Search results
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Age distribution of breeding female Antarctic fur seals in relation to changes in population growth rate
Abstract: The age distribution of breeding female Antarctic fur seals at Bird Island, South ... Georgia, in 1988 was compared with the age distribution of a sample obtained in 1971-1973. The mean age in ... age-dependent arrival time at the pupping beach in 1988, the mean age was 6.22 (SE = 0.14 years ... ), which was significantly lower than in 1971-1973. Indicators of population size suggested that population ...
Meeting Document : WG-CEMP-91/21 : Author(s): I.L. Boyd, N.J. Lunn, P. Rothery and J.P. Croxall (United Kingdom)
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Preliminary analysis of toothfish catch, CPUE, size structure and mark-recapture data from SSRUs 486A and 486G, with comments on the sustainability of different harvest levels
Poisson mass distribution function. The bulk of the model parameters are held constant at levels reported ... Abstract: Available catch, effort, catch-at-size and tagging data for Statistical Subarea 48.6 ... in Subarea 48.6 north of 60°S (the combined SSRUs 48.6A and 48.6G). A preliminary assessment for D ... . mawsoni in Subarea 48.6 south of 60°S (the combined SSRUs 48.6B through 48.6E) is given in an Appendix. An ...
Meeting Document : WG-FSA-12/31 : Author(s): E. Thomson and M. Bergh (South Africa)
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Age validation of Patagonian toothfish (Dissostichus eleginoides) from Heard and Macquarie Islands
number of observed increments after the mark in relation to the time-at-liberty between tagging and ... number of increments was the same as the observed increments for 88% of cases (when the time-at-liberty ... was known at the time of reading and 52% when the time-at-liberty was not known These results indicate ... counting presumed growth increments on the sectioned face of sagittal otoliths. While there is a general ...
Meeting Document : WG-FSA-05/60 : Author(s): K. Krusic-Golub and R. Williams (Australia)
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Revised biological parameters for the Antarctic skates Amblyraja georgiana and Bathyraja cf. eatonii from theRoss Sea
different estimates of median length at maturity. The lab estimates were based on small datasets that did ... value of 66 cm PL. There are still insufficient reliable data to estimate the median length at maturity ... unreliable, as indicated by comparison with lab staging, and the presence of very large skates scored as ... not cover the maturation range adequately, so using them instead of the observer estimates is not ...
Meeting Document : WG-FSA-10/27 : Author(s): M.P. Francis (New Zealand)
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Seabird mortality from longline fisheries: evidence from Marion and Gough Islands
have been found dead ashore on either island as a result of fishing gear. Recoveries of banded birds at ... Diomedea exulans nests at Marion Island in the 1990s. No hooks have been found at Gough Island and no birds ... sea suggest Wandering Albatrosses are more at risk to being hooked than are giant petrels Macronectes ...
Meeting Document : WG-IMALF-94/18 : Author(s): J. Cooper (South Africa)
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CCAMLR Bioregionalisation Workshop (Brussels, Belgium 13 to 17 August 2007) Update of benthic bioregionalisation of the Southern Ocean
the process and results of the primary benthic regionalisation completed at the Workshop and ... incorporated at the Workshop. The process and results of evaluating the physical regionalisation with ... Abstract: At the CCAMLR Bioregionalisation Workshop, 13-17 August 2007, it was agreed that ... physical variables could be used to produce primary physical regionalisations of the Southern Ocean and ...
Meeting Document : SC-CAMLR-XXVI/BG/28 : Author(s): Co-conveners, CCAMLR Bioregionalisation Workshop
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Assessment of toothfish in Subarea 48.3, 2006
Abstract: 1. As requested by SAM-2006, we provide a reference assessment for toothfish in Subarea ... , as requested by the Joint Assessment Group. 2. Also as requested by SAM-2006, we provide a review of CPUE ... 1. As requested by SAM-2006, we provide a reference assessment for toothfish in Subarea 48.3. We ... additionally provide a sensitivity run which examines uncertainty in IUU catches from 1995, as requested ...
Meeting Document : WG-FSA-06/53 : Author(s): D.J. Agnew, R. Hillary, M. Belchier, J. Clark and J. Pearce (United Kingdom)
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On the problem of icefish (Champsocephalus gunnari) vertical migration on the South Georgia shelf
the maximum catches were available at the middle of the light hours of the day. At twilight the fish ... Abstract: The results are presented of studying icefish vertical migration based on the data of R ... /V cruises during the seasons of 1982-83, 1983-84 and 1986-87, when this species was highly abundant ... on the South Georgia shelf. It is revealed that at day time the fish distributes near the bottom and ...
Meeting Document : WG-FSA-91/06 : Author(s): J.A. Frolkina and V.I. Shlibanov (USSR)
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Tooth growth in male Antarctic fur seals (Arctocephalus gazella) from South Georgia: an indicator of long-term growth history
died of natural causes at Bird Island. South Georgia, was quantified from measurements of annual layers ... in longitudinal sections of teeth. Mean age at death was 7∙69 ± 0∙07 years and this showed a small ... ) and increased with age at death. Changes in the growth pattern of teeth suggested that fur seals which ... Abstract: Growth of upper canine teeth of male Antarctic fur seals (Arctocephalus gazella) which ...
Meeting Document : WG-CEMP-93/11 : Author(s): I.L. Boyd and J.P. Roberts (United Kingdom)
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Abundance and trends in the breeding population of Adélie penguins (Pygoscelis adeliae) in the western Ross Sea
in the number of Adélie penguin breeding pairs at colonies in the western Ross Sea. High angle ... , 2001-2010. In contrast, a single declining trend line best represented the number of breeding pairs at ... of change versus loge-transformed colony size all showed a significant negative correlation at lag 1 ... Ecosystem Monitoring Program (CEMP) to detect effects of anthropogenic activities (e.g. commercial fishing ...
Meeting Document : WG-EMM-13/30 : Author(s): P. O’B. Lyver, M. Barron, K.J. Barton, S. Gordon (New Zealand), D. Ainley, A. Pollard (USA), P.R. Wilson and M.H. Pinkerton (New Zealand)