Résultats de la recherche
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A three-frequency method to determine the abundance and the size of two euphausiid species (Euphausia superba and Euphausia crystallorophias)
role in the Ross Sea pelagic ecosystem (Marr, 1962; Azzali et al., 1999). To estimate the abundance of ... of the net and to the net avoidance (Wiebe, 1972; Everson and Bone, 1986). This last bias affects ... obtain information about the mean size (length) of the organisms in each aggregation. In principle the ... abundance of the two populations can be estimated by single-frequency acoustics, using the standard echo ...
Meeting Document : WG-EMM-01/63 : Auteur(s): M. Azzali, J. Kalinowksi, G. Lanciani and I. Leonori (Italy)
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Patterns and processes in the distribution and dynamics of Antarctic krill
spatially variable growth rates of krill, krill loss rates due to predators, and density-dependent ... Paper Title: Patterns and processes in the distribution and dynamics of Antarctic krill Abstract ... / Description: A general framework is presented to develop, test and integrate component models of the ... distribution and dynamics of Antarctic krill population at various spatial and temporal scales. We suggest that ... variable growth rates of krill, krill loss rates due to predators, and density-dependent attraction of ... phytoplankton availability; 2. Krill loss rates are functions of predator abundance; 3. On broad scales ... DISTRIBUTION AND DYNAMICS OF ANTARCTIC KRILL S.A. Levin, A. Morin and T.M. Powell Abstract A general ... framework is presented to develop, test and integrate component models of the distribution and dynamics of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 281–299 : Auteur(s): Levin, S.A., A. Morin and T.M. Powell
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An assessment of CCAMLR measures employed to mitigate seabird mortality in longlining operations for Dissostichus eleginoides around South Georgia
Paper Title: An assessment of CCAMLR measures employed to mitigate seabird mortality in ... the effectiveness of measures employed by CCAMLR to mitigate seabird mortality. Following an agreement ... between the Governments of the United Kingdom and Chile, a UK observer was placed aboard a Chilean ... specifications was also used, except during an experiment that attempted to assess the effectiveness of the ... aboard the BF Cisne Verde. This consisted of a retaining line, and a mother line made up of a series of ... mother line was attended by one or two winchmen working a watch of c. 3 to 4 hours. As they came to the ... sampling of toothfish was taking place, and as far as possible to cover the early, middle and late stages ... . For sampling units, the mother line was divided into lengths of 30 coils using sequences of three ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 217–230 : Auteur(s): Ashford, J.R. and J.P. Croxall
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Distribution of fish larvae at South Georgia: horizontal, vertical, and temporal distribution and early life history relevant to monitoring year-class strength and recruitment
East Bay the early stages of many species were found throughout the water column. In summer only four ... Paper Title: Distribution of fish larvae at South Georgia: horizontal, vertical, and temporal ... / Description: Four studies on the early life history stages of Antarctic fish at South Georgia are reported ... abundant near the coast, but rare in oceanic waters. During winter in the 265 m deep fiord of Cumberland ... near the middle of the north-east coast of South Georgia. Conclusions The early stages of the ... , but rare in oceanic waters. During winter in the 265 m deep fiord of Cumberland East Bay the early ... length is also given; this includes data from a study in the fiord of CUmberland East Bay during 20 ... and in cumberland East Bay at densities of about 2 000 per 105 m3 • The highest catches were not ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 105-141 : Auteur(s): North, A.W.
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Age and growth of the Antarctic skate (Amblyraja georgiana) in the Ross Sea
ages at maturity of 6–7 years for males and 8–11 years for females. These estimates are near the middle ... Paper Title: Age and growth of the Antarctic skate (Amblyraja georgiana) in the Ross Sea Abstract ... / Description: X-rays of vertebral half-centra, and x-rays and transmitted white light examination of caudal ... thorns, were used to estimate the ages of the Antarctic skate (Amblyraja georgiana) from the Ross Sea ... –7 years for males and 8–11 years for females. These estimates are near the middle to upper end of ... skate, but usually they fell in the middle of the size range (Figure 1); this is consistent with the ... years for females. These estimates are near the middle to upper end of the range of ages at maturity ... , Vol. 12 (2005): 183–194 183 AGE AND GROWTH OF THE ANTARCTIC SKATE (AMBLYRAJA GEORGIANA) IN THE ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 183–194 : Auteur(s): Francis, M.P. and C. Ó Maolagáin
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Schedule of conservation measures in force 2014/15 – individual pdf files
Description / Abstract: This zip file contains the complete Schedule of conservation measures in ... species and no more than 50 tonnes for an entire fishing trip by a vessel. 5 For the purposes of ... . Radio call sign RC M Vessel registration detail; international radio call sign of the vessel. Trip ... total loss of the fishing vessel, loss of life, severe damage to the marine environment 9 , serious ... 10-01.pdf CONSERVATION MEASURE 10-01 (2014) 1 Marking of fishing vessels and ...
Document : Site Section: Conservation and Management
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Fishing for toothfish using pots: results of trials undertaken around South Georgia, March–May 2000
Paper Title: Fishing for toothfish using pots: results of trials undertaken around South Georgia ... , March–May 2000 Abstract / Description: During the period March to May 2000, the UK undertook trials of ... commercial viability of this fishing method for toothfish fisheries in the CCAMLR Convention Area. While the ... method successfully caught D. eleginoides, there was a large by-catch of crab species. The catch rate of ... TOOTHFISH USING POTS: RESULTS OF TRIALS UNDERTAKEN AROUND SOUTH GEORGIA, MARCH-MAY 2000 D.J. Agnew ... Renewable Resources Assessinent Group Imperial College, Royal School of Mines Prince Consort Road ... period March to May 2000, the UK undertook trials of a pot fishing method to catch Patagonian toothfish ... the trial and the results, and discusses the commercial viability of this fishing method for ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 93–105 : Auteur(s): Agnew, D.J., T.M. Daw, G.M. Pilling and M.G. Purves
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The use of CCAMLR Statistical Subareas 88.1 and 88.2 and Division 58.4.1 by Macquarie Island giant petrels
enter CCAMLR waters, one bird undertook a longer trip into division 58.4.1, where it spent 6% of its ... overall time at sea. We consider it possible that this trip may have been indicative of trips undertaken ... adult northern giant petrels (Macronectes halli), and two fledgling chicks of each species during the ... summer of 2005-06. Adults of both species spent time in areas under CCAMLR jurisdiction. Adult southern ...
Meeting Document : WG-FSA-06/49 : Auteur(s): R. Trebilco, R. Gales, B. Baker and A. Terauds (Australia)
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Line weights of constant mass (and sink rates) for Spanish system Patagonian toothfish longline vessels
Paper Title: Line weights of constant mass (and sink rates) for Spanish system Patagonian ... with seabirds. The weights typically used are collections of rocks enclosed in netting bags. During ... become progressively lighter, requiring ongoing repair. This problem can be solved by use of ... relationship between the sink rates of longlines equipped with bags of rocks (4, 6 and 8 kg) and those with ... Fuego is a 53.6 m Japanese-built (1972) tuna vessel con- verted to the Spanish system of fishing. In ... modified version of the former method to avoid fish loss by toothed whales) were tested in the experiment ... compared to loss of rocks from the bags. Each 8.5 kg weight typically comprises sev- eral rocks of ... WEIGHTS OF CONSTANT MASS (AND SINK RATES) FOR SPANISH-SYSTEM PATAGONIAN TOOTHFISH LONGLINE VESSELS G ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 93–106 : Auteur(s): Robertson, G., C.A. Moreno, E. Gutiérrez, S.G. Candy, E.F. Melvin and J.P. Seco Pon
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Fitting Euphausia superba into Southern Ocean food-web models: a review of data sources and their limitations
Paper Title: Fitting Euphausia superba into Southern Ocean food-web models: a review of data ... include krill in food-web models and to guide modellers to key sources of data. It describes the strengths ... of each method of sampling krill, i.e. with nets (for historical time series, demographic information ... . Temporally, the intense (order of magnitude) interannual variability in krill population size within the ... aspects of krill biology have been reviewed (e.g. Marr, 1962; Miller and Hampton, 1989; Quetin et al ... et al., 2010). Analy- ses of large-scale composites of net data (e.g. Marr, 1962; Mackintosh, 1973 ... the southwest (SW) Atlan- tic sector with 75% of the population in the 0–90°W sector (Marr, 1962 ... to be two ‘populations’ of krill, one in the ACC and another in the East Wind Drift, much closer to ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 219–245 : Auteur(s): A. Atkinson, S. Nicol, S. Kawaguchi, E. Pakhomov, L. Quetin, R. Ross, S. Hill, C. Reiss, V. Siegel, G. Tarling (submitted to the 2008 Joint CCAMLR-IWC Workshop)