Resultados de la búsqueda
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Detection of systematic change in Adélie penguin foraging trip duration: consequences of high inter-annual variability and usefulness of ice cover as a covariate
Abstract: Power analyses were carried out using a 12 year data set from the Béchervaise Island ... change were investigated: 1) change occurring at a constant rate after a certain point in time and 2) a ... the latter form could be more quickly and powerfully detected at a range of effect sizes than could ... three foraging trips each were required to detect a 35% step increase in foraging trip duration after ...
Meeting Document : WG-EMM-05/22 : Autor(es): J. Clarke, C. Southwell and L.M. Emmerson (Australia)
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A possible framework in which to consider plausible models of the Antarctic marine ecosystem for evaluating krill management procedures
Abstract: CCAMLR requires an assessment method for recommending a subdivision of the krill catch ... agreed workplan for developing a management procedure includes the evaluation of candidate management ... procedures in a simulation framework, using plausible models of the Antarctic marine ecosystem. This paper ... develops a framework for erecting such models. It is divided into three main parts, addressing different ...
Meeting Document : WG-EMM-04/24 : Autor(es): A. Constable (Australia)
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Fish Heaven: a Monte Carlo, spatially explicit single species fishery model for the testing of parameter estimation methods
Abstract: Fish Heaven is a simple spatially explicit age structured fish model, containing the ... basic features of standard fish modeling with a number of optional extras. It was designed within an ... object oriented framework to allow for the possible extension in a number of directions. In particular it ... various plausible spatial structures of fish stock. The model has a simple age and space structured ...
Meeting Document : WG-FSA-00/36 : Autor(es): I. Ball and A. Constable (Australia)
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Reduced bait loss and bycatch of seabirds in longlining by using a seabird scarer
Abstract: Although longlining is regarded as a highly conservation oriented method of fishing ... , bycatch of seabirds on longlines is a problem in certain seasons and areas. Birds feeding on the bait ... eventually give high mortalities considering the large amounts of hooks used. Both from a fishery and bird ... conservation point of view there is a strong incentive to solve this problem. This paper describes trials with ...
Meeting Document : WG-IMALF-94/09 : Autor(es): S. Løkkeborg and Å. Bjordal (Norway)
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Bias in the estimation of krill yield from using a deterministic formulation of the median unexploited spawning biomass
, while the second is a generalised yield model. The decision rules relate to the effects of a specified ... long-term annual yield (γ) on (i) the probability of the spawning stock being reduced below a set ... proportion of SB0 during a projection run (probability of critical depletion) and (ii) the median status of ... the spawning stock (as a proportion of SB0) at the end of the projection run (level of escapement ...
Meeting Document : WG-EMM-97/45 : Autor(es): de la Mare, W.K., Constable, A.J.
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Research plan for the exploratory longline fishery for Dissostichus spp. in 2012/13 in Division 58.4.3a (this is a revision of WG-SAM-12/14)
Abstract: In 2011/2012, a French vessel conducted its first exploratory fishing campaign in ... division 58.4.3a. In order to achieve a robust stock assessment that would provide advice on catch limits ... years. This paper is a revised proposal of WG-SAM-12/14 encouraged by 2012 SAM working group for a ... detailed catch, effort and biological data with a nearly same survey design as in the 2012. It will include ...
Meeting Document : WG-FSA-12/29 : Autor(es): A. Rélot-Stirnemann (France)
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Results of a CCAMLR sponsored research survey to monitor abundance of subadult Antarctic toothfish in the southern Ross Sea, February 2013
Abstract: At its 2011 meeting, the Scientific Committee agreed that a time series of relative ... abundance from a well-designed survey could be a useful input into the Ross Sea stock assessment model. The ... second survey in the time series. The objectives of this second survey were: To carry out a longline ... survey to monitor subadult toothfish in the southern Ross Sea (strata A–C) using standardised gear in a ...
Meeting Document : WG-SAM-13/32 : Autor(es): S.J. Parker, S.M. Hanchet, S. Mormede, A. Dunn (New Zealand) and R. Sarralde (Spain)
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Elaborating a representative system of marine protected areas in eastern Antarctica, south of 60°S
conservation of marine biodiversity by 2012. A representative system of marine protected areas (RSMPA) will be ... one that (i) provides a spatial estate of the smallest area sufficient to satisfy the principles of ... will be increased if it (iv) can act as a source for maintaining biodiversity in areas outside of the ... system, (v) can act as a reference for natural variability and change, and (vi) provides for ecosystem ...
Meeting Document : WG-EMM-10/26 : Autor(es): A.J. Constable, B. Raymond, S. Doust, D. Welsford and K. Martin-Smith (Australia)
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Results of a research survey to monitor abundance of pre-recruit Antarctic toothfish in the southern Ross Sea, February 2012
Abstract: At its 2011 meeting, the Scientific Committee agreed that a time series of relative ... recruitments from a well-designed survey could be a useful input into the Ross Sea stock assessment model and ... endorsed a proposal to carry out this work once the fishery had closed at the end of the 2011/12 season ... . The survey had two main objectives: (i) To establish the feasibility of developing a time series of ...
Meeting Document : WG-SAM-12/29 : Autor(es): S.M. Hanchet, S. Mormede, A. Dunn (New Zealand) and H.-S. Jo (Republic of Korea)
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Report from a krill- focused survey with RV Kronprins Haakon and land-based predator work in Antarctica during 2018/19
Abstract: The primary objective for this krill research activity was twofold 1) to conduct a ... essential for the implementation of a Feed-Back Management (FBM) system. The survey follows a similar design ... as a survey initiated by CCAMLR in year 2000 for comparative purposes, but in addition focuses on ... , availability and predator needs as opposed to purely conservation-based measures. A future developed FBM system ...
Meeting Document : WG-EMM-2019/07 : Autor(es): B. Krafft, K. Bakkeplass, T. Berge, M. Biuw, J. Erices, E. Jones, T. Knutsen, R. Kubilius, M. Kvalsund, U. Lindstrøm, G.J. Macaulay, A. Renner, A. Rey, H. Søiland, R. Wienerroither, H. Ahonen, J. Goto, N. Hoem, M. Huerta, J. Höfer, O. Iden, W. Jouanneau, L. Kruger, H. Liholt, A. Lowther, A. Makhado, M. Mestre, A. Narvestad, C. Oosthuisen, J. Rodrigues and R. Øyerhamn