Résultats de la recherche
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Distribution of albatrosses and petrels in the WCPFC Convention Area and overlap with WCPFC longline fishing effort
Abstract: This paper presents an analysis of the distribution of albatrosses and petrels in the ... and south of 30ºS. • WCPFC longline fisheries set approximately 100 million hooks each year north of ... significant proportion (>40%) of their time in high seas areas. Key high seas areas include the Tasman Sea ... and areas north of the Hawaiian Islands. The distribution in high seas areas emphasises the importance ...
Meeting Document : WG-FSA-06/19 : Auteur(s): C. Small (BirdLife International)
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Geographical differences in the condition, reproductive development, sex ratio, and length distribution of Antarctic toothfish (Dissostichus mawsoni) from the Ross Sea, Antarctica (CCAMLR Statistical Subarea 88.1)
differences in a number of indices from toothfish found on the Ross shelf proper, as distinct from those ... a consistent peak over all sampling seasons in comparison with the southern group in which the ... distribution was multimodal, showed a consistent and significant higher ratio of males to females, was in ... poorer condition, and was more advanced in reproductive development. Author(s): J.M. Fenaughty (New ...
Meeting Document : WG-FSA-05/52 : Auteur(s): J.M. Fenaughty (New Zealand)
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Scientific observations in CCAMLR fisheries – past, present and future
are difficult and expensive to conduct. In addition, the size of the Convention Area, its remoteness ... and prevailing inclement weather have complicated matters. Therefore, in addition to the standard ... aboard fishing vessels has assumed prominence in the collection of essential data for fisheries ... management purposes. The Scheme of International Scientific Observation, adopted by CCAMLR in 1992, is ...
Meeting Document : WG-FSA-04/64 : Auteur(s): Secretariat
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Observations of Adélie penguins in two seasons with contrasting weather and sea-ice conditions – a brief report
Abstract: The 2002-03 breeding season in comparison with 2000-01 at Edmondson Point was ... colony during December coinciding with hatching and the guard stage. The sea ice in the Ross Sea was held ... in by the presence of the large icebergs. This resulted in extensive sea ice lasting into February ... adjacent to the Edmonson Point colony. These environmental effects were accompanied by changes in CEMP ...
Meeting Document : WG-EMM-03/59 : Auteur(s): S. Olmastroni, F. Pezzo, V. Volpi and S. Focardi (Italy)
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Acoustic assessment of potential bias in abundance estimates of mackerel icefish from trawl surveys
Abstract: In 2000, CCAMLR asked the Working Group on Fish Stock Assessment (WG-FSA), whether ... that a significant proportion of the stock occurred in midwater. If this is the case, then bottom trawl ... trawl and acoustic data taken contemporaneously during a survey for mackerel icefish in the Heard Island ... region (CCAMLR division 58.5.2) in May 2000. The relationship between mackerel icefish catches and the ...
Meeting Document : WAMI-01/05 : Auteur(s): E. van Wijk, T. Pauly, A. Constable and R. Williams (Australia)
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Some comments on the procedure of krill target strength assessment in echosurveys
in echosurveys is discussed. It is known that krill abundance and biomass estimation should be ... considered as two independent tasks with different requirements to midwater trawl utilization in echosurveys ... requires another approach to echosurveys, since two actually independent task should be solved in that case ... : assessment of MSBS (MVBS) acoustic parameter distribution and krill length (weight) distribution in the study ...
Meeting Document : WG-EMM-98/21 : Auteur(s): S.M. Kasatkina (Russia)
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Estimates of sustainable yield for 50 data-poor stocks in the Pacific coast groundfish fishery management plan
in Federal fishery management plans beginning in 2011. Most species listed in the Pacific Coast ... Groundfish Fishery Management Plan have not been assessed, in large part due to data limitations. Estimates ... stock productivity. For this set of data-poor stocks, recent landings statistics reflect shifts in the ... distributions, reflecting our uncertainty in model parameters. We select median values as point estimates of OFL ...
Meeting Document : WG-SAM-11/P1 : Auteur(s): E.J. Dick and A.D. McCall
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PROPERTIES OF WATER DYNAMICS AND KRILL DISTRIBUTION IN THE SOUTH SANDWICH ISLANDS SUBAREA
Abstract: of mean krill density in Subarea 48.4 there are premises for formation of the zones ... with meanders and eddy favorable for krill concentration. Here, in the cold water of the Weddell Sea ... , the main part of biomass of Subarea 48.4, are concentrated. In January-February, 2000, almost 60% of ... fields, distributed in a rather narrow depth range,- obviously may promote above said zones, firstly ...
Meeting Document : WG-EMM-09/44 Rev. 1 : Auteur(s): S.M. Kasatkina and V.N. Shnar (Russia)
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Uncertainty in standard sphere calibrations
Abstract: In fisheries acoustics, the standard sphere method of echosounder calibration is most ... commonly used (Johannesson and Mitson, 1983; Simmonds et al., 1984). To investigate the uncertainty in the ... method, a series of experiments were conducted in a deep tank (Demer and Hewitt, 1993). Results indicated ... that variations in pulse length (0.1 and 0.3 ms), water temperature (0.5 to 5.5 C), and choice of ...
Meeting Document : WG-EMM-95/70 : Auteur(s): Demer, D.A., Hewitt, R.P.
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The incidence of plastic in the diets of Antarctic seabirds
Abstract: We investigated the diets of seabirds at sea in the Antarctic from 1976 to 1988. During ... the study period, on eight cruises in the Ross, southern Scotia, and Weddell Seas and Drake Passage ... Antarctic during the winter. Among those species that live south of the Antarctic Convergence year-round ... Antarctic, incidence of plastic in the diet decreased with increased latitude. These results indicate either ...
Meeting Document : SC-CAMLR-X/BG/18 : Auteur(s): Delegation of USA