Resultados de la búsqueda
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Fish in the diet of breeding Antarctic shags Phalacrocorax bransfieldensis at four colonies in the Danco Coast, Antarctic Peninsula
Abstract: The diet of breeding Antarctic shags Phalacrocorax bransfieldensis was investigated at ... four colonies at the Danco Coast, Antarctic Peninsula, by the analysis of 616 pellets (regurgitated ... , Notothenia coriiceps was the main prey in all of the sampling sites, followed in similar importance by G ... Point. Between colonies there were marked differences in the size of the fish consumed. The largest ...
Meeting Document : WG-EMM-00/9 : Autor(es): R. Casaux, A. Baroni and E. Barrera-Oro (Argentina)
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Effects of orientation on acoustic scattering from Antarctic krill at 120 kHz
Abstract: Backscattering measurements of 14 live individual Antarctic krill (Euphausia superb a ... ) were made at a frequency of 120 kHz in a chilled insulated tank at the Long Marine Laboratory in Santa ... Cruz, CA. Individual animals were suspended in front of the transducers, were only loosely constrained ... of the krill based on the video images and was applied to five of them, giving their target strengths ...
Meeting Document : WG-EMM-99/42 : Autor(es): D.E. McGehee (USA), R.L. O’Driscoll (New Zealand) and L.V. Martin Traykovski (USA)
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Sexual dimorphism and sexual segregation in foraging strategies of northern giant petrels Macronectes halli during incubation
Abstract: Giant petrels (Macronectes spp) are the most sexually dimorphic of all seabirds. We ... used satellite-tracking and mass change during incubation to investigate the influence of sexual size ... dimorphism, in terms of the intersexual food competition hypothesis, on foraging and fasting strategies of ... , duration of foraging trips) was greater for females than for males. In contrast, foraging efficiency ...
Meeting Document : WG-FSA-99/38 : Autor(es): J. González-Solís, J.P. Croxall and A.G. Wood (United Kingdom)
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Trends in entanglement of Antarctic fur seals (Arctocephalus gazella) in man-made debris at South Georgia
. Consequently, the authority responsible for the management of Southern Ocean marine resources (CCAMLR) actively ... campaigned for compliance with the MARPOL provisions relating to waste disposal at sea, and for cutting of ... of recording entangled fur seals confirms that entanglement is a persistent problem, although its ... doubled in the same period, so that the overall total of animals entangled may even have increased ...
Meeting Document : SC-CAMLR-XV/BG/03 : Autor(es): Delegation of the United Kingdom
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Reduced bait loss and bycatch of seabirds in longlining by using a seabird scarer
conservation point of view there is a strong incentive to solve this problem. This paper describes trials with ... Abstract: Although longlining is regarded as a highly conservation oriented method of fishing ... , bycatch of seabirds on longlines is a problem in certain seasons and areas. Birds feeding on the bait ... during setting of the gear might cause considerable bait loss and occasional hooking of birds might ...
Meeting Document : WG-IMALF-94/09 : Autor(es): S. Løkkeborg and Å. Bjordal (Norway)
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On the estimation of some demographic parameters for Adelie penguins
Abstract: A population dynamics model for Adelie penguins is developed which takes account of the ... factors of lower adult survival rates in the year of first breeding, and the possibility that such ... breeding may be deferred one year if conditions are poor. A Bayesian approach for estimation of the model ... for illustrative purposes. The results for this case would likely be improved by the provision of more ...
Meeting Document : WG-EMM-95/42 : Autor(es): Thomson, R.B., Butterworth, D.S.
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Fish prey of the wandering albatross Diomedea exulans at South Georgia
Abstract: The fish diet (45% of total diet by weight) of Wandering Albatrosses rearing chicks at ... South Georgia during the austral winters of 1983 and 1984 was investigated using otoliths retrieved from ... regurgitations. These provide the first quantitative data for this species and for any albatross. By number of ... (estimated from otolith length) of the main species was Pseudochaenichthys 51%, Muraenolepis 14 ...
Meeting Document : SC-CAMLR-VII/BG/05 : Autor(es): J.P. Croxall, A.W. North and P.A. Prince (United Kingdom)
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Climate change and the role of CCAMLR
Abstract: Abstract Fishing magnifies the sensitivity of ecosystems to the effects of climate ... adapting fishing strategies. ASOC advocates that the role of CCAMLR in the climate change context continues ... change, including monitoring efforts, data collection and area protection; 2) extending the use of Marine ... Protected Area (MPAs) networks; 3) extending the application of the Precautionary Approach to include the ...
Meeting Document : CCAMLR-XXIX/BG/19 : Autor(es): ASOC Observer
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A feedback approach to Ecosystem Based Management: model predictive control of the Antarctic krill fishery
Abstract: The Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) aims ... to develop a feedback approach to aid Ecosystem Based Management (EBM) of the Antarctic krill fishery ... rules based on their predicted performance in a model of the controlled system. Here we use MPC to ... develop a robust control strategy for a simulation model of a spatially resolved predator-prey system. We ...
Meeting Document : WG-EMM-12/19 : Autor(es): S. Hill and M. Cannon (United Kingdom)
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Demersal fish communities in the Ross Sea region of Antarctica: comparisons between video and trawl survey methods
Abstract: Reliable estimates of demersal fish community composition and population densities are ... essential for understanding the ecological effects of fisheries. Such estimates are conventionally derived ... . Using data collected during a survey of demersal fish communities in the Ross Sea region of Antarctica ... , we compared measures of community composition, population density, and biomass derived from three ...
Meeting Document : WG-FSA-12/51 : Autor(es): D.A. Bowden, S.M. Hanchet and P.M. Marriott (New Zealand)