Résultats de la recherche
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An interlaboratory comparison of ages estimated for Dissostichus eleginoides from the Argentine Sea, southwest Atlantic Ocean
otoliths could not be classified as easy to read, the clarity of their zones is quite similar in the South ... readers in the interpretation of these structures, and also difficulties reconciling the counts derived ... Abstract: To examine consistency among laboratories in age estimation of Patagonian toothfish and ... the effects on readings of different otolith processing methods, scales and otoliths were taken from ...
Meeting Document : WG-FSA-04/45 : Auteur(s): M.C. Cassia (Argentina), P.L. Horn (New Zealand) and J.R. Ashford (USA)
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An ecosystem-based approach to management: using individual behaviour to predict the indirect effects of Antarctic krill fisheries on penguin foraging
that changes in penguin foraging behaviour can be used to assess the impact of local fisheries on ... many species within the Antarctic. Despite extensive knowledge of the ecosystem that they occupy, there ... is still incomplete understanding of the links between species and the effect of environmental ... understand the interactions between penguins and krill to determine the indirect effect of krill fisheries on ...
Meeting Document : WG-EMM-03/34 : Auteur(s): S.H. Alonzo, P.V. Switzer and M. Mangel (USA)
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Fisheries risks to the population viability of black petrel (Procellaria parkinsoni)
spend an average of 1.2 y in the colony as pre-breeders, with only 3% skipping the pre-breeder phase. Of ... : periodic repeats of the transect based abundance estimation last done in 2005 (to determine whether the ... population. The mean age of first breeding for black petrel is estimated to be 6.7 y. Before this, new adults ... Abstract: Data on the main population of black petrel (Procellaria parkinsoni), which breeds on ...
Meeting Document : WG-SAM-10/P01 : Auteur(s): R.I.C.C. Francis and E.A. Bell (New Zealand)
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Estimating density and biomass of Antarctic krill (Euphausia superba) around South Shetland using the 2-dB difference method
Abstract: The distribution and abundance of krill aggregation inhabiting the Subarea 48.1, which ... includes the Elephant Island peripheries and the west and south of the South Shetland Island, were ... estimated using an acoustics survey. Acoustic data were collected with 38 and 120 kHz from April 13 to 24 in ... 2016 and 38 and 200 kHz from March 6 to 14 and 38 and 120 kHz on April 27 and May 5 in 2017. Krill were ...
Meeting Document : SG-ASAM-18/08 : Auteur(s): S. Choi, K. Lee and D. An
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Analysis of krill catch data from continuous and conventional trawls by the Saga Sea and Atlantic Navigator
Abstract: In this paper we analyse data on the distribution of catches, the size of krill and ... bycatch of larval fish taken by the Saga Sea fishing with continuous trawls in 2006, and the Atlantic ... Navigator which fished in 2005 using both continuous trawling and conventional trawling. The sizes of krill ... are few data for comparison, the bycatches of larval/juvenile fish in the continuous trawl also appear ...
Meeting Document : WG-FSA-06/57 : Auteur(s): D.J. Agnew, A. Payne, J. Hooper and J. Roe (United Kingdom)
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Evaluating the impact of multi-year research catch limits on overfished toothfish populations
Abstract: In stocks that have been depleted by overfishing, the benefits of additional fisheries ... decades to recover even in the absence of fishing, and apparently low levels of research catches can ... significantly delay the recovery of a stock. Research catches in excess of 0.6% of B0 should be avoided to ... ensure that research doesn’t significantly impact on the recovery of depleted stocks in the long term ...
Meeting Document : WG-FSA-10/42 Rev. 1 : Auteur(s): D.C. Welsford (Australia)
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Analysis of trawl data from the South Georgia krill fishery
focussed, operating in a limited area along the shelf edge on the northern coast of the island. Each day a ... large number of trawls were undertaken by each,vessel, with trawls being shorter in duration during the ... the variability are discussed in relation to the biology of krill, others are discussed in relation to ... Abstract: Data from individual trawls carried out by vessels operating in the krill fishery at ...
Meeting Document : WG-EMM-97/41 : Auteur(s): Parkes, G., Trathan, P.N., Everson, I., Murphy, E.J.
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ECOSYSTEM SERVICES OF THE SOUTHERN OCEAN
resources, and the regulation of global climate and sea level. Assessing ecological processes in terms of ... the Southern Ocean ecosystem is generally under-represented in assessments of ecosystem services at ... , status and value. The benefits of assessing Southern Ocean ecosystem services in this way include (i ... Abstract: The Southern Ocean is a globally important marine region, providing a range of ...
Meeting Document : WG-EMM-11/21 : Auteur(s): S.M. Grant, S.L. Hill and P.N. Trathan (UK)
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Testing for genetic differentiation between two size classes of the starry skate (Amblyraja georgiana)
size classes collected by Scientific Observers in the Ross Sea. We determined the DNA sequences of five ... among the samples of A. georgiana that were collected in the Ross Sea region, and the data did not ... Abstract: Two size classes of A. georgiana have been described in by-catch fishing data reported ... in the catch data from the Ross Sea fisheries. We extracted DNA from A. georgiana samples from both ...
Meeting Document : WG-FSA-12/53 : Auteur(s): P. Ritchie and A. Fleming (New Zealand)
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An initial examination of using CPUE as a fishery performance index for the krill fishery
Abstract: Early analyses of CPUE in the krill fishery concluded that it was not a useful index of ... differing relationship with the total catch in the same subarea. Comparison of the annual FPI with the krill ... difference between this overall mean and the mean for each year in which the vessel fished. An overall ... krill abundance. However, understanding the factors effecting the operation of the krill fishery and the ...
Meeting Document : WG-EMM-16/10 : Auteur(s): CCAMLR Secretariat