Résultats de la recherche
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Standardised CPUE analysis of the Antarctic toothfish (Dissostichus mawsoni) fishery in the Ross Sea for the years 1997/98 to 2005/06
. Hence the CPUE indices developed here are of limited use as indices of toothfish abundance at the ... ) since 1997 in CCAMLR Subareas 88.1 and 88.2. Previously, standardised analysis of toothfish CPUE (catch ... fishing years. This report revises and updates the previous analysis with the addition of data from the ... that have been in the fishery for at least 4 years. We estimate indices using both lognormal ...
Meeting Document : WG-FSA-06/47 : Auteur(s): A. Dunn and S.M. Hanchet (New Zealand)
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THE POWER OF ECOSYSTEM MONITORING
monitoring programme of the predators of Antarctic krill Euphausia superba at South Georgia together with a ... ecosystem monitoring programme, the utility of which depends upon its ability (measured by the statistical ... power to detect the effects of different levels of fishing was examined. 3. The power to detect the ... effects of fishing using either the krill population or a combined predator response index was low (20–40 ...
Meeting Document : WG-EMM-08/P11 : Auteur(s): K. Reid, J.P. Croxall and E.J. Murphy
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Revised research plan for the 2013/14 exploratory longline fishery of Dissostichus spp. in Division 58.4.3a
in the last WG-SAM meeting. We tentatively recalculated a sample size of Dissostichus spp in each ... block in such a way that the numbers of tag recoveries in the 2016 season shows an approximately 0.3 of ... coefficient variance of biomass estimate from the bootstrapped procedure, under the condition that the ... to estimate appropriate catch limit, we propose to conduct the current research operation for at ...
Meeting Document : WG-FSA-13/40 : Auteur(s): Delegation of Japan
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Foraging interactions of wandering albatrosses Diomedea exulans breeding on Marion Island with longline fisheries in the southern Indian Ocean
Abstract: Concerning numbers of Wandering Albatrosses Diomedea exulans are killed when they ... attempt to scavenge baited hooks deployed by long-line fishing vessels. We studied the foraging ecology of ... Wandering Albatrosses breeding on Marion Island in order to assess the scale of interactions with known long ... island, in warmer waters, and showed high spatial overlap with areas of intense tuna Thunnus spp. long ...
Meeting Document : WG-FSA-01/10 : Auteur(s): D.C. Nel, P.G. Ryan, J.L. Nel, N.T.W. Klages (South Africa), R.P. Wilson (Germany) and G. Robertson (Australia)
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Descriptive analysis of the Antarctic toothfish (Dissostichus mawsoni) tagging scheme in the Ross Sea for the years 1997/98 to 2003/04
Zealand vessels were unavailable at the time of the analysis. A total of 4903 Antarctic toothfish have ... released fish and minimising tagging mortality. Growth rates of Antarctic toothfish that have been at ... Abstract: A descriptive analysis of the toothfish tagging programme carried out in the Ross Sea ... two years, when tagging has been part of the Conservation Measure, New Zealand vessels have tagged ...
Meeting Document : WG-FSA-SAM-05/10 : Auteur(s): A. Dunn, S.M. Hanchet and K. Maxwell (New Zealand)
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The biology of the spiny icefish (Chaenodraco wilsoni Regan, 1914)
close to spawning. Spawning at the tip of the Antarctic Peninsula is likely to occur in October-November ... Abstract: The most abundant icefish species observed in catches off the northern tip of the ... . wilsoni has been exploited on a commercial scale from the late 1970’s to the end of the 1980’s off ... information on biological features and life history characteristics of C. wilsoni, based on research survey ...
Meeting Document : WG-FSA-07/P1 : Auteur(s): K.-H. Kock, L.V. Pshenichnov, C.D. Jones, J. Gröger and R. Riehl. (Polar Biol., 31 (3): 381–393 (2007))
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An investigation of integrated stock assessment methods for the Patagonian toothfish (Dissostichus eleginoides) in Division 58.5.2 using CASAL
the abundances of juvenile fish but adding fishery catch-at-length data, including a standardised ... . Although computer processing time is substantially increased, the inclusion of the catch-at-length and the ... primarily based on the 2005 assessment implemented in the Generalised Yield Model (GYM) using survey data of ... catch-per-unit-effort (CPUE) series. The base-case scenario was then extended to include estimates of ...
Meeting Document : WG-FSA-SAM-06/14 : Auteur(s): A. Constable, S. Candy and I. Ball (Australia)
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Modelling the impact of krill fishing on seal and penguin colonies
Abstract: A key area of concern highlighted by the Scientific Committee of the Commission for the ... Conservation of Antarctic Marine Living Resources (CCAMLR) concerns the potential overlap of the krill fishery ... with the foraging area of land-based predators such as seals and penguins in the Antarctic Peninsula ... region. The dynamics of krill in this region are strongly influenced by advective processes. A key ...
Meeting Document : WG-EMM-05/14 : Auteur(s): É.E. Plagányi and D.S. Butterworth (South Africa)
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Population and survival trends of wandering albatrosses (Diomedea exulans) breeding on Macquarie Island
last 40 years has increasingly focused on their conservation status. Demographic trends of the ... the 1980s, reaching 19 breeding pairs in the mid 1990s and the population remains at this level today ... Ocean including Marion Island, Iles Crozet and Amsterdam Island. The age distribution of the current ... breeding population also provides supporting evidence that there were periods of low juvenile survival ...
Meeting Document : WG-FSA-04/50 : Auteur(s): A. Terauds, R. Gales, R. Alderman and G.B. Baker (Australia)
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Comparative studies on the biological and acoustical properties of krill aggregations (Euphausia superba Dana) samples during the XIII Italian Expedition to the Ross Sea (December 1997–January 1998)
carried out. For all hauls both parameters: biological (length AT, sex and maturity stage of the gonads of ... aggregations MVBS at 38, 120 and 200 kHz) were examinated. Comparing the depth of the net and acoustic ... (December-January 1997-98), for biological validation of hydroacoustic recordings, 35 net samplings were ... the Euphausia superba) and acoustical (differences in volume back-scattering strength of krill ...
Meeting Document : WG-EMM-00/39 : Auteur(s): M. Azzali, J. Kalinoswki, G. Lanciani and I. Leonori (Italy)