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Killer whale (Orcinus orca) and sperm whale (Physeter macrocephalus) interactions with longline vessels in the Patagonian toothfish fishery at South Georgia, South Atlantic
with longline vessels in the Patagonian toothfish fishery at South Georgia, South Atlantic Abstract ... ). Demersal longlines, targeting Patagonian toothfish (Dissostichus eleginoides), were deployed in depths of ... most abundant marine mammal observed in the vicinity of vessels when lines were being hauled, being ... whales were most often observed in the day, generally in the afternoon, while night-time interactions ... ) INTERACTIONS WITH LONGLINE VESSELS IN THE PATAGONIAN TOOTHFISH FISHERY AT SOUTH GEORGIA, SOUTH ATLANTIC M.G ... longlines, targeting Patagonian toothfi sh (Dissostichus eleginoides), were deployed in depths of 169 to 2 ... abundant marine mammal observed in the vicinity of vessels when lines were being hauled, being present ... whales were most often observed in the day, generally in the afternoon, while night-time interactions ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 111–126 : Autor(es): Purves, M.G., D.J. Agnew, E. Balguerías, C.A. Moreno and B. Watkins
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Fatty acid and stable isotope analyses to infer diet of Antarctic toothfish caught in the southern Ross Sea
in the southern Ross Sea Abstract / Description: To infer important prey resources for Antarctic ... toothfish (Dissostichus mawsoni) in the southern Ross Sea, their lipid composition was determined and ... compared to lipid profiles of fish and invertebrate species taken as by-catch in the fishery or collected ... toothfish in February 2012. Results of fatty acid (FA) and stable isotope analyses from this study provide ... TOOTHFISH CAUGHT IN THE SOUTHERN ROSS SEA H.-S. Jo, I. Yeon, C. Lim Fisheries Resources Research ... prey resources for Antarctic toothfish (Dissostichus mawsoni) in the southern Ross Sea, their lipid ... in the fishery or collected from the stomachs of toothfish. Stable carbon and nitrogen isotope ... during a longline survey of pre-recruit toothfish in February 2012. Results of fatty acid (FA) and ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 21–36 : Autor(es): Jo, H.-S., I. Yeon, C. Lim, S.M. Hanchet, D.-W. Lee and C.-K. Kang
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Effect of line sink rate on albatross mortality in the Patagonian toothfish longline fishery
Paper Title: Effect of line sink rate on albatross mortality in the Patagonian toothfish longline ... vessels using bird-scaring lines and setting lines in propeller turbulence, longline sink rates >0.3 m ... SINK RATE ON ALBATROSS MORTALITY IN THE PATAGONIAN TOOTHFISH LONGLINE FISHERY G.G. Robertson ... setting lines in propeller turbulence, longline sink rates >0.3 m/s should greatly reduce the incidental ... toothfish (Dissostichus eleginoides) commenced in the CCAMLR Convention Area in the late 1980s, and in the ... 1996/97 fishing season there were 16 longline vessels fishing legally for toothfish in CCAMLR areas ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 133–150 : Autor(es): Robertson, G.G
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A proposed management procedure for the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity
) resource in the Prince Edward Islands vicinity Abstract / Description: The status of the toothfish ... resource in the Prince Edward Islands region is unclear because CPUE data suggest considerable depletion ... future TACs in the face of this appreciable uncertainty. Four Operating Models (OMs) reflecting ... resource. The MP uses two data sources: the recent trend in longline CPUE and the mean length of the ... MANAGEMENT PROCEDURE FOR THE TOOTHFISH (Dissostichus eleginoiDes) RESOURCE IN THE PRINCE EDWARD ISLANDS ... Email – anabela.brandao@uct.ac.za Abstract The status of the toothfish resource in the Prince Edward ... Procedure (MP) approach is proposed to provide a sound scientific basis to recommend future TACs in the ... uses two data sources: the recent trend in longline CPUE and the mean length of the catches made. An ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 33–69 : Autor(es): Brandão, A. and D.S. Butterworth
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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 : Autor(es): 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 : Autor(es): 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 : Autor(es): 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 : Autor(es): 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 : Autor(es): 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 : Autor(es): Lynch, H.J., W.F. Fagan, R. Naveen, S.G. Trivelpiece and W.Z. Trivelpiece