Résultats de la recherche
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Biomass, abundance and distribution of fish in the Kerguelen Islands EEZ (CCAMLR Statistical Division 58.5.1)
Paper Title: Biomass, abundance and distribution of fish in the Kerguelen Islands EEZ (CCAMLR ... conducted from September to October 2006 in the northern part of the Kerguelen Plateau (CCAMLR Statistical ... stratified stations. Estimates of biomass and abundance were produced for eight commercial species. The total ... biomass was 245 000 tonnes and Patagonian toothfish (Dissostichus eleginoides) accounted for half of the ... , ABUNDANCE AND DISTRIBUTION OF FISH IN THE KERGUELEN ISLANDS EEZ (CCAMLR STATISTICAL DIVISION 58.5.1) G ... in the northern part of the Kerguelen Plateau (CCAMLR Statistical Division 58.5.1). The swept-area ... method was used in the depth range from 100 to 1 000 m with 207 random stratified stations. Estimates of ... and Patagonian toothfish (Dissostichus eleginoides) accounted for half of the value (124 000 tonnes ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 1–32 : Auteur(s): Duhamel, G. and M. Hautecoeur
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A stock assessment model of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea Region incorporating multi-year mark-recapture data
Paper Title: A stock assessment model of Antarctic toothfish (Dissostichus mawsoni) in the Ross ... since the late 1990s. No fishery-independent methods of monitoring stock abundance were plausible, and ... . Although tagging experiments are commonly used for assessing fish stocks, most rely on estimates of ... of tagged fish and subsequent multi-year data of recapture of tagged fish in conjunction with fishery ... of this paper is to report on the development of a population model which explicitly deals with ... paper outlines the development of a Bayes- ian sex- and age-structured population stock assess- ment ... available. The model described in this paper is sufficiently flexible to be used for a wide range of other ... Toothfish are large Nototheniids endemic to Antarctic and sub-Antarctic waters. There are two species of ...
Science Journal Paper : CCAMLR Science, Volume 21 (CCAMLR Science, Volume 21) : 39–62 : Auteur(s): Mormede, S., A. Dunn and S.M. Hanchet
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A hybrid approach to acoustic classification and length estimation of krill
Paper Title: A hybrid approach to acoustic classification and length estimation of krill Abstract ... / Description: The problem of acoustically identifying and estimating the sizes of two euphausiid species is ... components are the mean ratios of the volume backscattering coefficients, measured at two different ... individually for each component of a vector, using classical Bayesian techniques. Classification probabilities ... of data to design the classifi er. The acoustic and net sample data used in this paper were ... . 11 (2004): 33–58 33 A HYBRID APPROACH TO ACOUSTIC CLASSIFICATION AND LENGTH ESTIMATION OF KRILL ... problem of acoustically identifying and estimating the sizes of two euphausiid species is considered. A ... mean ratios of the volume backscattering coeffi cients, measured at two different frequencies. The ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 33–58 : Auteur(s): Azzali, M., I. Leonori and G. Lanciani
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An overview of Southern Ocean zooplankton data: abundance, biomass, feeding and functional relationships (submitted to the 2008 Joint CCAMLR-IWC Workshop)
Paper Title: An overview of Southern Ocean zooplankton data: abundance, biomass, feeding and ... an enormous amount of data on Southern Ocean (SO) zooplankton, mostly on their distribution with a ... assist SO food-web modellers or those with limited specialist knowledge of SO zooplankton. First, a brief ... overview is provided of the diversity and basic biology of SO zooplankton, with an emphasis on abundance ... -year history of active research on Southern Ocean (SO) zooplankton, several thousand papers have ... Science, Vol. 19 (2012): 171–218 171 AN OVERVIEW OF SOUTHERN OCEAN ZOOPLANKTON DATA: ABUNDANCE ... 3DH United Kingdom B.P.V. Hunt and E.A. Pakhomov Department of Earth and Ocean Sciences ... University of British Columbia 6339 Stores Road Vancouver, B.C. Canada, V6T 1Z4 G.W. Hosie Department ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 171–218 : Auteur(s): A. Atkinson, P. Ward, B.P.V. Hunt, E.A. Pakhomov and G.W. Hosie
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An index of per capita recruitment
Paper Title: An index of per capita recruitment Abstract / Description: An index of per capita ... recruitment (PCR) is proposed such that where R 1 is the proportion of age-l animals sampled in year y and M ... is the post-recruit mortality rate. The intent of the index is to facilitate investigation of ... reproductive success and the factors postulated to affect it. The formulation of PCR is based on the ... population and the proportion of age-2 animals that are not spawning. In this paper I have used the simpler ... AN INDEX OF PER CAPITA RECRUITMENT R. Hewitt Southwest Fisheries Science Center PO Box 271, La ... Jolla, Ca. 92038, USA Abstract An index of per capita recruitment (PCR) is proposed such that ... where R1 is the proportion of age-l animals sampled in year y and M is the post-recruit mortality rate ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 179–196 : Auteur(s): Hewitt, R
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A risk-management framework for avoiding significant adverse impacts of bottom fishing gear on Vulnerable Marine Ecosystems
Paper Title: A risk-management framework for avoiding significant adverse impacts of bottom ... measure in 2007 to ensure that significant adverse impacts of bottom fishing gear on Vulnerable Marine ... Ecosystems (VMEs) are avoided. Due to the high levels of uncertainty surrounding both the evidence of VME ... presence and the consequences of interaction with different types of gear, a risk-management framework is ... -MANAGEMENT FRAMEWORK FOR AVOIDING SIGNIFICANT ADVERSE IMPACTS OF BOTTOM FISHING GEAR ON VULNERABLE ... MARINE ECOSYSTEMS K. Martin-Smith Australian Antarctic Division Department of the Environment, Water ... impacts of bottom fishing gear on Vulnerable Marine Ecosystems (VMEs) are avoided. Due to the high levels ... of uncertainty surrounding both the evidence of VME presence and the consequences of interaction ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 177–193 : Auteur(s): Martin-Smith, K
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Assessments of by-catch in trawl fisheries at Heard and McDonald Islands
Paper Title: Assessments of by-catch in trawl fisheries at Heard and McDonald Islands Abstract ... (Statistical Division 58.5.2) to significantly affect, in the long term, spawning biomass of three taxa caught ... skates). The long-term annual yield for each of the three taxa was estimated using the generalised yield ... biomass estimates from surveys in the region from 1990 to 1993 and a limited amount of biological data ... -exploitation of the by-catch species. This paper aims to provide a preliminary assessment of whether the by ... provisions may not be required to * Note that the estimates of precautionary yield for C. of this paper ... ASSESSMENTS OF BY-CATCH IN TRAWL FISHERIES AT HEARD AND MCDONALD ISLANDS A.J. Constable, R. Williams and ... (Statistical Division 58.5.2) to significantly affect, in the long term, spawning biomass of three taxa caught ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 231–243 : Auteur(s): Constable, A.J., R. Williams and W.K. de la Mare
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Estimation of effective sample size for catch-at-age and catch-at-length data using simulated data from the Dirichlet-multinomial distribution
Paper Title: Estimation of effective sample size for catch-at-age and catch-at-length data using ... simulated data from the Dirichlet-multinomial distribution Abstract / Description: The incorporation of ... ‘effective sample size’ (ESS) in integrated assessments is an approximate but simple way of modelling the ... distribution of catch-at-age or catch-at-length frequencies using a multinomial likelihood when there is extra ... level (i.e. frequencies aggregated across hauls). This paper examines four methods of estimation using ... Estimation of EffEctivE samplE sizE for catch-at-agE and catch-at-lEngth data using simulatEd data from ... thE dirichlEt-multinomial distribution S.G. Candy Department of the Environment, Water, Heritage ... Email – steve.candy@aad.gov.au Abstract The incorporation of ‘effective sample size’ (ESS) in ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 115–138 : Auteur(s): Candy, S.G
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Indices of prey availability near the Seal Island CEMP site: 1990 to 1996
Paper Title: Indices of prey availability near the Seal Island CEMP site: 1990 to 1996 Abstract ... / Description: Four indices of prey availability are calculated from surveys conducted in the vicinity of the ... Seal Island CEMP site during the austral summers of 1990 to 1996. The indices are measures of average ... surveys each year were subsampled to include the foraging range of predators breeding at Seal Island ... pattern and energy value. In this paper, indices are proposed for the first four of these aspects of ... averaged over each 100 m of distance along the trackline. For the purposes of this paper, mean volume ... CCAMLR Science, Vol. 4 (1997): 37-45 INDICES OF PREY ... Fisheries Science Center PO Box 271, La Jolla CA 92038, USA Abstract Four indices of prey ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 37–45 : Auteur(s): Hewitt, R.P., G. Watters and D.A. Demer
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Vertical migrations of mackerel icefish (Champsocephalus gunnari) on the South Georgia shelf
Paper Title: Vertical migrations of mackerel icefish (Champsocephalus gunnari) on the South ... considered in the paper. A distinct pattern of daily vertical migrations of C. gunnari was observed on the ... Georgia shelf Abstract / Description: High values of coefficient of variation resulting from the ... calculation of mackerel icefish biomass (Champsocephalus gunnari) from trawl survey data on the South Georgia ... Fish. Tech. Pap. No. 171: 76. 7 00 Table 1: Catches of Champsocephalus gunnari (tonnes per ... WG-FSA-91/6 VERTICAL MIGRATIONS OF MACKEREL ICEFISH ... values of coefficient of variation resulting from the calculation of mackerel icefish biomass ... rationale for round-the-clock trawling and call for clarification of the techniques used. The objective of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 3–14 : Auteur(s): Frolkina, J.A. and V.I. Shlibanov