Resultados de la búsqueda

1. Models of tag shedding for double tagging as a function of time at liberty and approximate solutions for the single tagging model in CASAL

   Abstract:  The model of tag shedding implicit in CASAL is that of Kirkwood and Walker (KW) (1984 ... ) and Hillary et al. (2006) to apply the square of the individual tag loss annual rate in CASAL over ... a large sample of recaptures of fish released in the Heard and MacDonald Island (HIMI) (Division ... (GAM) was also fitted and is the most flexible in shape. The estimation method accounts for the fact ...

   Meeting Document : WG-SAM-11/12 : Autor(es): S.G. Candy (Australia)

2. Further development of a spatially explicit population dynamics operating model for Antarctic toothfish in the Ross Sea region

   younger fish were found predominantly in southern areas of the Ross Sea shelf, mature fish on the slope ... and spawning fish in the northern areas of the Ross Sea region. Fits to the observations were ... generally good. Further investigations are recommended in order to further validate and refine this model ... data in areas not fished to date. In addition, further external validation diagnostics need to be ...

   Meeting Document : WG-SAM-13/35 : Autor(es): S. Mormede, A. Dunn, S. Parker and S. Hanchet (New Zealand)

3. Advances are urgently needed in providing regular estimates of krill stock status based on the available data

   Abstract:  CCAMLR currently manages the krill fishery in subareas 48.1 to 48.4 using an arbitrary ... measure (the trigger level) which was established in 1991 and is “not related to the status of the krill ... -species feedback loop that is widely used in fishery management elsewhere, including in other CCAMLR ... fisheries. This feedback loop regularly modifies management measures, such as catch limits, in response to ...

   Meeting Document : WG-EMM-2019/28 : Autor(es): S. Hill, J. Hinke, N. Ratcliffe, P. Trathan and G. Watters

4. RECENT TRENDS IN NUMBERS OF CROZET SHAGS BREEDING AT THE PRINCE EDWARD ISLANDS

   decreased by more than 70% from 840 pairs in 1994/95 to 220 pairs in 2003/04 and then increased to some 500 ... pairs in 2008/09. The trends are thought to have been influenced by breeding success, which averaged ... were similar trends in numbers breeding and breeding success of gentoo penguins Pygoscelis papua, which ... doubled between the summers of 2001/02 and 2008/09. In 2008/09, some 600 pairs of Crozet shags were ...

   Meeting Document : WG-EMM-10/P2 : Autor(es): R.J.M. Crawford, P.G. Ryan, B.M. Dyer and L. Upfold

5. Information on krill in reports from the CCAMLR scheme of international observation and its utility for management

   . Few reports have been submitted each year with a maximum of eight submitted in 2005. Very little ... International Observation revealed that there are a number of inconsistencies in the information being reported ... operational procedures are reported sporadically and inconsistently. Similarly, because of the differences in ... the information reported in individual Observer’s Reports it is difficult to assess the level of by ...

   Meeting Document : WG-EMM-07/22 : Autor(es): J. Foster, S. Nicol and S. Kawaguchi (Australia)

6. Risk categorisation for Macrourus whitsoni and Amblyraja georgiana in the Ross Sea

   georgiana, which are the major bycatch species in the exploratory fishery for toothfish in the Ross Sea ... from longlines whilst still in the water and release them. Macrourus whitsoni were categorized as ... overfishing, catch rates in the toothfish fishery have not declined, juveniles are not selected by the fishery ... , and comparison of longline and trawl catch rates with other Antarctic areas suggest that population in ...

   Meeting Document : WG-FSA-05/21 : Autor(es): R.L. O’Driscoll (New Zealand)

7. Seabird by-catch in the Patagonian toothfish longline fishery at the Prince Edward Islands: 1997–1998

   Abstract:  Longline fishing for Patagonian toothfish Dissostichus eleginoides in the South African ... Exclusive Economic Zone around the Prince Edward Islands commenced in 1996. This paper summarises seabird ... is 13% more than the number of hooks reported set in 1996-97, but total effort probably declined ... during 1997-98 as a result of a decrease in the number of unsanctioned vessels operating in the area ...

   Meeting Document : WG-FSA-98/42 : Autor(es): P.G. Ryan and M.G. Purves (South Africa)

8. Identification of squid echoes in the south Atlantic

   Abstract:  During a research cruise of the British Antarctic Survey ship RRS James Clark Ross in ... February 1996, a substantial number of the ommastrephid squid, Martialia hyadesi, were caught in a pelagic ... trawl, near the Antarctic Polar Frontal Zone in CCAMLR Subarea 48.3. This paper describes acoustic data ... gathered during this haul and a survey of the immediate vicinity, in order to characterise an acoustic ...

   Meeting Document : WG-EMM-97/26 : Autor(es): Rodhouse, P., Goss, C., Brierley, A., Watkins, J.

9. Sexual ratio of Dissostichus eleginoides from longlines samples: a partial indicator of reproductive migration in Subarea 48.3

   and the third week of July 1996, in the subarea 48.3 shows that the sex ratio departs from the ... expected 1:l ratio being the females more abundant in the longline samples, except during May, when the ... bottom habitats, this finding suggests that: or the females remain in higher proportion in the habitat ... the longline fishing techniques, or both sexes rise in the water column for spawn. No one of these ...

   Meeting Document : WG-FSA-96/44 : Autor(es): Moreno, C.A., Guerra, J., Zuleta, A.

10. Food and feeding of the mackerel icefish (Champsocephalus gunnari) around South Georgia in January/February 1991

    gunnari) around South Georgia in January/February 1991 was analyzed in 3877 stomachs collected on 44 ... stations. Both, the proportion of krill (Euphausia superba) in the stomachs and the feeding intensity were ... uncommonly low in a period when energy-rich food is needed for the final maturation of the gonads. Author(s ... Georgia in January/February 1991 Approval:  Approved ...

    Meeting Document : WG-FSA-91/29 : Autor(es): K.-H. Kock (Germany), I. Everson, S. Campbell and G. Parkes (United Kingdom), D. Cielniaszek and J. Szlakowski (Poland)

Páginas