Search results
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Population demography of Antarctic fur seals: the costs of reproduction and implications for life-histories
Abstract: 1. This study examined the costs of reproduction in terms of future survival and ... reproduction in female Antarctic fur seals from Bird Island, South Georgia. It used mark-recapture data from 11 ... . 2. Population age structures were used, in conjuction with the measured age-specific survival rates ... result of pregnancy which accounted for 40–50% of adult female mortality. This effect was greatest in the ...
Meeting Document : WG-EMM-95/26 : Author(s): Reid, K., Croxall, J.P., Lunn, N.J., Boyd, I.L.
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Fisheries risks to the population viability of black petrel (Procellaria parkinsoni)
1.2% and 3.1% per year. Mark-recapture data were useful in estimating demographic parameters, like ... spend an average of 1.2 y in the colony as pre-breeders, with only 3% skipping the pre-breeder phase. Of ... birds that appear in the study area as pre-breeders and survive to breed, only 68% do so in the study ... well determined because we can’t distinguish mortality from emigration (birds that breed in an area ...
Meeting Document : WG-SAM-10/P01 : Author(s): R.I.C.C. Francis and E.A. Bell (New Zealand)
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ECOSYSTEM SERVICES OF THE SOUTHERN OCEAN
resources, and the regulation of global climate and sea level. Assessing ecological processes in terms of ... the Southern Ocean ecosystem is generally under-represented in assessments of ecosystem services at ... making processes within the ATS are in many ways pre-adapted to deliver evidence-based policy which takes ... gathering work which has been conducted to support decision making in the Antarctic context could relatively ...
Meeting Document : WG-EMM-11/21 : Author(s): S.M. Grant, S.L. Hill and P.N. Trathan (UK)
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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
aspects of a tagging program, in particular the effects of the numbers of fish tagged, the duration of a ... tagging program, the size of tagged fish, and the type of auxiliary data used in the assessment. The ... numbers were important particularly in the early stages of an exploratory fishery to ensure some ... estimates, however the precision of SSB status estimates in the final assessment year was relatively low ...
Meeting Document : WG-SAM-12/24 : Author(s): P.E. Ziegler (Australia)
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Fishery Reports 2015
of Area 51) (159.34 KB) Fishery Report 2015: Exploratory fishery for Dissostichus spp. in Subarea ... 88.1 (767.74 KB) Fishery Report 2015: Exploratory fishery for Dissostichus spp. in Subarea 88.2 (373.09 ... Report 2015: Exploratory fishery for Dissostichus spp. in Subarea 48.6 (368.21 KB) Fishery Report 2015 ... : Exploratory fishery for Dissostichus spp. in Division 58.4.1 (324.01 KB) Fishery Report 2015: Exploratory ...
Page : Site Section: Publications
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Fishery Reports 2017
Area 51) (156.93 KB) Fishery Report 2017: Exploratory fishery for Dissostichus mawsoni in Subarea 88.1 ... (1.62 MB) Fishery Report 2017: Exploratory fishery for Dissostichus mawsoni in Subarea 88.2 (995.33 KB ... KB) Fishery Report 2017: Exploratory fishery for Dissostichus mawsoni in Subarea 48.6 (345.19 KB ... ) Fishery Report 2017: Exploratory fishery for Dissostichus mawsoni in Division 58.4.1 (276.11 KB) Fishery ...
Page : Site Section: Publications
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Fishery Reports 2007
These Fishery Reports should be read in conjunction with the WG-FSA-07 Report (1.62 MB). APPENDIX ... D Fishery Report: Exploratory fishery for Dissostichus spp. in Subarea 48.6 (208.51 KB) APPENDIX E ... Fishery Report: Exploratory fishery for Dissostichus spp. in Division 58.4.1 (154.19 KB) APPENDIX F ... Fishery Report: Exploratory fishery for Dissostichus spp. in Division 58.4.2 (72.49 KB) APPENDIX G Fishery ...
Page : Site Section: Publications
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Fishery Reports 2008
These Fishery Reports should be read in conjunction with the WG-FSA-08 Report (1.18 MB). APPENDIX ... D Fishery Report: Exploratory fishery for Dissostichus spp. in Division 58.4.1 (198.62 KB) APPENDIX ... E Fishery Report: Exploratory fishery for Dissostichus spp. in Division 58.4.2 (107.91 KB) APPENDIX ... F Fishery Report: Exploratory fishery for Dissostichus spp. in Division 58.4.3a (81.19 KB) APPENDIX ...
Page : Site Section: Publications
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Evaluating the impact of multi-year research catch limits on overfished toothfish populations
Abstract: In stocks that have been depleted by overfishing, the benefits of additional fisheries ... decades to recover even in the absence of fishing, and apparently low levels of research catches can ... significantly delay the recovery of a stock. Research catches in excess of 0.6% of B0 should be avoided to ... ensure that research doesn’t significantly impact on the recovery of depleted stocks in the long term ...
Meeting Document : WG-FSA-10/42 Rev. 1 : Author(s): D.C. Welsford (Australia)
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Some aspects of size composition dynamics of Antarctic toothfish (Dissostichus mawsoni) from the Ross Sea (Statistical Subarea 88.1)
mawsoni) from catches in different statistical areas of the Ross Sea was given. Biological data for two ... fishery periods were selected for comparison: 2003-2005 and 2008-2012. It allowed estimating changes in ... both periods of the fishery, in the southern statistical areas (SSRU H, I, K, L), the portion of small ... -sized immature fish had increased though the average size of fish in catches had not changed ...
Meeting Document : WG-FSA-12/17 : Author(s): A.K. Zaytsev (Ukraine)