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Changes in biomass of eight species of finfish around the South Orkney Islands (Subarea 48.2) from three bottom trawl surveys
Paper Title: Changes in biomass of eight species of finfish around the South Orkney Islands ... Germany in 1985, Spain in 1991 and the USA in 1999. From these surveys, estimates of total stock biomass ... were computed for the eight species of finfish which were most abundant in catches. Biomass levels and ... size composition from the March 1999 trawl survey were compared to previous surveys conducted in ... kg of N. rossii was caught in 1999, mostly in the eastern and western sectors (Figure 4g). Most ... CCAMLR Science, Vol. 7 (2000): 53-74 CHANGES IN BIOMASS ... the 500 m isobath of the South Orkney Islands, most recently by the Federal Republic of Germany in ... 1985, Spain in 1991 and the USA in 1999. From these surveys, estimates of total stock biomass were ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 53–74 : Автор(ы): Jones, C.D., K.-H. Kock and E. Balguerías
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Notes on the use of virtual population analysis for stock assessment of the mackerel icefish, Champsocephalus gunnari (Lönnberg, 1906) in Subarea 48.3 for the 1990/91 and 1991/92 seasons
icefish, Champsocephalus gunnari (Lönnberg, 1906) in Subarea 48.3 for the 1990/91 and 1991/92 seasons ... Assessment (WG-FSA) to satisfactorily assess in 1991 the status of the Champsocephalus gunnari population in ... techniques, from 1991 back to 1977. The predicted age structure, dominated in recent years by the 1987 year ... -class (1 year olds in 1988), was quite robust, despite the use of various combinations of survey and ... considered to be lost to the fishery. This could therefore be represented in the assessment as an increase ... ANALYSIS FOR STOCK AS.~ESSMENT OF THE MACKEREL ICEFISH, CHAMPSOCEPHALUS GUNNARI (LONNBERG, 19(6) IN ... failure of the CCAMLR Working Group on Fish Stock Assessment (WG-FSA) to satisfactorily assess in 1991 ... the status of the Champsocephalus gunnari population in Subarea 48.3 using VPA, attempts were made ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 49–79 : Автор(ы): Parkes, G.
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Long-term monitoring of krill recruitment and abundance indices in the Elephant Island area (Antarctic Peninsula)
Paper Title: Long-term monitoring of krill recruitment and abundance indices in the Elephant ... one- and two-year-old krill (R 1 and R 2 respectively). Statistically significant fluctuations in ... MONITORING OF KRILL RECRUITMENT AND ABUNDANCE INDICES IN THE ELEPHANT ISLAND AREA (ANTARCTIC PENINSULA) V ... significant fluctuations in krill density over the period 1977 to 1994 are also confirmed by this study using ... (Butterworth et al., 1994). Proportional recruitment indices for krill were recorded in a time series ... database in the Elephant Island area (South Shetland Islands, Antarctic Peninsula) covering the years ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 19–35 : Автор(ы): Siegel, V., W. de la Mare and V. Loeb
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Investigation of bias in the mark–recapture estimate of toothfish population size at South Georgia
Paper Title: Investigation of bias in the mark–recapture estimate of toothfish population size at ... uneven distribution of tag placements and recapture effort, on bias in the Petersen estimator of ... ) and upwards in a low-density box, so that they tended to be retained in high-density boxes. The model ... and/or fishing effort; by ‘ideal’, it is meant that either tagging or fishing effort was in direct ... InvestIgatIon of bIas In the mark–recapture estImate of toothfIsh populatIon sIze at south georgIa D.J. Agnew ... placements and recapture effort, on bias in the Petersen estimator of population size. It does so by ... when fish entered a high-density box (as indicated by high CPUE) and upwards in a low- density box, so ... that they tended to be retained in high-density boxes. The model allows simulation of releases by box ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 47–63 : Автор(ы): Agnew, D.J., G.P. Kirkwood, J. Pearce and J. Clark
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A quantified Bayesian Maximum Entropy estimate of Antarctic krill abundance across the Scotia Sea and in small-scale management units from the CCAMLR-2000 Survey
the Scotia Sea and in small-scale management units from the CCAMLR-2000 Survey Abstract / Description ... units (SSMUs), were estimated. Abundance in some of the individual SSMUs had not previously been ... estimated due to the sparseness of data in these regions. The MaxEnt formalism allows an objective choice of ... the error in the density estimates. The total biomass inferred for the survey area was 208 million ... QuAntified BAyesiAn MAxiMuM entropy estiMAte of AntArctic Krill ABundAnce Across the scotiA seA And in ... area, and within individual small-scale management units (SSMUs), were estimated. Abundance in some of ... the individual SSMUs had not previously been estimated due to the sparseness of data in these regions ... Bayesian framework also allows intrinsic calculation of the error in the density estimates. The total ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 97–116 : Автор(ы): Heywood, B.G., A.S. Brierley and S.F. Gull
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Timing of clutch initiation in Pygoscelis penguins on the Antarctic Peninsula: towards an improved understanding of off-peak census correction factors
Paper Title: Timing of clutch initiation in Pygoscelis penguins on the Antarctic Peninsula ... . In this paper the authors present an analysis relating to both these challenges. Clutch initiation ... Petermann Island) in relation to potential drivers of clutch initiation (e.g. temperature, precipitation ... factor related to the timing of clutch initiation in all three of the penguin species examined (Adélie ... (Barbraud and Weimerskirch, 2006) in Eastern Antarctica have Table 2: Environmental covariates examined ... of cluTch iniTiaTion in Pygoscelis penguins on The anTarcTic peninsula: Towards an improved ... cycle. In this paper the authors present an analysis relating to both these challenges. Clutch ... and Petermann Island) in relation to potential drivers of clutch initiation (e.g. temperature ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 149–165 : Автор(ы): Lynch, H.J., W.F. Fagan, R. Naveen, S.G. Trivelpiece and W.Z. Trivelpiece
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Marine mammals and demersal longline fishery interactions in Crozet and Kerguelen Exclusive Economic Zones: an assessment of depredation levels
Paper Title: Marine mammals and demersal longline fishery interactions in Crozet and Kerguelen ... toothfish (Dissostichus eleginoides) in the Crozet and Kerguelen Islands Exclusive Economic Zones (EEZs ... ) between 2003 and 2005. In the Crozet EEZ, the reported interactions involved killer whales and sperm ... whales. These two species, alone or in co-occurrence with each other, were observed in 71% of the 1 308 ... - noides off Chile, Eastern South Pacifi c. Toothed Whale/Longline Fisheries Interactions in the South ... ): 67–82 67 MARINE MAMMALS AND DEMERSAL LONGLINE FISHERY INTERACTIONS IN CROZET AND KERGUELEN ... ) in the Crozet and Kerguelen Islands Exclusive Economic Zones (EEZs) between 2003 and 2005. In the ... or in co-occurrence with each other, were observed in 71% of the 1 308 longlines set. In the ...
Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 67–82 : Автор(ы): Roche, C., C. Guinet, N. Gasco and G. Duhamel
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Myctophids in the diet of Antarctic predators
Paper Title: Myctophids in the diet of Antarctic predators Abstract / Description: The aim of ... , whales, fish and squids) in order to help evaluate the importance of myctophids in their diets. This ... review covers publications for the period since 1984-85 to the present. In total, over 50 publications ... found in the diet of one species of squid, 18 species of fish (Nototheniidae- eight, Channichthyidae ... and feeding ecology of emperor penguins in the eastern Weddell Sea. Polar Biology, 9(6): 385-390 ... SC-CAMLR-X/BG/6 MYCTOPHIDS IN THE DIET OF ANTARCTIC ... diet of various top predators (birds, seals, whales, fish and squids) in order to help evaluate the ... importance of myctophids in their diets. This review covers publications for the period since 1984-85 to the ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 335–368 : Автор(ы): Sabourenkov, E.
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A first attempt at an assessment of the Patagonian toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands EEZ
eleginoides) resource in the Prince Edward Islands EEZ Abstract / Description: The history of the fishery for ... Patagonian toothfish (Dissostichus eleginoides) in the Prince Edward Islands Exclusive Economic Zone (EEZ) is ... ELEGINOIDES) RESOURCE IN THE PRINCE EDWARD ISLANDS EEZ A. Brandão and D.S. Butterworth Marine Resource ... (Dissostichus eleginoides) in the Prince Edward Islands Exclusive Economic Zone (EEZ) is reviewed briefl y. It ... ) resource in the Prince Edward Islands Exclusive Economic Zone (EEZ) because of the high level of illegal ... catches that have been taken from this region, and because of a large drop in longline catch-per-unit ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 11–32 : Автор(ы): Brandão, A., D.S. Butterworth, B.P. Watkins and D.G.M. Miller
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Biological parameters for icefish (Chionobathyscus dewitti) in the Ross Sea, Antarctica
Paper Title: Biological parameters for icefish (Chionobathyscus dewitti) in the Ross Sea ... Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea (CCAMLR Subareas 88.1 and 88.2). Biological data ... Chionobathyscus dewitti, and showed no significant difference in sex ratio. Meristic, diet and age data were ... indices (GSIs) were calculated and plotted against sample month. There was a weak positive trend in GSI ... BIOLOGICAL PARAMETERS FOR ICEFISH (CHIONOBATHYSCUS DEWITTI) IN THE ROSS SEA, ANTARCTICA C.P. Sutton ... ) in the Ross Sea (CCAMLR Subareas 88.1 and 88.2). Biological data from 303 specimens were collected ... showed no significant difference in sex ratio. Meristic, diet and age data were consistent with previous ... calculated and plotted against sample month. There was a weak positive trend in GSI between December and ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 139–165 : Автор(ы): Sutton, C.P., M.J. Manning, D.W. Stevens and P.M. Marriott
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