Search results
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Distribution and stock of krill Euphausia superba Dana in December 1983 and January 1984 before and during the Second International Biomass Experiment I/ SIBEX 1/
Abstract: The preliminary results of hydroacoustic investigations conducted aboard the Polish ... vessel "Profesor Siedlecki” /8.XII.1983- 8.I.1984/ are presented. In the first leg of the cruise /8 ... -20.XII.1983/ the area between Joinville I., South Orkney Is., Elephant I. was covered. The second leg ... , named the Second International BIOMASS Experiment, covered the area of the Drake Passage and Bransfield ...
Meeting Document : SC-CAMLR-III/BG/10 : Author(s): J. Kalinowski (Poland)
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The effect of temporal variability on power analysis predictions for Adélie penguin CEMP parameters at Béchervaise Island
Abstract: There are unresolved issues surrounding the use of power analyses for examining the ... ability of CEMP data to detect change. The effect size that should prompt a response if observed in a ... parameter and the likely response of parameters such as arrival or fledgling weights are two of these issues ... . Understanding the source of the variability required to generate ‘noise’ for the power analysis simulations is ...
Meeting Document : WG-EMM-03/49 : Author(s): L.M. Emmerson and C. Southwell (Australia)
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DEPREDATION AROUND SOUTH GEORGIA AND THE IMPLICATIONS ON STOCK ASSESSMENT OF D. ELEGINOIDES
Abstract: Observer data collected on longliners between 2003 and 2009 was analysed to look at the ... %) with killer whales present on 562 lines (3.8%) and sperm whales on 2588 lines (17.7%). By comparing the ... catch per unit efforts (CPUEs) with and without the presence if cetaceans, the amounts lost were also ... examined and varied from 0.9% to 5.8% of the TAC per year over the time period. Additional work was also ...
Meeting Document : WG-FSA-09/16 : Author(s): J. Moir Clark, D.A. Agnew, P. McCarthy and M. Unwin (United Kingdom)
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ASSESSMENT OF PATAGONIAN TOOTHFISH POPULATION IN THE NORTH OF SUBAREA 48.4 USING DATA FROM A FOUR-YEAR TAGGING EXPERIMENT
Abstract: 1. The bycatch TAC of 12 tonnes of macrourids was reached in 2008/09 triggering the ... early closure of the fishery with only 58.9 t of the 75 t TAC of D. eleginoides taken; 2. The target ... in 2008/09, slightly under the target of 375 for the full 75 tonnes of catch; 3. There were 29 D ... . eleginoides tag returns in 2008/09, bringing the total from all seasons up to 54 tag recaptures; 4. A total of ...
Meeting Document : WG-FSA-09/17 : Author(s): J. Roberts and D.J. Agnew (United Kingdom)
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Towards the development of an assessment of stock abundance for Subarea 88.2 SSRUs 88.2C–G
Abstract: This paper frames a discussion for improving the assessment of toothfish abundance for ... SSRUs 88.2C–G. We initially provide a characterisation of the fishery and a summary of available tagging ... fish have been recaptured. It is likely that the lack of recaptures of tagged fish in this region has ... been caused primarily by the poor spatial overlap of released tagged fish with subsequent fishing ...
Meeting Document : WG-FSA-14/59 : Author(s): S.M. Hanchet and S.J. Parker (New Zealand)
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Spatio–temporal dynamics in maturation and spawning of Patagonian toothfish Dissostichus eleginoides on the subantarctic Kerguelen Plateau
eleginoides in the Heard Island and McDonald Islands (HIMI) fishery on the Kerguelen Plateau in the Indian ... Sector of the Southern Ocean based on gonads and otoliths collected between years 2004–2015, and using ... throughout the late autumn and winter months of May–August, and spawning activity is concentrated on slopes ... along the west and south of the plateau around HIMI at depths of 1500–1900m. Comparison between ...
Meeting Document : WG-FSA-17/P04 : Author(s): P. Yates, P. Ziegler, D. Welsford, J. McIvor, B. Farmer and E.Woodcock
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Spatio-temporal variability in the winter diet of larval and juvenile Antarctic krill, Euphausia superba, in ice-covered waters
Abstract: Antarctic krill Euphausia superba is an ecological key species in the Southern Ocean ... and a major fisheries resource. The winter survival of age class 0 (AC0) krill is susceptible to ... changes in the sea-ice environment due to their association with sea ice and their need to feed during ... limited. We studied the spatio-temporal variability of the diet in 4 cohorts of AC0 krill in the Northern ...
Meeting Document : WG-EMM-18/P18 : Author(s): F.L. Schaafsma, D. Kohlbach, C. David, B.A. Lange, M. Graeve, H. Flores and J.A. van Franeker
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Hatching season and growth of Pleuragramma antarcticum larvae near the Antarctic peninsula in austral summer 1993/94
Abstract: Hatching season and larval growth of Pleuragramma antacticum in the water off Antarctic ... Peninsula were determined by the examination of growth increments in otoliths. The samples were collected by ... (54 inds. out of 77 fish larvae) in ichthyoplankton samples, and occurred mainly in cold water of the ... to 260 μm, and linearly related to body size (L); R =- 43.6 + 5.99 L (r2=0.79). The mean size of ...
Meeting Document : WG-EMM-96/65 : Author(s): Cha, S.S., Lee, T.W., Kim, S.
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Revised estimates of yield for Electrona carlsbergi based on a generalised version of the CCAMLR krill yield model
widely varying recruitment patterns, overestimation of the abundance of the stock and age of the most ... recent survey. These problems are addressed in this paper by using stock projections to assess the ... probabilities of the stock of Electrona carlsbergi becoming depleted over a 20 year period. These projections ... have been undertaken using a generalised version of the CCAMLR Krill Yield Model. This is appropriate ...
Meeting Document : WG-FSA-94/21 : Author(s): A.J. Constable and W.K. de la Mare (Australia)
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Temporal variability in Antarctic marine ecosystems: periodic fluctuations in the phocid seals
aspect of their biology: the age structure of crabeater seals (Lobodon carcinophagus) around the ... and with the Southern Oscillation Index (SOI). All of the seal data sets showed evidence of cyclical ... behavior when demodulated at a period of 5 yr. The Weddell seals were generally in phase with the SOI since ... the Weddell series began in 1970. The leopard seals and SOI were in phase in the 1960’s, but ...
Meeting Document : WG-CEMP-91/13 : Author(s): J.W. Testa, G. Oehlert, D.G. Ainley, J.L. Bengtson, D.B. Siniff, R.M. Laws and D. Rounsevell (USA)