Resultados de la búsqueda
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Ross Sea Bioregionalisation, Part II: Patterns of co-occurrence of mesopredators in an intact polar ocean ecosystem
Abstract: We report results of analyses of niche occupation among mesopredators in the Ross Sea ... the surface of the ocean, 2) capacity to utilize differing amounts of the water column (foraging depth ... because of their rarity and, therefore, lack of adequate sighting data on which to generate spatial models ... (Maxent) was used to model spatial patterns of species’ probabilities of occurrence, and these data were ...
Meeting Document : WG-EMM-10/12 : Autor(es): G. Ballard, D. Jongsomjit and D.G. Ainley (USA)
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Development of methods for evaluating the management of benthic impacts from longline fishing using spatially explicit production models
Abstract: An important management objective for CCAMLR in the high seas region of the Antarctic ... is to develop appropriate methods of monitoring and managing impacts of bottom fisheries on ... investigate a range of simple scenarios for simulating the effect and management of benthic impacts from ... longline fishing effort. Simulations were carried out under a range of productivity assumptions, impact ...
Meeting Document : WG-SAM-10/19 : Autor(es): A. Dunn, S.J. Parker and S. Mormede (New Zealand)
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Adélie penguins as indicators of the state of the sea-ice in Adélie Land
Abstract: In the 2013-14 reproductive season, the 26,000 pairs of Adélie penguins from Pétrel ... of parents meant that the partner and/or the chick fasted longer at the nest, increasing the risk of ... desertion by the partner and the risk of dying of prolonged fast for the chick(s). Second, the season was ... characterized by unusual precipitations of rain around the turn of the year that killed massively the already ...
Meeting Document : WG-EMM-17/01 Rev. 1 : Autor(es): Y. Ropert-Coudert, A. Kato and C. Barbraud
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Features of chronology and breeding success of Pygoscelis papua and Pygoscelis adeliae penguins in the Wilhelm Archipelago (CCAMLR Subarea 48.1)
Abstract: We aim to investigate the qualitative changes in the habitats of two most common ... (Adelie) penguins in the CCAMLR Subarea 48.1 under the impact of climate changes and krill fishery. To ... minimize the effect of human disturbance on the breeding success and survival of chicks and avoid ... disturbance to the penguins, the new method of registration using time-lapse cameras have been installed in ...
Meeting Document : SC-CAMLR-XXXVII/BG/05 : Autor(es): I.V. Dykyy, G.P. Milinevsky, O.L. Savitsky, D.G. Lutsenko, P.B. Khoetsky, M.F. Veselsky, V.M. Smagol, A.O. Dzhulay, J.V. Tsaryk, K.M. Nazaruk, A.T. Zatushevsky, A.O. Simon and M.A. Telipska
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STRUCTURE OF THE WATER MASSES AND KRILL DISTRIBUTION IN THE CENTRAL AND EASTERN PARTS OF THE ATLANTIC ANTARCTIC AREA
Abstract: The data of 18 expeditions fulfilled by AtlantNIRO during 1970-2000 in the central and ... eastern part of the Area 48 (Subareas 48.4 and 48.6) were summarized. Distribution of krill was analyzed ... with reference to the structure and dynamics of the water masses in the area of the Southern Sandwich ... Islands arc, the Bouveau Island, the Maude seamount, the southern part of the Lazarev Sea and up to the ...
Meeting Document : WG-EMM-11/24 : Autor(es): V.N. Shnar and S.M. Kasatkina (Russia)
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Accounting for food requirements of seabirds in fisheries management – the case of the South African purse-seine fishery
bergii. Availability of prey is thought to influence the populations of these species, but their food ... requirements have not been accounted for in management of the purse-seine fishery on sardine and anchovy. Means ... of identifying and attaining target populations of predators that are dependent on forage fish prey ... conservation status of a species may prove useful in determining minimum viable populations, and that the use ...
Meeting Document : WG-EMM-04/28 : Autor(es): R.J.M Crawford (South Africa)
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Theoretical considerations for estimating the density of cohorts and mean recruitment of Patagonian toothfish (Dissostichus eleginoides) based on research trawl survey data
assessing the long-term yield for toothfish fisheries in CCAMLR uses estimates of density of juvenile ... toothfish derived from research trawl surveys as an estimate of absolute abundance of recruitment to the ... fishery. At the 2003 meeting of WG-FSA a number of inconsistencies were identified in the estimation of ... the recruitment series for Subarea 48.3. In light of this, the Scientific Committee agreed that there ...
Meeting Document : WG-FSA-04/92 : Autor(es): C.R. Davies, E.M. van Wijk and A.J. Constable (Australia)
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Maximum entropy reconstruction of stock distribution and inference of stock density from line-transect acoustic survey data
distribution from acoustic line-transect data. MaxEnt is founded on the bedrock of probability theory and ... 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 ... maximized. The method is iterative and uses the Bayesian approach of evaluating the posterior probability of ...
Meeting Document : WG-EMM-02/35 : Autor(es): A.S. Brierley, S.F. Gull and M.H. Wafy (United Kingdom)
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Utilising data from ecosystem monitoring for managing fisheries: development of statistical summaries of indices arising from the CCAMLR Ecosystem Monitoring Program
parameters. The paper is divided into four main parts. The first part develops the proposed method of forming ... Abstract: A potential method is presented for combining data collected as part of the CCAMLR ... ecosystem monitoring program (CEMP) into a single index for each of predator, prey and environmental ... summary indices, which is based on the usual theory of multivariate statistics and takes into account the ...
Meeting Document : WG-EMM-00/14 Rev. 1 : Autor(es): W. de la Mare and A. Constable (Australia)
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Estimating the biodiversity of the shelf and oceanic zone of the d’Urville Sea (East Antarctica) for ecoregionalisation using the CEAMARC (Collaborative East Antarctic Marine Census) CAML surveys
Abstract: A proposal for a representative system of MPAs (RSMPA) for eastern Antarctica (CCAMLR ... Divisions 58.4.1 and 58.4.2) has been developed to satisfy overall the principles of comprehensiveness ... of the areas identified in the proposal (140-150°E from the coast to 60°S). This area has been ... studied by a number of countries in the CEAMARC surveys (Collaborative East Antarctic Marine Census) as ...
Meeting Document : WS-MPA-11/07 : Autor(es): P. Koubbi (France), G. Hosie, A. Constable, B. Raymond (Australia), M. Moteki (Japan), N. Améziane, R. Causse (France), V. Fuentes (Spain), K. Heerah, F. Penot, D. Vincent, A. Ancel, C.A. Bost, M. Eléaume (France), D. Lindsay (Japan), M. Lindsay (Australi