Resultados de la búsqueda
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Diet and foraging effort of Adélie penguins in relation to pack-ice conditions in the southern Ross Sea
years when pack ice was sparse. Foraging trip duration differed by colony, season and year and was ... was the most important prey, especially during years or periods within years when little pack ice was ... colony, seasons and year. Diet differed among colonies only slightly. The fish Pleuragramma antarcticum ... were consumed predominantly in a year of heavy pack-ice cover; more adult krill were consumed in two ...
Meeting Document : WG-EMM-98/15 : Autor(es): D.G. Ainley (USA), P.R. Wilson, K.J. Barton (New Zealand), G. Ballard, N. Nur (USA) and B. Karl (New Zealand)
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PROPUESTA PARA REALIZAR UNA PROSPECCIÓN PATROCINADA POR LA CCRVMA CON EL FIN DE EFECTUAR UN SEGUIMIENTO DE LA ABUNDANCIA DE PRE-RECLUTAS DE LA AUSTROMERLUZA ANTÁRTICA EN EL SUR DEL MAR DE ROSS
years in Subarea 88.1 and for nine years in Subarea 88.2. The research and assessment work in these ... locations in different years, making it impossible to develop a consistent time series that would monitor ...
Meeting Document : SC-CAMLR-XXX/07 : Autor(es): Delegation of New Zealand
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Temporal scales of foraging in a marine predator: implications for interpreting the distribution of prey
km) represented by short (5 rain) travel durations. In a study lasting 5 years, the distributions of ... travel durations between bouts of feeding changed between years. These changes suggested either that the ... structure and/or the spatial distribution of krill swarms varied between years. The behavior of fur seals ... prey patches at the meso-scale level. Only in one year of the study (1990/91) were there indications ...
Meeting Document : WG-EMM-95/23 : Autor(es): Boyd, I.L.
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Demographic studies of Antarctic krill Euphausia superba Dana in the Cooperation and Cosmonaut Seas (Indian sector of the Southern Ocean)
years in the Cooperation Sea. Assuming growth for only 180 days per year, growth rates ranged from 0.120 ... mortality rates. The duration of the life cycle of E.superba exceeded 5 years in the Cosmonaut Sea and 6 ... years of life. Based on long-term observations, the relationship between E.superba age composition and ... -0.133 mm.d-1, during the first year of life, to 0.019-0.022 mm.d-1 during the fifth year. Von ...
Meeting Document : WG-Krill-94/16 : Autor(es): E.A. Pakhomov (Ukraine)
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Determination of a statistically based survey area suitable for hydroacoustic stock assessment of Euphausia superba in the Elephant Island, King George Island, Bransfield Strait area
be shown to exhibit high standing stock (greater than 2 million tons) years, moderate standing stock ... (approximately 1 million tons) years, and low standing stock (less than 1/2 million ton) years. The size of the ... -series of data from 1981, 1984 and 1978-1989 permitted resolution of inter-year differences in standing ... relatively uniform from year to year. Using only sub-area biomass leads to an ambiguous interpretation of the ...
Meeting Document : SC-CAMLR-VIII/BG/32 : Autor(es): Delegation of USA
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Diet variability and reproductive performance of macaroni penguins (Eudyptes chrysolophus) at Bird Island, South Georgia
(Euphausia superba) was the main prey in 17 out of 22 years. Amphipods (Themisto gaudichaudii) were the main ... gross energy content of individual meals was often above average in years when the diets contained fewer ... euphausiids, but fledging mass was always below average in these years. Although macaroni penguins are able to ... . frigida) in 2000. There was no clearly dominant prey group in 1999. The five-year average proportion of E ...
Meeting Document : WG-EMM-12/17 : Autor(es): C.M. Waluda, S.L. Hill, H.J. Peat and P.N. Trathan (United Kingdom)
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Analysis of krill fishery operations in Subarea 48.1: spatial-time distribution of CPUE and fishing efforts
Abstract: In previous years we revealed that period 2006-2011 is characterized by the highest ... values of standardized CPUE indices in the Subarea 48.1 for the last 25 years. We continue to investigate ... methods. Our investigation shows how fishery operated by years and month in each SSMUs with special ...
Meeting Document : WG-EMM-14/21 : Autor(es): S. Kasatkina and P. Gasyukov (Russia)
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Spatio–temporal dynamics of Antarctic krill fishery: identification of fishing hotspots
FHs. Results indicate that the fishery is presenting consistent FH across years, particularly during ... those years when the precautionary catch limit is reached. These events occur mainly in the centre of ... (>10 ton∙km-2) during years when the catch limit is reached. The analysis show that the krill ... fishing fleet is concurring to know fishing grounds year after year, where they obtain high catches, and ...
Meeting Document : WG-EMM-16/52 : Autor(es): F. Santa Cruz, B. Ernst and J.A. Arata
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Inter-annual variation in condition index of the mackerel icefish Champsocephalus gunnari
the region. Years when krill were scarce and condition index was consequently low, were consistent ... with years when indices from land-based krill predators also indicated krill were scarce. Author(s ...
Meeting Document : WG-EMM-96/43 : Autor(es): Parkes, G., Everson, I., Kock, K.-H.
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Preliminary model of krill fishery behaviour in Subarea 48.1
Elephant Islands in alternate years would result in an average yearly catch similar to that at present ... during alternate years. File: 06agnew-marin.pdf ... Livingston and Elephant Islands in alternate years would result in an average yearly catch similar to that ... land-based predators during alternate years. Resume Description d'un modele simple du comportement ... 48.1). Although only about 20% of the South Atlantic catch has been taken in Subarea 48.1, the catch ... periods (months were assumed to be 30 days long). Data from the Chilean fishery in Subarea 48.1 were ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 71–79 : Autor(es): Agnew, D.J. and V.H. Marín