Résultats de la recherche
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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
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An alternative method for estimating the level of illegal fishing using simulated scaling methods on detected effort
Paper Title: An alternative method for estimating the level of illegal fishing using simulated ... effort is put forward. The results from this new method are similar to those of the Agnew and Kirkwood ... (2005) method, and this suggests that the current method is adequate under circumstances of low evasion ... performs better in the case of zero detections and can potentially better handle the evasion of detection ... Alternative method for estimating the level of illegal fi shing Introduction This paper considers methods ... modelling framework of this paper, particularly with regard to the behaviour of vessels when detected ... this paper, the only type of observation con- sidered here is that reported by a fi shery patrol ... ’ problem. This problem is also described and examined. The discussion section of the paper suggests ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 143–161 : Auteur(s): Ball, I
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Detection and quantitative estimation of krill concentrations by hydroacoustic instruments
Paper Title: Detection and quantitative estimation of krill concentrations by hydroacoustic ... instruments Abstract / Description: The limited capabilities of existing hydroacoustic instruments in ... detecting dispersed and surface concentrations of krill lead to considerable underestimates of krill biomass ... in areas surveyed. The task of detecting surface concentrations of krill can be solved with the help ... ESTIMATION OF KRILL CONCENTRATIONS BY HYDROACOUSTIC INSTRUMENTS K.I. Yudanov (U.S.S.R.) Abstract The ... limited capabilities of existing hydroacoustic instruments in detecting dispersed and surface ... concentrations of krill lead to considerable underestimates of krill biomass in areas surveyed. The task of ... detecting surface concentrations of krill can be solved with the help of towed acoustic antennae. The ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 123-139 : Auteur(s): Yudanov, K.I.
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Improving estimates of Adélie penguin breeding population size: developing factors to adjust one-off population counts for availability bias
Paper Title: Improving estimates of Adélie penguin breeding population size: developing factors ... presented for the collection and development of data to adjust counts of Adélie penguins made at any time in ... the breeding season to an estimate of the breeding population. The development of ‘availability ... adjustment factors’ involves the collection of time-series counts of population objects, such as adults ... compan- ion paper (McKinlay et al., 2010). material and methods Relevant aspects of Adélie penguin ... ImprovIng estImates of adélIe penguIn breedIng populatIon sIze: developIng factors to adjust one-off ... Australian Antarctic Division Department of Environment, Water, Heritage and the Arts 203 Channel Highway ... methods are presented for the collection and development of data to adjust counts of Adélie penguins made ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 229–241 : Auteur(s): Southwell, C., J. McKinlay, L. Emmerson, R. Trebilco and K. Newbery
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Determination of Antarctic krill acoustic back-scattering cross-section
Paper Title: Determination of Antarctic krill acoustic back-scattering cross-section Abstract ... / Description: When determining the density krill of concentrations it is necessary to know the acoustic cross ... -section of back-scattering of krill. The target strength can be determined in situ by measuring the echo ... signal from one specimen resolved by the hydroacoustic instrument. By calculating the mean level of the ... - 141 - SC-CAMLR-V/BG/27 DETERMINATION OF ANTARCTIC ... When determining the density krill of concentrations it is necessary to know the acoustic cross ... -section of back-scattering of krill. The target strength can be determined in situ by measuring the echo ... signal from one specimen resolved by the hydroacoustic instrument. By calculating the mean level of the ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 141-152 : Auteur(s): Protaschuk, V.A. and T.A. Lukashova
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Movement, growth and available abundance to the fishery of Dissostichus eleginoides Smitt, 1898 at Heard Island, derived from tagging experiments
Paper Title: Movement, growth and available abundance to the fishery of Dissostichus eleginoides ... the Kerguelen Plateau has not been investigated. This paper examines the assumptions of stock ... Smitt, 1898 at Heard Island, derived from tagging experiments Abstract / Description: tocks of ... Patagonian toothfish (Dissostichus eleginoides) in different sectors of the Southern Ocean are considered to ... investigated. This paper examines the assumptions of stock separation using tagged fi sh from the fi shery ... vary within and between seasons. In this paper the combined function of gear selectivity and ... , Vol. 9 (2002): 33–48 33 MOVEMENT, GROWTH AND AVAILABLE ABUNDANCE TO THE FISHERY OF DISSOSTICHUS ... . Lamb Australian Antarctic Division Abstract Stocks of Patagonian toothfi sh (Dissostichus eleginoides ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 33–48 : Auteur(s): Williams, R., G.N. Tuck, A.J. Constable and T. Lamb
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Fatty acid and stable isotope analyses to infer diet of Antarctic toothfish caught in the southern Ross Sea
Paper Title: Fatty acid and stable isotope analyses to infer diet of Antarctic toothfish caught ... compared to lipid profiles of fish and invertebrate species taken as by-catch in the fishery or collected ... from the stomachs of toothfish. Stable carbon and nitrogen isotope ratios were also determined to ... further identify feeding relationships between these species. The aim of this study was to establish the ... analysis is not presented in this paper. Only the fleshy tissue of animals was prepared for FA and ... Science, Vol. 20 (2013): 21–36 21 FATTY ACID AND STABLE ISOTOPE ANALYSES TO INFER DIET OF ANTARCTIC ... -705 Republic of Korea S.M. Hanchet National Institute of Water and Atmospheric Research (NIWA) Ltd ... Fisheries Research and Development Institute 408-1, Sirang-ri, Gijang-eup, Busan 619-705 Republic of ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 21–36 : Auteur(s): Jo, H.-S., I. Yeon, C. Lim, S.M. Hanchet, D.-W. Lee and C.-K. Kang