Résultats de la recherche
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Brief analysis of tag-recapture data in Statistical Subarea 48.4
Patagonian toothfish (Dissostichus eleginoides) in Subarea 48.4. It describes the tagging procedure, the ... information gained about biology, growth and movement of Patagonian toothfish, and looks at the potential link ... between statistical subareas 48.3 and 48.4. The characterisation of tag recapture data from Subarea 48.4 ... shows that the tagging programme is successful in providing substantial information for the stock ...
Meeting Document : WG-FSA-14/50 : Auteur(s): M. Soeffker, C. Darby, M. Belchier and R. Scott (United Kingdom)
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Preliminary modelling of potential climate-change impacts on krill and a krill-dependent predator in CCAMLR Subareas 48.1 to 48.3
affect krill resources and the marine ecosystem in Antarctic waters is critical. Previous research has ... assessed the potential consequences of these impacts for both the krill stock and its dependent predators ... biomass of krill as well as the abundance of krill-dependent predators. These outcomes have implications ... modelling of potential climate-change impacts on krill and a krill-dependent predator in CCAMLR Subareas ...
Meeting Document : WG-EMM-16/53 : Auteur(s): E.S. Klein, S.L. Hill, G.M. Watters and J.T. Hinke
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Review of skate (Rajiformes) by-catch in CCAMLR toothfish fisheries
useful for a future focus topic in the SISO. Author(s): Secretariat Title: Review of skate (Rajiformes ... Abstract: Available data on the by-catch of Rajiformes was extracted from the CCAMLR database ... spatial ranges for some species. The data collected as part of CCAMLR fisheries represents a very ... substantial repository of information on Southern Ocean Rajiformes; realising the full potential of this data ...
Meeting Document : WG-FSA-14/12 : Auteur(s): Secretariat
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Preliminary examination of otolith microchemistry to determine stock structure in Antarctic toothfish (Dissostichus mawsoni) between SSRU 88.1C and 88.2H
concentrations in the otolith edge and then to (ii) assess the potential of natal signatures to distinguish ... shown. This resulted in the correct classification of 63% of fish overall to their original capture ... stocks among these regions. For the elements (Mg, Al and Sr) spatial variation in otolith chemistry was ... success (79%), compared to the otolith edge which suggested the majority of fish from SSRU 88.1C and 88.2H ...
Meeting Document : WG-SAM-14/33 : Auteur(s): R. Tana, B.J. Hicks, C. Pilditch and S.M. Hanchet (New Zealand)
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Annual report of research fishing operations at Division 58.4.4b in 2016/17 fishing season
Abstract: This paper represents the annual report of a multi-member longline survey on Patagonian ... toothfish (Dissostichus eleginoides) at Division 58.4.4b in 2016/17 fishing season by France and Japan. The ... , 2018 for September to November French cruise). In this paper, the data set during last fishing season ... (2016/17) was used for reporting the quantity of data, samples collected, and results of quick analysis ...
Meeting Document : WG-SAM-18/31 : Auteur(s): Delegations of Japan and France
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Annual report of research fishing operations at Subarea 48.6 in 2016/17 fishing season
Abstract: This paper represents the annual report of a multi-member longline survey on Antarctic ... Africa. The data set, C2 and Oｂserver data, was provided by the CCAMLR Secretariat on the 20th of April ... , 2018. In this paper, the data set during last fishing season (2016/17) was used for reporting the ... quantity of data, samples collected, and results of quick analysis as a progress toward research milestones ...
Meeting Document : WG-SAM-18/32 : Auteur(s): Delegations of Japan and South Africa
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CPUE values derived from Soviet fishery statistics as indicators of Antarctic krill density fluctuations in 1977–1991
Abstract: The average CPUE values, annual and calculated for the periods of 1977-1986 and 1986 ... fluctuations. Rather high stability of the values investigated is revealed. It is proposed that krill density ... of 170-200 g/m2 may be considered as an average characteristic value for the area 48. It was revealed ... - 1991 are considered. It is assumed that these values adequately describe trends in krill density ...
Meeting Document : WG-EMM-04/39 : Auteur(s): F.F. Litvinov, A.Z. Sundakov and G.N. Andrianov (Russia)
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Variations in echosounder calibration with temperature, and some possible implications for acoustic surveys of krill biomass
were taken of the differences in gain settings, then integrated 120 kHz echo signals would be under ... biomass by acoustic techniques is dependent on a number of factors of which one of the most fundamental is ... those applied in the Antarctic, even after adjustments have been made to account for differences in ... -reported by 2.8 dB, leading in turn to an under-estimation of krill biomass by 52.5%. Every effort should ... employed during surveys around South Georgia, and no account were taken of the differences in gain ... surveys are conducted. In addition, the implications for biomass estimation of temperature variation ... gain applied by system electronics in some echosounders (Simmonds, 1990), the possible effects of ... temperature, and suggested that many of the transducers then used in fishery acoustics would not be stable ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 273–281 : Auteur(s): Brierley, A.S., C. Goss, J.L. Watkins and P. Woodroffe
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TOPIC SUMMARY OF CEP DISCUSSIONS ON NON-NATIVE SPECIES (NNS) IN ANTARCTICA
continuing consideration of this important topic which receives the highest priority in the 5-yer CEP ... Abstract: This paper summarises past discussions by the Committee for Environmental Protection ... (CEP) about non-native species (NNS). The intention is to provide a central resource for the CEP’s ... workplan. Author(s): CEP Observer to CCAMLR Title: TOPIC SUMMARY OF CEP DISCUSSIONS ON NON-NATIVE SPECIES ...
Meeting Document : CCAMLR-XXVII/BG/19 Rev. 1 : Auteur(s): CEP Observer to CCAMLR
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Demographic effects of extreme weather events: snow storms, breeding success, and population growth rate in a long-lived Antarctic seabird
consequences of such events. In this study, we aimed to quantify the effects of snow storms on nest survival in ... season and nearly 30% of the interannual variation in colony productivity in period 1985–2014. Snow ... during a snow storm than chicks in good condition. This stresses the importance of con- sidering ... are poorly understood because they are, by definition, rare events. If the frequency and severity of ...
Meeting Document : WG-EMM-16/P13 : Auteur(s): S. Descamps, A. Tarroux, Ø. Varpe, N.G. Yoccoz, T. Tveraa and S.-H. Lorentsen