Résultats de la recherche
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THE ANALYSIS OF FEEDING ACTIVITY AND DIET COMPOSITION OF ANTARCTIC TOOTHFISH D. MAWSONI IN THE ROSS AND AMUNDSEN SEAS IN THE FISHING SEASON, 2006-2007
Abstract: The results of analysis of stomachs of Antarctic toothfish D. mawsoni caught by the ... December, 2006 to 3 March, 2007 are presented. The comparative analysis of diet composition of Antarctic ... toothfish in different small-scale research units (SSRU) of subareas 88.1 and 88.2 is given. The graphs of ... size composition of food objects of Antarctic toothfish and the same by-caught objects are shown ...
Meeting Document : WG-FSA-08/41 : Auteur(s): N.V. Kokorin (Russia)
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Towards an assessment of the stock of the ommastrephid squid Martialia hyadesi in the Scotia Sea: data from predators
exploitation of the sub-Antarctic ommastrephid species Martialia hyadesi will be attempted in the future. This ... squid is an important component of the diet of several species of albatross and the southern elephant ... % of which is taken by southern elephant seals, and the other species may take at least a further 51400 ... 308016 tonnes per year. The proportion of total annual production of Martialia taken by predators cannot ...
Meeting Document : SC-CAMLR-IX/BG/13 : Auteur(s): Delegation of United Kingdom
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Effects of different harvesting strategies on the stock of Antarctic icefish Champsocephalus gunnari around South Georgia
Abstract: The effects of a number of harvesting strategies on the Antarctic icefish ... Champsocephalus gunnari have been simulated for a period of 30 years. These were- diffierent levels of constant ... fishing mortality (F0.1, Fmax, 2xFmax),- harvesting contantly at 50%F0.1 with an increase of F 3 or 6 ... years after a good recruitment,- pulse fishing at an interval of 3 years with no fishing in between;- a ...
Meeting Document : SC-CAMLR-VIII/BG/47 : Auteur(s): Delegation of Federal Republic of Germany
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The Use of Penguin Stomachal Contents for the Simultaneous Study of Prey and Predator Parameters
assumptions made in the analysis of data. Nested designs are proposed as the correct approach because lack of ... independence between krill found in the stomach of a given penguin prevents the pooling of krill lengths from ... highly significant linear regression between krill size and time was found. Full use of the information ... contained in stomachal contents requires the use of block sampling designs. Replicating samples of the same ...
Meeting Document : WG-CEMP-89/16 : Auteur(s): E. Marschoff and B. González (Argentina)
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Recent trends in numbers of four species of penguins at the Prince Edward Islands
Abstract: Four species of penguin breed regularly at South Africa’s Prince Edward Islands: king ... pairs of king penguins were incubating eggs at Marion Island, the larger of the two islands in the group ... in numbers of king penguin chicks that survived to the end of the winter period, but there was ... considerable fluctuation in chick production in the 1990s. It was roughly estimated that on average 88% of king ...
Meeting Document : WG-EMM-10/P01 : Auteur(s): R.J.M. Crawford, P.A. Whittington, L. Upfold, P.G. Ryan, S.L. Petersen, B.M. Dyer and J. Cooper
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Feasibility of lead-radium dating the otoliths of blackfin icefish (Chaenocephalus aceratus) and ocellated icefish (Chionodraco rastrospinosus)
Abstract: Application of lead-radium dating was attempted as a feasibility study for otoliths of ... otoliths from these fishes were small and the number of otoliths available low, a whole otolith application ... determining the parameters of future applications that would lead to a validation of age. In the current study ... levels, led to age determinations that had a high margin of uncertainty; however, the findings led to an ...
Meeting Document : WG-FSA-10/17 : Auteur(s): A.H. Andrews, M. La Mesa and J. Ashford (USA)
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Investigation of potential biases in the assessment of Antarctic toothfish in the Ross Sea fishery using outputs from a spatially explicit operating model
-recapture data, and rely on the assumption that tagged and untagged fish have constant probabilities of ... recapture regardless of the spatial distribution of releases or subsequent fishing effort for recaptures ... that fishing effort for recaptures is distributed in proportion to the underlying abundance. Neither of ... these conditions are likely to occur in practice, and violation of this assumption may lead to bias. In ...
Meeting Document : WG-SAM-13/36 : Auteur(s): S. Mormede and A. Dunn (New Zealand)
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The 2013 annual random stratified trawl survey to estimate the abundance of Dissostichus eleginoides and Champsocephalus gunnari in the waters of Heard Island (Division 58.5.2)
(HIMI) was completed during April of 2013. The catches of D. eleginoides for 2013 were half that of 2012 ... times the long term average. Catches of Channichthys rhinoceratus were higher and those of ... take. The catch of invertebrates in the 2013 survey was 6 t, which was lower than the long term average ... . This year there was a large abundance of jellyfish (Cnidaria) which formed about half of the catch of ...
Meeting Document : WG-FSA-13/21 : Auteur(s): G.B. Nowara, T.D. Lamb and D.C. Welsford (Australia)
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The 2014 annual random stratified trawl survey in the waters of Heard Island (Division 58.5.2) to estimate the abundance of Dissostichus eleginoides and Champsocephalus gunnari
Abstract: The annual random stratified trawl survey (RSTS) at HIMI was conducted during June of ... 2014, with the completion of 158 stations. An additional five stations were completed at Shell Bank ... , which had not been sampled since 2005. The catches of C. gunnari were less than half of those in 2013 ... , but catches of both D. eleginoides and C. gunnari were higher than the long-term average (2006-2013 ...
Meeting Document : WG-FSA-14/41 : Auteur(s): G.B. Nowara, T.D. Lamb and D.C. Welsford (Australia)
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Scientific background document in support of the development of a CCAMLR MPA in the Weddell Sea (Antarctica) – Version 2016 – Part C: Data analysis and MPA scenario development
) the scientific background and justification for the development of a marine protected area (MPA) in ... general context of the establishment of CCAMLR-MPAs and provides the background information on the Weddell ... -16/03 (Part C) describes the methods and the results of the scientific analyses as well as the ... development of the objectives and finally of the borders for the WSMPA. Earlier versions of Parts A-C were ...
Meeting Document : WG-EMM-16/03 : Auteur(s): K. Teschke, H. Pehlke, M. Deininger and T. Brey on behalf of the German Weddell Sea MPA project team