Resultados de la búsqueda
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Stock assessment of mackerel icefish (Champsocephalus gunnari) in the vicinity of Kerguelen Islands (Division 58.5.1) after the 2013 POKER Biomass survey
collect information of all the fish species including the mackerel icefish, Champsocephalus gunnari. Data ... from this random stratified trawl survey, added to the previous results of 2006 and 2010, was used for ... a short term assessment of C. gunnari on Kerguelen EEZ. The standard CCAMLR methods were used to ... provide potential yields, a catch limit of 840 t is recommended for 2014 and 580 t for 2015. Author(s ...
Meeting Document : WG-FSA-14/11 : Autor(es): R. Sinegre and G. Duhamel (France)
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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 : Autor(es): K. Reid (United Kingdom)
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Acoustic assessment of potential bias in abundance estimates of mackerel icefish from trawl surveys
surveys may underestimate the biomass of mackerel icefish. This paper addresses this question by comparing ... 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 ... acoustic signal are discussed. The vertical distribution of mackerel icefish in relation to the diel light ...
Meeting Document : WAMI-01/05 : Autor(es): 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 : Autor(es): Zh.A. Frolkina and S.M. Kasatkina (Russia)
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On assessment of instantaneous natural mortality rate of mackerel icefish (Champsocephalus gunnari) from South Georgia subarea
Abstract: The applicability of various methods to assess icefish natural mortality is analysed ... . On the basis of the conclusions made the parameters of Bertalanffy’s growth equation and natural ... mortality rate are estimated. Author(s): Zh.A. Frolkina, R.S. Dorovskikh (Russia) Title: On assessment of ... instantaneous natural mortality rate of mackerel icefish (Champsocephalus gunnari) from South Georgia subarea ...
Meeting Document : WAMI-010/7 : Autor(es): Zh.A. Frolkina, R.S. Dorovskikh (Russia)
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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 : Autor(es): 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 : Autor(es): C. Reiss and A. Cossio (USA)
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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 : Autor(es): G. Duhamel (France) and D.J. Agnew (Secretariat)
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Sexing fledglings and yearlings of magellanic penguins by discriminant analysis of morphometric measurements.
Abstract: Discriminant analysis was used to identify the sexes of fledglings and yearlings in the ... Magellanic Penguin (Spheniscus magellanicus). Eleven morphometric measurements were recorded in a sample of ... , followed by length of the middle toe and bill length. Yearling, besides being distinguishable by plumage ... tarsus length proved useful; 95.7% of cases were correctly classified (Chi square, p Author(s): J.A ...
Meeting Document : WG-CEMP-90/42 : Autor(es): J.A. Scolaro (Argentina)
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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 : Autor(es): S. Thanassekos (CCAMLR Secretariat), S. Candy (Australia), E. Appleyard (CCAMLR Secretariat), S. Kawaguchi (Australia) and K. Reid (CCAMLR Secretariat)