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Tooth growth in male Antarctic fur seals (Arctocephalus gazella) from South Georgia: an indicator of long-term growth history
provided an indication of body growth, Tooth growth rate was lowest in seals which died early (age 4 years ... became sexually mature early also died early. Tooth growth layers deposited in each calendar year were ... 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 ...
Meeting Document : WG-CEMP-93/11 : Автор(ы): I.L. Boyd and J.P. Roberts (United Kingdom)
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Foraging energetics of Antarctic fur seals in relation to changes in prey availability
normal years only 5% of their time at sea is spent resting. This contrasts with northern fur seals ... account for the observed between-year difference in at-sea FMR of C. ursinus while foraging-trip duration ... lactating female Antarctic fur seals, Arctocephalus gazella, foraging at sea was measured in two years using ... doubly labeled water at South Georgia Island. There was no difference between years in mass gain, water ...
Meeting Document : SC-CAMLR-VIII/BG/13 : Автор(ы): Delegation of United Kingdom
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Interactions between cetaceans and fisheries in Southern Ocean
Southern Ocean in the second half of the 1980’s, interactions of cetaceans with these fisheries became ... . Sperm whales became frequently entangled in the line and part of the line was lost in a number of cases ... only occasionally and one whale (presumably a minke whale) died. Author(s): K.-H. Kock (Germany), M ...
Meeting Document : WG-FSA-05/11 : Автор(ы): K.-H. Kock (Germany), M. Purves (South Africa) and G. Duhamel (France)
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Has krill fishing the potential to adversely affect recruitment in Antarctic notothenioid fishes?
Abstract: A few years after krill (Euphausia superba) fishing had started in 1972/73, it became ... known that early life stages of Antarctic fish are associated with krill aggregations and are subject to ... 25 years later WG-FSA is still not in the position to estimate the amount of fish by-catch reliably ...
Meeting Document : WG-FSA-14/66 : Автор(ы): K.-H. Kock (Germany) and C.D. Jones (USA)
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MULTIPLE TIME SCALES OF VARIABILITY IN THE KRILL POPULATION AT SOUTH GEORGIA
conducted in the early, middle and late period of the summers of 2001 to 2005, together with krill ... abundance was highest during the middle of the summer in 3 years and in the late period in 2 years; in the ... population size structure over the same period from predator diet data, were used with a krill population ... latter there was evidence that krill recruitment was delayed by several months. A model scenario with ...
Meeting Document : WG-EMM-08/48 : Автор(ы): K. Reid, J. Watkins, E. Murphy, P. Trathan, S. Fielding and P. Enderlein (United Kingdom)
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Krill population dynamics at South Georgia: implications for ecosystem-based fisheries management
biomass. Krill abundance was highest during the middle of the summer in 3 years and in the late period in ... from surveys conducted in the early, middle and late period of the summers of 2001 to 2005, together ... recruitment in each year showed the greatest correlation with the acoustic series. The results are consistent ... with krill population size structure over the same period from predator diet data, were used with a ...
Meeting Document : WG-EMM-10/P08 : Автор(ы): K. Reid, J.L. Watkins, E.J. Murphy, P.N. Trathan, S. Fielding and P. Enderlein
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Fishing and conservation in southern waters
Abstract: Fishing in the Southern Ocean commenced on finfish in 1969/70 and on krill in 1972/73 ... . Up to 1992/93, more than 3 million tonnes of finfish had been harvested, mainly around South Georgia ... and the Kerguelen Islands. After 15 years of exploitation, most fish stocks have been heavily depleted ... operations and the entanglement of seals in fragments of discarded or lost fishing gear. Most fish stocks had ...
Meeting Document : SC-CAMLR-XII/BG/11 : Автор(ы): Delegation of Germany
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Length-age composition of icefish (Champsocephalus gunnari, perciformes, notothenioidei, Channichthyidae) from different locations of South Georgia Island subarea
Ch.gunnari length-age composition structure at early years of life for fish inhabiting areas to the south of ... -3 years had been migrating towards the Shag Rocks. It has been found that predomination of ... Eastern, Northern, Western, Southern Island Shelf and near Shag Rocks allowed for revealing similarity of ... Island and near Shag Rocks and finding a difference between those two groups and the eastern group ...
Meeting Document : WG-FSA-00/32 : Автор(ы): Zh.A. Frolkina (Russia)
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Estimates of the tag loss rates for single and double tagged toothfish (Dissostichus mawsoni) fishery in the Ross Sea
tagged fish having at least one tag remaining after one year at liberty; 98.9% after two years at liberty ... Abstract: The rate at which tags are lost from tagged toothfish is an important parameter in ... individual tags are lost from tagged toothfish in Subareas 88.1 and 88.2 from a sample of 969 double tagged ... ) of individual tags were lost almost immediately, and then there was an ongoing rate of about 0.039 ...
Meeting Document : WG-SAM-11/18 : Автор(ы): A. Dunn, M.H. Smith (New Zealand), D.J. Agnew (UK) and S. Mormede (New Zealand)
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Demography of Antarctic krill in the Elephant Island area (Antarctic Peninsula) during austral summer 2001
during the past years (between 198 and 230 krill 1000 m-3, i.e. between 40 and 46 m-2 or 11.3 g m-2). The ... absolute index was RI1 = 131.4 * 1000 m-3, which is among the highest values for the past 20 years. The ... high krill abundance and the high recruitment index reflect the end of a succession of years with poor ... for a successful spawning season, was G = 0.99, indicating an early initiation of the spawning season ...
Meeting Document : WG-EMM-01/10 : Автор(ы): V. Siegel (Germany), B. Bergström (Sweden), U. Mühlenhardt-Siegel (Germany) and M. Thomasson (Sweden)
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