Resultados de la búsqueda
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Standardised CPUE analysis of the Antarctic toothfish fishery in CCAMLR Subarea 88.1 from 1988/89 to 2003/04
to 2004, in Subareas 88.1 and 88.2. A preliminary standardised analysis of toothfish CPUE (catch (kg ... ) per baited hook per set) carried out in 2003 compared two alternative toothfish CPUE analyses for the ... vessels that have been in the fishery over the entire time period. However, the fishing grounds were ... similar and all explained a reasonable amount (35-46%) of the variation. The variables included in the ...
Meeting Document : WG-FSA-04/25 : Autor(es): N.L. Phillips, R.G. Blackwell and S.M. Hanchet (New Zealand)
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Principles for evaluating data collection plans in data-poor exploratory fisheries
in accordance with the principles set forth in Article II of the Convention. However, several times ... over the last five years the Scientific Committee has noted with concern the lack of progress in ... developing robust assessments of status of Dissostichus spp. in exploratory fisheries. Each additional year ... of fishing increases the risk of over-exploitation of fish stocks. In this paper we articulate a set ...
Meeting Document : WG-SAM-11/08 : Autor(es): P.E. Ziegler, D.C. Welsford and A.J. Constable (Australia)
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Comparison of 1981 FIBEX survey and 2000 CCAMLR survey on oceanographic variability in the Scotia Sea, Antarctica
) in order to investigate differences of oceanographic structures in the same area and summer season ... between the 1981 FIBEX survey and 2000 CCAMLR survey in the Scotia Sea, Antarctica. As a result, the ... distribution range of the cold Antarctic Surface Water less than 0°C in the 1981 FIBEX survey is clearly larger ... than the 2000 CCAMLR survey. In other words, the differences of the both surveys suggested that the ...
Meeting Document : WG-EMM-04/45 : Autor(es): M. Naganobu and Y. Yoda (Japan)
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Distribution, biological characteristics and biomass of mackerel icefish based on the results of the trawling survey carried out at RV Atlantida in February 2000
by Russia at R/V Atlantida in February 2000 in Subarea 48.3 are presented. During that period ... C.gunnari were feeding. In all parts of the Subarea, except the North-Western one, C. gunnari of 22-28 cm in ... coefficient. The objective evidences are submitted to prove that a certain part of C.gunnari stock may stay in ... the pelagic layer in the feeding period. Therefore, the bottom survey estimates only the population ...
Meeting Document : WG-FSA-00/51 : Autor(es): Zh.A. Frolkina and P.S. Gasiukov (Russia)
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Variation in standing stock of the mackerel icefish Champsocephalus gunnari at South Georgia
Abstract: 1. Bottom trawl surveys on the South Georgia shelf indicate episodic declines in the ... commercial fishing. 2. The greatest effect has been observed in years when krill are known to have been ... that predation by fur seals is likely to play a major role in the observed changes in C. gunnari ... abundance. 5. Periodic shifts in food chain relationships, involving krill, C. gunnari and fur seals, are ...
Meeting Document : WG-FSA-99/63 : Autor(es): I. Everson, G. Parkes (United Kingdom), K.-H. Kock (Germany) and I. Boyd (United Kingdom)
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Pursuit and polynyas in the Ross Sea, Antarctica
influence biological activity. We pursued daily transition of polynyas in the Ross Sea, Antarctica from 1978 ... polynya existed in the inner area of the Ross Sea in November of the each year. The shape of the polynya ... changed remarkably in several days. The polynyas have the range of approximately 500 km from the bottom to ... the entrance of the Ross Sea. The polynyas usually open to the northern oceanic water late in December ...
Meeting Document : WG-EMM-98/31 : Autor(es): M. Naganobu, T. Tanaka, Y. Okada, N. Kimura and S. Matsumura (Japan)
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RESEARCH PLAN FOR TOOTHFISH BY SHINSEI MARU NO. 3 IN 2008/09
Abstract: A proposal to undertake scientific research in CCAMLR Subarea 58.4.4 over the 2008-2009 ... No.3, in 07/08 season covering the whole SSRUs (Small Scale Research Units). In the course of this ... the single year survey is not be sufficient in order to quantitatively assess the stock abundance and ... to continue the scientific research to accumulate scientific information on toothfish in this area ...
Meeting Document : WG-FSA-08/39 : Autor(es): Delegation of Japan
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Flexible foraging strategies of gentoo penguins help buffer the impacts of inter-annual changes in prey availability
Abstract: Gentoo penguins Pygoscelis papua show considerable plasticity in their diet, diving and ... single site, since flexible foraging habits would provide a buffer against changes in prey availability ... . We examined inter-annual changes in the foraging strategies and diet of gentoo penguins in the South ... varied over time; different dive depth-distributions were observed in each year. Nonetheless, chick ...
Meeting Document : WG-EMM-08/50 : Autor(es): A.K. Miller and W.Z. Trivelpiece (USA)
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Validation of age determination in Notothenia coriiceps, by means of a tag-recapture experiment at potter cover, South Shetland Islands
Shetland Islands, in successive years from 1989 to 1992, 9 were recaptured at the same site after periods ... of 11-21 months. A comparison was carried out between the annuli found in scales removed before and ... after the period of liberty. In scales of those specimens recovered after 11-13 months, one extra ... annulus was laid down. The same analysis in one individual recovered after 21 months resulted in 2 extra ...
Meeting Document : WG-FSA-94/12 : Autor(es): E.R. Barrera-Oro and R.J. Casaux (Argentina)
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A preliminary assessment of mackerel icefish (Champsocephalus gunnari) in Division 58.5.2, based on recent survey results
Abstract: The annual Random Stratified Trawl Survey was undertaken in Division 58.5.2 in the ... ’ E using standard CCAMLR methods. A pattern of 5 year classes being present simultaneously in the ... population, which was first detected in 2011, has persisted, however a large cohort of fish, estimated to be ... 2+, dominate the population in both abundance and biomass. A new length weight model is estimated ...
Meeting Document : WG-FSA-12/26 : Autor(es): D.C. Welsford (Australia)