Résultats de la recherche
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Killer whale (Orcinus orca) and sperm whale (Physeter macrocephalus) interactions with longline vessels in the Patagonian toothfish fishery at South Georgia, South Atlantic
obvious economic implications of fish loss due to depredation, ecological implications such as the effect ... of unrecorded fish removals on stock assessment models, modifications in the behaviour of marine ... of vessels that were licensed to fish at South Georgia is also shown for the different seasons ... operations occurred. KIW = Orcinus orca, SPW = Physeter macrocephalus. CPUE (kg/hook) CPUE (fish/1 000 ... report seeing sperm whales take either offal or discarded by-catch. Sperm whale depredation is usually ... Interactions between Cetaceans and Longline Fisheries (Apia, Samoa, November 2002) for extending an ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 111–126 : Auteur(s): Purves, M.G., D.J. Agnew, E. Balguerías, C.A. Moreno and B. Watkins
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Can we satisfactorily estimate variation in krill abundance?
: Knowledge of abundance and rates of change of abundance are basic requirements for fisheries models. Catch ... per unit effort (CPUE) has traditionally been used in demersal fisheries assessments as an estimator ... of abundance. It is less satisfactory for pelagic fisheries. Evidence is given that CPUE estimated ... abundance and rates of change of abundance are basic requirements for fisheries models. Catch per unit ... effort (CPUE) has traditionally been used in demersal fisheries assessments as an estimator of ... abundance. It is less satisfactory for pelagic fisheries. Evidence is given that CPUE estimated from data ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 375-376 : Auteur(s): Everson, I.
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Réglementation de la pêcherie de krill dans la zone de la CCAMLR
Abstract: The Commission currently manages toothfish, icefish and krill fisheries. However, after ... three decades of activity the management of these fisheries by CCAMLR can be seen to be developing ... be seen to differ from that implemented in other fisheries. This situation could be affecting the ...
Meeting Document : CCAMLR-XXXV/26 : Auteur(s): Delegación de Chile
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Élaboration de lignes directrices pour les coefficients de transformation dans les pêcheries nouvelles ou exploratoires de légine
factors for toothfish caught in New or Exploratory toothfish fisheries. As a consequence, it is likely ... , companies and Members that operate in these fisheries. These differences could potentially introduce ... and exploratory toothfish fisheries Microsoft Word File: e-cc-38-02.docx Approval: Approved ...
Meeting Document : CCAMLR-38/02 : Auteur(s): Delegation of New Zealand
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CCAMLR process of risk assessment to minimise the effects of longline fishing mortality on seabirds
Abstract: We describe the process used in the fisheries management system of the Convention for ... in reducing seabird bycatch levels in its longline fisheries. A combination of proven mitigation ... fisheries. Author(s): S.M. Waugh, G.B. Baker, R. Gales and J.P. Croxall (Mar. Pol., in press) Title ...
Meeting Document : WG-FSA-07/P2 : Auteur(s): S.M. Waugh, G.B. Baker, R. Gales and J.P. Croxall (Mar. Pol., in press)
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Review of research into seabird–fishery interactions
Abstract: Research into seabird interactions with fisheries was reviewed. Only recent research ... (post 1990), and in relation to direct effects of fishing through fisheries mortalities was considered ... New Zealand fisheries. Author(s): R. Alderman (New Zealand) Title: Review of research into seabird ...
Meeting Document : WG-FSA-05/42 : Auteur(s): R. Alderman (New Zealand)
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Quantifying uncertainty in the Chapman mark-recapture estimate of abundance
Abstract: In New and Exploratory fisheries for toothfish, mark-recapture plays a critical role to ... estimates, as often calculated for exploratory fisheries without integrated stock assessments. We also ... recommend that additional functions associated with mark-recapture analysis within CCAMLR’s fisheries be ...
Meeting Document : WG-FSA-15/49 : Auteur(s): P. Burch (Australia), S. Parker (New Zealand) and D. Welsford (Australia)
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Scientific Abstracts 1997
) ....................................... 7 Working Group on Fish Stock Assessment (WG-FSA)................. 29 Author Index ... _________________________________________________________________________________________ SC-CAMLR-XVI/BG/17 possibly influencing the size of fish caught. Intensive fishing for D ... fish in the South African zone at the Prince Edward Islands. The sanctioned fishery was conducted ... was noticed. The length- frequency distribution showed that fish caught at the Prince Edward Islands ...
Document : Site Section: Publications
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Estimation of natural mortality for the Patagonian toothfish at Heard and McDonald Islands using catch-at-age and aged mark-recapture data from the main trawl ground
to 2008. A large proportion of the recaptures of fish released in this fishery were aged and these ... McDonald Islands. Final Report, Fisheries Research and Development Council project 2008/046. file ... recaptures of fish released in this fishery were aged and these were used to obtain recapture numbers by age ... great majority of releases and recaptures of tagged fish were available. Two estimation models were ... intermittently fished trawl grounds. Very few of the fish released in Ground B were recap- tured in other ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 29–45 : Auteur(s): Candy, S.G., D.C. Welsford, T. Lamb, J.J. Verdouw and J.J. Hutchins
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Integrated stock assessment for the Heard Island and the McDonald Islands Patagonian toothfish (Dissostichus eleginoides) fishery (Division 58.5.2)
of the longline hauls into two sub-fisheries that were depth-stratified but not regionally-explicit ... . Alternative trawl sub-fisheries were evaluated within the assessment model in different scenarios. All ... small, however the selectivity functions for the different trawl sub-fisheries varied substantially ... indicating that a separation of the trawl sub-fisheries is appropriate. The scenario with estimating a YCS ...
Meeting Document : WG-FSA-13/24 : Auteur(s): P. Ziegler, S. Candy and D. Welsford (Australia)