Search results
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Acoustic assessment of potential bias in abundance estimates of mackerel icefish from trawl surveys
trawl surveys are the most reliable and appropriate method to survey stocks of mackerel icefish ... that a significant proportion of the stock occurred in midwater. If this is the case, then bottom trawl ... surveys may underestimate the biomass of mackerel icefish. This paper addresses this question by comparing ... acoustic signal are discussed. The vertical distribution of mackerel icefish in relation to the diel light ...
Meeting Document : WAMI-01/05 : Author(s): E. van Wijk, T. Pauly, A. Constable and R. Williams (Australia)
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Possible causes of variation of Champsocephalus gunnari vertical and horizontal distribution
inaccessible for fishing. Conduction of census surveys during this period is pointless. In spring, during ... beginning of this period (September). Data on stock assessment collected during accounting survey are good ... enough, however, this season is far from suitable for accounting surveys because of severe ice conditions ... . It is not recommended to make stock assessment of fish yielded with bottom fishing gear, as in this ...
Meeting Document : WAMI-01/08 : Author(s): Zh.A. Frolkina and S.M. Kasatkina (Russia)
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An initial analysis of data provided from the deployment of scientific observers in the krill fishery
Abstract: An analysis of the observer data provided from the krill fishery was undertaken using a ... range of complementary methods of data quality control and variance investigation. A sample pooling ... approach analysis on the other hand revealed the distribution of variance in krill length at different ... variability in krill length due to seasons, months and areas and this allowed estimates of variance ...
Meeting Document : WG-EMM-12/60 : Author(s): S. Thanassekos (CCAMLR Secretariat), S. Candy (Australia), E. Appleyard (CCAMLR Secretariat), S. Kawaguchi (Australia) and K. Reid (CCAMLR Secretariat)
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Notes on the availability of three important finfish species in offshore waters of the lower South Shetland Islands (Subarea 48.1)
Abstract: In 1998, an offshore scientific trawl survey of bottom fish sampling within the 50-500 ... m isobath of the lower South Shetlands Islands (King George Island to Low Island) was conducted. In ... addition, the abundance of two commercially important Antarctic fish, Notothenia rossii and Gobionotothen ... can be increased. However, the value of these data as a combined singular data set for one year of ...
Meeting Document : WG-FSA-99/31 : Author(s): C.D. Jones (USA), E.R. Barrera-Oro, E.R. Marschoff and R.J. Casaux (Argentina)
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COMPARISON OF THE BIOMASS OF ANTARCTIC KRILL, (EUPHAUSIA SUPERBA), AROUND THE SOUTH SHETLAND AND SOUTH ORKNEY ISLANDS IN THREE YEARS: 1999, 2000 AND 2008
Abstract: Using a combination of techniques, we examine data from three cruises in 1999, 2000 and ... 2008 to calculate the biomass and demographic characteristics of Antarctic krill (Euphausia superba ... distributions of krill between Elephant Island and the South Orkney Islands were similar. The similarity in ... length frequency distributions suggest that acoustic data collected as part of US AMLR finfish surveys ...
Meeting Document : WG-EMM-08/26 : Author(s): C. Reiss and A. Cossio (USA)
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Report from the CCAMLR Observer (Argentina) to the Fourth Session of the United Nations Environment Assembly of the United Nations Environment Programme (Nairobi, Kenya, 11 to 15 March 2019)
Abstract: This document summarizes the debates and refers to the main documents of interest to ... of the United Nations Environment Assembly of the United Nations Environment Programme, in March 2019 ... . In this respect, the debates surrounding micro-plastics and the impact of land-based activities on ... from the CCAMLR Observer (Argentina) to the Fourth Session of the United Nations Environment Assembly ...
Meeting Document : CCAMLR-38/BG/27 : Author(s): CCAMLR Observer (Argentina)
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Population identity, site-fidelity, movement ranges and preliminary estimates of abundance of southern right whales in the Antarctic Indian sector inferred from genetic markers
Abstract: Baleen whales are important components of the Antarctic marine ecosystem as ‘sea-based ... identity as well the individual identity of southern right whales distributed in summer in the Antarctic ... south of 60°S). In total, 157 biopsy samples were collected as skin biopsies from free-ranging whales ... nucleotides of the mtDNA control region, genotyped at fourteen microsatellite loci, and the sex determined by ...
Meeting Document : WG-EMM-18/18 : Author(s): L.A Pastene, M. Goto, P. Acuña, M. Taguchi, T. Hakamada and K. Matsuoka
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The development of the role of the WG-EMM Subgroup on Methods
from one that considers methods for collecting data as part of CEMP to one that considers and develops ... are 4 key areas; 1.to maintain the process of validation and checking of the existing CEMP database, 2 ... . to evaluate appropriate methods for analysis of existing parameters, 3. to develop methods to combine ... management advice. Author(s): K. Reid (United Kingdom) Title: The development of the role of the WG-EMM ...
Meeting Document : WG-EMM-01/17 : Author(s): K. Reid (United Kingdom)
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A re-analysis of the Kerguelen Shelf and Skiff Bank stocks of Champsocephalus gunnari
Abstract: Catches of Champsocephalus gunnari from the Kerguelen Shelf and Skiff Bank stocks were ... -frequency data for the years 1981 to 1990. Cohort analysis yielded a Stock Biomass of 22 711 tonnes in 1988 ... for the Age 2 Kerguelen Shelf stock, an order of magnitude lower than that calculated from a biomass ... possible declining trend in the abundance of this stock. Author(s): G. Duhamel (France) and D.J. Agnew ...
Meeting Document : WG-FSA-90/17 : Author(s): G. Duhamel (France) and D.J. Agnew (Secretariat)
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Updated and revised stock assessments of Patagonian toothfish (Dissostichus eleginoides) in the vicinity of Kerguelen Islands (Division 58.5.1) and Crozet Islands (Subarea 58.6)
Abstract: An updated and revised assessment of the Patagonian toothfish (Dissostichus eleginoides ... results show stable estimates of biomass and SSB never fall below 60% of the initial biomass considering ... the actual level of catches (5100t in Kerguelen and 700t in Crozet). Author(s): S. Romain and G ... . Duhamel (France) Title: Updated and revised stock assessments of Patagonian toothfish (Dissostichus ...
Meeting Document : WG-FSA-14/36 Rev. 1 : Author(s): S. Romain and G. Duhamel (France)