Résultats de la recherche
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A REVIEW OF THE METHODS USED TO RELEASE SKATES (RAJIIDS), WITH OR WITHOUT TAGS, IN ANTARCTIC EXPLORATORY FISHERIES
from this programme showing an unquantifiable degree of the survivorship of returned skates, the CCAMLR ... implemented was that some form of in-water release would be the ideal to improve survival chances ... . Subsequently a number of problems have become evident with this method. The Working Group on Fish Stock ... relaxation of the requirement to cut all rajids from the line on specified vessels and/or for specified time ...
Meeting Document : WG-FSA-08/30 : Auteur(s): J.M. Fenaughty (New Zealand)
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OCCURRENCE OF DWARF MINKE WHALES (BALAENOPTERA ACUTOROSTRATA SUBSP) AROUND THE ANTARCTIC PENINSULA
Abstract: The occurrence of dwarf minke whales (Balaenoptera acutorostrata subsp.) around the ... Antarctic Peninsula was examined based on 406 sightings of minke whales recorded during the Chilean ... Antarctic Scientific Expeditions and other opportunistic cetacean surveys. Identification of the species was ... made only for the whales sighted in the proximity of the vessels when the specific diagnostic ...
Meeting Document : WG-EMM-11/P2 : Auteur(s): J. Acevedo, C. Olavarría, J. Plana, A. Aguayo-Lobo, A. Larrea and L.A. Pastene
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A guide to identification of fishes caught along with the Antarctic krill
Abstract: A field key to early life stages of Antarctic fish caught along with the Antarctic ... krill is produced. The key includes 8 families and 28 species mainly from the Atlantic sector of the ... , however, it is impossible to discriminate among species of the same family by remarkable characters. A ... species key is not shown for such resemble species and a brief summary of the main morphological features ...
Meeting Document : WG-EMM-07/32 : Auteur(s): T. Iwami and M. Naganobu (Japan)
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Time series of Drake Passage Oscillation Index (DPOI) from 1952 to 2006, Antarctica
Abstract: An assessment of the environmental processes influencing variability in the recruitment ... and density of Antarctic krill (Euphausia superba DANA) is important as variability in krill stocks ... krill recruitment and density in the Antarctic Peninsula area with an environmental factor; strength of ... , between Rio Gallegos, Argentina, and Base Esperanza, at the tip of the Antarctic Peninsula during 1982 ...
Meeting Document : WG-EMM-06/13 : Auteur(s): M. Naganobu and K. Kutsuwada (Japan)
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Summary of Ross Sea skate tagging programme results
Abstract: Over 9,000 skates have been tagged and released in the Ross Sea over a period of seven ... years, and 47 (0.5%) have been recaptured. The recapture of tagged Amblyraja georgiana after up to four ... years at liberty shows that some skates survive and recover from being hauled out of depths of around ... 1,000 m and tagged. In-water tagging greatly reduces the incidence of broken jaws in skates, and ...
Meeting Document : WG-FSA-06/32 : Auteur(s): S.L. Ballara, A. Dunn and M.P. Francis (New Zealand)
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Results of the mark–recapture experiment in Subarea 48.3, 2005
– distributed over the whole of the fishable grounds in 48.3 this year. The Petersen mark-recapture estimator ... from 2004 and 2005 were very similar to each other, whichever selectivity was used: about 62,000 t of ... selectivity functions are more peaked than the Kirkwood shallow selectivity used in 2004. Estimates of ... of vulnerable biomass, resulted in consistent estimates of sustainable yield of about 4,800 t ...
Meeting Document : WG-FSA-05/17 : Auteur(s): D.J. Agnew and A. Payne (United Kingdom)
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Diet of grey-headed albatrosses at the Diego Ramírez Islands, Chile: ecological implications
Abstract: The diet of grey-headed albatrosses at Diego Ramírez, Chile, was analyzed and compared ... to that of the sympatric black-browed albatross. Diet composition was inferred from an analysis of ... . The squid Martialia hyadesi predominated in the diet samples in 2001 and 2002 (89% and 81% of ... suggests that M. hyadesi plays an important role in the breeding performance of grey-headed albatrosses at ...
Meeting Document : WG-FSA-04/12 : Auteur(s): J. Arata (Chile), G. Robertson (Australia), J. Valencia (Chile), J.C. Xavier (UK) and C.A. Moreno (Chile)
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Updated ASPM assessment of the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity
Abstract: The ASPM assessment of the Prince Edward Islands toothfish resource by Brandão and ... updated to take account of further catch, GLM standardised CPUE and catch- at-length information that have ... become available for the year 2004. Twenty year biomass projections under the assumption of various ... constant annual catches are also shown. These suggest that maintenance of the present TAC of 500 tonnes is ...
Meeting Document : WG-FSA-04/37 : Auteur(s): A. Brandão and D.S. Butterworth (South Africa)
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Age-at-length of Patagonian toothfish from the Falkland/Malvinas Islands
Abstract: To provide an age-length key for use in modelling the age structure of the Patagonian ... toothfish stock around the Falkland Islands, we used otoliths to estimate the age of a sample of 1893 ... crenellations. Two readers undertook one reading each of the sections, estimating age using criteria agreed at ... reference ages. However, the second trainee reader consistently over-estimated the age of younger fish, and ...
Meeting Document : WG-FSA-02/74 : Auteur(s): J. Ashford, A. Arkhipkin, C. Jones and S. Bobko
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Green krill, the indicator of micro- and nano-size phytoplankton availability to krill
Abstract: Size fractionated chlorophyll-a concentrations of surface seawater was measured (pico ... -, nano-, and micro-size fractions) during commercial krill operations in the waters north of the South ... Shetland Islands from late December, 1991 to mid-February, 1992. The proportion of green krill had ... the importance of micro- and nano-size phytoplanktons in terms of food source for the Antarctic krill ...
Meeting Document : WG-EMM-98/29 : Auteur(s): S. Kawaguchi, T. Ichii and M. Naganobu (Japan)