Résultats de la recherche

1. Predation release of Antarctic silverfish (Pleuragramma antarctica) in the Ross Sea

   Abstract:  Between 2001 and 2013 the number of breeding pairs of Adélie penguins (Pygoscelis ... adeliae) at breeding colonies in the southern Ross Sea more than doubled from about 235 000 to more than ... half a million. It has been suggested that predation release of Antarctic silverfish (Pleuragramma ... antarctica) due to fishing of one of its predators, Antarctic toothfish (Dissostichus mawsoni), could have ...

   Meeting Document : WG-EMM-15/53 : Auteur(s): M.H. Pinkerton, P. Lyver, D. Stevens, J. Forman, R. Eisert and S. Mormede (New Zealand).

2. Comparison of two methods to assess fish losses due to depredation by killer whales and sperm whales on demersal longline

   combination of socio-economical, ecological and conservation issues. However, estimating the amount of ... whether they depredate longline hooks separately or simultaneously, this study aimed at providing two ... indirect methods of assessment of depredated biomass over a 11-year period (from 2003 to 2013), both ... accounting for spatial variations of depredation levels. In the first method, we used fishing data from 6 525 ...

   Meeting Document : WG-FSA-14/10 : Auteur(s): N. Gasco, P. Tixier, G. Duhamel and C. Guinet (France)

3. Results of the groundfish survey carried out in CCAMLR Subarea 48.3 in January 2010

   2003/04 of a recent recruitment of evident at Shag Rocks, with presence of putative age 2+ fish (29 ... vessel. Catch-weighted length frequencies of mackerel icefish indicated that although 3+ sized fish ... mean biomass of 52,329 tonnes was estimated for mackerel icefish, with a lower 1-sided 95% CL of 24,334 ... and low availability of krill to mackerel icefish in the area (evidenced by dietary analysis) in 2009 ...

   Meeting Document : WG-FSA-10/38 : Auteur(s): R.E. Mitchell, M. Belchier, S. Gregory, L. Kenny, J. Nelson, J. Brown and L. Feathersone (UK)

4. Revised assessment models for Patagonian toothfish in research block C of Division 58.4.4, Ob & Lena Banks for the years 1989/1990 to 2012/13

   Abstract:  I made five sensitive runs of CASAL models for stock status assessments of Dissostichus ... eleginoides in research block C in Division 58.4.4 b on the assumption of constant year class strength and no ... IUU fishing occurrence in the block. The five models are as follows: 1) catch at length model as ... addition, proportion mature for ages was calculated on the assumption of logistic curve fitting for the ...

   Meeting Document : WG-SAM-14/15 : Auteur(s): K. Taki (Japan)

5. Estimating food consumption of marine predators: Antarctic fur seals and macaroni penguins

   seals and macaroni penguins at the island of South Georgia was 3•84 [coefficient of variation (CV) = 0 ... Abstract:  1. Estimating food consumption is central to defining the ecological role of marine ... , growth, diet, life history and the activity budgets of marine predators to estimate population energy ... requirements and food consumption. 2. Two species of marine predators (Antarctic fur seal Arctocephalus gazella ...

   Meeting Document : WG-EMM-02/23 : Auteur(s): I.L. Boyd (United Kingdom)

6. Glider-based estimates of Antarctic krill in Bransfield Strait, and the West shelf off Livingston Island, Antarctica

   (AMLR) Program at several temporal and spatial scales to explore the feasibility of using gliders to ... Research), equipped with a suite of oceanographic sensors (CTD, fluorometers, and oxygen) and a three ... biomass assessments of Antarctic krill (Euphausia superba) in the Bransfield Strait and the west shelf of ... from 350 glider profiles was 25.0 g m-2, compared with the mean biomass density of 28 g m-2 collected ...

   Meeting Document : WG-EMM-2019/13 : Auteur(s): C. Reiss, A. Cossio, G. Cutter, J. Walsh and G. Watters

7. IMPROVEMENT OF KRILL FISHING NOTIFICATION ACCURACY THROUGH NOTIFICATION FEES

   Abstract:  Improvement of krill fishing notification accuracy through notification fees Delegation ... of the United States The Commission adopted notification procedures for krill fishing in 2005. These ... krill fishing for the coming season. However, grossly inaccurate estimations of krill catch provided in ... valuable time is spent on analyses that are of limited use due to their inherent inaccuracies. The ...

   Meeting Document : CCAMLR-XXIX/34 : Auteur(s): Delegation of the USA

8. Seasonal and interannual variability of krill, salp and other zooplankton populations in the northwest Antarctic Peninsula region: summer 2001 in relation to the Long-Term AMLR Data Set

   , 96 stations). Krill, salps and other zooplankton were collected at each station using a 180 cm Isaacs ... assess seasonal variations in distribution, abundance and demography of Antarctic krill (Euphausia ... superba) and salps (Salpa thompsoni), and distribution and abundance of biomass dominant copepod species ... . Increased abundance relative to 1999 resulted in part from recruitment of the 1998/99 and 1999/2000 year ...

   Meeting Document : WG-EMM-01/45 : Auteur(s): V. Loeb (USA)

9. Revised research plan for the 2016/17 exploratory longline fishery of Dissostichus spp. in Subarea 48.6 by South Africa and Japan

   schedule toward the submission. We investigated the biological features of D. mawsoni in the Subarea and ... adjacent data- poor fisheries using latest Observer data. The geographical distribution of sizes, GSI and ... juveniles from around west of Prydz Bay regions are speculated to migrate to Subarea 48.6 and be important ... two areas for block 48.6_2 by latitude of 55.2°S to estimate the biomasses of D. mawsoni because the ...

   Meeting Document : WG-FSA-16/32 Rev. 1 : Auteur(s): Delegations of Japan and South Africa

10. Performance assessment of underwater setting chutes, side setting and blue-dyed bait to minimize seabird mortality in hawaii longline tuna and swordfish fisheries – Final Report August 2003

    demonstration were conducted to assess three methods’ effectiveness at avoiding incidental seabird capture ... called side setting, which entails setting gear from the side of the vessel, with other gear design the ... capture rates of treatments tested. Because side setting promises to provide a large operational benefit ... available, use of blue-dyed bait in combination with other methods, such as side setting and adequate line ...

    Meeting Document : WG-FSA-03/36 : Auteur(s): E. Gilman (USA), N. Brothers (Australia), D. Kobayashi, S. Martin, J. Cook, J. Ray, G. Ching and B. Woods (USA)

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