell Sea during most time of the year, this large water area is very similar with the Ross Sea. This ... similarity, which could be found in geographical location, bathymetric profile, currents system and follows ... with CCAMLR decision rules. The program contains schedule and research program of the third stage of ...
Meeting Document : WG-FSA-14/09 : Auteur(s): Delegation of the Russian Federation
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Acquiring a ‘base datum of normality’ for a marine ecosystem: the Ross Sea, Antarctica
significant, natural top-down forcing for such a long time that it is a concept rarely considered by ... pelagic and neritic marine ecosystems is reviewed with concrete evidence given for its existence in the ... remains to be learned about cross-component interactions in the Ross Sea system. Should the RSShelfE be un ... opportunity to understand the processes that take place in a healthy, complete marine ecosystem. Author(s): D ...
Meeting Document : WG-EMM-04/20 : Auteur(s): D. Ainley (USA)
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The survivorship of rays discarded from the South Georgia longline fishery
results we can conclude that depth has a significant influence on the mortality of skate, with a predicted ... these findings that further survival experiment be conducted, particularly in more shallow waters where ... this experiment can also be used to calculate the expected skate mortality within the fishery, based on ...
Meeting Document : WG-FSA-03/57 : Auteur(s): M. Endicott and D.J. Agnew (United Kingdom)
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Data requirements for research fishing
Measure 24-01 (scientific research) requires that catch, effort and biological data be reported on a haul ... under CM 41-01 (exploratory fisheries) requires that catch, effort and biological data be reported on a ... . The proposal would see fishing vessels use form C2 throughout their campaigns, with scientific ...
Meeting Document : WG-SAM-12/07 : Auteur(s): Secretariat
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Analysis of gear loss by fishing vessels in the CCAMLR Convention Area as contribution to the marine debris program
improve collection of data on gear loss it is recommended that the C1 data form be modified to include ... the marine debris program in 1989. In 2017, WG-FSA recommended that lost fishing gear reported from ... vessels be included in annual updates on marine debris. Rates of hook loss in longline fisheries revealed ... there was a higher proportion of gear loss in areas where interactions with sea-ice are more likely. To ...
Meeting Document : WG-FSA-18/17 : Auteur(s): CCAMLR Secretariat
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Results of the sixth Ross Sea shelf survey to monitor abundance of sub-adult Antarctic toothfish in the southern Ross Sea, January 2017
Abstract: At its 2011 meeting, the Scientific Committee agreed that a time series of relative ... abundance from a well-designed survey could be a useful input into the Ross Sea stock assessment model. In ... predators: Terra Nova Bay in 2017, with McMurdo Sound surveyed in 2016. The estimated relative biomass index ... . Scaled length frequencies for the core strata indicate the progression of a strong year class that ...
Meeting Document : WG-SAM-17/01 : Auteur(s): K. Large, L. Robinson and S. Parker