Search results
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Foraging partitioning between giant petrels Macronectes spp. and its relationship with breeding population changes at Bird Island, South Georgia
females in both species. Sex differences agree with previous observations on diet and on attendance at ... may be reduced by the limited overlap in the activity range, with southern giant petrels foraging ... further south than northern giant petrels, suggesting some spatial partitioning in foraging areas. Male ... during the breeding season on fur seals, which have increased exponentially in recent years, may be ...
Meeting Document : WG-FSA-99/39 : Author(s): J. González-Solís, J.P. Croxall and A.G. Wood (United Kingdom)
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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 : Author(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 : Author(s): Delegation of United Kingdom
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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 : Author(s): Delegation of Australia
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Fish prey of the wandering albatross Diomedea exulans at South Georgia
between years but epipelagic fish were significantly more abundant in +I983 than 1984. All identified fish ... caught in the commercial fishery there. However, two of the three main target species of this fishery in ... fish prey but how they catch several species, including Muraenolepis, which are mainly benthic in habit ... is unknown. Published in: Polar Biology (1998) 8: 000-000 Author(s): J.P. Croxall, A.W. North and ...
Meeting Document : SC-CAMLR-VII/BG/05 : Author(s): J.P. Croxall, A.W. North and P.A. Prince (United Kingdom)
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A proposal to review and strengthen the CCAMLR System of Inspection
Abstract: The CCAMLR System of Inspection was adopted in 1988 at a time when few such schemes ... in the case of a suspected breach of measures in force;? providing an ability to promptly or ... immediately stop a CCAMLR Contracting Party-flagged vessel that is found to be in breach of a CCAMLR ... in order to strengthen their ability to verify compliance with CCAMLR conservation measures. Author(s ...
Meeting Document : CCAMLR-XXVI/29 Rev. 1 : Author(s): Delegation of Australia
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Medium-term research plan for the Ross Sea toothfish fishery
to identify key research objectives for the fishery over the next 3–5 years in relation to Article II ... uncertainties in our current knowledge that need to be addressed to fulfil the requirements of Article II. These ... include, for example, uncertainty in the biological parameters and stock assessment of Antarctic toothfish ... , uncertainty in its ecological relationships with predators and prey, and uncertainty over other ecosystem ...
Meeting Document : WG-FSA-14/60 : Author(s): Delegations of New Zealand, Norway and the United Kingdom
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Revised proposal for a dedicated krill survey for CCAMLR Division 58.4.1 during 2018/19 season by the Japanese survey vessel, Kaiyo-maru
carried out by Japanese research vessel, Kaiyo-maru. No krill biomass has been estimated in the Division ... of krill biomass to update B 0 in the division and (2) oceanographic observations in the area to ... in this document. This revised proposal is presented to WG-EMM-18 with an intention to receive ... relevant in the final plan. Author(s): H. Murase, K. Abe, R. Matsukura, H. Sasaki, T. Ichii and H. Morita ...
Meeting Document : WG-EMM-18/17 : Author(s): H. Murase, K. Abe, R. Matsukura, H. Sasaki, T. Ichii and H. Morita
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A drone-based Antarctic fur seal (Arctocephalus gazella) census of the St. Telmo Islands, South Shetland Archipelago
to obtain in remote polar environments. The standard approach for income breeding pinnipeds, such as ... population dynamics in the South Shetland archipelago are largely driven by two breeding colonies, Cape ... 333, which represents a 79% reduction since the most recent survey in 2008, and a 90% reduction from ... the peak of recent production in 1997. Given the historical importance of Cape Shirreff and St Telmo ...
Meeting Document : WG-EMM-2019/65 : Author(s): D.J. Krause and M.E. Goebel
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Extinction risk of Antarctic and sub-Antarctic colonies of Pygoscelid penguins under climate change context
different colonies around Antarctica. In this study, the extinction risk of Adélie, Chinstrap and Gentoo ... penguins was evaluated in order to identify the most endangered colonies under present-day and future ... intraspecific competition appears as the most important endogenous factor in all colonies. In turn, the response ... reduction of carrying capacity is mediated by a decrease in food availability and appears as key factor for ...
Meeting Document : WG-EMM-2019/74 : Author(s): M. Huerta and S.A. Estay