Search results
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An interlaboratory comparison of ages estimated for Dissostichus eleginoides from the Argentine Sea, southwest Atlantic Ocean
Abstract: To examine consistency among laboratories in age estimation of Patagonian toothfish and ... 124 fishes caughts in Argentine Sea (South West Atlantic) Ages were estimated by readers from National ... a clearer section. More hyaline bands were visible in the NIWA preparations, particularly near the ... otoliths could not be classified as easy to read, the clarity of their zones is quite similar in the South ...
Meeting Document : WG-FSA-04/45 : Author(s): M.C. Cassia (Argentina), P.L. Horn (New Zealand) and J.R. Ashford (USA)
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Defining predator foraging ranges, illustrated using Adélie penguin foraging tracks from Mawson coast
taking into account interannual variation in foraging locations? This paper considers the issues to be ... addressed in answering that question. The proposed method for defining foraging ranges is based on an ... effort and this is used to delineate a feeding ground for Adélie penguins on the Mawson coast in eastern ... these foraging ranges for the purposes of small-scale management units may need to be examined in three ...
Meeting Document : WG-EMM-02/41 : Author(s): I.R. Ball, A.J. Constable, J. Clarke and L. Emmerson (Australia)
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Predation on fish by the southern elephant seal, Mirounga leonina, at King George Island, South Shetland Islands, as reflected by stomach lavage
, were stomach lavaged at King George Island in order to analyse their diet. The two major prey types ... were cephalopods and fish which ocurred respectively in 98,1% and 14% of stomachs containing prey ... nicholsi which constituted in number 69% of the otoliths found. This species was followed by the ... nototheniid Pleuragramma antarcticum which represented 11,7% in number and 31,3% in frequency of occurrence ...
Meeting Document : WG-EMM-01/58 : Author(s): G.A. Daneri and A.R. Carlini (Argentina)
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Developing a Ross Sea region medium-term data collection plan
Abstract: Data are collected for use in scientific research, the results of which are used to ... , prevention of changes or minimisation of the risk of changes in the marine ecosystem which are not ... of Antarctic marine living resources. Based on these goals and previous experience in the fishery ... , proposed medium term research objectives for the Ross Sea fishery for the next 5–7 years were developed in ...
Meeting Document : WG-FSA-10/32 : Author(s): S. Mormede and S. Hanchet (New Zealand)
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Informing and seeking advice from WG-SAM-18 about the revisions of the WSMPA proposal
in the Weddell Sea (WSMPA) to CCAMLR 2016, Germany has carried out further work on the WSMPA proposal ... ; Adjustment of the habitat of adult Antarctic toothfish in statistical areas 48.6 and 48.5 as a result of ... reference areas in statistical subarea 48.6 for monitoring the effects of harvesting on Antarctic marine ... the fisheries research zone (FRZ) foreseen in the draft WSMPA Conservation Measure and the ...
Meeting Document : WG-SAM-18/16 : Author(s): S. Hain, K. Teschke, H. Pehlke and T. Brey
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Informing and seeking advice from WS-SM 2018 about the revisions of the WSMPA proposal
in the Weddell Sea (WSMPA) to CCAMLR 2016, Germany has carried out further work on the WSMPA proposal ... Antarctic Peninsula; Adjustment of the habitat of adult Antarctic toothfish in statistical areas 48.6 and ... ; Establishment of scientific reference areas in statistical subarea 48.6 for monitoring the effects of harvesting ... ) foreseen in the draft WSMPA Conservation Measure and the establishment (number, location and size) of ...
Meeting Document : WS-SM-18/08 : Author(s): S. Hain, K. Teschke, H. Pehlke and T. Brey
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A von Bertalanffy growth model for Division 58.5.2 fitted to length-at-age data and a comparison of predicted with observed growth from mark–recapture data
trawl in Heard Island fishery were fitted using a von Bertalanffy (VB) growth model taking into account ... being a sharp decline in selectivity from 100% at 1000 mm down to 1% by 1600 mm. The VB curve fitted to ... relative to those for the LF sample were also included in defining relative probabilities, the VP maximum ... growth rate (AGR) for lengths measured at release and first recapture in mark-recapture studies were ...
Meeting Document : WG-FSA-SAM-06/07 : Author(s): S.G. Candy, A.J. Constable, T. Lamb and R. Williams (Australia)
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A BALANCED MODEL OF THE FOOD WEB OF THE ROSS SEA, ANTARCTICA
consistency. The model has 38 trophic groups and is balanced in terms of annual flows of organic carbon in an ... average, recent year (1990–2000). The focus of the model is on the role of Antarctic toothfish in the food ... ) in trophic flows between groups. Parameters for biomass, production rate, growth efficiency, diet ... changes in biomass, production/biomass, and production/consumption parameters were needed to balance the ...
Meeting Document : WG-EMM-09/42 : Author(s): M.H. Pinkerton, J.M. Bradford-Grieve and S.M. Hanchet (New Zealand)
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Exploratory analysis of acoustic data from the Ross Sea
conducting acoustic surveys for toothfish and rattails in the Ross Sea. Acoustic data were collected using a ... . All line recordings were in water over 1000 m deep. Because of the spreading of the acoustic beam, the ... . Two types of pelagic layers were present in most acoustic recordings: a dense shallow layer between 30 ... present in some recordings and these tended to occur at 150–400 m depth, between the layer marks. The most ...
Meeting Document : WG-FSA-SAM 03/9 : Author(s): R.L. O’Driscoll and G.J. Macaulay (New Zealand)
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UPDATE OF THE INTEGRATED STOCK ASSESSMENT FOR THE PATAGONIAN TOOTHFISH (DISSOSTICHUS ELEGINOIDES) FOR THE HEARD AND MCDONALD ISLANDS USING CATCH-AT-AGE DATA AND TWO YEARS OF SURVEY ABUNDANCE-AT-AGE DATA
took into account uncertainty due to haul-level variability in catch-at-length proportions, ALK ... predictions of numbers-at-age and proportions-at-age. In other work, this matrix was found to depend on the ... median score for all aged fish in the assessment was 3 but some fishery-by-year combinations had a higher ... value of 4. The output from the integrated assessment of most interest in this study is the CV of the ...
Meeting Document : WG-SAM-09/09 : Author(s): S.G. Candy (Australia)