Resultados de la búsqueda
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Geographical aspects of utilising resources of krill (Euphausia superba)
Abstract: This paper presents data on the distribution of E. superba in the Atlantic sector and ... . In a number of subregions on the periphery of the Weddell Gyre (both to the north and south), as well ... as in the coastal waters of the Antarctic continent, the formation of krill aggregations is variable ... in terms of location of individual aggregations. The main difficulty with starting up a fishery there ...
Meeting Document : WG-EMM-96/05 : Autor(es): Makarov, R.R.
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Review of some assumptions for modelling Patagonian toothfish dynamics at CCAMLR Subarea 48.3
Patagonian toothfish stock in CCAMLR Subarea 48.3 were available to the Working Group: CASAL and ASPM (WG-FSA ... -05/16; WG-FSA-05/73). Although the underlying basic age-structure population dynamics models in both ... cases were similar, there were considerable differences in assumptions and implementations of the two ... methods. In this paper, we discuss the related effects considering constant h parameter and deterministic ...
Meeting Document : WG-FSA-SAM-06/13 : Autor(es): A. Aubone, P.A. Martínez and O.C. Wöhler (Argentina)
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Proposal of the Russian Federation to open Subarea 88.3 for exploratory fishery of Dissostichus spp.
Abstract: In 2011 and 2012 in Subarea 88.3 research fishing for toothfish has been conducted by ... Russia. In 2011 fishing was carried out by Russian longliner “Sparta” out and in 2012 it was longliner ... . Collected in research fishing data contributes to the achievement of the main objectives of research for the ... of hypotheses about the ratio of fish in the area and the total stock as well as studying of ...
Meeting Document : WG-FSA-13/12 : Autor(es): Delegation of the Russian Federation
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Population of macaroni penguins Eudyptes chrysolophus at Marion Island, 1994/95 to 2002/03, with information on breeding and diet
from about 405 000 pairs in 1983/84 and 434 000 pairs in 1994/95 to about 356 000 pairs in 2002/03. Two ... demonstration of a significant decrease in the overall population. Numbers of occupied nests at other colonies ... decreased from 79 000 in 1994/95 to 31 000 in 2002/03. At three small colonies there was a significant ... . However, during this period there was a significant increase in reproductive success with time. In the ...
Meeting Document : WG-EMM-03/15 : Autor(es): R.J.M. Crawford, J. Cooper and B.M. Dyer (South Africa)
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Population, breeding, diet and conservation of Crozet shag Phalacrocorax [atriceps] melanogenis at Marion Island, 1994/95 to 2002/03
at subantarctic Marion Island decreased by 68% from 841 pairs in 1994/95 to 272 pairs in 2002/03. The ... birds breeding in any given season. The decreases coincided with a period of warming and reduced ... precipitation at Marion Island and with a decrease in the number of gentoo penguins Pygoscelis papua breeding ... there. Both these seabird species forage inshore and there is considerable overlap in their diets ...
Meeting Document : WG-EMM-03/17 : Autor(es): R.J.M. Crawford, J. Cooper, B.M. Dyer, A.C. Wolfaardt, D. Tshingana, K. Spencer, S.L. Petersen, J.L. Nel, D.G. Keith, C.L. Holness, B. Hanise, M.D. Greyling and M. du Toit (South Africa)
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On influence of acoustic survey methodology improvement on krill biomass estimation. (A comparison of results of acoustic surveys based on single-frequency and double-frequency algorithms)
Abstract: Substantial improvements in data collection and analytical methodologies of acoustic ... influence of such improvements on krill biomass estimation. The letter seems to become useful in comparative ... algorithms that were obtained by processing data on Russian R/V ATLANTIDA surveying in 48.4 Subarea according ... difference in krill biomass estimates. A difference was more than 1.8 times in the case under consideration ...
Meeting Document : WG-EMM-01/41 : Autor(es): S.M. Kasatkina and A.P. Malyshko (Russia)
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Preliminary results on by-catch of fishes caught by the fishery vessel Chiyo Maru No. 3 to the north of the South Shetland Islands (February to March, 1996)
in 41 hauls. Notothenioid juveniles were found in 30 hauls carried out in waters with a depth of 87 ... in 11 hauls operated at some distance from the shelf, in the offshore waters with a depth of 275 ... -1780m (average 1006m). Notothenioid juveniles never caught with bathypelagic fish species in all hauls ... found in 15 hauls, and its estimated value of an arithmetic mean was 4±19 ind./t (0 to 140 ind./t) of ...
Meeting Document : WG-EMM-96/52 : Autor(es): Ichii, T., Kawaguchi, S., Naganobu, M.
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A simulation study of krill fishing by an individual Japanese trawler
, and their performance investigated in response to six different ways in which the overall krill ... biomass in a 600 n. mile square oceanic sector might decline by 50%. In most cases there is essentially no ... response of the index, or a response rather smaller in relative magnitude than the biomass decline. Catch ... statistics collected at present (centred primarily on catch per fishing time) are of low utility in detecting ...
Meeting Document : SC-CAMLR-VI/BG/38 : Autor(es): D.S. Butterworth (United Kingdom)
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Linking predator and prey behaviour: contrasts between Antarctic fur seals and macaroni penguins at South Georgia
are the two main land-based krill Euphausia superba consumers in the northern Scotia Sea. Using a ... -based (animal tracking and diet analysis) techniques, we examined variability in the foraging ecology of ... from acoustic surveys was low during summer, increasing in autumn. During the breeding season, krill ... occurred in 80% of fur seal diet samples, with fish remains in 37% of samples. Penguin diets contained the ...
Meeting Document : WG-EMM-10/P07 : Autor(es): C.M. Waluda, M.A. Collins, A.D. Black, I.J. Staniland and P.N. Trathan
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Diet variability and reproductive performance of macaroni penguins (Eudyptes chrysolophus) at Bird Island, South Georgia
(Euphausia superba) was the main prey in 17 out of 22 years. Amphipods (Themisto gaudichaudii) were the main ... prey in 1994 and 2009, fish in 2004, and euphausiids other than E. superba (Thysanoessa spp. and E ... . frigida) in 2000. There was no clearly dominant prey group in 1999. The five-year average proportion of E ... frequency occurrence of T. gaudichaudii both increased with a decreasing proportion of E. superba in the ...
Meeting Document : WG-EMM-12/17 : Autor(es): C.M. Waluda, S.L. Hill, H.J. Peat and P.N. Trathan (United Kingdom)