Résultats de la recherche
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UPDATE ON ITEMS OF INTEREST TO WG-IMAF
potential for use in the CCAMLR context. Author(s): N. Walker (New Zealand) Title: UPDATE ON ITEMS OF ... Economic Zone that are relevant to the work of WG-IMAF. These developments include refinement of the ... requirement of fishing practices to reduce seabird bycatch by surface longline vessels and the introduction of ... regulations to reduce seabird bycatch by bottom longline vessels. The bycatch of seabirds by fisheries within ...
Meeting Document : WG-FSA-08/47 : Auteur(s): N. Walker (New Zealand)
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Distributions and predator-prey interactions of macaroni penguins, Antarctic fur seals, and Antarctic krill near Bird Island, South Georgia
between the distributions of predators and their prey with respect to the abundance of krill in the water ... macaroni penguins were concentrating their foraging for krill in the vicinity of the shelf-break. Author(s ... Abstract: We studied the distributions, abundances and interactions of macaroni penguins Eudyptes ... transects radiating from the breeding colonies of the vertebrate predators. We examined the relationships ...
Meeting Document : WG-CEMP-93/12 : Auteur(s): G.L. Hunt, Jr (USA), D. Heinemann (USA) and I. Everson (United Kingdom)
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A method for inferring movement rates of fish from mark–recapture data
release and the recapture. In addition, the intensity of fishing effort (i.e. sampling) by location and ... required for the probability of recapture in a location to match the relative probability of catching an ... Abstract: This paper presents methods to infer the rate of movement of fish that are marked ... , released, and subsequently captured. The information that is available is the location and date of the ...
Meeting Document : WG-FSA-05/66 : Auteur(s): C. Wilcox (Australia)
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Molecular analysis of stomach contents from Antarctic toothfish (Dissostichus mawsoni) collected from Area 58 and 88 from 2016 to 2018
between two species appear to be related to the size of D. mawsoni. Many of fish taxa in the stomach of D ... (~600 bp) in this study may not have enough size for the clear analysis of haplotypes. Further study ... , which is native to the Southern Ocean. Although it plays an important role in the Antarctic ecosystem ... , the ecology of D. mawsoni is still fragmental mainly due to the limited accessibility for the sample ...
Meeting Document : WG-FSA-2019/37 : Auteur(s): S.R. Lee, S.-G. Choi, S. Chung, D.H. An and H.-W. Kim
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AMLR Hydroacoustic Survey System Description of Methods, A Case Study
Abstract: The AMLR hydroacoustic system used for surveys in the vicinity of Elephant Island and ... ensures data integrity and repeatability of analytic results. The variability inherent in the distribution ... King George Island during 1987-1989 has hardware and software components. The method of analysis ... proceeds from the basic integration data (lm bins by 1min outputs) to the stratification of these data into ...
Meeting Document : WG-KRILL-89/10 : Auteur(s): M.C. Macaulay (USA)
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Influence of data quality and quantity from a multiyear tagging program on an integrated fish stock assessment
, particularly the effects of the size of tagged fish compared with the size of fish in the catch (tag size ... , fishing, and data collection, this study investigated how the bias and precision of biomass estimates from ... -overlap), numbers of tagged fish, duration of the tagging program, using catch-at-length or catch-at-age ... relatively large number of size classes, low recapture numbers collected in short tagging programs with a 100 ...
Meeting Document : WG-FSA-13/P03 : Auteur(s): P. Ziegler
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Distribution and ecology of Chaenocephalus aceratus (Channichthyidae) around South Georgia and Shag Rocks (Southern Ocean).
Abstract: Chaenocephalus aceratus (Family Channicthyidae) is one of the dominant species of ... demersal fish living on the South Georgia shelf where it is caught in low numbers as by-catch in the ... that growth was fast in the first five years with males and females attaining lengths at first spawning ... of 440 mm TL and 520 mm TL. The diet was comprised of fish and crustaceans, with an ontogenetic shift ...
Meeting Document : WG-FSA-07/P5 : Auteur(s): W.D.K Reid, S. Clarke, M.A. Collins and M. Belchier. (Polar Biol., 30 (12): 1523–1533 (2007))
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Fitting a von Bertalanffy growth model to length-at-age data accounting for length-dependent fishing selectivity and length-stratified sub-sampling of length frequency samples
Abstract: Response-biased sampling in the context of regression modelling occurs when sample ... units are selected with a probability that is a function of the response. In sampling to obtain fish to ... process involving a particular gear, and (ii) the method of on-deck sub-sampling fish for ageing from the ... random length frequency sample. When the selectivity of the gear combined with availability of fish to be ...
Meeting Document : WG-FSA-SAM-05/13 : Auteur(s): S.G. Candy (Australia)
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Re-organisation of WG-FSA Report
restructure the WG-FSA report. In early 2004, the extend and nature of the work required was developed in ... Abstract: In 2003, WG-FSA and the Scientific Committee identified the need to rewrite and ... consultation between the Conveners of WG-FSA and WG-IMAF, and the Chair of the Scientific Committee ... Everson to develop certain elements of the restructure (see SC CIRC 04/11 and 04/16). Dr Everson’s first ...
Meeting Document : WG-FSA-SAM-04/06 : Auteur(s): CCAMLR Secretariat
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Acoustic discrimination of southern ocean zooplankton
Abstract: Acoustic surveys in the vicinity of the sub-Antarctic island of South Georgia revealed ... the existence of a number of horizontally extensive yet vertically discrete scattering layers in the ... upper 250 m of the water column. These layers were fished with a LonghurstHardy plankton recorder (LHPR ... each scattering layer was composed predominantly of a single species of either the euphausiids ...
Meeting Document : WG-EMM-97/54 : Auteur(s): Watkins, J.L., Brierley, A.S., Goss, C., Ward, P.