Search results
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Lessons from CCAMLR on the implementation of the ecosystem approach to managing fisheries
widely recognised as a leading international organisation in developing best-practice in the ecosystem ... . CCAMLR is demonstrating that EBFM does not need to equate to complexity in management and that methods ... predators on their prey. Science has an important role in implementing EBFM, not only in measuring and ... assessing the status of target species and their predators, but also in designing cost-effective management ...
Meeting Document : WG-EMM-12/P06 : Author(s): A.J. Constable
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Population, breeding, diet and conservation of Crozet shag Phalacrocorax [atriceps] melanogenis at Marion Island, 1994/95 to 2002/03
at subantarctic Marion Island decreased by 68% from 841 pairs in 1994/95 to 272 pairs in 2002/03. The ... birds breeding in any given season. The decreases coincided with a period of warming and reduced ... precipitation at Marion Island and with a decrease in the number of gentoo penguins Pygoscelis papua breeding ... there. Both these seabird species forage inshore and there is considerable overlap in their diets ...
Meeting Document : WG-EMM-03/17 : Author(s): R.J.M. Crawford, J. Cooper, B.M. Dyer, A.C. Wolfaardt, D. Tshingana, K. Spencer, S.L. Petersen, J.L. Nel, D.G. Keith, C.L. Holness, B. Hanise, M.D. Greyling and M. du Toit (South Africa)
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On influence of acoustic survey methodology improvement on krill biomass estimation. (A comparison of results of acoustic surveys based on single-frequency and double-frequency algorithms)
Abstract: Substantial improvements in data collection and analytical methodologies of acoustic ... influence of such improvements on krill biomass estimation. The letter seems to become useful in comparative ... algorithms that were obtained by processing data on Russian R/V ATLANTIDA surveying in 48.4 Subarea according ... difference in krill biomass estimates. A difference was more than 1.8 times in the case under consideration ...
Meeting Document : WG-EMM-01/41 : Author(s): S.M. Kasatkina and A.P. Malyshko (Russia)
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Preliminary results on by-catch of fishes caught by the fishery vessel Chiyo Maru No. 3 to the north of the South Shetland Islands (February to March, 1996)
in 41 hauls. Notothenioid juveniles were found in 30 hauls carried out in waters with a depth of 87 ... in 11 hauls operated at some distance from the shelf, in the offshore waters with a depth of 275 ... -1780m (average 1006m). Notothenioid juveniles never caught with bathypelagic fish species in all hauls ... found in 15 hauls, and its estimated value of an arithmetic mean was 4±19 ind./t (0 to 140 ind./t) of ...
Meeting Document : WG-EMM-96/52 : Author(s): Ichii, T., Kawaguchi, S., Naganobu, M.
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A simulation study of krill fishing by an individual Japanese trawler
, and their performance investigated in response to six different ways in which the overall krill ... biomass in a 600 n. mile square oceanic sector might decline by 50%. In most cases there is essentially no ... response of the index, or a response rather smaller in relative magnitude than the biomass decline. Catch ... statistics collected at present (centred primarily on catch per fishing time) are of low utility in detecting ...
Meeting Document : SC-CAMLR-VI/BG/38 : Author(s): D.S. Butterworth (United Kingdom)
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Linking predator and prey behaviour: contrasts between Antarctic fur seals and macaroni penguins at South Georgia
are the two main land-based krill Euphausia superba consumers in the northern Scotia Sea. Using a ... -based (animal tracking and diet analysis) techniques, we examined variability in the foraging ecology of ... from acoustic surveys was low during summer, increasing in autumn. During the breeding season, krill ... occurred in 80% of fur seal diet samples, with fish remains in 37% of samples. Penguin diets contained the ...
Meeting Document : WG-EMM-10/P07 : Author(s): C.M. Waluda, M.A. Collins, A.D. Black, I.J. Staniland and P.N. Trathan
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CCAMLR Science
those with a particular interest in living resources management and Antarctic matters. Papers published ... in the journal cover numerous disciplines, including the biology and ecology of marine species, their ... the papers published in the journal were originally submitted to the CCAMLR Scientific Committee or ... , if approved, is sent out for peer review. In 2016 annual publication of CCAMLR Science was ...
Page : Site Section: Publications
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Diet variability and reproductive performance of macaroni penguins (Eudyptes chrysolophus) at Bird Island, South Georgia
(Euphausia superba) was the main prey in 17 out of 22 years. Amphipods (Themisto gaudichaudii) were the main ... prey in 1994 and 2009, fish in 2004, and euphausiids other than E. superba (Thysanoessa spp. and E ... . frigida) in 2000. There was no clearly dominant prey group in 1999. The five-year average proportion of E ... frequency occurrence of T. gaudichaudii both increased with a decreasing proportion of E. superba in the ...
Meeting Document : WG-EMM-12/17 : Author(s): C.M. Waluda, S.L. Hill, H.J. Peat and P.N. Trathan (United Kingdom)
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Marine Debris
The CCAMLR Marine Debris program was established in 1989 to monitor debris levels in the ... CCAMLR Marine Debris Database contains data from 15 sites, predominantly in the Antarctic Peninsula and ... CCAMLR as the general health of the environment affects the species covered by the Convention. In ... debris entering the marine system and to mitigate its impact in the Convention Area. Specific measures ...
Page : Site Section: Science
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Influence of the quality and quantity of data from a multi-year tagging program on bias and precision of biomass estimates from an integrated stock assessment – update
program, in particular the effects of the size (tag size-overlap) and numbers of tagged fish, the duration ... of the tagging program, the type of auxiliary data used in the assessment, and the catch history ... emerged within this overall trend. The results show that in the early stages of the tagging program, a ... with a low tag size-overlap, even with large numbers, is likely to result in overestimates of biomass ...
Meeting Document : WG-FSA-12/18 : Author(s): P.E. Ziegler (Australia)