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Modelling availability bias using existing time series count data: Adélie penguins as a case study
in the availability fraction is much higher prior to late November and after early January than ... sites in Antarctica during the breeding season are influenced by the date at which they are undertaken ... . A count of some attribute of the population on any date may therefore need to be adjusted by some ... date-specific factor (termed the availability fraction) if the count is to form the basis of an ...
Meeting Document : WG-EMM-04/54 : Автор(ы): L. Emmerson, B. Raymond and C. Southwell (Australia)
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Beach debris survey – Main Bay, Bird Island, South Georgia, 2005/06
, nylon line was absent from Bird Island, an encouraging result after the peak of 546 pieces in 1995/96 ... Abstract: During the sixteenth year of standardised beach surveys of man-made debris at Bird ... Island, South Georgia, a total of 544 items were collected, the highest number of debris collected since ... 1995/96. Compared to the previous recording period, 170% more items were collected during winter and ...
Meeting Document : SC-CAMLR-XXVI/BG/16 : Автор(ы): Delegation of the United Kingdom
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Modelling catch and effort data using generalised linear models with random cruise effects: trawl fishery for mackerel icefish (Champsocephalus gunnari) in CAMLR Area 58.5.2
, after which time there was a sharp increase in 2001 with a steady decline thereafter. The sharp increase ... models (GLMMs) including data analytic methods for examining the appropriateness of model structure and ... parameter values was presented in WG-FSA-SAM 03-12 using Dissostichus eleginoides in Subarea 48.3 of the ... CAMLR area as an example dataset. The application of these procedures to trawl catches of ...
Meeting Document : WG-FSA-03/35 : Автор(ы): S.G. Candy (Australia)
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Age-at-length of Patagonian toothfish from South Georgia
readings were significantly biased relative to reference ages but the third reading, after the reader had ... Abstract: To provide an age-length key for use in modelling the age structure of the Patagonian ... toothfish stock around South Georgia, we used otoliths to estimate the age of a sample of 264 Patagonian ... toothfish (Dissostichus eleginoides) captured in the longline fishery. We used a thin section grinding ...
Meeting Document : WG-FSA-02/75 : Автор(ы): J. Ashford, M. Belchier, C. Jones and S. Bobko
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A study on calibration for commercial echosounder using bottom backscattering strength in Antarctic
Antarctic krill) over the total acoustic signals were 26.95% and 92.04%, respectively before and after the ... fishing vessel to use it in estimating biomass of Antarctic krill (Euphausia superba). The method of ... calibration was to analyze the difference between the bottom backscattering strength of the commercial ... echosounder (i.e. ES70) and the scientific echosounder (i.e. EK60) at some transects designated by CCAMLR ...
Meeting Document : SG-ASAM-17/P01 : Автор(ы): S.-G. Choi, H. Lee, K. Lee and J. Lee
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Distribution of mackerel icefish (Champsocephalus gunnari) (Channichthyidae) around South Georgia at various stages of its life cycle
South Georgia at various stages of its life cycle Abstract / Description: The distribution of mackerel ... into account the spatial–temporal variability of C. gunnari. Young fish of the first age group (<15 ... cm in length) were mainly found in the southern part of the study area, immature fish (15–25 cm) in ... the east and southwest, and adults (25–39 cm) in the north. The distribution of C. gunnari changes ... distribution was considered between the depth ranges of 100–150 and 151–200 m, and there- after at 50 m ... initially in the layer from 200 m depth to the bottom, and at the end of the season, in the 50–75 m bottom ... migrate to the Shag Rocks area most probably die after reaching two years of age. The abovementioned ... older than the fi rst year of maturity, also form concentrations on the shelf at the beginning of the ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 49–69 : Автор(ы): Frolkina, Zh.A
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Interactions between cetaceans and fisheries in Southern Ocean
Abstract: Soon after longlining on Patagonian toothfish (Dissostichus eleginoides) started in the ... Southern Ocean in the second half of the 1980’s, interactions of cetaceans with these fisheries became ... apparent. The two species primarily involved were orcas (killer whales) (Orcinus orca) and male sperm ... whales (Physeter macrocephalus). Both species took substantial number of fish from the line primarily ...
Meeting Document : WG-FSA-05/11 : Автор(ы): K.-H. Kock (Germany), M. Purves (South Africa) and G. Duhamel (France)
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Сотрудничество с другими организациями: Соглашения с международными организациями
the Conservation of Southern Bluefin Tuna (CCSBT) and South Pacific Regional Fisheries Management ... Organisation (SPRFMO)) expire after CCAMLR-XXXVII. Activity under these arrangements has generally been ... restricted to exchange of reports and invitation to meetings. The Secretariat proposes that this be extended ... tagging program, and to cooperation with the CCAMLR Catch Documentation Scheme for Dissostichus spp. (CDS ...
Meeting Document : CCAMLR-XXXVII/10 : Автор(ы): CCAMLR Secretariat
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Review of length-weight relationships for Antarctic krill
euphausiid species), are listed for ash-free dry weight, dry weight, and wet weight. The accuracy of length ... taken into account. The influence of seasonal changes on length-weight relationship parameters is ... over a short period during the spawning season (end of February to beginning of March 1985), when most ... eggs (Siege1, 1989). After the ovaries had recovered and during the winter resting stage there was no ... weight, dry weight, and wet weight. The accuracy of length-weight relationship calculations is improved ... when information on sex and dominant maturity stages is taken into account. The influence of seasonal ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 145–155 : Автор(ы): Siegel, V.
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WG-FSA-08/60
connected to a weight or a number of weights such as chains or grapnels at the beginning or end of the ... : Generally - large weight with prongs used to anchor each end of a line to the seabed. Small grapnels ... about 20kg) providing extra weight and stability to each end of a set line and to manage tension on the ... seabed end to prevent tangling of the downline and grapnel Sinking rope: Rope with a negative ...
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