Résultats de la recherche
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Draft Krill Fishery Report
Abstract: At WG-EMM 2013 the Working Group agreed that it would be useful to have a consolidated ... summary of information related to the krill fishery in a similar format to the fishery reports that are ... the preparation of a draft krill fishery report for consideration at WG EMM-14 that would be similar ... in content to a finfish Fishery Report. The following compilation of information on the krill fishery ...
Meeting Document : WG-EMM-14/58 : Auteur(s): Secretariat
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DRAFT SOFTWARE USER GUIDE FOR: ICESCAPE: INTEGRATING COUNT EFFORT BY SEASONALLY CORRECTING ANIMAL POPULATION ESTIMATES
Abstract: The ICESCAPE Software Users Guide (Appendix 1) describes a parametric bootstrap ... (2004) for Antarctic land-breeding predators. The software, which was developed as a suite of routines ... a breeding cycle when the availability fraction is substantially different from unity. Adjustment ... for availability standardises counts to a common reference point of breeding chronology, and is ...
Meeting Document : WG-SAM-09/16 : Auteur(s): J. McKinlay, C. Southwell and R. Trebilco (Australia)
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UPDATED BIOLOGICAL PARAMETERS FOR THE ANTARCTIC STARRY SKATE, AMBLYRAJA GEORGIANA, FROM THE ROSS SEA
Ross Sea were identified to species. Sample sizes were small, but indicated a ratio of 10.75:1 of ... Amblyraja georgiana to B. cf. eatonii, which is consistent with a previous estimate based on a large sample ... length-weight regression relationships for male and female A. georgiana confirmed that male and female ... relationships differ significantly. Better estimates of median length at maturity were made possible through a ...
Meeting Document : WG-FSA-08/20 : Auteur(s): M.P. Francis and S. Mormede (New Zealand)
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Influence of tag numbers, size of tagged fish, duration of the tagging program, and auxiliary data on bias and precision of an integrated stock assessment
Abstract: Using a modeling framework for toothfish population dynamics, fishing and data ... collection, this study investigated how the bias and precision of a CASAL assessment is influenced by various ... aspects of a tagging program, in particular the effects of the numbers of fish tagged, the duration of a ... simulation study indicated that: (1) A high tag size-overlap (at least 60%, better 100%) and high tagging ...
Meeting Document : WG-SAM-12/24 : Auteur(s): P.E. Ziegler (Australia)
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THE RISKS OF NOT DECIDING TO ALLOCATE THE PRECAUTIONARY KRILL CATCH LIMIT AMONG SSMUS AND ALLOWING UNCONTROLLED EXPANSION OF THE KRILL FISHERY UP TO THE TRIGGER LEVEL
risks associated with three options for a Stage-1 allocation of the precautionary krill catch limit ... among SSMUs in Subareas 48.1-48.3, it was suggested that a comprehensive assessment of the risks that ... might be incurred by not deciding on such an allocation (i.e., a risk assessment of status quo ... results provided from multiple parameterizations of the same model, and present such a risk assessment ...
Meeting Document : WG-EMM-09/12 : Auteur(s): G.M. Watters (USA), S. Hill (United Kingdom), J.T. Hinke (USA) and P. Trathan (United Kingdom)
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THE POWER OF ECOSYSTEM MONITORING
power) to detect effects that trigger management action. 2. Using data from a long-term ecosystem ... monitoring programme of the predators of Antarctic krill Euphausia superba at South Georgia together with a ... effects of fishing using either the krill population or a combined predator response index was low (20–40 ... % power after 20 years with the probability of a type I error (α) = 0.05). The power increased to >50 ...
Meeting Document : WG-EMM-08/P11 : Auteur(s): K. Reid, J.P. Croxall and E.J. Murphy
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Proposal for an extension to the mark recapture experiment to estimate toothfish population size in Subarea 48.4
Abstract: 1. So far a total of 929 D. eleginoides have been tagged and released at Subarea 48.4 ... and 25 tagged fish have been recaptured, including 23 during the latest season. 2. A preliminary ... assessment of D. eleginoides stock size in the Northern Area of 48.4 estimates a vulnerable biomass of ... 48.4 in the 2008/09 fishing season so as to allow for a full assessment of D. eleginoides stock size in ...
Meeting Document : WG-FSA-08/46 : Auteur(s): J. Roberts and D. J. Agnew (UK)
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Potential climate change effects on the habitat of Antarctic krill
resource and a major prey item for many fish, birds and mammals in the Southern Ocean. The fishery and the ... used a statistical model linking Antarctic krill growth to temperature and chlorophyll concentration to ... sector into two zones: A band around the Antarctic Circumpolar Current in which habitat quality is ... particularly vulnerable to warming; and a southern area which is relatively insensitive. Our analysis suggests ...
Meeting Document : WG-EMM-13/20 : Auteur(s): S.L. Hill, T. Phillips and A. Atkinson (United Kingdom)
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Chiller killers – first steps towards identifying krill pathogens
Abstract: Antarctic Krill (Euphausia superba) is a ‘keystone species’ in the Southern Ocean ... remains a deficit area with little to nothing known about infection dynamics. Over the past century the ... waters of Antarctic krill northern distribution limit have experienced significant warming. In a changing ... across an altered geographic range. In this paper we present the initial findings from a histological ...
Meeting Document : WG-EMM-15/23 : Auteur(s): K. Bateman, R. Hicks, G. Tarling, M. Soeffker and G. Stentiford (United Kingdom)
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New Zealand submission for the trial of the CCAMLR observer training program accreditation scheme
presented in SC-CAMLR-XXX/08, and invited Members to participate in a trial of the initial review and ... technical peer review. These are described in Parts a–c of the proposed procedure for a CCAMLR observer ... Scientific Observation (SISO), it is important that observers working in CCAMLR fisheries operate to a ... consistent set of standards. In an effort to achieve this, the Scientific Committee began development of a ...
Meeting Document : WG-FSA-17/41 : Auteur(s): A. Dunn, D. Kerrigan and A. McNabb