Resultados de la búsqueda

1. An exact time of release and recapture stock assessment model applied to Macquarie Island Patagonian toothfish (Dissostichus eleginoides)

   Abstract:  This paper presents an assessment of the harvested population of Patagonian toothfish ... at Macquarie Island based on data from a tag-recapture experiment initiated during the 1995/96 ... fishing season. Population models that include dynamics of tagged and un-tagged fish, daily releases ... , catches, recaptures, natural mortality, and annual net recruitment are used to assess the population of ...

   Meeting Document : WG-FSA-00/43 : Autor(es): G. Tuck, W. de la Mare, W. Hearn, R. Williams, A. Smith, X. He and A. Constable (Australia)

2. OCEANIC CIRCUMPOLAR HABITATS OF ANTARCTIC KRILL

   Abstract:  Surveys of Euphausia superba often target localised shelves and ice edges where their ... , with 70% of the total stock concentrated between 0o and 90oW. Within this Atlantic sector, krill are ... abundant over both shelf and ocean. At the Antarctic Peninsula, by contrast, they are found mainly over the ... inner shelf whereas in the Indian-Pacific sectors krill prevail in the ocean within 200-300 km of the ...

   Meeting Document : WG-EMM-08/P04 - Abstract : Autor(es): A. Atkinson, V. Siegel, E. A. Pakhomov, P. Rothery, V. Loeb, R.M. Ross, L.B. Quetin, K. Schmidt, P. Fretwell, E.J. Murphy, G.A. Tarling and A.H. Fleming

3. Fisheries risks to the population viability of black petrel (Procellaria parkinsoni)

   Abstract:  Data on the main population of black petrel (Procellaria parkinsoni), which breeds on ... Great Barrier Island, were analysed. Three types of data were available. The most useful was abundance ... data, from which it was possible to infer that the population was probably increasing at a rate between ... population. The mean age of first breeding for black petrel is estimated to be 6.7 y. Before this, new adults ...

   Meeting Document : WG-SAM-10/P01 : Autor(es): R.I.C.C. Francis and E.A. Bell (New Zealand)

4. Further development of a spatially explicit population dynamics operating model for Antarctic toothfish in the Ross Sea region

   . Observations include spatially explicit commercial catch proportions-at-age, proportions mature and proportions ... spawning (based on GSI data), CPUE, and tag-release and tag-recapture observations. Estimates of parameters ... appeared to broadly reflect the hypothesised spatial distribution of Antarctic toothfish, suggesting that ... younger fish were found predominantly in southern areas of the Ross Sea shelf, mature fish on the slope ...

   Meeting Document : WG-SAM-13/35 : Autor(es): S. Mormede, A. Dunn, S. Parker and S. Hanchet (New Zealand)

5. Long-term change in zooplankton communities of the Southern Ocean between 1997 and 2018: implications for fisheries and ecosystems

   Abstract:  We provide an analysis of zooplankton distributions in the circumpolar Southern Ocean ... productivity, sea-surface temperature (SST), mixed layer depth, sea ice and the spatial gradient of SST (as an ... indicator of ocean fronts). Boosted Regression Tree models were used to investigate relationships between ... the abundances of key groups of zooplankton, occurrence of characteristic zooplankton communities, and ...

   Meeting Document : WG-EMM-2019/66 : Autor(es): M.H. Pinkerton, M. Decima, J. Kitchener, K. Takahashi, K. Robinson, R. Stewart and G.W. Hosie

6. 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 : Autor(es): J. Forcada, P.N. Trathan and E.J. Murphy

7. Distribution and abundance of Antarctic krill (Euphausia superba) off East Antarctic (30–80°E) in January–March 2006

   -2. B0 was estimated to be 12.46 million tonnes with a CV of 15.15%. Krill were widely distributed at ... of Division 58.4.2 for the purposes of estimating the unexploited biomass (B0) of Antarctic krill ... (Euphausia superba) and its associated coefficient of variance (CV). This paper updates the version submitted ... to WG-EMM in 2006 (WG-EMM-06/16) because a reanalysis of the data has resulted in amendments to the ...

   Meeting Document : WG-EMM-07/33 : Autor(es): T. Jarvis, N. Kelly, E. van Wijk, S. Kawaguchi and S. Nicol (Australia)

8. IMPLEMENTATION OF FISHERY CONSERVATION MEASURES IN 2009/10

   Abstract:  Table of Contents Topic Page Introduction 1 Fisheries in 2009/10 1 Fishery monitoring 3 ... -02 7 Preliminary assessments of impacts of bottom fishing CM 22-06 7 Krill fisheries notified under ... 2009/10 9 INTRODUCTION 1. Conservation Measures (CM) and resolutions adopted at CCAMLR-XXVIII were ... 2010. These CMs and resolutions were published in the Schedule of Conservation Measures in Force in ...

   Meeting Document : CCAMLR-XXIX/BG/10 : Autor(es): Secretariat

9. Summer distribution, abundance and structure of krill populations (Euphausia superba and Euphausia crystallorophias) sampled by plankton net in the western Ross Sea (January–February 2000)

   ) were analysed to obtain a general picture of the summer distribution pattern, abundance and demography ... of krill in the western Ross Sea (Antarctica). A midwater sampler-trawl (Hamburg Plankton Net) was ... used to collect zooplankton and fish larvae at 63 stations. The net was deployed normally as a standard ... double oblique tow. Mean relative biomass of Antarctic krill Euphausia superba, in the area north of ...

   Meeting Document : WG-EMM-00/38 : Autor(es): M. Azzali, A. Sala and G. Brancato (Italy)

10. ECOSYSTEM SERVICES OF THE SOUTHERN OCEAN

    the Southern Ocean ecosystem is generally under-represented in assessments of ecosystem services at ... Abstract:  The Southern Ocean is a globally important marine region, providing a range of ... ecosystem services which support human life, health and well-being, including the provision of marine living ... resources, and the regulation of global climate and sea level. Assessing ecological processes in terms of ...

    Meeting Document : WG-EMM-11/21 : Autor(es): S.M. Grant, S.L. Hill and P.N. Trathan (UK)

Páginas