Search results
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Fitting Euphausia superba into Southern Ocean food-web models: a review of data sources and their limitations
. Difficulties in sampling krill across their full habitat and in experimentation mean that sig- nificant ... , 1989; Nicol et al., 2000a; Siegel, 2005) with a conservative recent estimate of 19 million km2 ... m–2 is a product of the no. m–3 and the habitat volume (Figure 1). This means that the great habitat volume ... studies dur- ing the CCAMLR 2000 Krill Synoptic Survey of Area 48 revealed broadly similar mean biomass ... include krill in food-web models and to guide modellers to key sources of data. It describes the strengths ... . Temporally, the intense (order of magnitude) interannual variability in krill population size within the ... are still not yet confident which are the major predators of krill but studies increasingly suggest ... Paper Title: Fitting Euphausia superba into Southern Ocean food-web models: a review of data ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 219–245 : Author(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)
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The relationship between sea-ice cover and Adélie penguin reproductive performance at Béchervaise Island
population growth in response to a reduction in the frequency of heavy sea-ice years. However, it is ... the form of sea-ice present, the season in which it is present and the processes that such sea-ice ... penguin populations through a variety of processes operating at different spatial and temporal scales. The ... Smith et al. (1999) conceptual model of Adélie penguin population growth incorporates the relationship ...
Meeting Document : WG-EMM-07/21 : Author(s): L. Emmerson and C. Southwell (Australia)
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The Antarctic toothfish: how common a prey for Weddell seals?
. In addition to past reports of isolated toothfish captures, the frequency of these observations and ... Weddell seals, and that the recent development of a toothfish fishery in the Ross Sea may have broader ... the quantity of toothfish captured lead us to suggest that this species is a significant prey item for ... impacts than expected. This is especially important in the McMurdo Sound region as toothfish are probably ...
Meeting Document : WG-EMM-07/P4 : Author(s): P.J. Ponganis and T.K. Stockard (USA)
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Marine debris and fishing gear associated with seabirds at sub Antarctic Marion Island – 1998/99
Abstract: Most (52%) of the 306 debris items found in association with seabirds at Marion Island ... wandering albatross study colonies showed that there had been a slight decrease in the accumulation rate of ... much higher than the 1996/97 season. This is consistent with a decrease in the number of unsanctioned ... fishing vessels present in the close vicinity of the island. Standardized searches of greyheaded mollymawk ...
Meeting Document : SC-CAMLR-XVIII/BG/14 : Author(s): Delegation of South Africa
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Distributions and predator-prey interactions of macaroni penguins, Antarctic fur seals, and Antarctic krill near Bird Island, South Georgia
between the distributions of predators and their prey with respect to the abundance of krill in the water ... macaroni penguins were concentrating their foraging for krill in the vicinity of the shelf-break. Author(s ... Abstract: We studied the distributions, abundances and interactions of macaroni penguins Eudyptes ... transects radiating from the breeding colonies of the vertebrate predators. We examined the relationships ...
Meeting Document : WG-CEMP-93/12 : Author(s): G.L. Hunt, Jr (USA), D. Heinemann (USA) and I. Everson (United Kingdom)
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Performance of an acoustic sonde design
is widely recognized. At a U.S. GLOBEC workshop in 1991, one of the considered problems was measuring ... Abstract: The potential of multi-frequency acoustic technology for quantifying fish and plankton ... macrozooplankton and micronekton. It was concluded that in order to survey animals in the size range 0.5-5 cm, it ... would be expedient to use at least three and perhaps as many as 8-10 frequencies in the range 38-420 kHz ...
Meeting Document : WG-EMM-95/09 : Author(s): Foote, K.G.
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Tag linking – revised algorithm (2019)
transparency and provides an index of the level of confidence in all linked mark-recapture data. The ... descriptions and diagnostics that could be provided to facilitate the adoption of this change in tag-linking ... Abstract: The CCAMLR Tagging Programme is a key part of CCAMLR’s management of toothfish ... fisheries and linking the details of recaptured fish to that of tagged fish is a key element of the ...
Meeting Document : WG-SAM-2019/07 : Author(s): CCAMLR Secretariat
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Revised joint research proposal for Dissostichus spp. in Subarea 88.3 by Korea and New Zealand
the abundance of Antarctic toothfish in Subarea 88.3. Secondary objectives are to improve ... understanding of stock structure of toothfish in this area, to carry out calibration trials between the two ... released on the slope, whilst also prospecting two of the northern seamount complexes and two boxes on the ... southern shelf, where little or no fishing has occurred. The main objective of the proposal is to determine ...
Meeting Document : WG-FSA-18/42 : Author(s): Delegations of the Republic of Korea and New Zealand
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Species profile of mackerel icefish (Champsocephalus gunnari)
and became the target species of fisheries in many parts of the low-Antarctic from 1975 to 1990 ... ’s with annual catches of a few thousand tonnes in each of the two areas. Aspect of the biology and ... exploitation of the species have been summarized in Kock and Everson (2003) and Kock (2005). Additional ... . Exploitation has been limited to South Georgia and Heard and McDonald Islands since the second half of the 1990 ...
Meeting Document : WG-FSA-07/12 : Author(s): K.-H. Kock (Germany) and I. Everson (UK)
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APPLYING A TS-PROBE FOR MEASURING ANTARCTIC KRILL (EUPHAUSIA SUPERBA) TARGET STRENGTH IN SITU: PROCEDURES AND DATA ANALYSIS
strength of Antarctic krill in situ at short range. The experimental methods, procedure for data retrieval ... operating at 38, 120 and 200 kHz is installed in the probe, connected to three pressure resistant ... transducers with 7o half power beam opening angles. The orientation of the probe was monitored with sensors ... transducer platform with the purpose of measuring the orientation of the organisms. All system communication ...
Meeting Document : SG-ASAM-09/13 : Author(s): G. Skaret, L. Calise and E. Ona (Norway)