Résultats de la recherche
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VARIATION IN DEMERSAL FISH SPECIES RICHNESS IN THE OCEANS SURROUNDING NEW ZEALAND: AN ANALYSIS USING BOOSTED REGRESSION TREES
characteristics using an extensive collection of trawl data from the oceans around New Zealand. Analyses were ... ‘stochastic gradient boosting’). Depth was the single most important environmental predictor of variation in ... species richness, with highest richness occurring at depths of 900 to 1000 m, and with a broad plateau of ... concentrations of chlorophyll a and in zones of mixing of water bodies of contrasting origins. Local variation in ...
Meeting Document : WS-VME-09/P04 : Auteur(s): Leathwick, J.R., Elith, J., Taylor, P., Francis, M.P., Hastie, T.
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Hydrographic conditions in the Elephant Island plateau region during December 1996
modem software as described in this paper, handling of large data bases becomes very easy. Author(s ... collected by German research vessels in this region. By means of a new interactive software water mass ... boundaries are outlined which reveal the approximate location of the Weddell-Scotia Confluence. Vertical ... distribution of oceanographic parameters temperature, salinity and density is discussed. Geopotential anomaly ...
Meeting Document : WG-EMM-97/06 : Auteur(s): Stein, M.
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Beach litter survey Signy Island, South Orkney Islands, 1992/93
their origin noted. At Foca Cove, a total of 23 items were recovered with a combined weight of 4.45 kg ... . At Cummings Cove, a total of 42 items were recovered (9.10 kg). No debris was found at Starfish Cove ... . Comparison with the 1990/91 and 1991/92 litter surveys showed a dramatic drop in both the weight of debris ... and the total number of items recovered. For example, at Foca Cove, the total weight of debris ...
Meeting Document : CCAMLR-XII/BG/07 : Auteur(s): Delegation of United Kingdom
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Inter-annual variability in krill density at South Georgia: 1997–2012
, maintaining very large numbers of predators, and fluctuations in their abundance can affect the overall ... structure and functioning of the ecosystems. The inter-annual variability in the abundance and biomass of ... krill was examined using a 15 year time series of acoustic observations undertaken in the Western Core ... Box (WCB) survey area to the north of South Georgia, Southern Ocean. Krill targets were identified in ...
Meeting Document : WG-EMM-13/14 : Auteur(s): S. Fielding, J.L Watkins, P. Trathan, P. Enderlein, C. Waluda, C. Goss, G. Stowasser, G. Tarling and E. Murphy (United Kingdom)
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Diet components and trophic interactions in five demersal fish in CCAMLR Subarea 48.3
Abstract: Diet components and trophic interactions in five demersal fish caught around of South ... Georgia’s waters was determined. Data were obtained from samples of Champsocephalus gunnari, Chaenocephalus ... carried out during the month of May 2013, on board of RV DY Eduardo L. Holmberg (INIDEP), at depths from ... 74 to 240 m. Prey Specific Index of Importance (%PSIRI) by each prey in each predator and, trophic ...
Meeting Document : WG-FSA-13/60 : Auteur(s): N.R. Marí and G.H. Troccoli (Argentina)
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Soft-sediment macrozoobenthos from Domain 1 (Antarctica): A preliminary report using community parameters and proxies
Abstract: The present scientific report presents the analysis of a database compilation in order ... carbon (TOC) present on the seafloor of Domain 1. The soft sediment macrobenthic communities were ... analyzed from different approaches. We describe the macrobenthos by means of traditional parameters such as ... abundance and biomass. The biodiversity of two selected and taxonomical well-studied taxa (Polychaeta and ...
Meeting Document : SC-CAMLR-XXXVI/BG/10 : Auteur(s): Delegation of Chile
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Krill (Euphausia superba) distribution contracts southward during rapid regional warming
that, within their main population centre in the southwest Atlantic sector, the distribution of ... the Antarctic shelves. A concomitant increase in mean body length reflects reduced recruitment of ... juvenile krill. We found evidence for environmental controls on recruitment, including a reduced density of ... juveniles following positive anomalies of the Southern Annular Mode. Such anomalies are associated with warm ...
Meeting Document : WG-EMM-2019/P02 : Auteur(s): A. Atkinson, S.L. Hill, E.A. Pakhomov, V. Siegel, C.S. Reiss, V.J. Loeb, D.K. Steinberg, K. Schmidt, G.A. Tarling, L. Gerrish and S.F. Sailley
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Revised growth and length-weight parameters for Antarctic toothfish in the Ross Sea region (881 & 882AB)
Abstract: We update the estimates of the growth and length-weight parameters for Antarctic ... estimates of the von Bertalanffy growth curves, estimates of mean length at age using maximum likelihood ... fishing operations in the Ross Sea region. Estimates of growth and length-weight were similar to those ... previously used, however there was some suggestion that the shape of the growth curve may be better ...
Meeting Document : WG-FSA-2019/11 : Auteur(s): A. Dunn and S. Parker
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Species profile for Antarctic toothfish (Dissostichus mawsoni)
Abstract: A toothfish species profile, covering aspects of the biology, fisheries and stock ... assessment of both toothfish species was completed by Everson (2002). Aspects of the biology of D. mawsoni ... documents to WG-FSA. The aim of the current work was to collate and summarise existing biological data on D ... most of the work has been carried out, but data from the other areas and fisheries have been included ...
Meeting Document : WG-FSA-06/26 : Auteur(s): S.M. Hanchet (New Zealand)
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Current temperature conditions off South Georgia during recent years (satellite data on Subarea 48.3)
Abstract: Satellite monitoring of sea surface temperatures (SST) off South Georgia (Subarea 48.3 ... ) which includes both analysis of real-time data from vessels and buoy stations provides constant ... information on the temperature conditions of the area. Weekly SST maps constructed from GOES-E and Meteosat-7 ... daily satellite data are used to develop maps of mean monthly SST and SST anomalies. For quantitative ...
Meeting Document : WG-EMM-02/17 : Auteur(s): G.P. Vanyushin (Russia)