Search results
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First Annual Report of the CCAMLR Otolith Network, 2002
Abstract: This report presents results from the first exchange of otoliths under the auspices of ... , from 23 to 27 July 2001. The National Institute of Water and Atmospheric Research, Nelson, New Zealand ... ; Central Ageing Facility, Victoria Australia; and CQFE, each provided a sample of otoliths, processing and ... reading one randomly chosen otolith from each pair. Half of the remaining otoliths were sent to each of ...
Meeting Document : WG-FSA-02/51
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THE DIET OF THE ANTARCTIC TOOTHFISH IN THE ROSS SEA
Abstract: This brief review documents the species composition of prey consumed by the Antarctic ... by both frequency of occurrence and dry weight. P. antarcticum is 71% by occurrence and 89% by weight ... deep oceanic waters (60-70°S) north of the shelf break the diversity of pelagic and epipelagic fishes ... is low. Here the diet of D. mawsoni consists of relatively small squid of at least six different ...
Meeting Document : WG-EMM-09/16 : Author(s): J.T. Eastman and A.L. DeVries (USA)
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Using stationary acoustic platforms to assess precision and accuracy of acoustical krill surveys
issues of krill migrating too close to the surface to be acoustically detected, as well as potential ... issues of diel changes in acoustic scattering strengths. However, due to logistic constraints, acoustic ... effects of krill vertical distribution on survey results. The Institute of Marine Research, Norway has on ... the South Orkney Islands since 2014, and in this report some of these data have been analysed in order ...
Meeting Document : WG-EMM-2019/32 : Author(s): T. Klevjer, G. Skaret and B.A. Krafft
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Modelling growth of Antarctic krill: a new approach to describing the growth trajectory
from population-level data consisting of modal lengths obtained from a time sequence of length ... frequency samples. We develop an alternative approach to predicting the trajectory of length over time using ... a step-growth function that combines models of instantaneous growth rate (IGR) at moult calibrated ... from direct measurements of individual pre- and post-moult krill sampled from the wild with a model of ...
Meeting Document : WG-EMM-05/27 : Author(s): S. Candy and S. Kawaguchi (Australia)
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On commercial significance of krill aggregations
of acoustic investigation obtained in the Soviet trawler operation areas in Subareas 48.1-48.4 were ... numbering 22000 hauls for the period of 1986-1990 and those from Ukrainian trawlers for the period of 2001 ... and 2002 (2380 hauls). In the course of the recent twenty years, krill has been fished in the areas ... with biomass density of at least 100 g/m2. This threshold value of krill commercial biomass ...
Meeting Document : WG-EMM-03/31 : Author(s): S.M. Kasatkina (Russia)
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Interannual variability of polynya extent in the Antarctic Ocean
Abstract: There are two general kinds of polynya (an ice-free area within sea ice borders ... processes by exposing the surface of ocean to the atmosphere. Additionally, we think that the coastal ... reports on the place, time and shape of the coastal polynyas. Accordingly, we pursued the transition of ... the coastal polynyas using satellite image data of sea ice concentrations by the NSIDC (National Snow ...
Meeting Document : WG-EMM-01/34 : Author(s): M. Naganobu and K. Segawa (Japan)
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Trawl survey of the Patagonian toothfish (Dissostichus eleginoides) resource off the Prince Edward Islands
Abstract: A bottom trawl survey was conducted in the northern half of the South African EEZ ... around the Prince Edward Islands in April 2001. Due to the paucity of bathymetric data, it was not ... study to ascertain the feasibility of conducting future trawl surveys, and to collect relevant data to ... aid in the design of such surveys should they be deemed practical. The maximum operating depth for the ...
Meeting Document : WG-FSA-01/72 : Author(s): R.W. Leslie and B.P. Watkins (South Africa)
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Fishing for toothfish using pots: results of trials undertaken around South Georgia, March–May 2000
Abstract: During the period March to May 2000, the UK undertook trials of a pot fishing method to ... trial, the results, and discusses the commercial viability of this fishing method for toothfish ... of crab species. The catch rate of toothfish was notably lower than that achieved in the longline ... fishery. Importantly, the use of pots eliminated bird bycatch. To capitalise on this feature, there is a ...
Meeting Document : WG-FSA-00/23 : Author(s): D. Agnew, T. Daw, M. Purves and G. Pilling (United Kingdom)
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Catchability of midwater trawls in relation to krill fishery
estimation of total krill lengths distribution, obtained on the basis of trawl samples from different catched ... total distribution of krill length, obtained using weighting of trawl samples (usually 200 ind.) against ... the catch, may considerably differ (statistically significantly) from that calculated on the basis of ... trawling. The example of trawl samples processing for the study area off Elephant Island is presented ...
Meeting Document : WG-EMM-98/20 : Author(s): S.M. Kasatkina (Russia)
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Trends in relative abundance of fjord Notothenia rossii, Gobionotothen gibberifrons and Notothenia coriiceps in trammel net catches at Potter Cove, South Shetland Islands
Abstract: A monitoring program of demersal fish in inshore sites of the South Shetland Islands ... has continued in Potter Cove from 1991 to 1998, covering a continuous sampling period of 15 years and ... in Harmony Cove, Nelson Island, in the austral summer 1995/96. The decline in trammel net catches of ... fjord fishes of the species Notothenia rossii and Gobionotothen gibberifrons in relation to the non ...
Meeting Document : WG-FSA-98/57 : Author(s): E. Barrera-Oro, E.R. Marschoff and R.J. Casaux (Argentina)