Resultados de la búsqueda
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Foraging movements of the shy albatross Diomedea cauta breeding in Australia; implications for interactions with longline fisheries
to decrease as eggs approached hatching. Adults which were tracked near the end of the breeding ... Abstract: Satellite telemetry was used to identify the foraging zones of Shy Albatrosses Diomedea ... Branca to the south) to assess their level of interaction with longline fisheries. Adult birds from both ... colonies fed locally both in and outside the breeding season. Breeding birds from Albatross Island foraged ...
Meeting Document : WG-FSA-98/33 : Autor(es): N. Brothers, R. Gales, A. Hedd and G. Robertson (Australia)
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Foraging movements of the shy albatross Diomedea cauta breeding in Australia; implications for interactions with longline fisheries
to decrease as eggs approached hatching Adults which were tracked near the end of the breeding season ... Abstract: Satellite telemetry was used to identify the foraging zones of Shy Albatrosses Diomedca ... Branca to the south) to assess their level of interaction with longline fisheries. Adult birds from both ... colonies fed locally both in and outside the breeding season. Breeding birds from Albatross Island foraged ...
Meeting Document : WG-FSA-97/52 : Autor(es): Gales, R., Hedd, A., Brothers, N., Robertson, G.
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Changes in biomass of eight species of finfish around the South Orkney Islands (Subarea 48.2) from three bottom trawl surveys
Paper Title: Changes in biomass of eight species of finfish around the South Orkney Islands ... the South Orkney Islands (Subarea 48.2) suffered substantial declines from split-year 1977/78 to 1989 ... /90. The biomass of several species of finfish has been monitored through scientific bottom trawl ... surveys within the 500 m isobath of the South Orkney Islands, most recently by the Federal Republic of ... second most skewed (after L. squamifuons), based on the variability of catch on a haul-by-haul basis ... . However, one should bear in mind that the 1985 survey was conducted only a few years after a substantial ... after the closure of the area for finfishing and about 10 years after the peak of commercial fishing ... potentially the result of low effort directed at finfish in the region after 1982/83 and the final closure ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 53–74 : Autor(es): Jones, C.D., K.-H. Kock and E. Balguerías
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Revised assessment models for Patagonian toothfish in research block 58.4.3a_1 of Division 58.4.3a, Elan Bank for the years 2005–2014
CCAMLR risk 2 values at 13 tonnes and above for the shallow fishery exceed 50% toward the end of 35 year ... 300 m) CASAL models for stock status assessments of Dissostichus eleginoides in the research block ... 58.4.3a_1 following the recommendations of the last WG-SAM meeting. Total of four runs were carried out ... . Among them three runs were carried out using the latest information on age-length relationship in this ...
Meeting Document : WG-FSA-15/22 : Autor(es): K. Taki (Japan), S. Mormede (New Zealand) and T. Ichii (Japan)
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REVISED AGE AND GROWTH ESTIMATES FOR ANTARCTIC STARRY SKATE, AMBLYRAJA GEORGIANA, FROM THE ROSS SEA
Abstract: A previous study on the age and growth of Amblyraja georgiana in the Ross Sea suggested ... that these skates initially grow very rapidly for about five years, after which growth almost ceases ... that is radically different from the published interpretation. By counting fine growth bands in the ... –37 years compared with 14 years). Several pieces of circumstantial evidence support the new ...
Meeting Document : WG-FSA-08/21 : Autor(es): M.P. Francis (New Zealand) and M.J. Gallagher (Ireland)
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Feasibility of lead-radium dating the otoliths of blackfin icefish (Chaenocephalus aceratus) and ocellated icefish (Chionodraco rastrospinosus)
arbitrary target core weight of 0.01 g, near the low end of the range used in this study. It is recommended ... otoliths from these fishes were small and the number of otoliths available low, a whole otolith application ... was necessary as a first look at lead-radium levels. The application was successful as a first step in ... determining the parameters of future applications that would lead to a validation of age. In the current study ...
Meeting Document : WG-FSA-10/17 : Autor(es): A.H. Andrews, M. La Mesa and J. Ashford (USA)
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Estimating the impact of depredation by killer whales and sperm whales on longline fishing for toothfish (Dissostichus eleginoides) around South Georgia
becoming fewer towards the end of the season in August. Killer whale interactions appear to be more ... the levels of depredation caused by killer whales (Orcinus orca) and sperm whales (Physeter ... sizes normally of 4 to 10 animals, and often appear to actively seek out fishing vessels and ‘strip’ the ... . Most interactions from sperm whales occur during May at the start of the season with the sightings ...
Meeting Document : WG-FSA-10/P06 : Autor(es): J. Moir Clark and D.J. Agnew
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A SIMULATION STUDY TO DETERMINE THE RELATIONSHIP BETWEEN SAMPLING INTENSITY AND PRECISION WHEN ESTIMATING AVAILABILITY FUNCTIONS FOR BREEDING ADÉLIE PENGUIN COLONIES
significant loss of information content. To this end, a simulation study was undertaken to examine how the ... STUDY TO DETERMINE THE RELATIONSHIP BETWEEN SAMPLING INTENSITY AND PRECISION WHEN ESTIMATING ...
Meeting Document : WG-EMM-11/12 : Autor(es): J. McKinlay and C. Southwell (Australia)
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RECENT TRENDS IN NUMBERS OF FOUR SPECIES OF PENGUINS AT THE PRINCE EDWARD ISLANDS
in numbers of king penguin chicks that survived to the end of the winter period, but there was ... pairs of king penguins were incubating eggs at Marion Island, the larger of the two islands in the group ... considerable fluctuation in chick production in the 1990s. It was roughly estimated that on average 88% of king ... penguin chicks survived the winter period (from April to September/October). Numbers of gentoo penguins at ...
Meeting Document : WG-EMM-10/P1 : Autor(es): R.J.M. Crawford, P.A. Whittington, L. Upfold, P.G. Ryan, S.L. Petersen, B.M. Dyer and J. Cooper
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Evaluating the impact of multi-year research catch limits on overfished toothfish populations
Paper Title: Evaluating the impact of multi-year research catch limits on overfished toothfish ... populations Abstract / Description: In stocks that have been depleted by overfishing, the benefit of ... additional fisheries removals for research purposes needs to be evaluated against the risk that such catches ... may contribute to delaying or preventing the recovery of such stocks. Through simulating a Patagonian ... the end of the projection period to the median un- fished spawning stock biomass, SSB0) of 1.0 over a ... %, 25%, 30% and 35% of SSB0 at the end of the 5-year period. The annual catches taken in each scenario ... , starting in the year immediately after historical overfishing had ceased. Table 2: Input parameters for ... that results in a greater than 50% chance after 20 years that the stock has recovered to 95% of the ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 47–55 : Autor(es): Welsford, D.C