Resultados de la búsqueda
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Energetics of diving in macaroni penguins
the mass-specific rate of oxygen consumption (VO2) while diving and investigation of the physiological ... adjustments that might facilitate the diving behaviour observed in this species. In common with other diving ... accounted for 36% of the variation in dive duration. When VO2 was calculated for dives of different ... durations, 95.3% of dives measured were within the calculated aerobic dive limit (cADL) for this species ...
Meeting Document : WG-EMM-03/39 : Autor(es): J.A. Green, P.J. Butler, A.J. Woakes and I.L. Boyd (United Kingdom)
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Conflict or co-existence? Foraging distribution and competition for prey between Adélie and chinstrap penguins
between the two species, however, in a year of normal resource availability (2001) there was no such ... and ecologically very similar, have very similar diet and breed sympatrically in the Scotia Arc from ... the South Sandwich Islands to the Antarctic Peninsula. To investigate how these two species co-exist ... , their foraging distribution and diet were studied during the chick-rearing period at Signy Island, South ...
Meeting Document : WG-EMM-02/15 : Autor(es): A.S. Lynnes, K. Reid, J.P. Croxall and P.N. Trathan (United Kingdom)
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Foraging energetics of Antarctic fur seals in relation to changes in prey availability
Abstract: This research examines the energy budget of breeding female Antarctic fur seals, both ... when food was plentiful and when it was scarce. The energy expenditure and change in body mass of ... doubly labeled water at South Georgia Island. There was no difference between years in mass gain, water ... 9.52 ± 0.55 W/kg (n = 22), a value that is 6.7 times the predicted basal rate but only 1.9 times the ...
Meeting Document : SC-CAMLR-VIII/BG/13 : Autor(es): Delegation of United Kingdom
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Monitoring a marine ecosystem using responses of upper trophic level predators
1977 and 1998. There was no trend in the CSI from variables representative of foraging conditions ... Abstract: 1. This study examined the changing status of the marine ecosystem at the island of ... index (CSI). 2. Sensitivity analyses showed that missing values had a large effect upon the accuracy of ... the CSI but this effect was reduced if the individual variables were highly correlated. The level of ...
Meeting Document : WG-EMM-01/25 : Autor(es): I.L. Boyd and A.W.A. Murray (United Kingdom)
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Trends in breeding numbers and survival of black-browed (Thalassarche melanophrys) and grey-headed albatrosses (T. chrysostoma) breeding on Macquarie Island
grey-headed albatrosses appear to have remained relatively stable since the mid 1970s. There was no ...
Meeting Document : WG-FSA-04/48 : Autor(es): A. Terauds, R. Gales and R. Alderman (Australia)
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Responding to climate change: Adélie penguins confront astronomical and ocean boundaries
Sea, a situation that no other Adélie penguin population has had to confront. As sea ice extent in the ... latitudes for the remainder of the year. The latitudinal range of the Adélie penguin spans ~22o. Penguins ... from northern colonies may not migrate, but due to the high latitude of Ross Island colonies, these ... penguins almost certainly undertake the longest migrations for the species. Previous work has suggested ...
Meeting Document : WG-EMM-10/P11 : Autor(es): G. Ballard, V. Toniolo, D.G. Ainley, C.L. Parkinson, K.R. Arrigo and P.N. Trathan
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Habitat partitioning in Antarctic krill: spawning hotspots and nursery areas
concentrated within the south-west Atlantic sector, where they support a unique food web and a commercial ... whether “hotspots” of egg production and early stage nursery occurred, and secondly whether the available ... habitat was partitioned between the successive life stages during the austral summer and autumn, when ... extracted data spanning 41 years (1976-2016) from the existing KRILLBASE-abundance and KRILLBASE-length ...
Meeting Document : WG-EMM-2019/20 : Autor(es): F. Perry, A. Atkinson, S.F. Sailley, G.A. Tarling, S.L. Hill, C.H. Lucas and D.J. Mayor
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Report on fish by-catch on exploratory fishing in Divisions 58.4.1 and 58.4.2
undertaken in Divisions 58.4.1 and 58.4.2 during the 2012 to 2018 seasons. Fish by-catch comprised 14 species ... or groups of species. In 2018, by-catch represented 12% of the total catch (43 tonnes over 307 tonnes ... of Dissostichus spp.) in Divisions 58.4.1 and 58.4.2. 98% of the biomass was represented by 2 ... families: Macrouridae and Channichthyidae. The others most common by-catch species or families were ...
Meeting Document : WG-FSA-18/28 : Autor(es): C. Péron, P. Yates, D. Maschette, C. Chazeau, P. Ziegler, D. Welsford, N. Gasco and G. Duhamel
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Molecular analysis of stomach contents from Antarctic toothfish (Dissostichus mawsoni) collected from Area 58 and 88 from 2016 to 2018
Abstract: Antarctic toothfish, Dissostichus mawsoni is the ecologically important Nototheniidae ... , which is native to the Southern Ocean. Although it plays an important role in the Antarctic ecosystem ... , the ecology of D. mawsoni is still fragmental mainly due to the limited accessibility for the sample ... collection. Diet study provides the basic information of feeding relationship among the different trophic ...
Meeting Document : WG-FSA-2019/37 : Autor(es): S.R. Lee, S.-G. Choi, S. Chung, D.H. An and H.-W. Kim
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Elaborating a representative system of marine protected areas in eastern Antarctica, south of 60°S
Abstract: The plan of implementation for Agenda 21 of the United Nations World Summit on ... Sustainable Development (2002) requires an estate of marine protected areas for the purposes of long‐term ... one that (i) provides a spatial estate of the smallest area sufficient to satisfy the principles of ... Comprehensiveness, Adequacy and Representativeness (CAR) in the long term, (ii) accounts for the state of knowledge ...
Meeting Document : WG-EMM-10/26 : Autor(es): A.J. Constable, B. Raymond, S. Doust, D. Welsford and K. Martin-Smith (Australia)