Resultados de la búsqueda
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Changes in biomass of eight species of finfish around the South Orkney Islands (Subarea 48.2) from three bottom trawl surveys
Abstract: Stocks of finfish around the South Orkney Islands (Subarea 48.2) suffered substantial ... declines during the period the fishery was open from split year 1977/78 through 1989/90. Scientific bottom ... trawl surveys of finfish biomass within the 500 m isobath of the South Orkney Islands have been ... conducted by the Federal Republic of Germany in 1985, Spain in 1991, and the United States in 1999 ...
Meeting Document : WG-FSA-99/32 : Autor(es): C.D. Jones (USA), K.-H. Kock (Germany) and E. Balguerías (Spain)
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Criteria for aging the otoliths of Dissostichus eleginoides from South Georgia (Subarea 48.3) and an analysis of aging precision
criteria to test. Two sets of criteria ate presented for aging the otoliths of Dissostichus eleginoides ... , one (C1) developed from previous work on the same species; the other (C2) adapted from generalized ... criteria used to age high latitude fish from the north-west Pacific Ocean. Growth structures were found to ... within and between observers, reflecting the complexity of the otolith structure. Aging using criteria C1 ...
Meeting Document : WG-FSA-98/52 : Autor(es): J. Ashford (United Kingdom) and S. Wischniowski (Canada)
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Fishing with pots in the Antarctic region (CCAMLR Statistical Subareas 48.1, 48.2 and 88.3)
Abstract: Results of the February-March 1998 exploratory and experimental fishing operations ... using pots are described. This research took place during the New Fisheries Project carried out by Chile ... , with the purpose of determining the presence of Dissostichus spp. in Subareas 48.1, 48.2 and 88.3. In ... the fishing gear, with a distance of approximately 90 m between them. The pots were lowered at a depth ...
Meeting Document : WG-FSA-98/20
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Data on reproduction biology of Dissostichus mawsoni from the Ross Sea (Statistical Subarea 88.1)
Abstract: Macroscopic data of the field research obtained during fishing trips on board Spanish ... individuals from various SSRU in the Ross Sea were calculated. For one specimen with maximum observed weight ... of gonads (15.5 kg, GSI – 23.85 %), the individual absolute fecundity (IAF) and relative fecundity ... of gonads on various grounds in the Ross Sea during the fishery season confirmed previous conclusions ...
Meeting Document : WG-FSA-11/04 : Autor(es): A.K. Zaytsev (Russia)
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Estimating density and biomass of Antarctic krill (Euphausia superba) around South Shetland using the 2-dB difference method
Abstract: The distribution and abundance of krill aggregation inhabiting the Subarea 48.1, which ... includes the Elephant Island peripheries and the west and south of the South Shetland Island, were ... collected by the commercial middle trawl fishing vessel. The data were processed and analyzed following ... identification) based on data from a transect-based survey. The weighted krill density and biomass were estimated ...
Meeting Document : SG-ASAM-18/08 : Autor(es): S. Choi, K. Lee and D. An
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The Evangelistas Islets, Chile: a new breeding site for black-browed albatrosses
melanophrys) is reported at the Evangelistas Islets, Straits of Magellan, Chile. The population was censused ... from aerial photographs taken on 13 October 2002 which yielded an estimate of the number of breeding ... Lobos Islets, two of the four islets in the Evangelistas group. This new record raises to four the ... (Australia), J. Valencia (Chile) and K. Lawton (Australia) Title: The Evangelistas Islets, Chile: a new ...
Meeting Document : WG-FSA-03/10 : Autor(es): J. Arata (Chile), G. Robertson (Australia), J. Valencia (Chile) and K. Lawton (Australia)
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Midwater trawl catchability regarding quantitative estimation of krill biomass using the method of trawling surveys on abundance
distributional pattern in the surveyed area enable to increase reliability of the biomass estimates. Comparative ... taken as an example, proved the latters not to be suitable for krill biomass estimation using method of ... trawling surveys on abundance. Small research trawls were found to have high catchability variations in the ... surveyed ground and the biomass estimates were characterized by high relative error. Standard methods of ...
Meeting Document : WG-KRILL-91/32 : Autor(es): S.M. Kasatkina (USSR)
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A history of the acquisition and analysis of sea-ice data by CCAMLR
the early years of development of the ecosystem monitoring program sea ice data, especially derived ... 1990, and following a pilot study carried out by the Secretariat sea ice data derived from US Joint Ice ... Centre ice charts were routinely acquired and analysed by the Secretariat from 1993. An alternative ... source of data, digital images produced by the US National Snow and Ice Data Centre, with a relatively ...
Meeting Document : WG-EMM-96/15 : Autor(es): Agnew, D.J.
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Analysis of fishing for Patagonian toothfish, Dissostichus eleginoides, conducted during the 28th fishery voyage by SRT Primorets
Abstract: An analysis of the Patagonian toothfish (Dissostichus eleginoides) fishery was carried ... out using data obtained during the 28th cruise of the SRTM Primorets to the Kerguelen Islands economic ... zone in the 1994-1995 season. Author(s): Chikov, V.N. Title: Analysis of fishing for Patagonian ... toothfish, Dissostichus eleginoides, conducted during the 28th fishery voyage by SRT Primorets Approval ...
Meeting Document : WG-FSA-95/18 : Autor(es): Chikov, V.N.
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Measurements of differences in the target strength of Antarctic krill (Euphausia superba) swarms at 38 and 120 kHz
Abstract: Differences in the target strength of adult Antarctic krill (Euphausia Superba) at 38 ... and 120 kHz have been inferred from differences in the mean back-scattering strength of swarms ... simultaneously insonified at these two frequencies in studies off the South Orkneys and Elephant Island in March ... in average target strength at these two frequencies. The results are in good agreement with recent ...
Meeting Document : WG-KRILL-90/28 : Autor(es): I. Hampton (South Africa)