Search results
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Population dynamics of black-browed and grey-headed albatrosses Diomedea melanophrys and D. chrysostoma at Campbell Island, New Zealand, 1942–96
-browed Albatross numbers went into a steep decline in the 1970s and, since at least 1984, have been ... in numbers of the Grey-headed Albatross has continued into the 1990s, averaging annually between 3.0 ... are accidentally killed in the Japanese long-line fishery for tuna Thunnus sp. In the Australasian ... region. The steep decline of Black-browed Albatross numbers in the 1970s was concomitant with the ...
Meeting Document : WG-FSA-04/58 : Author(s): S.M. Waugh (New Zealand), H. Weimerskirch (France), P.J. Moore and P.M. Sagar (New Zealand)
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A balanced trophic model of the ecosystem of the Ross Sea, Antarctica, for investigating effects of the Antarctic toothfish fishery
variability in primary production. In the relative absence of krill, Antarctic silverfish (Pleuragramma ... primary production and the larger predators, though the role of cepahlopods in the system is poorly known ... characteristics are not well known. Toothed and baleen whales visit the Ross Sea in summer in relatively large ... in summer, and some may stay in the region year-round. The trophic model was balanced by adjusting ...
Meeting Document : WG-EMM-07/18 : Author(s): M.H. Pinkerton, S.M. Hanchet and J. Bradford-Grieve (New Zealand)
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Entanglement of Antarctic fur seals (Arctocephalus gazella) by man made debris at Bird Island, South Georgia, during the 2005 winter and 2005/06 breeding season
reported here. Two entanglements were observed in the winter, a decrease of 60% from the previous year, and ... the lowest number seen since records began in 1990. One of these involved a male pup entangled in ... occurred to an adult female entangled in a plastic packing band causing slight constriction to the ... individual involved. In contrast there was double the number of observed entanglements during summer of 2005 ...
Meeting Document : SC-CAMLR-XXV/BG/13 : Author(s): Delegation of the United Kingdom
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Do Adélie penguin fledgling weights provide an index of prey availability?
Abstract: We examine fledgling weights measured over 11 years at Béchervaise Island in relation ... as strong for the crèche foraging trips later in the season. Fledgling weights which are measured at ... crèche stages of the breeding season. In some seasons, there appeared to be constant levels of resources ... throughout the breeding season resulting in good breeding success with heavy fledglings or poor breeding ...
Meeting Document : WG-EMM-05/21 : Author(s): L. Emmerson, C. Southwell and J. Clarke (Australia)
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Development of best practices for the collection of longline data to facilitate research and analysis to reduce by-catch: report of a workshop held at the International Fisheries Observer Conference
, sea turtles, and seabirds in longline fisheries, a workshop was organized to develop “best practices ... ” in observer data collections. The workshop was held in conjunction with the International Fisheries ... Observer Conference, November 8-11, 2004, in Sydney, Australia. The objectives of the workshop were to ... observer data collection in longline fisheries that would facilitate research and analysis to reduce ...
Meeting Document : WG-FSA-05/45 : Author(s): K.S. Dietrich, K.S. Rivera, V. Cornish and T. Conant (USA)
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Krill of the Ross Sea: distribution, abundance and demography of Euphausia superba and Euphausia crystallorophias during the Italian Antarctic expedition (January–February 2000)
of krill in the western Ross Sea (Antarctica). A midwater sampler-trawl (Hamburg Plankton Net) was ... , in the area north of Continental Shelf, was 9.3 g/1000m3 of filtered water with a mean density of ... 10.9 individuals per 1000m3. Ice krill Euphausia crystallorophias replaced the Antarctic krill in ... dominance in the High Antarctic Zone (south of 74°), with a mean relative biomass of 3.0 g/1000m3 and mean ...
Meeting Document : WG-EMM-02/32 Text : Author(s): A. Sala, M. Azzali and A. Russo (Italy)
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Krill fishery report: 2012 update
have fished for krill in Area 48; one vessel is using the continuous fishing system. The total catch ... reported to May 2012 was 78468 t, mostly taken from Subarea 48.1 in December, April and May. Seven vessels ... . In 2010/11, 13 vessels fished for krill in Area 48 and the total catch of krill was 180986 t; two ... Islands in Subarea 48.2 where a total of 111472 t of krill was taken from SSMU SOW (South Orkney West ...
Meeting Document : WG-EMM-12/05 : Author(s): Secretariat
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Seabird and longline interactions: effects of a bird-scaring streamer line and line shooter on the incidental capture of northern fulmars Fulmarus glacialis
line and a line shooter was investigated in commercial longlining in the northern Atlantic off the ... mitigation measures, a combination of both and no mitigation measure. A total of 58,420 hooks were set in ... was caught when the bird-scaring line was used in combination with the line shooter. In contrast, 32 ... fulmars were caught in sets with no mitigation device and thirteen in sets with the line shooter alone ...
Meeting Document : WG-FSA-01/78 : Author(s): S. Løkkeborg (Norway) and G. Robertson (Australia)
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Global relationships amongst black-browed albatrosses: analysis of population structure using mtDNA and microsatellites
five island groups in the Southern Ocean. High levels of sequence divergence were found in both taxa ... (0.55–7.20% in black-browed albatrosses and 2.10–3.90% in grey-headed albatrosses). Black-browed ... , indicating high levels of mixture and hybridization. In contrast, grey-headed albatrosses form one globally ... markers found similar population structure to the mtDNA analyses in both black-browed and grey-headed ...
Meeting Document : WG-FSA-01/19 : Author(s): T.M. Burg and J.P. Croxall (United Kingdom)
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A generalized discriminant for sexing fulmarine petrels from external measurements
birds to predict the sex of unknown individuals in field studies. Geographic variation in size and shape ... , Daption capense; and Snow Petrel, Pagodroma nivea) assigned 81 to 98% of birds in the samples to the ... single discriminant. Adequate performance of this generalized discriminant in samples of different ... species shows its validity for use in other populations of any of these species. The generalized function ...
Meeting Document : WG-CEMP-94/24 : Author(s): J.A. van Franeker and C.J.F. ter Braak (The Netherlands)