Résultats de la recherche

1. An index of per capita recruitment

   Abstract:  An index of per capita recruitment (PCR) is proposed such that Ri PCRy–1 = R1y/(1–R1y ... )eM where R1 is the proportion of age-1 animals sampled in year y and M is the post-recruit mortality ... rate. The intent of the index is to facilitate investigation of reproductive success and the factors ... postulated to affect it. The formulation of PCR is based on the assumptions that: 1) post-recruit mortality ...

   Meeting Document : WG-EMM-99/50 : Auteur(s): R. Hewitt (USA)

2. Seabird mortality on longlines in Australian waters: a case study of progress and policy

   Abstract:  Seabird bycatch arising from longline fishing is known to kill tens of thousands of ... , particularly albatrosses, causing widespread declines in populations across the world. However the extent of ... seabird mortality is poorly known for most of the world's longline fisheries. Information on bird ... evolution of the seabird bycatch issue in the Australian Fishing Zone (AFZ), where the magnitude of the ...

   Meeting Document : WG-FSA-98/29 : Auteur(s): R. Gales, N. Brothers, T. Reid, D. Pemberton and G.B. Baker (Australia)

3. About the fecundity of Patagonian toothfish (Dissostichus eleginoides) in Subarea 48.3 (around South Georgia)

   Abstract:  The absolute and relative fecundity of Patagonian toothfish inhabiting areas of South ... Georgia Island and Shag Rocks were studied. The absolute individual fecundity of toothfish in relation to ... the size of specimens ranged from 56,3 to 567.5 thousands of eggs, averaging 152,9 thousands of eggs ... . Values of relative individual fecundity of toothfish varied from 4,1 to 13,0 thousands of eggs (averaging ...

   Meeting Document : WG-FSA-98/13 : Auteur(s): M.M. Nevinsky and A.N. Kozlov (Russia)

4. Developing research on Antarctic krill to facilitate the development and updating of feedback management procedures

   Abstract:  Antarctic krill fisheries have the potential to be in the top 10 fisheries of the world ... in terms of biomass production. The expansion of the fishery from current levels appears inevitable ... developing a feedback management procedure for these fisheries. Implementation of such a feedback management ... approach requires an appropriate level of understanding of (i) the structure, function and change of the ...

   Meeting Document : WG-EMM-13/12 : Auteur(s): E.J. Murphy, R.D. Cavanagh (United Kingdom), A. Constable (Australia), E.H. Hofmann (USA), S.L. Hill, N.M. Johnston, P.N. Trathan and J.L. Watkins (United Kingdom)

5. Lipid metabolism features of Antarctic toothfish Dissostichus mawsoni (Nototheniidae)

   Abstract:  Lipid metabolism and indices of oxidation processes obtained during examination of ... specimens of Antarctic toothfish Dissostichus mawsoni (Perciformes: Nototheniidae) caught in the Ross Sea ... are given. Blood plasma, tissues mesonephric kidney, liver and spleen were studied for the content of ... total lipids and lipid composition, products of lipid peroxidation and level of antioxidant protection ...

   Meeting Document : WG-FSA-16/P02 : Auteur(s): I.I. Gordeev, D.V. Mikryakov, N.I. Silkina and A.S. Sokolova

6. Proposal for a SCOR Working Group to identify Ecosystem Essential Ocean Variables for measuring change in the biological properties of marine ecosystems

   for measuring change in the biological properties of marine ecosystems” was developed by members of ... amongst members of the Science Steering Committee of the IMBER program, Integrating Climate and Ecosystem ... Dynamics (ICED) as part of the development of the ICED Southern Ocean Sentinel.  The aim of the Working ... Group is to develop a set of essential variables for monitoring that would contribute to assessments of ...

   Meeting Document : WG-EMM-12/45 : Auteur(s): A. Constable (Australia)

7. Preliminary assessment of mackerel icefish, Champsocephalus gunnari, on the Heard Island Plateau (Division 58.5.2) based on a survey in April–May 2003

   Abstract:  A preliminary assessment of yield of Champsocephalus gunnari for Heard Island Plateau ... (Division 58.5.2) was undertaken using the standard CCAMLR methods, based on the result of a randomly ... stratified trawl survey completed between 16 April and 10 May 2003. The 2003 estimate of abundance was ... approximately 20% of the 2002 estimate. This decline in abundance is consistent with the passage of the strong ...

   Meeting Document : WG-FSA-03/32 : Auteur(s): A.J. Constable, C.R. Davies, R. Williams and T. Lamb (Australia)

8. A RISK MANAGEMENT FRAMEWORK FOR AVOIDING SIGNIFICANT ADVERSE IMPACTS OF BOTTOM FISHING GEAR ON VULNERABLE MARINE ECOSYSTEMS

   adverse impacts of bottom fishing gear on Vulnerable Marine Ecosystems (VMEs) are avoided. Due to the high ... levels of uncertainty surrounding both the evidence of VME presence and the consequences of interaction ... with different types of gear, a risk management framework is proposed, similar to that which has been ... used successfully by IMAF to minimise the effects of longline fishing mortality on seabirds. The aim of ...

   Meeting Document : WG-FSA-08/64 : Auteur(s): K. Martin-Smith (Australia)

9. Report on incidental bird mortality and effectiveness of mitigation measures during demersal long lining by Ihn Sung 66 in Subarea 48.3 - December 1993 to February 1994

   Abstract:  A method of surveying incidental mortality of seabirds during longlining operations and ... the effectiveness of mitigation measures is described. An alternative design of streamer line for use ... with the 'Spanish' method of longlining (separate hauling and fishing lines) is described ... . The results of observations of incidental mortality of seabirds made during the fishing operations of ...

   Meeting Document : WG-IMALF-94/14 : Auteur(s): C. Jones and G. Parkes (United Kingdom)

10. Estimating fishing gear selectivity for trawlers using length-frequency data from concurrent commercial trawl and longline fishing for Patagonian toothfish in Division 58.5.2 and the ratio of their hazard functions

    Abstract:  The upper-arm of the length-dependent fishing selectivity function for trawlers fishing ... for Patagonian toothfish around Heard Island (Division 58.5.2) was modelled as the exponential of a ... from commercial operations of each of trawlers and longliners fishing concurrently for 3 seasons ... assuming that, for the upper range of lengths, fish are fully selected by longliners but not by trawlers ...

    Meeting Document : WG-FSA-06/35 : Auteur(s): S.G. Candy (Australia)

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