Search results
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Integrated weight longlines with paired streamer lines – best management practice for demersal longline fisheries: preliminary results
Abstract: Minimizing the time gear is available to seabirds by increasing the sink rate of ... demonstrated that IW longlines reduce risk to seabirds by minimizing the distance astern that birds have access ... the sink rate varies dramatically by vessel. Through independent tests, we determined that IW breaking ...
Meeting Document : WG-FSA-06/52 : Author(s): K. Dietrich, E. Melvin and L. Conquest (USA)
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TEMPORAL CLARIFICATION OF THE TRANSITION FROM BLUE PHASE FINGERLING TO EARLY JUVENILE BROWN PHASE IN NOTOTHENIA ROSSII FROM THE SOUTH SHETLAND ISLANDS
was composed by blue phase fingerlings of 7-7.6 cm (TL) and age group 0 year and demersal young brown ... constitute the rings, are illustrated/supported by photographs. A von Bertalanffy growth curve was computed ... by combining age/length data of the juvenile phase of N. rossii from this and a previous study at ...
Meeting Document : WG-FSA-09/32 : Author(s): E. Barrera-Oro, E. Moreira, N. Alescio and E. Marschoff (Argentina)
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Further calculations of the effects of krill fishing on predators
Abstract: Earlier initial modelling attempts by the authors are extended to consider the ... achieved by making the survival rates depend instead on krill "availability", where there is a ... provided by WG-CEMP members for the blackbrowed albatross and Antarctic fur seal. Attempts are made to ...
Meeting Document : WG-Krill-94/24 : Author(s): D.S. Butterworth and R.B. Thomson (South Africa)
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Population change in gentoo penguins Pygoscelis papua at South Georgia: potential roles of adult survival, recruitment and deferred breeding
variations introduced by good and bad years (as classified on the basis of breeding success). There is ... major population changes (large decreases followed by substantial increases) occurred. Three of these ... immigration. Gentoo penguin population dynamics are disproportionately effected by the consequences of ...
Meeting Document : WG-CEMP-93/08 : Author(s): J.P. Croxall and P. Rothery (United Kingdom)
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Estimates of global krill abundance based on recent acoustic density measurements and their implications for the calculation of precautionary catch limits and the designation of management areas
differences between our estimates and others can be explained by a number of factors such as: an ... population, and the overestimation of the demand for krill by predators. Even if these low global krill ... the old target strength which has effectively underestimated the krill biomass by a factor of three so ...
Meeting Document : WG-EMM-99/22 : Author(s): S. Nicol, A. Constable and T. Pauly (Australia)
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KRILL FISHERY BEHAVIOUR IN THE SOUTHWEST ATLANTIC
Abstract: 10 years worth of recent finescale haul-by haul krill data were used to characterize ... . However, this pattern only holds for operations by Japan. Preferred level of catch by Japan derived ...
Meeting Document : WG-EMM-08/39 : Author(s): S. Kawaguchi (Australia)
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Dietary segregation of krill-eating South Georgia seabirds
period in 1986. For five species, Antarctic krill Euphausia superba was the main food (39-98% by mass ... ranges. selectivity by predators, or differences in escape responses of krill. For the krill-eating ... , ecological segregation between krill-eating species appears to be maintained chiefly by differences in ...
Meeting Document : WG-EMM-97/15 : Author(s): Prince, P.A., Croxall, J.P., Reid, K.
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Krill biomass and distribution in Subarea 48.2 during summer 1996
characterized by relatively high accurancy (CV = 4.1 %). However, this estimate is likely to be biased towards ... underestimation which is explained by systematic error caused by krill abundance underestimation during night ...
Meeting Document : WG-EMM-97/49 : Author(s): Kasatkina, S.M., Abramov, A.M., Polischuk, M.I., Sushin, V.A.
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An assessment of the impact of krill fishery on penguins in the South Shetlands
information on fishery, penguins and krill biomass. The catch is very low in December followed by roughly ... intensity to the shelf and slope of Livingston or Elephant Island. In contrast, the food consumption by ... -20 day), the present catch rate (≤10 x103t/10-day) is smaller by one or more orders of magnitude ...
Meeting Document : WG-KRILL-93/07 : Author(s): T. Ichii, M. Naganobu and T. Ogishima (Japan)
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Distribution and population structure of Dissostichus eleginoides and D. mawsoni on BANZARE Bank (CCAMLR Division 58.4.3b), Indian Ocean, Antarctic
biological data sampled by a Japanese commercial fishing vessel during austral summer from 2006/07 to 2008/09 ... mainly caught in the deeper slope >1500 m. The separation of the two species by depths may be related ... to the physical intolerance to the cooler temperature by the lack of antifreeze for the former ...
Meeting Document : WG-FSA-10/47 : Author(s): K. Taki, M. Kiyota, T. Ichii and T. Iwami (Japan)