Résultats de la recherche
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Net sample validation of acoustic techniques used to identify and size Antarctic krill
species groups has been attempted using differences in echo strength at two acoustic frequencies (ΔMVBS ... ). Here we compare net and acoustic data from 2 cruises around South Georgia in 1996 in order to assess ... echo-charts were also identified as krill on the basis of their difference in backscatter at 38 and 120 ... frequency data and compared with that obtained in net hauls. This comparison revealed that a simplified bent ...
Meeting Document : WG-EMM-97/46 : Auteur(s): Watkins, J.L., Brierley, A.S.
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Trophic relations of the cephalopod Martialia hyadesi (Teuthoidea: Ommastrephidae) at the Antarctic Polar Front, Scotia Sea
Sea in February 1989. The dissected stomachs of 61 specimens were classified according to fullness and ... items in the squid's diet were the myctophid fishes Krefftichthys anderssoni and Electrona ... squid mantle length. Over the size range of squid in the sample there was no relationship between size ... preference was related to squid size. The prevalence of copepod-feeding myctophids in the diet of this squid ...
Meeting Document : SC-CAMLR-XI/BG/11 : Auteur(s): Delegation of United Kingdom
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Quantitative stock survey and some biological and morphometric characteristics of the deep-sea red crab Geryon quinquedens off south west Africa
Abstract: In order to assess the abundance of the red crab Geryon quinquedens, two otter-trawl ... cruises were undertaken in July and September 1978, on the continental slope off South West Africa. A ... width, whereas the mode for males was at 11.2 cm. In general. larger animals tended to inhabit shallower ... states indicated that males were predominantly in the inter-moult stage while most females were either ...
Meeting Document : WS-CRAB-93/22 : Auteur(s): C.J. De B. Beyers and C.G. Wilke (South Africa)
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The diet of Antarctic fur seals Arctocephalus gazella during the breeding season at Heard Island
Heard Island fed mainly on fish with an average 95.2% of scats in monthly collections containing fish ... and skate (Bathyraja sp.), the latter being found in over 60%-of scats in October and November. The ... . There the increase is thought to be due to the high availability of krill E. superba, but, in the ... on Heard Island grounds must be considered in this light. Author(s): Delegation of Australia Title ...
Meeting Document : SC-CAMLR-VIII/BG/53 : Auteur(s): Delegation of Australia
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An initial examination of using CPUE as a fishery performance index for the krill fishery
difference between this overall mean and the mean for each year in which the vessel fished. An overall ... Abstract: Early analyses of CPUE in the krill fishery concluded that it was not a useful index of ... extent to which these reflect changes in krill abundance are key elements of developing feedback ... period 2001 – 2016 (up to 26/5/2016) in Subareas 48.1, 48.2 and 48.3 to determine whether CPUE might be ...
Meeting Document : WG-EMM-16/10 : Auteur(s): CCAMLR Secretariat
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Can the chemistry of otolith nuclei determine population structure of Patagonian toothfish Dissostichus eleginoides?
to South Georgia in the Southern Ocean. Concentrations of 55Mn, 88Sr, and 137Ba, ratioed to 42Ca ... , showed a sharp population boundary in the vicinity of the Polar Front, between South Georgia and the ... population structure in Patagonian toothfish, demonstrating that otolith nucleus chemistry can discriminate ... between populations even in fully marine environments. Moreover, the nucleus chemistry indicated ...
Meeting Document : WG-FSA-06/P2 : Auteur(s): Ashford, J.R., A.I. Arkhipkin and C.M. Jones
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Proposal to standardise the submission of meeting documents to working groups
Committee, WG-EMM and WG-FSA (including ad hoc WG-IMAF). In the Secretariat’s view, the guidelines would ... benefit from some standardisation of the Working Group-specific differences in relation to: submission ... in preparing information and documents for meetings. The Secretariat plans to submit a similar ... proposal to WG-FSA for consideration at its meeting in 2005. Author(s): Secretariat Title: Proposal to ...
Meeting Document : WG-EMM-05/10 : Auteur(s): Secretariat
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Fishing patterns of Japanese krill trawlers
strategies, especially focusing on their movement in time and space. The operations were grouped into ... , 30nm, and 60nm). Distribution of the operation units showed considerable variation in space and time ... expressing the status of krill in the fishing ground. Catch per fishing days maybe the reasonable index for ... expressing the status of krill in the fishing ground. Author(s): S. Kawaguchi, T. Kameda and Y. Takeuchi ...
Meeting Document : WG-EMM-02/28 Rev. 1 : Auteur(s): S. Kawaguchi, T. Kameda and Y. Takeuchi (Japan)
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Population dynamics of the wandering albatross (Diomedea exulans) on Macquarie Island and the effects of mortality from longline fishing
increased from 17 in 1956 to a maximum of 97 in 1966, and then declined at an average rate of 8.1% per year ... emigration). The decline is correlated with the onset of large-scale fishing for tuna in the southern ... albatross is estimated. An annual number of longline hooks in the southern hemisphere tuna fishery of 41.6 ...
Meeting Document : WG-IMALF-94/07 : Auteur(s): William K. de la Mare and Knowles R. Kerry (Australia)
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A draft MPA Report for the East Antarctica Planning Domain
guidelines adopted by SC-CAMLR in 2012. This report provides a synthesis of the scientific information ... ) description of the planning domain, (2) identification of MPA locations in the planning domain, (3) four ... highlighted areas for inclusion in EARSMPA, (4) historical activities, (5) assessment of the MPA(s) and the ... effects of activities, (6) assessment and management of threats, (7) limits on activities permitted in the ...
Meeting Document : WG-EMM-14/48 : Auteur(s): A. Constable (Australia), P. Koubbi (France), J. Melbourne-Thomas, M. Sumner, S. Jacob and M. Guest (Australia)