Résultats de la recherche
-
Preliminary information on inshore demersal fish from the Danco Coast, Antarctic Peninsula, in the 1999/00 summer season
Abstract: A total of 1103 inshore notothenioid fish were caught by means of trammel-nets in four ... ), Danco Coast, West Antarctic Peninsula, in the summer season of 2000. The families Nototheniidae ... . Gobionotothen gibberifrons and Trematomus newnesi followed in importance. In general, the ichthyofauna agreed in ... occurrence of G. gibberifrons in the Danco Coast. This supports the hypothesis that the commercial fishery ...
Meeting Document : WG-FSA-00/63 : Auteur(s): R. Casaux, E. Barrera-Oro, A. Baroni and A. Ramón
-
Entanglement of Antarctic fur seals Arctocephalus gazella in man made debris at Bird Island, South Georgia during the 1997 winter and 1997/98 pup-rearing season
. Only seven seals were observed entangled in the winter, a drop of 59% from 1996. Four of these records ... were from adult females, a much higher proportion than in previous years. The number of entanglements ... in the summer was the lowest recorded to date, being 52% lower than in 1996/97. The percentage of ... entanglements in packaging bands was higher than recent years in both summer and winter. Only one seal sustained ...
Meeting Document : SC-CAMLR-XVII/BG/11 : Auteur(s): Delegation of the United Kingdom
-
Results of E.L. Holmberg 1995 fish survey in Subarea 48.3
Abstract: The survey comprised 48 bottom trawl hauls taken in subarea 48.3. About 80% of the ... hauls were intended as replicates of the position of hauls in the 1994 survey, allowing site by site ... and 1.0 miles from those in the previous survey. Mean densities were obtained considering the spatial ... aggregation of stations in a nested ANOVA model. An increase over last year's values was observed in the ...
Meeting Document : WG-FSA-95/35 : Auteur(s): Marschoff, E., Madirolas, A., Balestrini, C., Tossonotto, G., Gonzalez, B., Calcagno, J.
-
INDICATIVE ESTIMATES OF BIOMASS AND YIELD OF WHITSON’S GRENADIER (M. WHITSONI) ON THE CONTINENTAL SLOPE OF THE ROSS SEA IN SUBAREAS 88.1 AND 88.2
Abstract: Catch limits currently in place for macrourids in Subareas 88.1 and 88.2 are defined as ... being equal to 16% of the catch limit of Dissostichusspp. in these subareas. The 16% was based on the ... ratio of the by-catch limit for macrourids to the catch limit for Dissostichus spp. in Division 58.5.2 ... in 2002/03 (CCAMLR-XXI, para 11.53). The bycatch limit for macrourids in Division 58.5.2 had in turn ...
Meeting Document : WG-FSA-08/32 : Auteur(s): S.M. Hanchet, D. Fu and A. Dunn (New Zealand)
-
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 : Auteur(s): Cherel, Y., Ridoux, V., Rodhouse, P.G.
-
Milk fatty acid signatures indicate both major and minor shifts in foraging ecology of lactating Antarctic fur seals
fatty acids in the marine food chain and it may be useful in determining the composition of seal diets ... or in detecting changes in diets. We apply fatty acid signature analysis to milks collected from ... ), mid (n=11), and late (n=8) foraging trip intervals, and demonstrate its use in detecting shifts in ... prey intake which correspond with changes observed in diving and foraging behavior during a poor food ...
Meeting Document : WG-EMM-97/14 : Auteur(s): Boyd, I.L., Iverson, S.J., Arnould, J.P.Y.
-
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 : Auteur(s): Sushin, V., Siegel, V.
-
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 : Auteur(s): I.L. Boyd and J.P. Roberts (United Kingdom)
-
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 : Auteur(s): J.P. Croxall and P. Rothery (United Kingdom)
-
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 : Auteur(s): G. Parkes (United Kingdom)