Search results
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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
respectively. Ashford et al. (1996) reported high levels of depredation with ‘almost the entire catch’ lost ... 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 ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 111–126 : Author(s): Purves, M.G., D.J. Agnew, E. Balguerías, C.A. Moreno and B. Watkins
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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
. Nototlzenia rossii A total of 273 kg of N. rossii was caught in 1999, mostly in the eastern and western ... 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 ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 53–74 : Author(s): Jones, C.D., K.-H. Kock and E. Balguerías
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Fatty acid and stable isotope analyses to infer diet of Antarctic toothfish caught in the southern Ross Sea
and P.D. Nichols. 2009. Lipid composition and diet inferences in abyssal macrourids of the eastern ... 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 ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 21–36 : Author(s): Jo, H.-S., I. Yeon, C. Lim, S.M. Hanchet, D.-W. Lee and C.-K. Kang
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Long-term monitoring of krill recruitment and abundance indices in the Elephant Island area (Antarctic Peninsula)
area and drifted north of the continental slope to the northeast and crossed the eastern boundary ... with hi fest mean density (1977/78) with the remainder, e inning with the year with lowest density, Tb ... 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 ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 19–35 : Author(s): Siegel, V., W. de la Mare and V. Loeb
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A first attempt at an assessment of the Patagonian toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands EEZ
lost to killer whales (Orcinus orca) and sperm whales (Physeter catodon). Two of the vessels have ... . The figures for 2000/01 were calculated as 2 fishing vessels x 40 fishing days x 2 fishing trips/year x 1.1 ... is essential. To date two aerial and one sea reconnaissance trips have been undertaken by South Africa ... 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 ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 11–32 : Author(s): Brandão, A., D.S. Butterworth, B.P. Watkins and D.G.M. Miller
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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
method (Baranov, 1914), where: Z = _In(N(a+1,Y+l)) Na,y (5) The results are presented in Table 11 ... be considered to be lost to the fishery. This could therefore be represented in the assessment as an increase ... 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 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 49–79 : Author(s): Parkes, G.
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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
. This is a clear example of the spatial information which would be ignored by, and hence lost ... 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 ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 97–116 : Author(s): 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
) in Eastern Antarctica have Table 2: Environmental covariates examined as potential drivers of the timing ... 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 ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 149–165 : Author(s): Lynch, H.J., W.F. Fagan, R. Naveen, S.G. Trivelpiece and W.Z. Trivelpiece
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Investigation of bias in the mark–recapture estimate of toothfish population size at South Georgia
as the length of the straight line shown in Figure 3. The boxes on the eastern side of South Georgia were ... with the object of exam- ining the consequences of uneven distribution of tags and fishing effort. The model ... 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 ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 47–63 : Author(s): Agnew, D.J., G.P. Kirkwood, J. Pearce and J. Clark
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Length-based assessments revisited – why stock status and fishing mortality of long-lived species such as toothfish cannot be inferred from length-frequency data alone
management: ap- plication to the broadbill swordfish fishery off eastern Australia. Mar. Freshw. Res., 52 ... / Description: In many of CCAMLR’s new and exploratory fisheries, stock assessment techniques are still in ... development. The failure of the tag-recapture program to provide robust assessments in many areas and doubts ... and fishing mortality from length-frequency data alone. In this paper, a number of length-based stock ... assessment methods are revisited and some limitations in their ability to draw robust inferences about stock ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 57–73 : Author(s): Ziegler, P.E., D.C. Welsford and A.J. Constable