Resultados de la búsqueda
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A summary of the commercial fishery for mackerel icefish Champsocephalus gunnari in Subarea 48.3 during the 1997/98 season
days between 25 December 1997 and 5 January 1998. The total catch of C. gunnari was 5.04 tonnes in 34 ... hauls. 67% of this catch was taken in just two hauls, confirming the patchy distribution of this species ... briefed before the short trip to South Georgia. It is unclear whether the poor catches by the FV Betanzos ... for mackerel icefish Champsocephalus gunnari in Subarea 48.3 during the 1997/98 season Approval ...
Meeting Document : WG-FSA-98/53 : Autor(es): G. Parkes, A. King and C. Jones (United Kingdom)
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Poor breeding success of the Adélie penguin at Béchervaise Island in the 1998/99 season
Island during 1998-99, a season of high chick mortality. One thousand nests perished in the three weeks ... nests compared to previous "good" seasons in which between 1200 and 1800 chicks crèched on the ... island. Evidence from analyses of foraging location, foraging trip duration and diet led to the ... adult birds spending longer at sea foraging than in normal years. In most previous seasons birds have ...
Meeting Document : WG-EMM-99/25 : Autor(es): L. Irvine, J.R. Clarke and K.R. Kerry (Australia)
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Conditions for the precise measurement of fish target strength in situ
obtained from one large same fish school in the eastern shelf of Bering sea during the intership ... Abstract: Conditions for precise measurement of in situ fish target strength (TS) are empirically ... studied and two indexes are introduced for this purpose. One is the number of fish in the effective ... calibration between Japanese and U.S. vessels on 15 and 16 August 1991. Published in J.Mar.Acoust.Soc. Author ...
Meeting Document : WG-Krill-94/35 : Autor(es): K. Sawada and M. Furusawa (Japan), N.J. Williamson (USA)
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Counts of surface-nesting seabirds at Marion Island in 2003/04
, eastern rockhopper penguins E. chrysocome filholi and Crozet shags Phalacrocorax [atriceps] melanogenis ... continued to decrease at Marion Island in 2003/04. The decreases are thought to be due to a reduced ... appear stable at the island, but often with large fluctuations in numbers breeding. Numbers of dark ... have shown a long-term decrease, although the count for dark-mantled sooty albatrosses was higher in ...
Meeting Document : WG-EMM-04/29 : Autor(es): R.J.M Crawford, N. de Bruyn, B.M. Dyer, B. Hanise, N.T.W. Klages, P.G. Ryan, L.G. Underhill and L. Upfold (South Africa)
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Foraging response of Antarctic fur seals to changes in the marine environment
fish and squid in the diet. Foraging trip duration, ashore duration and dive frequency increased ... 1964 d at sea. The frequencies of krill, fish and squid in the diet were estimated from prey items ... contained in scats. In 1996, a year of high krill abundance, females made shorter foraging trips, fewer ... dives and spent more time ashore than in 1994 when krill was scarce. Females fed exclusively on krill in ...
Meeting Document : WG-EMM-99/35 : Autor(es): D.J. McCafferty, I.L. Boyd, T.R. Walker and R.I. Taylor (United Kingdom)
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TARGET STRENGTH STUDIES ON ANTARCTIC SILVERFISH (PLEURAGRAMMA ANTARCTICUM) IN THE ROSS SEA
) theoretical, 2) ex situ measures on dead or living fish under experimental conditions, 3) in situ measures on ... free swimming fish in their natural habitat. A canvassing of the literature suggested that the type of ... be several dB higher than in situ (Nakken and Olsen, 1977). On other hand the many factors likely to ... influence TS measurements in situ (swimming movements and aspect, day-night behaviour, physiological state ...
Meeting Document : SG-ASAM-09/10 : Autor(es): M. Azzali, I. Leonori, I. Biagiotti, A. De Felice, M. Angiolillo, M. Bottaro and M. Vacchi (Italy)
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Milk consumption and growth efficiency in Antarctic fur seal (Arctocephalus gazella) pups
consumption was determined on 388 occasions in 177 pups. Mean estimates of milk consumption ranged from 2.5 to ... 2-day maternal attendance periods (feeding bouts). There were no differences in milk consumption ... between the sexes in any year. Both per-bout and per-day milk consumption increased steadily with age ... before decreasing significantly in the last 30-40 days of lactation. Per-bout milk consumption was ...
Meeting Document : WG-EMM-97/11 : Autor(es): Socha, D.G., Arnould, J.P.Y., Boyd, I.L.
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Comparisons in prey distribution between inshore and offshore foraging areas of chinstrap penguins and Antarctic fur seals at Seal Island
foraging trip such as Antarctic fur seals (Arctocephalus gazella) and overnight foraging chinstrap penguins ... (Pygoscelis antarctica) went beyond the inshore region and foraged in the slope/offshore region, even though ... the inshore region. Only diurnal chinstrap penguins foraged in the inshore region. The following ... advantages are considered for visual predators to feed in the slope/offshore region at night:(l) krill showed ...
Meeting Document : WG-EMM-96/49 : Autor(es): Ichii, T., Bengtson, J.L., Boveng, P., Cameron, M.F., Naganobu, M., Meyer, W.R., Hiruki, L.M., Takao, T., Jansen, J.K., Kawaguchi, S.
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Atlas of top predators from French Southern Territories in the Southern Indian Ocean
. Indeed, seabirds and seals are considered as good indicators of changes in ecosystems at differential ... Atlas of top predators from the French Southern Territories in the Southern Indian Ocean is a summary of ... penguin, Adelie penguin, eastern rockhopper penguin, northern rockhopper penguin, macaroni penguin ... identifying important areas in the southern Indian Ocean. The determination of zones of high species richness ...
Meeting Document : WG-EMM-16/42 : Autor(es): K. Delord, C. Barbraud, C.-A. Bost, Y. Cherel,C. Guinet and H. Weimerskirch
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DISTRIBUTION AND BIOLOGY ON ANTARCTIC KING CRAB PARALOMIS FORMOSA CAUGHT AS BYCATCH IN FISHERY FOR TOOTHFISH (DISSOSTICHUS ELEGINOIDES) ON PATAGONIAN CONTINENTAL SLOPE
Abstract: Scientific observation was conducted in the commercial trip on the long-liner " ... ;Simeiz", operating under the Ukrainian flag, in the south-western Atlantic Ocean outside the ... exclusive (marine) economic zones of the foreign states (FAO statistical area 41) in the period from ... , accordingly. Sex ratio was 1:1 in the period from April till May, and 2:1 in the period from June till ...
Meeting Document : WG-FSA-09/30 : Autor(es): Yu.V. Korzun (Ukraine)