Resultados de la búsqueda
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Fisheries risks to the population viability of black petrel (Procellaria parkinsoni)
1.2% and 3.1% per year. Mark-recapture data were useful in estimating demographic parameters, like ... spend an average of 1.2 y in the colony as pre-breeders, with only 3% skipping the pre-breeder phase. Of ... birds that appear in the study area as pre-breeders and survive to breed, only 68% do so in the study ... well determined because we can’t distinguish mortality from emigration (birds that breed in an area ...
Meeting Document : WG-SAM-10/P01 : Autor(es): R.I.C.C. Francis and E.A. Bell (New Zealand)
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Informing and seeking advice from WG-SAM-18 about the revisions of the WSMPA proposal
in the Weddell Sea (WSMPA) to CCAMLR 2016, Germany has carried out further work on the WSMPA proposal ... ; Adjustment of the habitat of adult Antarctic toothfish in statistical areas 48.6 and 48.5 as a result of ... reference areas in statistical subarea 48.6 for monitoring the effects of harvesting on Antarctic marine ... the fisheries research zone (FRZ) foreseen in the draft WSMPA Conservation Measure and the ...
Meeting Document : WG-SAM-18/16 : Autor(es): S. Hain, K. Teschke, H. Pehlke and T. Brey
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Informing and seeking advice from WS-SM 2018 about the revisions of the WSMPA proposal
in the Weddell Sea (WSMPA) to CCAMLR 2016, Germany has carried out further work on the WSMPA proposal ... Antarctic Peninsula; Adjustment of the habitat of adult Antarctic toothfish in statistical areas 48.6 and ... ; Establishment of scientific reference areas in statistical subarea 48.6 for monitoring the effects of harvesting ... ) foreseen in the draft WSMPA Conservation Measure and the establishment (number, location and size) of ...
Meeting Document : WS-SM-18/08 : Autor(es): S. Hain, K. Teschke, H. Pehlke and T. Brey
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Distribution and ecology of Chaenocephalus aceratus (Channichthyidae) around South Georgia and Shag Rocks (Southern Ocean).
demersal fish living on the South Georgia shelf where it is caught in low numbers as by-catch in the ... that growth was fast in the first five years with males and females attaining lengths at first spawning ... in diet from Euphausia superba and mysids to benthic fish and decapods observed to begin at 250 mm TL ... . In larger fish (> 500 mm TL) the diet was dominated by fish. C. aceratus diet is sufficiently ...
Meeting Document : WG-FSA-07/P5 : Autor(es): W.D.K Reid, S. Clarke, M.A. Collins and M. Belchier. (Polar Biol., 30 (12): 1523–1533 (2007))
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Histopathology of Antarctic krill (Euphausia superba) bearing black spots
Abstract: In Antarctic krill, Euphausia superba, sampled by a Japanese scientific observer ... onboard a krill fishing vessel in the winter of 2003 and 2006 in the South Georgia region, the Antarctic ... strains were also confirmed by in situ hybridization for 16S rRNA. The melanized nodules were almost ... secondary. The development of the tumor-like cell mass in the gonad may be the primary condition, although ...
Meeting Document : WG-EMM-07/29 : Autor(es): S. Miwa, T. Kamaishi, T. Matsuyama, T. Hayashi and M. Naganobu (Japan)
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Modelling growth of Antarctic krill: growth trends with sex, length, season, and region
seasonal trend for each region. Smaller krill exhibited higher growth rates and a progressive decrease in ... growth was December in Indian sector, whereas in the Scotia Sea sector it appeared to be a few months ... earlier than this. Significantly lower growth rates were exhibited by females in January and February ... relative to males. Seasonal specific growth rates estimated in this study were compared to previous studies ...
Meeting Document : WG-EMM-05/29 : Autor(es): S. Kawaguchi, S. Candy, R. King (Australia), M. Naganobu (Japan) and S. Nicol (Australia)
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Reconciling theoretical versus empirical target strengths of krill; effects of phase variability on the distorted wave Born approximation
, the authors noted that the differences were not entirely due to noise. In this study, the accuracy of ... the DWBA model is further explored. Results indicate that phase variability in the scatter from ... elements of a discretized bent cylinder (krill model) causes a dramatic flattening in the side-lobe regions ... krill TS measurements in McGehee et al. (1998). Thus, by accounting for phase-variability in the ...
Meeting Document : WG-EMM-02/50 : Autor(es): D.A. Demer and S.G. Conti (USA)
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Longline fishing at Tristan da Cunha: impacts on seabirds
Abstract: Tristan da Cunha and Gough Islands in the central South Atlantic Ocean support globally ... effort, probably has a much greater impact. Observations aboard one vessel in mid-winter suggest a ... bycatch rate of> 1 bird killed per 1000 hooks; this could be even higher in summer when more birds are ... from vessels fishing illegally in Tristan waters, as well as vessels in international waters that do ...
Meeting Document : WG-FSA-01/15 : Autor(es): N. Glass, I. Lavarello, J.P. Glass and P.G. Ryan (South Africa)
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A proposal to subdivide CCAMLR Statistical Division 58.4.1 using environmental data
Abstract: A precautionary catch limit for krill was established for CCAMLR Division 58.4.1 in ... 58.4.1 is not meridionally homogeneous in its oceanographic or biological characteristics. Division ... basis of environmental data. Krill is more abundant in the western subdivision and its biomass is more ... latitudinally extensive in this area. This observed pattern appears to be historically stable. Because of the ...
Meeting Document : WG-EMM-00/30 : Autor(es): S. Nicol and T. Pauly (Australia)
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BEACH DEBRIS SURVEY AND INCIDENCE OF ENTANGLEMENT OF ANTARCTIC FUR SEALS ARCTOCEPHALUS GAZELLA AT SIGNY ISLAND, SOUTH ORKNEY ISLANDS 2007/2008
). There was a decrease in the number of plastic packaging bands with only two found in the current season ... (both of which had been cut open), marking a break in the otherwise continued rise in packaging bands ... the longevity of plastics and other materials with a high resistance to degradation in the marine ...
Meeting Document : WG-FSA-08/26 : Autor(es): M.J. Dunn and C.M. Waluda (UK)