Resultados de la búsqueda
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A simulation study of the method of deriving natural mortality rate using data for Champsocephalus gunnari in Subarea 48.3
Champsocephalus gunnari in Subarea 48.3 Abstract / Description: A method of determining the rate of natural ... been correctly chosen. Data for Champsocephalus gunnari in Subarea 48.3 are used to show that the ... described method is sound. When a mistake is made in the choice of natural mortality coefficient, the ... estimate of the intercept of the regression is other than zero. A bias in the intercept will be positive if ... the value of 0.35 used by the Working Group on Fish Stock Assessment (WG-FSA) in previous years. In ... group in the first fishing year is estimated from equation (8); (ii) the abundance values Na,l, a ... fishing year, and fish mean weight are given in Tables 1 and 2. The catch by weight of C. gunnari in ... DERIVING NATURAL MORTALITY RATE USING DATA FOR CHAMPSOCEPHALUS GUNNARI IN SUB AREA 48.3 P.S. Gasyukov ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 69–83 : Autor(es): Gasyukov, P.S. and R.S. Dorovskikh
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Alternative methods for determining subarea or local area catch limits for krill in Statistical Area 48
Paper Title: Alternative methods for determining subarea or local area catch limits for krill in ... precautionary catch limit on krill (Euphausia superba) in Statistical Area 48. The measure also implies an ... application in future of precautionary limits to subareas or local areas of this area. Nine alternative ... current fishing patterns; and (vi) the potential for delay in implementing the alternative. An alternative ... Penguins in the South Shetland Islands, Antarctica. British Antarctic Survey Bulletin, 81: 19-30. 247 ... single year. Then, for the following two years, that subarea would be closed to fishing. For example, if ... SUBAREA OR LOCAL AREA CATCH LIMITS FOR KRILL IN STATISTICAL AREA 48 G. Watters and R.P. Hewitt ... (Euphausia superba) in Statistical Area 48. The measure also implies an application in future of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 237–249 : Autor(es): Watters, G. and R.P. Hewitt
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Catch per unit effort and proportional recruitment indices from Japanese krill fishery data in Subarea 48.1
fishery data in Subarea 48.1 Abstract / Description: Proportional recruitment indices and CPUE in Subarea ... . CPUE (catch/towing volume) in the Livingston Island area showed a decreasing trend during the study ... period. The use of different fishing strategies in response to a demand for higher product quality and a ... general decrease in krill density in the study area were considered as possible reasons for this. On the ... of Log,,,CPUE with increasing years in the Livingston Island area (T = -0.695, n = 15, p = 0.0003 ... waters and in some years they are mainly distributed close to the Peninsula (Siegel, 1988), age l ... . They showed peaks around the 1980/81, 1981/82 and 1985/86 year classes, and low values in between ... testing Log1,CPUE versus year in both areas. The results of the test showed a significant negative trend ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 47–63 : Autor(es): Kawaguchi, S., T. Ichii and M. Naganobu
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RECENT POPULATION ESTIMATES AND TRENDS IN NUMBERS OF ALBATROSSES AND GIANT PETRELS BREEDING AT THE SUB-ANTARCTIC PRINCE EDWARD ISLANDS
group (Marion and Prince Edward islands) was conducted during December 2008, seven years after the ... have remained stable, whereas the population on Prince Edward Island decreased by 20% from 2001 to 2008 ... similar in 2001 and 2008. Counts of both sooty albatrosses Phoebetria spp. were substantially higher at ... Prince Edward Island in 2008, possibly as a result of better coverage compared to 2001. Dark-mantled ...
Meeting Document : WG-EMM-10/P4 : Autor(es): P.G. Ryan, M.G.W. Jones, B.M. Dyer, L. Upfold and R.J.M. Crawford
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Recent population estimates and trends in numbers of albatrosses and giant petrels breeding at the sub-Antarctic Prince Edward Islands
group (Marion and Prince Edward islands) was conducted during December 2008, seven years after the ... have remained stable, whereas the population on Prince Edward Island decreased by 20% from 2001 to 2008 ... similar in 2001 and 2008. Counts of both sooty albatrosses Phoebetria spp. were substantially higher at ... Prince Edward Island in 2008, possibly as a result of better coverage compared to 2001. Dark-mantled ...
Meeting Document : WG-EMM-10/P04 : Autor(es): P.G. Ryan, M.G.W. Jones, B.M. Dyer, L. Upfold and R.J.M. Crawford
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Aerobic dive limit: how often does it occur in nature?
animal is it’s aerobic dive limit (ADL). The ADL has only been measured in a few species. The goal of ... constraint in their everyday behaviors. An important component of the physiological capability of any diving ... within the cADL. In contrast, many individuals of both sea lion species exceeded the cADL, some by ... with the dive pattern of individual animals. In both Antarctic Fur Seals and Australian sea lions ...
Meeting Document : WG-EMM-00/48 : Autor(es): D.P. Costa, N.J. Gales and M.E. Goebel (USA)
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A statistical method for analysing the extent of IUU fishing in CCAMLR waters: application to Subarea 48.3
incident. 5. Three years were analysed, 1998/99, 1999/00 and 2000/01. Each year covered fully the period 1 ... used previously to estimate IUU activity in CCAMLR. We recommend its continued use in Subarea 48.3 and ... to South Georgia covers all possible areas of fishing for toothfish in Subarea 48.3. The method uses ... data from FPV cruises in Subarea 48.3, and the encounters between FPVs and IUU fishing activity, to ...
Meeting Document : WG-FSA-02/4 : Autor(es): D.J. Agnew and G.P. Kirkwood (United Kingdom)
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Cephalopod research in the Antarctic
Paper Title: Cephalopod research in the Antarctic Abstract / Description: Cephalopods are a ... policy for management of Antarctic cephalopods. In view of the rapidity that cephalopod fisheries can ... successfully raised in rabbits and testing is being carried out for cross reactions with other pelagic ... data in turn may be useful, in the future, for predicting year class strength of exploited species ... - 323 - CEPHALOPOD RESEARCH IN THE ANTARCTIC P.G ... cephalopods. In view of the rapidity that cephalopod fisheries can develop there is need for co-ordinated ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 323-334 : Autor(es): Rodhouse, P.G.
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Detection of anti-brucella antibodies in Weddell seals (Leptonychotes weddellii) from Cape Shirreff, Antarctica
de Medicina Preventiva Animal, Facultad de Ciencias Veterinarias y Pecuarias of the Universidad de ... immunoassay: Compelisa®?(Veterinary Laboratories Agency, UK) and c-ELISA (FAO/IAEA, 1994). In five of the ... bacteria of the genus Brucella in L. weddellii and point out the necessity of complementary studies to know ... the etiology and their infection epidemiology in this region of the world. Author(s): O. Blank, P ...
Meeting Document : WG-EMM-01/48 : Autor(es): O. Blank, P. Retamal, P. Abalos and D. Torres (Chile)
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INTERACTIONS OF PATAGONIAN TOOTHFISH FISHERIES WITH KILLER AND SPERM WHALES IN CROZET EXCLUSIVE ECONOMIC ZONE: AN ASSESSMENT OF DEPREDATION LEVELS AND INSIGHTS ON POSSIBLE MITIGATION SOLUTIONS
longline fishery is exposed to high levels of depredation by killer and sperm whales. In this context, this ... study (i) provides estimations of annual depredation levels on a 5-years period (2003-2008), (ii ... the largest part of this loss (70%) while sperm whales had a lower impact (30%). Photo-identification ... belonging to four different pods were involved in 81.3% of the interaction events. We also estimated that a ...
Meeting Document : WG-IMAF-09/12 : Autor(es): P. Tixier, N. Gasco, G. Duhamel and C. Guinet (France)