Resultados de la búsqueda
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Zooplankton target strength: volumetric or areal dependence?
acoustic backscattering on animal volume or area was tested by fitting regression lines for TS versus the ... ) nor this experiment directly accounted for animal orientations. Simulations using a Distorted Wave ... Born Approximation Model (Chu et al., 1993), indicated that animal behavior is an important factor in ... cylindrical radius). The theoretical models chosen for this comparison were two versions of a high-pass bent ...
Meeting Document : WG-Krill-94/13 : Autor(es): D.A. Demer and L.V. Martin (USA)
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Foraging behaviour of Antarctic fur seals during periods of contrasting prey abundance
Abstract: Published in Journal of Animal Ecology (1994) 63, 000-000 Author(s): I.L. Boyd, J.P.Y ...
Meeting Document : WG-CEMP-94/12 : Autor(es): I.L. Boyd, J.P.Y. Arnould, T. Barton and J.P. Croxall (United Kingdom)
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On the state of Champsocephalus gunnari stock in Subarea 48.3 and methods of its assessment
bottom trawl surveys conducted by research and small-tonnage fishery vessels and used for the icefish ... stock assessment was repeatedly raised on the meetings of Working Group on Fish Stock Assessment (WGFSA ... 1). Now, having obtained once again good fishery and scientific data for comparison, it became ... icefish concentrations reaches 40-50 m;- at scientific trawlings the use of trawls with mesh less than 80 ...
Meeting Document : WG-FSA-00/45 : Autor(es): K. Shust, V. Senioukov, P. Gasiukov and A. Kozlov (Russia)
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Squeezed from both ends: Decline in Antarctic fur seals in the South Shetland Islands driven by both Top–down and Bottom–up processes
. This has led to an under emphasis of the role of bottom-up drivers for controlling fur seal production ... production estimates from 2002-2012 for Cape Shirreff, Livingston Island. Age-specific natality rates are ... poor recruitment and an aging population. However, age-specific natality rate has also declined ... Antarctic bottom-up processes are widely cited for explaining penguin population declines, whereas for ...
Meeting Document : WG-EMM-14/39 : Autor(es): M.E. Goebel and C.S. Reiss (USA)
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The BROKE-West acoustic krill biomass survey of CCAMLR Division 58.4.2
11 parallel transects between 30° and 80°E. The survey design was presented to WG-EMM for their ... Abstract: This document updates plans by Australia to conduct an acoustic biomass survey for ... is intended to produce a new estimate of B0 for this Division so that a revised precautionary catch ...
Meeting Document : WG-EMM-05/11 : Autor(es): S. Nicol, S. Kawaguchi, T. Jarvis and T. Pauly (Australia)
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A characterisation of the toothfish fishery in Subareas 88.1 and 88.2 from 1997–98 to 2012–13
vessels fishing shallower there in the last four years. There is some evidence for a similar reduction in ... biological aspects and catch of Antarctic toothfish for the period 1997–98 to 2012–13. In 2012–13, all the ... in recent years, the remaining catches came mainly from SSRUs 88.1C, 88.1J, and 88.2H. Unstandardised ... Antarctic toothfish CPUE in the Ross Sea and Subarea 88.2 fisheries have fluctuated over the past 10 years ...
Meeting Document : WG-FSA-13/48 : Autor(es): S. Hanchet, S. Mormede and A. Dunn (New Zealand)
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Brief results of research fishing in Subarea 88.3 in the 2010/11 season
distribution and nutrition of toothfish in subarea 88.3.B-D were collected 240 otolithes for age identification ... Abstract: According to the application that has been applied by Russian Federation in 2010 for ... “Sparta”, with two scientific observers aboard. They deployed 20 sets (trotline) at different depths ... sets had not took place because of complicated ice conditions. The catch was totally analyzed for its ...
Meeting Document : WG-SAM-11/09 : Autor(es): Delegation of the Russian Federation
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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
Georgia for the sixteenth consecutive winter (2005) and eighteenth consecutive summer (2005/06) are ... occurred to an adult female entangled in a plastic packing band causing slight constriction to the ... these entanglements involved juveniles. Of the entanglements where the animal could be sexed, females ... made up the majority during the summer, in contrast to previous years. The majority (63%) of summer ...
Meeting Document : SC-CAMLR-XXV/BG/13 : Autor(es): Delegation of the United Kingdom
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Focusing and testing fisher know-how to solve conservation problems: a common sense approach
of an active fishery. At the scientific level, peer review and publication certify results for the ... , turtles and seabirds, can pose serious threats to specific animal populations causing public outcry and ... seabird mortality in two fisheries: the Puget Sound drift gillnet fishery for sockeye salmon and the ... longline fisheries in Alaska for sablefish and Pacific cod. Although these fisheries are very different ...
Meeting Document : WG-FSA-03/20 : Autor(es): E.F. Melvin and J.K. Parrish (USA)
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Fish prey of the wandering albatross Diomedea exulans at South Georgia
regurgitations. These provide the first quantitative data for this species and for any albatross. By number of ... (35%), Muraenolepis microps (33 %) and Chaenocephalus acemtus (20%) predominated, with Notothenia ... between years but epipelagic fish were significantly more abundant in +I983 than 1984. All identified fish ... . It seems unlikely, therefore, that the albatrosses depend. greatly on the fishery for acquisition of ...
Meeting Document : SC-CAMLR-VII/BG/05 : Autor(es): J.P. Croxall, A.W. North and P.A. Prince (United Kingdom)