Resultados de la búsqueda
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Summary of holdings of Patagonian toothfish (Dissostichus eleginoides) otoliths and size-at-age estimates from Heard and McDonald Islands (Division 58.5.2)
Abstract: Scientific observers aboard vessels in the Australian fisheries in 58.5.2 have ... collected Dissostichus eleginoides otoliths since the fishery commenced in the 1996/97 season. This program ... has yielded data which has assisted with understanding age structure and growth rates of toothfish in ... currently used in the assessment to predict growth and assign length-at-age to catch-at age, however an ...
Meeting Document : WG-FSA-07/45 : Autor(es): D.C. Welsford and G.B. Nowara (Australia)
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Application of continuous time Markov chains to modelling animal movement: estimation of movement rates and retention times for Patagonian toothfish
Abstract: The study of animal movement and distribution has been a central focus in ecology since ... apply the model to estimate the equilibrium distribution of Patagonian toothfish in the region around ... the inception of the science. However, continuous-time, discrete state models have received relatively ... Heard and MacDonald Islands in the Australian Antarctic zone using to mark-recapture data from the ...
Meeting Document : WG-FSA-SAM-06/16 : Autor(es): C. Wilcox, M. Bravington and D. Peel (Australia)
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Preliminary results of an age/length study of juvenile Notothenia rossii marmorata from Potter Cove, South Shetland Islands
Islands. Results from the analysis of both structures agreed in 95.5%. Likewise, the examination of ... otolith cross sections of chosen specimens confirmed in all the cases the age readings obtained from the ... respectively, which is well in accord with the known length-age distribution of juvenile specimens of the ... species in the fjord. Mean length data at age presented here were compared with published values for ...
Meeting Document : WG-FSA-90/09 : Autor(es): E. Barrera-Oro and R. Casaux (Argentina)
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STRONG EFFECTS OF ENVIRONMENTAL CONDITIONS ON REPRODUCTIVE SUCCESS OF PENGUINS AT KING GEORGE ISLAND
variability in the reproductive success of Adélie, gentoo, and chinstrap penguins can be explained by simple ... of directional climate change on the future of reproductive success in monitored populations. Author ... ice extent measured during the winter prior to breeding also appears to be an important predictor of ... reproductive success in all species. Biological variables measured during the chick-rearing phase, like krill ...
Meeting Document : WG-EMM-09/43 : Autor(es): J. Hinke, C. Reiss and W. Trivelpiece (USA)
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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 ... Abstract: This report details the twelfth annual survey of the incidence of entanglements of ...
Meeting Document : WG-FSA-08/26 : Autor(es): M.J. Dunn and C.M. Waluda (UK)
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Maximum entropy reconstruction of stock distribution and inference of stock density from line-transect acoustic survey data
allows the most efficient possible use of known data in the inference process. The method takes explicit ... account of spatial correlation in the observed data and seeks to reconstruct a distribution of density ... method is computationally demanding but appears to work well, even in cases when the distribution of ... distribution from acoustic line-transect data. MaxEnt is founded on the bedrock of probability theory and ...
Meeting Document : WG-EMM-02/35 : Autor(es): A.S. Brierley, S.F. Gull and M.H. Wafy (United Kingdom)
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Decline of Antarctic fur seal (Arctocephalus gazella) population at SSSI No. 32, South Shetlands, Antarctica, during 1997/98: a discussion of possible causes
Abstract: Little is known of what happened after the exploitation period with the population of ... the northen tip of Livingston island, where the most important colony of this species on the South ... Niño event, although lower mean weights are reported. Nevertheless, we expect to see during the ... Antarctic fur seal (Arctocephalus gazella) on the Antarctic peninsula region, specifically on the South ...
Meeting Document : WG-EMM-98/17 : Autor(es): R. Hucke-Gaete, D. Torres, A. Aguayo and V. Vallejos (Chile)
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Project of a software catalog of skeletal elements from Antarctic fish species, including some identification facilities
Abstract: In our study skeletal elements from fish species of the Antarctic waters were extracted ... , including a database of bone pictures and in the near future various identification keys as well, completed ... by a simple tool to compare the same skeletal elements of different species. In the database most of ... the skeletal elements of the cranial and axial skeleton (apart from a few bones of the neurocranium ...
Meeting Document : WG-FSA-05/35 : Autor(es): J. von Busekist, M. Vacchi and G. Albertelli (Italy)
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INGESTION OF FISHING GEAR AND ENTANGLEMENTS OF SEABIRDS: IMPLICATIONS FOR MONITORING AND MANAGEMENT
of a 16 year dataset collected at Bird Island indicated that the amount of gear found in association ... corresponding with a substantial increase in the number of multifilament snoods (gangions), suggesting that the ... legislation prohibits discarding of gear (hooks and line) in offal, and compliance is often unknown. Analysis ... with wandering albatross colonies was an order of magnitude greater than in any other species ...
Meeting Document : WG-IMAF-09/10 : Autor(es): R.A. Phillips, C. Ridley, N. Harrison (United Kindom), K. Reid (Secretariat), G.N. Tuck (Australia) and P.J.A. Pugh (United Kingdom)
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Distribution and biological characteristics of two toothfish species of genus Dissostichus (family Nototheniidae) off Bouvet Island
vertical distribution of toothfish in the fishing area were analyzed also. Author(s): A.F. Petrov ... ) toothfish, were registered during the fishery on Dissosyichus spp. on the shelf edge and slope of Bouvet ... surrounding the island. The vertical distribution of two species was differentiated distinctly, with the ... crossover point at depth of 1300 m. For both species the size and weight compositions were studied; indices ...
Meeting Document : WG-FSA-11/17 : Autor(es): A.F. Petrov (Russia)