Search results
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An ecological risk assessment of current conservation measures for krill fishing in East Antarctica (CCAMLR Divisions 58.4.1 and 58.4.2)
involved in any redevelopment of a commercial krill (Euphausia superba) fishery in CCAMLR Divisions 58.4.1 ... has a high likelihood of achieving CCAMLR’s objectives in this region. This paper outlines a ... measures that are relevant to Divisions 58.4.1 and 58.4.2 sufficiently mitigate the risk of a krill fishery ... Divisions 58.4.1 and 58.4.2, suggests a distribution of catch across the four subdivisions. This risk ...
Meeting Document : WG-EMM-18/37 : Author(s): N. Kelly, L. Emmerson, S. Kawaguchi, C. Southwell and D. Welsford
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Mincing, mealing and batching: waste management strategies aimed at reducing seabird interactions with trawl vessels
to a paste before it was discharged reduced the number of seabirds around the vessels. The first ... trial was on a mid-water trawler targeting hoki (Macruronus novaezelandiae), and the experiment on this ... (Nototodarus sloanii). There was no meal plant on board and the mealed treatment was replaced with a batching ... was determined by counting the number of birds within a 40m-radius semi-circular sweep zone behind the ...
Meeting Document : WG-FSA-07/42 : Author(s): E. Abraham and J. Pierre (New Zealand)
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Mackerel icefish Champsocephalus gunnari in the diet of upper trophic level predators at South Georgia: implications for fisheries management
important prey species for a number of upper trophic level predators, and is the target of commercial ... % of the diet by mass of gentoo penguins. The length-frequency distributions of C. gunnari indicated a ... 1993, 1996, 1999 and 2001. A recruitment index based on the contribution by mass of the 1+ age-class in ... the diet of gentoo penguins indicated a higher degree of variability in recruitment than in considered ...
Meeting Document : WG-FSA-03/74 : Author(s): K. Reid, S. Hill and T. Diniz (United Kingdom)
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INCORPORATING SAMPLING VARIATION AND RANDOM READER ERROR INTO CALCULATION OF EFFECTIVE SAMPLE SIZE IN THE APPLICATION OF AGE LENGTH KEYS TO ESTIMATION OF CATCH-AT-AGE PROPORTIONS
observations that contribute to the objective function via a multinomial likelihood. The multinomial likelihood ... requires a nominal sample size for each fishery and year combination. A method is described for estimating ... Monte Carlo multinomial replicates of the observed age length key (ALK) with each ALK used to generate a ... replicate age frequency sample. For each replicate a random draw of the ageing error matrix is taken and ...
Meeting Document : WG-SAM-09/08 : Author(s): S.G. Candy (Australia)
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Bridging the krill divide: understanding cross-sector objectives for krill fishing and conservation
Abstract: In June 2014, the ICED programme, the British Antarctic Survey and WWF co-hosted a two ... . This included shared commitment to maintaining a healthy ecosystem and support for management of the ... agreed that current levels of fishing have a low risk of significant impacts but that there is no need to ... increase catch limits. Participants also agreed that the objectives of management must include a healthy ...
Meeting Document : SC-CAMLR-XXXIII/BG/34 : Author(s): United Kingdom, Norway, Chile, ASOC and ARK
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Simulating nursery areas for Antarctic krill along the western Antarctic Peninsula with relevance for the Domain 1 MPA Planning process
Abstract: Antarctic krill (Euphausia superba) is a key species and a dominant grazer in the ... that conditions a successful completion of the cycle. The objective of the present study is to estimate ... along the western Antarctic Peninsula (WAP) shelf. This objective was addressed using a one-dimensional ... with temperature and density fields from a high-resolution model scaled by projections for 2030 for the ...
Meeting Document : SC-CAMLR-XXXVI/BG/12 : Author(s): Delegations of Argentina and Chile
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CCAMLR Scientific Scholarship Scheme
order to help generate and sustain a sound basis of scientific expertise able to support the ... requirements of CCAMLR in the long term. Scholarships of up to A$30 000 are available to facilitate ... , and exceptionally, meetings of the Scientific Committee, over a period of two years. Scholarships are ... recipient of a scholarship has a ‘Mentor’ who is familiar with the work processes and procedures of CCAMLR ...
Page : Site Section: Science
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INVESTIGATING LENGTH AT MATURITY OF ANTARCTIC TOOTHFISH (DISSOSTICHUS MAWSONI) BASED ON SCIENTIFIC OBSERVERS’ DATA
observers’ staging data were highlighted and GSI is recommended as a better indicator of maturity status in ... Antarctic toothfish. Reports of histological analyses of a small number of Antarctic toothfish showed ... a limited number of fish, most of which were from the southern area, therefore not on obviously ... spawning fish. Histological analysis using a hindcasting assessment of 683 samples collected in December to ...
Meeting Document : WG-FSA-08/48 : Author(s): S. Mormede, S. Parker and P. Grimes (New Zealand)
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Trophic study of Ross Sea Antarctic toothfish (Dissostichus mawsoni) using carbon and nitrogen stable isotopes
indicate that, very generally, larger fish consume prey of a higher trophic level than smaller fish. There ... were substantial residual within-species variations in δ15N and δ13C. Dissostichus mawsoni exhibited a ... rostrata (2.7 ‰ range) showed a d15N range greater than 3.4 ‰ spanning more than one trophic step. This ... implies that the diet of all species sampled was variable, or that individual species were eating a ...
Meeting Document : WG-EMM-08/27 : Author(s): S.J. Bury, M.H. Pinkerton, D.R. Thompson, S. Hanchet, J. Brown and I. Vorster (New Zealand)
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Surface water masses, primary production, krill distribution and predator foraging in the vicinity of Elephant Island during the 1989-90 austral summer
Abstract: Four successive surveys of the pelagic marine environment were conducted over a 100-by ... predators. A hydrographic front, north of Elephant Island and aligned southwest-to-northeast, persisted ... of it. A second front was apparent at the eastern side of the study area and was tentatively ... mature and exhibited a general transition from reproductively active to gravid and spent individuals. A ...
Meeting Document : WG-CEMP-90/11 : Author(s): A.F. Amos, J.L. Bengtson, O. Holm-Hansen, V.J. Loeb, M.C. Macaulay and J.H. Wormuth (USA)