Résultats de la recherche
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Method of age determination for Antarctic toothfish (Dissostichus mawsoni)
. All in all 6009 specimens of toothfish were aged using the same above described method. Otoliths were ... Abstract: This work is based on material from Antarctic toothfish, collected in the Ross Sea from ... widely applicable "the break and burn method" was used in the present work (Chilton, Beamish ... December 2004 to March 2005 on the longliner “Volna”. Age was determined for 364 individuals. Currently ...
Meeting Document : WG-SAM-12/18 : Auteur(s): E.N. Kyznetsova, A.F. Petrov and V.A. Bizikov (Russia)
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Estimates of natural and fishing mortality from toothfish mark–recapture and catch-at-age data at South Georgia
mark-recapture models of this type. Given the increasing number of releases and recaptures in all the ... data from all the analysed cohorts in the estimation routine, and we examine the potential estimation ... bias, using simulated data. The results confirm earlier findings, with lower estimates of natural and ... estimates of the exploitation rate predicted by the full assessment models, currently being implemented ...
Meeting Document : WG-FSA-06/54 : Auteur(s): R.M. Hillary and D.J. Agnew (United Kingdom)
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OCEANIC CIRCUMPOLAR HABITATS OF ANTARCTIC KRILL
inner shelf whereas in the Indian-Pacific sectors krill prevail in the ocean within 200-300 km of the ... ACC as the season progressed. The retention of krill in moderately productive oceanic habitats is a ... , with 70% of the total stock concentrated between 0o and 90oW. Within this Atlantic sector, krill are ... shelf break. Overall, 87% of the total stock live over deep oceanic water (>2000 m) and krill occupy ...
Meeting Document : WG-EMM-08/P04 - Abstract : Auteur(s): A. Atkinson, V. Siegel, E. A. Pakhomov, P. Rothery, V. Loeb, R.M. Ross, L.B. Quetin, K. Schmidt, P. Fretwell, E.J. Murphy, G.A. Tarling and A.H. Fleming
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SUMMER SURVEY OF FUR SEALS AT PRINCE EDWARD ISLAND, SOUTHERN INDIAN OCEAN
9.3% per year between 1987/1988 and 2001/2002, and the population is in the mature phase of population ... Abstract: The onshore distributions and the abundances of Antarctic fur seals Arctocephalus ... December 2008. This repeats a survey conducted in December 2001 and extends the area surveyed to include ... the entire south-west coast of Prince Edward Island. Of the two colonies of Antarctic fur seals, the ...
Meeting Document : WG-EMM-10/P15 : Auteur(s): M.N. Bester, P.G. Ryan and J. Visagie
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Preliminary announcement of ‘Workshop on Krill Culturing Techniques’
techniques’ at Port of Nagoya Public Aquarium, Japan, in September 2002. Port of Nagoya Public Aquarium ... condition. Several research groups in the world are also independently developing their culturing techniques ... . Developing techniques of culturing krill in large number is thought to be a major break through for further ... methodology. The aim of the workshop is to share the knowledge to date about the methodology of krill ...
Meeting Document : WG-EMM-01/37 : Auteur(s): Delegation of Japan
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New Zealand Draft National Plan of Action – Seabirds
National Plan of Action – Seabirds. The plan will apply to commercial and non- commercial fishing in New ... vessels participate. The plan proposes that Codes of Practice be developed for each fishery, and that the ... mandatory if not adhered to voluntarily in Codes of Practice. Economic incentives or penalties may also be ... developed if required. The New Zealand government will make final decisions on the plan in November 2003 ...
Meeting Document : WG-FSA-03/41 : Auteur(s): J. Nicolson and D. Randall (New Zealand)
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Note on demography of Antarctic seabirds
, 1982). The most important subsequent demographic studies are referenced in the recent report of the ... initial step, this paper attaches a tabulated review of most of the relevant data up to 1981 (Croxall ... proceed in respect of such data. Author(s): J.P. Croxall (United Kingdom) Title: Note on demography of ... Abstract: At last year’s meetings WG-EMM and Scientific Committee expressed an interest in ...
Meeting Document : WG-EMM-01/55 : Auteur(s): J.P. Croxall (United Kingdom)
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Age-at-length of Patagonian toothfish from South Georgia
Abstract: To provide an age-length key for use in modelling the age structure of the Patagonian ... fisheries survey in 2000, estimates of the Von Bertalanffy parameters were L8 = 123.8, K = 0.10 and t0 =-2.1 ... toothfish stock around South Georgia, we used otoliths to estimate the age of a sample of 264 Patagonian ... toothfish (Dissostichus eleginoides) captured in the longline fishery. We used a thin section grinding ...
Meeting Document : WG-FSA-02/75 : Auteur(s): J. Ashford, M. Belchier, C. Jones and S. Bobko
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Winter and summer foraging location of Adélie penguins from Mawson, Davis and Casey
foraging locations is relevant to WG-EMM in terms of understanding the spatial and temporal scales of ... influence on CEMP parameters as well as the management of the Southern Ocean marine living resources in ... with a diet which is largely comprised of the fishery target species Antarctic krill (Euphausia superba ... , the birds foraged within several hundred kilometres of their breeding colonies, and at times, they ...
Meeting Document : WG-EMM-13/08 : Auteur(s): L. Emmerson, N. Kokubun and C. Southwell (Australia)
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Behaviour of Dissostichus eleginoides fitted with archival tags at Heard Island: preliminary results
Abstract: Thirty nine Dissostichus eleginoides were released in the vicinity of Heard Island ... carrying archival tags in April 2002. Since then seven have been recaptured and the depth and temperature ... data they recorded is analysed here. Most of the fish had periods of active vertical movement ... alternating with periods of relative inactivity, loosely correlated with moon phase. The direction of vertical ...
Meeting Document : WG-FSA-02/60 : Auteur(s): R. Williams and T. Lamb (Australia)