Resultados de la búsqueda
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Network characterisation of the food-web of the Ross Sea, Antarctica
trophic level; (2) mixed trophic impact; and (3) ecological importance. Note that the analysis considers ... not resolved by this analysis. The Ross Sea food-web is a partially inverted biomass pyramid with a ... pronounced peak in biomass in the lower-middle part of the food-web, a result of high biomass of ... the total living biomass in the Ross Sea (bacteria excluded). The six groups with the highest ‘indices ...
Meeting Document : WG-EMM-12/53 : Autor(es): M.H. Pinkerton and J.M. Bradford-Grieve (New Zealand)
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DEPREDATION AROUND SOUTH GEORGIA AND THE IMPLICATIONS ON STOCK ASSESSMENT OF D. ELEGINOIDES
catch per unit efforts (CPUEs) with and without the presence if cetaceans, the amounts lost were also ... %) with killer whales present on 562 lines (3.8%) and sperm whales on 2588 lines (17.7%). By comparing the ... . To date, a total of 35 killer whales and 65 sperm whales have been seen, with re-sightings occurring ... both in season and between years. Hydrophones deployed on longlines recorded both vocalisations of ...
Meeting Document : WG-FSA-09/16 : Autor(es): J. Moir Clark, D.A. Agnew, P. McCarthy and M. Unwin (United Kingdom)
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Age estimation and maturity of the ridge-scaled macrourid (Macrourus whitsoni) from the Ross Sea
research vessel Tangaroa during the BioRoss survey of the Western Ross Sea and Balleny Islands, with the ... structure displayed in the early growth rings. The findings supported the interpretation protocols used in ... results finding no significant differences between the years. Von Bertalanffy parameters for the pooled ... dataset with unsexed juveniles are L? 76.12, K 0.065 and t0-0.159 for males and L? 92.03, K 0.055 and t0 ...
Meeting Document : WG-FSA-05/20 : Autor(es): P.M. Marriott, M.J. Manning and P.L. Horn (New Zealand)
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RECENT POPULATION ESTIMATES AND TRENDS IN NUMBERS OF ALBATROSSES AND GIANT PETRELS BREEDING AT THE SUB-ANTARCTIC PRINCE EDWARD ISLANDS
(3% per year). The estimate of Indian yellow-nosed albatrosses T. carteri at Prince Edward Island was ... group (Marion and Prince Edward islands) was conducted during December 2008, seven years after the ... a negative trend from the early 1980s, whereas lightmantled sooty albatrosses P. palpebrata have ... (pairs) at the two islands are 3 650 wandering albatrosses, 9 500 grey-headed albatrosses, 7 000 Indian ...
Meeting Document : WG-EMM-10/P4 : Autor(es): P.G. Ryan, M.G.W. Jones, B.M. Dyer, L. Upfold and R.J.M. Crawford
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Seabird research at Cape Shirreff, Livingston Island, Antarctica, 2003–2004
decline over the past five years, and is at its lowest size in the past seven years of study. While the ... seven years. Chinstrap fledging success was higher during the 2003-04 breeding season than in the ... previous season, but lower than the average for the past seven years. Gentoo fledging success in 2003-04 ... past seven years study. Chinstrap penguin diet contained more fish than in other years on average ...
Meeting Document : WG-EMM-04/5 : Autor(es): M. Antolos, A.K. Miller and W.Z. Trivelpiece (USA)
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Interannual variations of water thermochaline structure on South Georgia Island, South Orkney Islands and Shetland Islands shelves
intermediate cold layer. In some years of this type (1 97 1, 1972, 1978, 1982) the layer had positive ... temperature, while in other years (1980, 1981) the layer temperature was negative. The second year type (1979 ... area of South Orkney Isls and Shetland Isls in January-February since 1970. Three types of years have ... could be used when analysing krill aggregations' distribution and density for the period of years ...
Meeting Document : WG-EMM-00/34 : Autor(es): P. Chernyshkov, V. Shnar, O. Berezhinsky and I. Polischuk (Russia)
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DEVELOPMENT OF RECOVERY PLANS FOR DEPLETED TOOTHFISH STOCKS IN THE INDIAN OCEAN SECTOR OF THE SOUTHERN OCEAN
years and then two years later. The surveys should have only low catches in order to not impede recovery ... along with the estimated time series of historical catches are used to provide estimates of B0 for this ... trajectories indicate it is likely that it will be at least 5 years before it is sufficiently low risk to ... comparison with historical catch rates and otolith collection to estimate age structure and recruitment ...
Meeting Document : WG-FSA-09/44 : Autor(es): D.C. Welsford, A.J. Constable and J.P. McKinlay (Australia)
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The relationship between sea-ice cover and Adélie penguin reproductive performance at Béchervaise Island
Abstract: The relationship between Adélie penguins and ice is undeniable, with ice influencing ... population growth in response to a reduction in the frequency of heavy sea-ice years. However, it is ... influences, such as primary productivity or foraging trip duration. To further explain the relationship ...
Meeting Document : WG-EMM-07/21 : Autor(es): L. Emmerson and C. Southwell (Australia)
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The Antarctic toothfish Dissostichus mawsoni (Nototeniidae) nutrition in the Ross Sea during the fishing season 2011/12
Abstract: During fishing trip of F/V «Jung Woo 3» (Republic of Korea) in the Ross Sea over 29 ... various SSRUs correlate positively with the average catches per day. Preys toothfish had length from 8 to ...
Meeting Document : WG-FSA-12/06 : Autor(es): Yu.V. Korzun and N.A. Misar (Ukraine)
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Preliminary results from a study examining spatial structure and connectivity in Patagonian toothfish (Dissostichus eleginoides) in the South Atlantic section of the Southern Ocean
signatures could discriminate between geographic locations along the Scotia Arc and along the eastern South ... material in the otolith nuclei, formed during the early life history: similar nucleus signatures can be ... caught further west, implying a stock boundary. Although fish caught off the eastern North Scotia Ridge ...
Meeting Document : WG-FSA-03/86 Rev. 1 : Autor(es): J.R. Ashford (USA), A. Arkhipkin (United Kingdom) and C.M. Jones (USA)