Search results
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Upward adjustments to local catch limits for the krill fishery in Subarea 48.1
on 1) a “stoplight” classification of predator performance to identify years when predator performance is good ... , 2) repeat acoustic surveys to identify years when local krill biomass increases during the fishing season ... opinion, and suggests that indices of foraging trip duration, fledge weight, and reproductive success ... , a ratio of late to early summer krill biomass estimates can be indicative of “surplus” krill potentially ...
Meeting Document : WG-EMM-16/47 : Author(s): Antarctic Ecosystem Research Division, Southwest Fisheries Science Center and NOAA Fisheries
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Decadal trends in abundance, size and condition of Antarctic toothfish in McMurdo Sound, Antarctica, 1972–2011
Abstract: We report the analyses of a dataset spanning 39 years of near-annual fishing ... for Dissostichus mawsoni in McMurdo Sound, Antarctica, 1972–2011. Data on total length, condition and catch per ... for the Ross Sea shelf. Fish length and condition increased from the early 1970s to the early 1990s ... and then decreased. Fish length positively correlated with Ross Sea ice extent in early spring, a relationship ...
Meeting Document : WG-FSA-12/P04 : Author(s): D.G Ainley, N. Nur, J.T Eastman, G. Ballard, C.L Parkinson, C.W Evans and A.L. DeVries
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Entanglement of Antarctic fur seals Arctocephalus gazella in man made debris at Signy Island, South Orkney Islands 1999/2000
seals wearing neck collars of man-made debris. One additional sighting was of an animal that had been ... previously entangled but had lost its collar by the time of observation. All of the animals involved were ... juvenile males, the main component of the population at this time of year.The number of sightings ... (by 42%) since 1998/99. Over the past four years, fluctuations in the incidence of entanglement between ...
Meeting Document : SC-CAMLR-XIX/BG/03 : Author(s): Delegation of the United Kingdom
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Peak mortality of krill, fished with midwater trawls and feasible criteria of krill trawls ecological safety
and died during fishery. The equations are presented to estimate the gross removal of an object ... is offered, which is the ratio of the amount of the objects caught and objects caught and died during fishery ...
Meeting Document : WG-KRILL-93/34 : Author(s): Yu. V. Kadilnikov (Russia)
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Preliminary assessment of the South Georgia toothfish stock, 2007
). Fits of all data (CPUE; catches at length for the early fishery; catches at age for the later fishery ... of all data (CPUE; catches at length for the early fishery; catches at age for the later fishery; tag ... higher than was estimated last year. 2. Improvements are made to the fit of tag data through ... retardation than larger fish, and that on average it is 1 year or more. 3. A new model is developed which uses ...
Meeting Document : WG-FSA-07/29 : Author(s): D.J. Agnew, R. Hillary and J. Pearce (United Kingdom)
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The diet of Antarctic fur seals Arctocephalus gazella during the breeding season at South Georgia
% were taken between early February and the middle of March. Champsocephalus gunnari and Lepidonotothen ... % were taken between early February and the middle of March. Champsocephalus gunnari and Lepidonotothen ... studies; the pattern of fish consumption showed a consistent seasonal pattern in three of the four years ... the entire pup-rearing periods of several years. Author(s): Arnould, J.P.Y., Reid, K. Title: The diet ...
Meeting Document : WG-EMM-95/28 : Author(s): Arnould, J.P.Y., Reid, K.
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By-catch of rays in the 2002/03 toothfish fishery around South Georgia
of rays that were likely to have died as a result of being caught on longlines using a combination ... to have died as a result of being caught on longlines using a combination of the observer tally ...
Meeting Document : WG-FSA-03/58 : Author(s): D.J. Agnew, J. Pearce and M. Endicott (United Kingdom)
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Updated models of the habitat use of Patagonian toothfish (Dissostichus eleginoides) on the Kerguelen Plateau around Heard Island and the McDonald Islands (Division 58.5.2)
and sex composition, when controlling for gear selectivity, year and sex effects. Fish length increased ... fish inhabit deeper waters (>1500m) especially on the eastern part of the Plateau, where ... in the HIMI part of the Kerguelen Plateau. The distribution and ecology of the early life history stages, up ... to 2-3 years old, and the implications of sexual and phenotypic variability in growth and movement stand out ...
Meeting Document : WG-FSA-14/42 : Author(s): C. Péron and D.C. Welsford (Australia)
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Distribution and some biological features of icefish (Champsocephalus gunnari) at different life cycle stages in the South Georgia subarea
Abstract: The results of icefish ecology were summarized for the period of above 20 years ... that the life mode changed from pelagic one occurring at early life stages, to near-bottom- pelagic one after 20 ... to coastal areas in the northern and north-eastern part and to the open shelf areas in the southeast, while ... The results of icefish ecology were summarized for the period of above 20 years of South Georgia ...
Meeting Document : WG-FSA-99/65 : Author(s): Zh.A. Frolkina (Russia)
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Diet and foraging effort of Adélie penguins in relation to pack-ice conditions in the southern Ross Sea
was sparse. Foraging trip duration differed by colony, season and year and was related directly to distance ... of the food gathered by parents was used for self maintenance; on longest trips, parents lost body mass ... was sparse. Foraging trip duration differed by colony, season and year and was related directly to distance ... of the food gathered by parents was used for self maintenance; on longest trips, parents lost body mass ...
Meeting Document : WG-EMM-98/15 : Author(s): D.G. Ainley (USA), P.R. Wilson, K.J. Barton (New Zealand), G. Ballard, N. Nur (USA) and B. Karl (New Zealand)