Resultados de la búsqueda
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Fish and squid in the diet of king penguin chicks, Aptenodytes patagonicus, during winter at sub-Antarctic Crozet Islands
of the fish diet, constituting together 32 % by mass. The three main species of myctophids eaten in ... summer by king penguins were either very rare in winter (Electrona carlsbergi) or accounted for a smaller ... other myctophids, which are rarely consumed in summer, contributed 24% of the diet by mass in winter ... Electrona subaspera = 1.0%). The greater diversity of prey in winter suggests a more opportunistic feeding ...
Meeting Document : WG-EMM-97/09 : Autor(es): Cherel, Y., Ridoux, V., Rodhouse, P.G.
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Catch per unit effort data from the early years of commercial krill fishing operations in the Atlantic sector of the Antarctic
Abstract: Catch Per Unit Effort data are presented from krill fishing operations in CCAMLR ... in single years, between years on a Subarea and Area basis, and between oceanic and shelf regions ... observed in the years 1975/76 and 1980/81, wheras the lowest CPUE occurred in Subarea 48.3 in 1977/78. The ... expressed in this regard. Depending on the circumstances a CPUE index may seriously under- or overestimate ...
Meeting Document : WG-EMM-97/22 : Autor(es): Sushin, V., Siegel, V.
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Tooth growth in male Antarctic fur seals (Arctocephalus gazella) from South Georgia: an indicator of long-term growth history
in longitudinal sections of teeth. Mean age at death was 7∙69 ± 0∙07 years and this showed a small ... provided an indication of body growth, Tooth growth rate was lowest in seals which died early (age 4 years ... ) and increased with age at death. Changes in the growth pattern of teeth suggested that fur seals which ... became sexually mature early also died early. Tooth growth layers deposited in each calendar year were ...
Meeting Document : WG-CEMP-93/11 : Autor(es): I.L. Boyd and J.P. Roberts (United Kingdom)
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Population change in gentoo penguins Pygoscelis papua at South Georgia: potential roles of adult survival, recruitment and deferred breeding
Abstract: Data on breeding population size and breeding success in gentoo penguins at Bird Island ... , South Georgia from 1977-1992 are used, in conjunction with empirical (and some hypothetical) data on ... survival and recruitment rates, to model the fluctuations in breeding populations, taking account of ... generally good agreement between observed and predicted breeding populations, except in four years, when ...
Meeting Document : WG-CEMP-93/08 : Autor(es): J.P. Croxall and P. Rothery (United Kingdom)
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Notes on the use of virtual population analysis for stock assessment of the mackerel icefish, Champsocephalus gunnari (Lönnberg, 1906) in Subarea 48.3 for the 1990/91 and 1991/92 seasons
. gunnari population in Subarea 48.3 at WG-FSA-91 using VPA, attempts were made to re-work the analysis ... , dominated in recent years by the 1987 year class (1 year olds in 1988), was quite robust, despite the use of ... various combinations of survey and cpue indices for tuning. According to the VPA the population in 1991/92 ... Falklands Protector in January 1992. Breakdown in the credibility of the VPA results in most recent years is ...
Meeting Document : WG-FSA-92/27 : Autor(es): G. Parkes (United Kingdom)
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Results of Phase I and II of the research program for toothfish fishery in Subarea 88.3 during the 2010/11–2011/12 seasons
Abstract: In 2011 and 2012 in Subarea 88.3 research fishing of toothfish has been conducted by ... Russia. In 2011 fishing was carried out by Russian longliner “Sparta” out and in 2012 it was longliner ... 2336 m. Total number of set hooks amounted 171096. In 2011 research fishing covered SSRU B, C and D ... , and in 2012 ice conditions were much worse and longlines were set only in SSRU C. Collected in ...
Meeting Document : WG-SAM-12/05 : Autor(es): A.F. Petrov, V.A. Tatarnikov, K.V. Shust, I.I. Gordeev, E.F. Kulish (Russia)
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Revised research plan for the 2013/14 exploratory longline fishery of Dissostichus spp. in Division 58.4.1
observer data. The stock size estimates for research blocks were revised following advice in the last WG ... -SAM meeting. We tentatively recalculated a sample size of Dissostichus spp in each block in such a way ... that the numbers of tag recoveries in the 2016 season shows an approximately 0.3 of coefficient ... sizes turned out to be larger in many blocks and smaller in a few blocks over the data poor-fisheries ...
Meeting Document : WG-FSA-13/38 : Autor(es): Delegation of Japan
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Assessment models for Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea for the years 1997–98 to 2010–13
model for Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea region (Subareas 88.1 and SSRUs ... selectivity for the fishery in the North. We recommend model R2 be used to provide catch limits for the stock ... biomass, in particular the data from the 2012 tagged fish. We expect this is due to higher catches in ... for recapture) than the other slope SSRUs 88.1H and I. Fish released or recaptured in SSRU K have ...
Meeting Document : WG-FSA-13/51 : Autor(es): S. Mormede, A. Dunn and S.M. Hanchet (New Zealand)
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Potential modelling structures for a two-area stock assessment model for Antarctic toothfish (Dissostichus mawsoni) in the Amundsen Sea Region
Abstract: Two-area population models for Antarctic toothfish in the Amundsen Sea Region were ... developed further as current single area models did not fully explain the patterns in the observed data on ... , these models were limited to data collected in SSRU 88.2H as there were few data available to inform ... estimation of biomass in SSRUs 88.2C–G. Additional data resulting from a two-year research plan implemented ...
Meeting Document : WG-SAM-15/49 : Autor(es): S. Mormede, S.J. Parker, A. Dunn and S.M. Hanchet (New Zealand)
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Matlab code for calculating krill biomass in a survey area
Abstract: In 2010, CCAMLR tasked the Subgroup on Acoustic Survey and Analysis Methods (SG-ASAM ... ) to recalculate the catch limit for Antarctic krill in the Scotia Sea based on updated acoustic ... algorithms developed since the first calculation in 2000. Subsequent to the 2010 SG-ASAM, code used to obtain ... collection of code has revealed inconsistencies and omissions in the documentation, complicating attempts by ...
Meeting Document : SG-ASAM-16/03 : Autor(es): A. Cossio, J. Renfree and C. Reiss