Search results
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LENGTH-BASED ASSESSMENT FOR MACKEREL ICEFISH (CHAMPSOCEPHALUS GUNNARI) IN SUB-AREA 48.3
accurate identification of age cohorts from the survey data. In this paper we describe a length‐based ... the survey data which, in conjunction with the bootstrapped survey biomass data, yields an estimate of ... ) in sub‐area 48.3 employs the CMIX and GYM packages, which derives population numbers‐at‐age and ... approach that removes the problem of cohort determination. A stratified bootstrap technique (consistent ...
Meeting Document : WG-FSA-09/27 : Author(s): R.M. Hillary (Australia), C.T.T. Edwards, R.E. Mitchel and D.J. Agnew (United Kingdom)
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A representative system of CCAMLR MPAs: taking stock and moving forward
Abstract: The adoption of the Ross Sea MPA in 2016 marked "the end of the beginning" of ... establishing a representative system of MPAs in the Convention Area. This paper provides an overview of the ... progress made by CCAMLR toward establishing a representative system of MPAs in the Southern Ocean ... realises the potential of MPAs to enhance science and governance in Antarctica, including with respect to ...
Meeting Document : CCAMLR-XXXVI/BG/25 Rev. 2 : Author(s): Submitted by ASOC
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Coastal weather drives foraging behaviour of chinstrap penguins, Pygoscelis antarctica
supports them. In the southwest Atlantic sector of the Southern Ocean, Antarctic krill (Euphausia superba ... coastal downwelling and changes in the at-sea habitat usage of chinstrap penguins (Pygoscelis antarctica ... indicators because their performance is presumed to be linked to the overall function of the ecosystem that ... the ecosystem in an adaptive framework for sustainably managing krill catch levels, performance ...
Meeting Document : WG-EMM-18/P14 : Author(s): A.D. Lowther, P. Trathan, A. Tarroux, C. Lydersen and K.M. Kovacs
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WG-EMM-98
Monitoring changes in coastal fish populations by the analysis of pellets of the Antarctic shag Phalacrocorax ... principal results of YugNIRO complex studies in the Indian sector of the Antarctic V.I. Bondarenko, V.A ... Preliminary results of biological studies in the 1st Ukrainian Antarctic expedition in Subarea 48.2 in March ... in fishing areas of the World Ocean (the southwestern Atlantic and the southeastern Pacific) G.P ...
Meeting
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A review of methodologies aimed at avoiding and/or mitigating incidental catch of protected seabirds.
published reviews in the field of bycatch mitigation have typically had a species or fishing method focus ... management of offal and discards are recommended as the most effect measure to reducing seabird bycatch in ... fisheries interactions have been released in a variety of local, national and international media. Recent ... . This report presents the results of the seabird component of a global review of mitigation methods ...
Meeting Document : WG-FSA-05/P8 : Author(s): Bull, L.
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e-sc-xiii-a5-appD.pdf
... , mean krill density (g m-2) in each box was calculated using a simple mean of all acoustic density data ... . Terms of reference for the workshop were given in SC-CAMLR-XII, paragraph 2.29. Further specification ... of the data and analyses required were given in SC-CAMLR-XII, Annex 4, Appendix D. 3. The Agenda ... samples from Subarea 48.2 and two years sampling by Japan and Germany in the vicinity of the Subarea ... 48.1/48.2 boundary (1988 and 1992). All data were provided in the standard format of latitude
application/pdf attached to:WS-FLUX-94
Meeting Report : WS-FLUX-94
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DEVELOPMENT OF A METHODOLOGY FOR DATA QUALITY ASSESSMENT
these data can best be used.The quality of tag data is hard to assess. A methodology is developed to use data ... that is fitted in an assessment model.The data quality measures illustrate sometimes substantial variation ... a trip should be used in an assessment, and can also guide how these data can best be used.The quality ... model.The data quality measures illustrate sometimes substantial variation in the quality of particular data ...
Meeting Document : WG-SAM-08/13 : Author(s): D.A.J. Middleton and A. Dunn (New Zealand)
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Dietary segregation of krill-eating South Georgia seabirds
ranges. selectivity by predators, or differences in escape responses of krill. For the krill-eating ... Abstract: The diets of six of the main seabird species (two petrels, two albatrosses, two ... period in 1986. For five species, Antarctic krill Euphausia superba was the main food (39-98% by mass ... . The size of the krill taken was similar between seabird species, although there were small but ...
Meeting Document : WG-EMM-97/15 : Author(s): Prince, P.A., Croxall, J.P., Reid, K.
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A von Bertalanffy growth model for toothfish at Heard Island fitted to length-at-age data and compared to observed growth from mark–recapture studies
), predicted substantially lower mean length-at-age for older ages compared to the VB curve fitted using VP ... using the MLPLB-estimated VB parameters were closer to, but still substantially higher than, the mean ... more realistic predictions of mean length-at-age for young fish. File: 03candy-etal.pdf ... (IWLS), predicted substantially lower mean length-at-age for older ages compared to the VB curve fitted ... weighted least squares (IWLS), predicted substantially lower mean length-at-age for older ages compared ... to, but still substantially higher than, the mean trend in observed AGR values with release length compared ... ) to the VB model is also given in order to give more realistic predictions of mean length-at-age for young ... , as implemented in CASAL (Bull et al., 2005; Hillary et al., 2006), require estimates of mean length-at-age ...
Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 43–66 : Author(s): Candy, S.G., A.J. Constable, T. Lamb and R. Williams
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A simulation study of krill fishing by an individual Japanese trawler (SC-CAMLR-VI/BG/37)
candidate abundance indices (generally of a CPUE form) for krill biomass in the 600 n.mile square oceanic ... sector modelled are considered, and their performance in response to a variety of ways in which the ... . research vessel surveys) need to be considered to monitor changes in the number, distribution and size of ... Abstract: A model is set up for the operation (which includes both searching and fishing) of a ...
Meeting Document : WS-KCPUE-89/04 : Author(s): D.S. Butterworth (South Africa)