Résultats de la recherche

1. 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 : Auteur(s): E. Abraham and J. Pierre (New Zealand)

2. 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 : Auteur(s): K. Reid, S. Hill and T. Diniz (United Kingdom)

3. LENGTH AND AGE AT SPAWNING OF ANTARCTIC TOOTHFISH DISSOSTICHUS MAWSONI IN THE ROSS SEA

   Abstract:  This study uses a histological assessment of age and length at spawning for female and ... spawn in a given year and is therefore appropriate to evaluate spawning stock biomass relative to stock ... management decision rules. A characterisation of the oocyte developmental cycle of Antarctic toothfish shows ... cortical alveoli stage at least a year prior to spawning. Individual oocytes are then recruited into the ...

   Meeting Document : WG-FSA-09/37 : Auteur(s): S.J. Parker and P.J. Grimes (New Zealand)

4. 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 : Auteur(s): S.G. Candy (Australia)

5. Development of methods for evaluating the management of benthic impacts from longline fishing using spatially explicit production models, including model validation

   vulnerable marine ecosystems (VMEs). We describe a spatially explicit production model that can be used to ... investigate a range of scenarios for simulating the effect and management of benthic impacts from longline ... fishing effort. Further, we update this paper with a set of simulations using a range of simple and ... carried out under a range of productivity assumptions, impact, and spatial scale, with and without ...

   Meeting Document : WG-FSA-10/29 : Auteur(s): A. Dunn, S.J. Parker and S. Mormede (New Zealand)

6. 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 : Auteur(s): United Kingdom, Norway, Chile, ASOC and ARK

7. 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 : Auteur(s): Delegations of Argentina and Chile

8. 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 : Auteur(s): S.J. Bury, M.H. Pinkerton, D.R. Thompson, S. Hanchet, J. Brown and I. Vorster (New Zealand)

9. 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 : Auteur(s): A.F. Amos, J.L. Bengtson, O. Holm-Hansen, V.J. Loeb, M.C. Macaulay and J.H. Wormuth (USA)

10. The use of predator-derived krill length-frequency distributions to calculate krill target strength

    ecosystem based approach to resource management. We propose a method using krill sampled from the diet of ... predators to provide a length-frequency distribution of krill at times when it is possible to run automated ... operations. This will allow a robust estimate of krill abundance to be estimated from acoustic data. Changes ... in the length-frequency distribution of krill over a period of few weeks produced a 10 % difference ...

    Meeting Document : WG-EMM-00/42 : Auteur(s): K. Reid and A.S. Brierley (United Kingdom)

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