Résultats de la recherche
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Pup production and distribution of breeding Antarctic fur seals (Arctocephalus gazella) at South Georgia
Abstract: A census of the breeding population of Antarctic fur seals (Arctocephalus gazella) at ... South Georgia was carried out during the 1990/91 breeding season. Using counts of adult females ashore ... at the breeding grounds during the pupping period, together with corrections for the likelihood of a ... 269,000 (95% confidence intervals 188,000- 350,000). The breeding population in 1990/91 was reduced at ...
Meeting Document : WG-CEMP-92/39 : Auteur(s): I.L. Boyd (United Kingdom)
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Entanglement in man-made debris of Antarctic fur seals at Bird Island, South Georgia
removed from 170) during the 142 days of the 1988-89 pup-rearing season at Bird Island, South Georgia ... . This represents at least 0.1% of the total Bird Island population and a minimum of 0.4% of animals in ... the best covered areas; a maximum value might approach 1%. Poly-propylene straps (packaging bands ... ) formed 59% of collars, nylon string (15%), fishing net (13%) and six other materials comprising the rest ...
Meeting Document : CCAMLR-VIII/BG/05 : Auteur(s): J.P. Croxall, S. Rodwell and I.P. Boyd (United Kingdom)
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Selectivity of standard polish commercial trawl codends on Antarctic fishing grounds
= 100 mm, made of double twines with a thickness of 4.2 mm. The studies covered 6 major fish species. 1 ... . It appears from the study that Antarctic icefish and bumphead notothenia are subject to selection ... during trawling, although the effectiveness of this process- especially in the latter case- is not ... tendency to pass through meshes of the codend than Antarctic icefish and bumphead notothenia. 3. The ...
Meeting Document : SC-CAMLR-VII/BG/11 : Auteur(s): J. Zaucha (Poland)
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Congruent, decreasing trends of Gentoo Penguins and Crozet Shags at sub-Antarctic Marion Island suggest food limitation through common environmental forcing
] melanogenis breeding annually at Marion Island, one of South Africa’s Prince Edward Islands in the south-west ... between the mid-1990s and the mid-2000s, exhibited a partial recovery in the late-2000s and then decreased ... to their lowest recorded levels in 2012/13. In both instances, the partial recoveries in the late ... was negatively correlated with the date of arrival of adults to breed. Gentoo Penguins and Crozet ...
Meeting Document : WG-EMM-14/P09 Rev. 1 : Auteur(s): R.J.M. Crawford, B.M. Dyer, L. Upfold and A.B. Makhado
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Total mercury and methylmercury concentrations in Antarctic toothfish (Dissostichus mawsoni): Health risk assessment
Abstract: In the present study, the concentrations of total mercury in different organs of the ... Division 58.4.1 off the coast of Antarctica were determined. The results revealed total mercury ... concentrations of 0.165 ± 0.095 mg/kg (0.023–0.454 mg/kg) in the Antarctic toothfish. In fish muscle ... , methylmercury accounted for approximately 40% of the total mercury. In a comparison analysis, muscle and liver ...
Meeting Document : WG-FSA-17/P02 : Auteur(s): M. Yoon, M.-R. Jo, K.-T. Son, W.-S. Choi, S. I. Kang, S.-G. Choi, J. H. Lee and T. S. Lee
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Stock connectivity of Antarctic toothfish
, 48.4, 48.6, 88.1, 88.2 and 88.3, Divisions 58.4.1, 58.4.2 and 58.5.2, and the SPRFMO area north of ... be sequenced by Diversity Arrays to identify variable nucleotide SNPs sites. The analysis of SNPs ... indicated that the genetic structuring of Antarctic toothfish across the Southern Ocean is very weak. The ... sampled toothfish shared over 99.9% of the observed variation between sites. While some genetic ...
Meeting Document : WG-FSA-2019/P01 : Auteur(s): D. Maschette, S. Wotherspoon, A. Polanowski, B. Deagle, D. Welsford and P. Ziegler
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Mackerel icefish size and age at South Georgia and Shag Rocks
in the Southern Ocean have supported a fishery since the 1970s. This study has analysed the length ... modality in the length-frequency distributions. Lengths of age-classes derived by these two methods were ... differences in mortality between localities. To compensate for variation in the time of surveys, the mean TL ... of age-classes were standardized to a common day of the year (16 January) based on the Bertalanffy ...
Meeting Document : WG-EMM-03/7 : Auteur(s): A.W. North (United Kingdom)
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A LARGE-SCALE SURVEY OF ADÉLIE PENGUIN BREEDING DISTRIBUTION IN EAST ANTARCTICA
Abstract: A recent gap analysis of knowledge of the breeding distribution of the Adélie penguin ... across the Australian Antarctic Territory in east Antarctica found that approximately half of the species ... ’ potential breeding habitat had no evidence of ever being searched. With such incomplete knowledge of the ... distribution due to broad-scale environmental change, or to reliably estimate the current size of breeding ...
Meeting Document : WG-EMM-11/34 : Auteur(s): C. Southwell and L. Emmerson (Australia)
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Antarctic protected areas system: proposal for a new protected area at Edmonson Point, Wood Bay, Ross Sea
Abstract: The paper contains a proposal and draft management plan for a new Protected Area for ... Edmonson Point, Wood Bay, Ross Sea. This proposal has been submitted at the XVII ATCM, Cape Town, 24 May- 4 ... June 2004m (Document WP-007), for consideration as an Antarctic Specially Protected Area (ASPA). The ... ATCM established an Intersessional Contact Group to review the plan over 2004-05, a view to ...
Meeting Document : CCAMLR-XXIII/41 : Auteur(s): Delegation of Italy
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ACOUSTIC IDENTIFICATION AND SIZE ESTIMATION OF EUPHAUSIIDS
Abstract: Fishery for krill is a major economical activity in the Antarctic Ocean. The increased ... Norwegian fishery inherently gives Norway a responsibility to contribute to the management of the marine ... resources in the southern ocean. During the International Polar Year 2008, RV “G.O. Sars” spent 3 months in ... the Antarctic Ocean to do investigations on euphausiids and other key components of the ecosystem ...
Meeting Document : SG-ASAM-09/08 : Auteur(s): R. Korneliussen and G. Skaret (Norway)