Résultats de la recherche
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LIFE HISTORY BUFFERING IN ANTARCTIC MAMMALS AND BIRDS AGAINST CHANGING PATTERNS OF CLIMATE AND ENVIRONMENTAL VARIATION
Abstract: The consequences of warming for Antarctic long-lived organisms depend on their ability ... to survive changing patterns of climate and environmental variation. Among birds and mammals of ... and Weddell seals, we found strong support for selection of life history traits that reduce ... survival of adults and in their propensity to breed annually, which are the vital rates that influence most ...
Meeting Document : WG-EMM-08/P05 : Auteur(s): J. Forcada, P.N. Trathan and E.J. Murphy
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ANALYSIS OF ROSS SEA TAGGING AND RECAPTURE RATES
Abstract: 1. A dataset of all possible combinations of release nation, recapture nation, release ... year and recapture year for tags released and recaptured in the same SSRUs on the slope of 88.1 was ... (caught), all in numbers. 2. The overall size of the dataset was 734 combinations of release year ... the same. 3. This method could be used to identify groups of nations that have similar reporting rates ...
Meeting Document : WG-SAM-08/07 : Auteur(s): D.J. Agnew (UK)
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Recent population estimates and trends in numbers of albatrosses and giant petrels breeding at the sub-Antarctic Prince Edward Islands
Abstract: The second mid-summer survey of surface-nesting seabirds at the Prince Edward Island ... Edward Island, mirroring a decrease of roughly 2% per year at Marion Island from 1998 to 2005, a decline ... that has since reversed. Numbers of grey-headed albatrosses Thalassarche chrysostoma on Marion Island ... (3% per year). The estimate of Indian yellow-nosed albatrosses T. carteri at Prince Edward Island was ...
Meeting Document : WG-EMM-10/P04 : Auteur(s): P.G. Ryan, M.G.W. Jones, B.M. Dyer, L. Upfold and R.J.M. Crawford
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Latitudinal variation of demersal fish assemblages in the western Ross Sea
°S. The distribution and abundance of 65 species collected in these surveys were examined to ... influence this. Species accumulation with sample frequency did not reach an asymptote, but the rate of new ... species was low suggesting data were adequate for describing the main components of the communities. Three ... broad assemblages were identified, in the southern Ross Sea (south of 74°S), central–northern Ross Sea ...
Meeting Document : WG-FSA-10/P03 : Auteur(s): M.R. Clark, M.R. Dunn, P.J. McMillan, M.H. Pinkerton, A. Stewart and S.M. Hanchet
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Measures to avoid bias in abundance estimates of Dissostichus spp. based on tag-recapture data
Abstract: Using the simplest form of an abundance estimator using tag-recapture data, the Lincoln ... against this bias, or to account for their effects in assessment models. In nearly all cases, examples of ... these biases. Estimates of post-capture mortality, tag detection rates and where it occurs, post-release ... depredation rates are a priority for new tagging programs and tag-based assessments. Due to the complexity of ...
Meeting Document : WG-SAM-12/23 : Auteur(s): D.C. Welsford and P.E. Ziegler (Australia)
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Warming effects in the Western Antarctic Peninsula Ecosystem: the role of population dynamic models for explaining and predicting penguin trends
developed simple conceptual models for decipher the role of climate and krill fluctuations on the population ... dynamics of these three pygoscelid penguin species inhabiting the Antarctic Peninsula region. Our results ... suggest that the relevant processes underlying the population dynamics of these penguin species at King ... George Island (Antarctic Peninsula) are intra-specific competition and the combined effects of krill ...
Meeting Document : WG-EMM-12/18 : Auteur(s): M. Lima and S.A. Estay (Chile)
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Characterisation of Muraenolepis species by-catch in the CCAMLR Convention Area
taxonomy of the group is needed and the number of species is uncertain. The few biological studies ... published suggest a relatively fast growing, semelparous, life history with a maximum age of 11 years. The ... estimate of K from the growth function for specimens assumed to be M. evseenkoi is much higher than for ... localised area of high catch rates occurs on Iselin Bank on Ross Sea slope. However, effects of fishing on ...
Meeting Document : WG-FSA-12/50 : Auteur(s): S. Parker, P. McMillan and P. Marriott (New Zealand)
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Preliminary assessment of Patagonian toothfish in Subarea 48.3
Abstract: A preliminary assessment of toothfish (Dissostichus eleginoides.) in Subarea 48.3 is ... presented. The assessment results from this year’s analyses are very similar to those of 2011. SSB in the ... terminal assessment year continues to be estimated at around 54% of virgin biomass, consistent with the ... outputs from the 2-fleet and 3-fleet assessments are very similar with the exception of the ...
Meeting Document : WG-FSA-13/30 : Auteur(s): R. Scott (United Kingdom)
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European Union – Measurement of capacity in CCAMLR exploratory fisheries in Subareas 88.1 and 88.2
fishery. The number of vessels operating in the fishery has progressively increased in recent years yet ... individual vessels have reduced. This report investigates recent trends in the development of the Ross Sea ... fishery in order to be aware of the pressures within the fishery as well as the trends and changes that ... are impacted by management measures. There is therefore a requirement for the routine production of ...
Meeting Document : WG-SAM-14/19 : Auteur(s): Delegation of the European Union
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First global census of the Adélie penguin
Abstract: We report on the first global census of the Adélie Penguin (Pygoscelis adeliae ... ), achieved using a combination of ground counts and satellite imagery, and find a breeding population 53 ... report on 17 previously unknown colonies. We think 11 of these previously unknown colonies may be recent ... colonizations. These recent colonizations represent approximately 5% of the increase in known breeding ...
Meeting Document : WG-EMM-14/P05 : Auteur(s): H.J. Lynch and M.A. LaRue