Search results
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United States seabird research undertaken as part of the CCAMLR Ecosystem Monitoring Program, 1987–1988
Abstract: As part of the NMFS/AMLR program to provide information for the effective management of ... Antarctica’s marine living resources, three permanent monitoring sites were established on the western side of ... on the breeding success, fledging weights, growth rates and diets of Chinstrap and Adelie Penguins ... were obtained. Although it is too early to draw conclusions on any aspects of the data, this report ...
Meeting Document : SC-CAMLR-VII/BG/17 : Author(s): United States of America
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Competition-mediated prey availability drives Adélie penguin (Pygocelis adeliae) chick size, mass and condition at colonies of differing size in the southern Ross Sea
Abstract: Understanding the relative effects of biotic and abiotic drivers of survival, and the ... populations. Body size, mass and condition may be important determinants of an organism’s ability to survive ... periods of low resource availiability or high metabolic demand. Such effects may be particularly ... important for naïve juveniles when they first become independent of their parents and must learn to forage ...
Meeting Document : WG-EMM-13/31 : Author(s): A.L. Whitehead (Australia), P. O’B. Lyver (New Zealand), G. Ballard (USA), K. Barton, B.J. Karl (New Zealand), D.G. Ainley, K. Dugger, S. Jennings (USA), A. Lescroël (France) and P.R. Wilson (New Zealand)
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Dietary composition of juvenile Dissostichus eleginoides (Pisces, Nototheniidae) around Shag Rocks and South Georgia, Antarctica.
Abstract: A diet analysis of the Patagonian toothfish Dissostichus eleginoides, trawled in the ... South Georgia Islands area in March–April 1996, was carried out by frequency of occurrence (F%) and ... coefficient ‘‘Q’’ (%) methods. The samples consisted chiefly of immature specimens, with predominant length ... ranges of 30–70 cm (TL). Fish was by far the main food on the shelves of Shag Rocks and South Georgia ...
Meeting Document : WG-FSA-05/P6 : Author(s): Casaux, R., Barrera-Oro, E.R., Marschoff, E.R.
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The survivorship of rays discarded from the South Georgia longline fishery
throughout the months of May and June, during 2003 toothfish fishing season in Subarea 48.3. From these ... results we can conclude that depth has a significant influence on the mortality of skate, with a predicted ... mortality of 0% for skate caught in waters of less than 1100m. A predicted mortality of 65% for skate caught ... in waters between, 1400 to 1600m and a mortality of 100% for skate caught at 2000m. We recommend from ...
Meeting Document : WG-FSA-03/57 : Author(s): M. Endicott and D.J. Agnew (United Kingdom)
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An assessment of the mackerel icefish (Champsocephalus gunnari) off Heard Island
Abstract: Assessments of the abundance and potential yield of mackerel icefish (Champsocephalus ... gunnari) populations at Heard Island are developed from the results of four scientific surveys conducted ... in 1990, 1992, 1993 and 1997. The assessments include estimates of all the parameters required, based ... of maturity and a weight length relationship. The results show that characteristics of icefish ...
Meeting Document : WG-FSA-97/29 : Author(s): de la Mare, W.K., Constable, A., Williams, R.
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Preliminary model of krill fishery behaviour in Subarea 48.1
Abstract: A simple deterministic model is described which models the behaviour of the krill ... fishery in Subarea 48.1 and estimates the effort applied and the catch of krill in fine-scale squares ... . The distribution of catches predicted by the model, which is restricted to the months December to ... March, compare favourably with the general distribution of catches in Subarea 48.1. A number of ...
Meeting Document : WG-KRILL-93/14 : Author(s): D.J. Agnew (Secretariat)
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Some aspects of the by-catch fish spawning and oogenesis
Abstract: On the basis of the biological material collected on some by-catch fishes during ... Antarctic toothfish fishery from 2002 till 2008 in different areas of the Southern Ocean (Collaboration Sea ... , D'Urville, Ross and.mundsen Seas) it was established that spawning of C. dewitti and species X ... continental shelf at depth of 300-600 m during summer season (may be autumn for sp. X) of the southern ...
Meeting Document : WG-FSA-10/51 : Author(s): V. Prutko (Ukraine) and D. Chmilevsky (Russia)
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Preliminary analyses in support of the CEMP Review Workshop: power analyses
Abstract: A series of power (sensitivity) analyses of CEMP indices was made using the DOS-based ... change over the range –10% to +10% of a mean survey value. Each run of MONITOR involved the calculation ... of power for 3 survey scenarios and 3 alpha levels (0.05, 0.10 and 0.20). The 3 surveys scenarios ... were chosen to represent time series data from annual surveys conducted annually over periods of 5, 10 ...
Meeting Document : WG-EMM-03/26 : Author(s): Secretariat
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Discharge of offal in the Ross Sea – follow up to COMM CIRC 15/15–SC CIRC 15/06
an analysis of the information provided by New Zealand in previous years (COMM CIRC 13/09), along ... facilitate further investigation. In 2013 reports of offal were tightly clustered in a small area on the ... border of SSRUs 88.H and J, whereas in 2015 the reports were received from a broader area. For each ... 10 kilometres of the reported location during the 5 days preceding the date of the report ...
Meeting Document : CCAMLR-XXXIV/BG/10 : Author(s): CCAMLR Secretariat
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Preliminary tag-recapture based population assessment of Antarctic toothfish (Dissostichus mawsoni) in Subarea 48.4
Abstract: The biomass of Antarctic toothfish (D. mawsoni) in CCAMLR subarea 48.4 is estimated ... from tagging returns to average 1109 tonnes since 2010, with a five-year (2015-2019) average biomass of ... 1187 tonnes. Applying the CCAMLR agreed precautionary assumption of average biomass across the time ... series and harvest rate of γ = 0.038, implies a 2019/20 yield of 45 tonnes using the 5-year average ...
Meeting Document : WG-FSA-2019/27 : Author(s): T. Earl and A. Riley