Resultados de la búsqueda
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Estimating the impact of depredation by killer whales and sperm whales on longline fishing for toothfish (Dissostichus eleginoides) around South Georgia
the levels of depredation caused by killer whales (Orcinus orca) and sperm whales (Physeter ... line of a large number of toothfish, usually depressing CPUE by about 50%. Sperm whales occur in ... , depressing CPUE by up to 20%. Sperm whales have been more frequently encountered in recent years, occurring ... throughout the season that is not related to the pattern of fishing effort. By comparing catch rates with and ...
Meeting Document : WG-FSA-10/P06 : Autor(es): J. Moir Clark and D.J. Agnew
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Analysis of variability of krill size and fish by-catch in Japanese krill fishery based on scientific observer data
sample size by using variance component analysis. Observer datasets on Japanese krill fishery from 1995 ... –2008 were analysed by using a hierarchical Bayesian model. The models were composed of multistage ... length and bycatch fish number, the parameters estimated by MCMC hardly show difference among years, sub ... datasets were calculated by the multistage sampling formula with the variance terms derived from the ...
Meeting Document : WG-EMM-12/68 : Autor(es): T. Okuda and M. Kiyota (Japan)
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An initial analysis of the characteristics of Antarctic krill taken by the commercial fishery and Antarctic fur seals during the winters of 2002 and 2003 at South Georgia
seals. There were significant differences in the mean size of krill taken by vessels/measured by ... during winter. It may be appropriate to review the number of krill measured by observers in order to ... ensure that other sufficient time can be allocated to other activities, especially the assessment of by ... analysis of the characteristics of Antarctic krill taken by the commercial fishery and Antarctic fur seals ...
Meeting Document : WG-EMM-04/62 : Autor(es): K. Reid, D.J. Agnew, N.L. Warren and E. Owen (United Kingdom)
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An investigation of avoidance by Antarctic krill of RRS James Clark Ross using the Autosub-2 autonomous underwater vehicle
of the research vessel by Antarctic krill Euphausia superba. The AUV was equipped with the same type ... between the amount of krill detected by the ship or the AUV, either at the transect level or at finer ... scales within transects. We conclude, therefore, that avoidance by krill of RRS James Clark Ross will not ... significantly bias krill abundance estimates by this vessel. Author(s): A.S. Brierley, P.G. Fernandes, M.A ...
Meeting Document : WG-EMM-01/14 : Autor(es): A.S. Brierley, P.G. Fernandes, M.A. Brandon, E. Armstrong, D.G. Bone and the Autosub Team (United Kingdom)
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AND DOMESTIC SUBANTARCTIC FISHERIES BY THE AUSTRALIAN ANTARCTIC DIVISION AND THE AUSTRALIAN FISHERIES MANAGEMENT AUTHORITY
Abstract: Australia’s sub-Antarctic and Antarctic fisheries observer program is administered by ... targeting finfish in the CCAMLR area. As the assessments and conservation measures employed by CCAMLR ... increase in sophistication, the tasks required to be completed by observers are increasing in number and ... quality data continues to be collected by SISO. Author(s): O’Regan, K., Welsford, D., Robertson, T., Lamb ...
Meeting Document : TASO-08/05 : Autor(es): O’Regan, K., Welsford, D., Robertson, T., Lamb, T.
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Finfish research proposals for Subarea 48.6 by Koryo Maru 11 for 2012/13 (this is a revision of WG-SAM-12/12)
Abstract: This paper presents a revised plan for research fishing by the Koryo Maru 11 for the ... conducted by OLRAC-SPS (2012) – tabled at WG-FSA-12 as a separate paper. The research plan presented here ... draws on the results presented by OLRAC-SPS (2012) and addresses knowledge gaps highlighted by that ... Subarea 48.6 by Koryo Maru 11 for 2012/13 (this is a revision of WG-SAM-12/12) Approval: Approved ...
Meeting Document : WG-FSA-12/30 : Autor(es): C. Heiniken and R. Ball (South Africa)
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By-catch in the longline fishery along the shelf slope of Kerguelen (Division 58.5.1) during the 1994/95 and 1995/96 cruises
Abstract: By-catch was observed during two successive cruises of longliners fishing for ... of Kerguelen. By-catch consisted mainly of Rajidae Bathyraja spp. (85 %). The proportion of species ... taken in the by-catch was low (less than 0.75%) and does not represent a problem at the present level of ... the patagonian toothfish fishery. Author(s): Capdeville, D., Duhamel, G. Title: By-catch in the ...
Meeting Document : WG-FSA-96/11 : Autor(es): Capdeville, D., Duhamel, G.
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Habituation to an acoustic harassment device (AHD) by killer whales depredating demersal longlines
fisheries that suffer significant losses caused by odontocete depredation. However, the efficacy of AHDs to ... was subjected to heavy depredation by killer whales. This species usually depredates longlines within ... expected this distance to increase in response to the acoustic disturbance created by the AHD. The ... resource made available by longliners. In addition to raising significant conservation concerns, this rapid ...
Meeting Document : WG-FSA-14/P04 : Autor(es): P. Tixier, N. Gasco, G. Duhamel and C. Guinet
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Joint research proposal for Dissostichus spp. in Subarea 88.3 by the Republic of Korea and New Zealand
survey by Chile in 1999. Since then there have been research surveys by New Zealand (2005), Russia (2011 ... (Parker et al. 2014). A 3-year research plan for this subarea was commenced by Korea in 2016 and new ... proposals to carry out research fishing in this subarea were submitted to WG-SAM-17 by New Zealand and ... Korea’s previous research by continuing to focus on those research blocks where tagged fish have ...
Meeting Document : WG-FSA-17/40 : Autor(es): Delegations of the Republic of Korea and New Zealand
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Comparison of age readings by two otolith preparation techniques and readers
estimated by different readers and using different methods. Both “break and burn” and “bake and embed ... ” techniques were used to prepare otoliths and each were read by an experienced reader from each program. The ... in interpretation of otolith banding patterns. Results suggest broad agreement in ages determined by ... comparisons before merging data. Bake and embed preparations were consistently interpreted by both readers ...
Meeting Document : WG-FSA-14/53 : Autor(es): S.J. Parker (New Zealand), A.F. Petrov (Russia), C.P. Sutton (New Zealand) and E.N. Kuznetsova (Russia)