Search results
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Notothenia (p.) gibberifrons Stock Status and TAC Estimation in the Area of Shag Rocks (Subarea 48.3)
Abstract: Data on age composition of catches and fishing efforts for 1979/80- 1987/88 were used ... to analyse N. guntheri stock status. On the basis of these data using VPA method with different ... (Atlantic Fisheries Research Institute data). To estimate terminal value of instantaneous fishing ... coefficient (F) different adjustments were used. Long-term mean of F, Gamma method, Pope and Shepherd method ...
Meeting Document : WG-FSA-88/33 : Author(s): R. Borodin and K. Shust (USSR)
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The role of fish in the Antarctic marine food web: differences between inshore and offshore waters in the southern Scotia Arc and west Antarctic Peninsula
Abstract: The role of fish in the Antarctic food web in inshore and offshore waters is analysed ... taking as an example the coastal marine communities of the southern Scotia Arc (South Orkney Islands and ... South Shetland Islands) and the west Antarctic Peninsula. Inshore, the ecological role of demersal fish ... is more important than that of krill. There, demersal fish are major consumers of benthos and also ...
Meeting Document : WG-FSA-02/6 : Author(s): E. Barrera-Oro (Argentina)
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Preliminary standardised CPUE analysis of the New Zealand toothfish fishery in Subarea 88.1 from 1997/98 to 2001/02
Abstract: This report provides the first analysis of standardised catch per unit of effort (CPUE ... ), and included a number of areas that had been fished for only one season. The second (main-ground ... main area of the fishery which had been consistently fished over most seasons. For the all-ground ... analysis, variables area, season, length of line, soaktime, latitude and month in season entered the model ...
Meeting Document : WG-FSA-02/41 : Author(s): R.G. Blackwell and S.M. Hanchet (New Zealand)
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Modelling the impact of fishery by-catches on albatross populations
developed a deterministic, density-dependent, age-structured model for assessing the effects of longlining ... tuna longline fisheries south of 30 S, to model estimated by-catch levels and other population ... parameters in the model. 3. The model used two alternative assumptions about patterns of at-sea distribution ... of wandering albatross (uniform between 30°S–60°S; proportional to the distribution of longline ...
Meeting Document : WG-FSA-01/18 : Author(s): G. Tuck, T. Polacheck (Australia), J.P. Croxall (UK) and H. Weimerskirch (France)
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THE RISK TO FISHERY PERFORMANCE ASSOCIATED WITH SPATIALLY RESOLVED MANAGEMENT OF ANTARCTIC KRILL (EUPHAUSIA SUPERBA) HARVESTING
will affect fishery performance. One metric of potential performance is the probability of encountering ... exploitable densities of the target species at the scale of fishing operations. The probability of ... encountering exploitable densities of Antarctic krill, Euphausia superba, at the 1 nm scale during an acoustic ... spatial scale of management units could usefully predict effects at the scale of fishing operations ...
Meeting Document : WG-EMM-09/P10 : Author(s): S. Hill, P. Trathan and D. Agnew
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PROPOSAL FOR AN EXTENSION TO THE MARK–RECAPTURE EXPERIMENT TO ESTIMATE TOOTHFISH POPULATION SIZE IN THE SOUTH OF SUBAREA 48.4
Abstract: 1. A three-year tagging study in the South of Subarea 48.4 was initiated in the 2008/09 ... fishing season with the aims of providing the data required for assessments of the population structure ... , size, movement and growth of both Dissostichus eleginoides and Dissostichus mawsoni in the South of ... 48.4; 2. In 2008/09 a total of 214 D. eleginoides and 192 D. mawsoni were tagged and released. Two ...
Meeting Document : WG-FSA-09/18 : Author(s): J. Roberts and D.J. Agnew (United Kingdom)
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Is toothfish catch correlated with the catch of vulnerable benthic invertebrate taxa?
Abstract: Accurate estimation of the true impact of bottom fishing on vulnerable marine ... ecosystems (VMEs) requires knowledge of the distribution of those communities relative to the fishing ... study used the catch of the six most common vulnerable invertebrate taxa reported by observers on New ... benthic invertebrate catch rates at a longline segment level. Analysis of the data available showed no ...
Meeting Document : WG-EMM-10/27 : Author(s): S.J. Parker and M.H. Smith (New Zealand)
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Modern data on parasitofauna of Dissostichus mawsoni and by-catch species from logline fishing in Antarctica
Abstract: Parasites are one of an integral part of any ecosystem and unfortunately knowledge ... of Antarctic circumpolar ecosystem plays its role on existence of endemic forms of animals, including ... parasites, which sometimes have unpredictably large sizes and distribution. The best example of it ... – Lophoura szidati. In this work we conclude the results of preliminary analysis of collected parasites of ...
Meeting Document : WG-FSA-12/P09 : Author(s): I.I. Gordeev and S.G. Sokolov
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Multiyear changes in distribution and abundance of Salpa thompsoni in the Western Antarctic Peninsula region
characterized by a circumpolar distribution and its appearance is clearly associated with the occurrence of the ... Antarctic Circumpolar Current (ACC). This area of the Southern Ocean is characterized by a relatively low ... productivity and high water temperature. In recent years the expansion of distribution range of this ... invertebrate species has been observed. This process may be a result of the ACC southward movement, which is ...
Meeting Document : WG-EMM-16/75 : Author(s): A. Panasiuk, A. Słomska, J. Wawrzynek, M. Konik and A. Weydmann
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Effects of variability in prey abundance on reproduction and foraging in chinstrap penguins (Pygoscelis antarctica)
Abstract: Life-history theory predicts that adults of long-lived species such as seabirds should ... offspring provisioning, the most energetically costly component of seabird parental care, adults need to ... contend with large interannual fluctuations in prey availability and hence the cost of chick provisioning ... foraging effort. Using ship-based hydroacoustic assessment of prey, time-depth recorders attached to ...
Meeting Document : WG-EMM-06/P6 : Author(s): D.A. Croll, D.A. Demer, R.P. Hewitt, J.K. Jansen, M.E. Goebel and B.R. Tershy (USA)