Résultats de la recherche
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Target strength of Antarctic krill
Abstract: In-situ measurements of individual krill target strength are presented (modal value ... reproductively mature and averaged 47.44mm in length. Results agree well with recent predictions of acoustic ... target strength based on extrapolations of other field experiments using the bent cylinder model of sound ... scattering by elongated zooplankters. The modal value of the measurements is 6.7dB lower than that predicted ...
Meeting Document : WG-KRILL-91/13 : Auteur(s): R.P. Hewitt and D.A. Demer (USA)
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Abundance estimation of Adélie penguins colony at Esperanza/Hope Bay
, similar to what has been observed in other colonies throughout the WAP. The assessment of this population ... will contribute to the estimate of total predator biomass in Area 48. Author(s): M.M. Santos, N.R ... Abstract: We conducted a whole-colony census of the Adélie penguin colony at Esperanza/ Hope Bay ... /96 to 2012/13. Both the whole colony and the selected breeding groups exhibit population declines ...
Meeting Document : WG-EMM-13/43 : Auteur(s): M.M. Santos, N.R. Coria, E. Barrera-Oro (Argentina) and J.T. Hinke (USA)
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Preliminary results from CEMP monitoring of Antarctic fur seals, chinstrap penguins and macaroni penguins at Bouvetøya 1996/97
was established at the CEMP site, Nyrøysa, on the western coast of the island. Species included in the ... sharply since the last count in 1989/90. The population of Macaroni Penguins has shown a more moderate ... from the first season of CEMP monitoring (parameters A3, A4, A5, A6, A8, A9, C1 and C2) are reported ... population changes of penguins and fur seals). The population of Chinstrap Penguins at Nyrøysa has declined ...
Meeting Document : WG-EMM-97/20 : Auteur(s): Hofmeyr, G.J.G., Dyer, B.M., Næstvold, A., Mehlum, F., Gjertz, I., Bakken, V., Isaksen, K., Huyser, O.
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Approaches to evaluating and testing of CEMP methods for parameters A1, A5 and A7
description of foraging trip duration using the mean arising from a bimodal distribution of trip durations may ... Abstract: The methods and presentation of CEMP parameters A1, A5 and A7 where evaluated using ... simulated time-series data. The effects of sampling timing and intensity during five-day periods for ... around the peak arrival/fledging date may introduce substantial bias in CEMP parameters A1and A7. The ...
Meeting Document : WG-EMM-04/60 : Auteur(s): G. Watters (USA) and K. Reid (United Kingdom)
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Spawning activity of mackerel icefish at South Georgia
intensity almost certainly occurs over much of the shelf although the intensity appears to be small in ... Abstract: Historical information is assessed on the distribution of spawning and larval mackerel ... April within and close to the bays on the north side of the island. Some spawning at much lower ... comparison with inshore spawning. There is some evidence for spawning at Shag Rocks although the precise ...
Meeting Document : WG-FSA-00/27 : Auteur(s): I . Everson, A. North (United Kingdom) and K.-H. Kock (Germany)
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SPATIAL PROTECTION AND MANAGEMENT OF ANTARCTIC MARINE BIODIVERSITY
April 2009). It provides information on the different objectives and types of marine spatial protection ... and management that can be implemented in Antarctic waters, including details on the tools currently ... establishment of effective, representative and coherent spatial protection of marine biodiversity, using the ... full range of tools available under CCAMLR and the ATCM. Cooperate as far as possible with the CEP to ...
Meeting Document : WG-EMM-09/09 : Auteur(s): S. Grant (United Kingdom)
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Electronic monitoring of seabird interactions with trawl third-wire cables on trawl vessels – a pilot study
one-month period in the fall of 2002. Detailed analysis of about 200 hours of fishing imagery occurred ... delivery and head and gut bottom trawl vessels conducting operations in the Bering Sea, U.S. Exclusive ... cables. The EM system provided imagery of sufficient quality to detect the presence, abundance, and ... to detect third-wire entanglements of seabirds although it was not possible to determine the cause of ...
Meeting Document : WG-FSA-04/23 : Auteur(s): H. McElderry, J. Schrader, D. McCullough, J. Illingworth, S. Fitzgerald and S. Davis (USA)
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Electronic monitoring of seabird interactions with trawl third-wire cables on trawl vessels – a pilot study
one-month period in the fall of 2002. Detailed analysis of about 200 hours of fishing imagery occurred ... delivery and head and gut bottom trawl vessels conducting operations in the Bering Sea, U.S. Exclusive ... cables. The EM system provided imagery of sufficient quality to detect the presence, abundance, and ... to detect third-wire entanglements of seabirds although it was not possible to determine the cause of ...
Meeting Document : WG-FSA-04/23text : Auteur(s): H. McElderry, J. Schrader, D. McCullough, J. Illingworth, S. Fitzgerald and S. Davis (USA)
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Modelling growth of Antarctic krill: growth trends with sex, length, season, and region
this model was used to predict seasonal IMP using a model of the average sea-surface temperature ... small to negative values of IGR predominating across all size classes by autumn. The period of rapid ... growth was December in Indian sector, whereas in the Scotia Sea sector it appeared to be a few months ... Abstract: Growth trends of Antarctic krill with sex, length, season and region using over 10 ...
Meeting Document : WG-EMM-05/29 : Auteur(s): S. Kawaguchi, S. Candy, R. King (Australia), M. Naganobu (Japan) and S. Nicol (Australia)
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Estimating abundance of Antarctic fur seals at South Georgia
Abstract: This paper presents a description of the statistical approach developed to estimate ... abundance of Antarctic fur seals at South Georgia. The estimate is based on photographic counts of all the ... breeding beaches in the fur seal’s distribution range. The images were obtained during comprehensive ... helicopter surveys conducted during 2006 and 2008. The proposed Bayesian analysis scales up in situ counts to ...
Meeting Document : WG-EMM-14/09 : Auteur(s): J. Forcada, I.J. Staniland, A.R. Martin, A.G. Wood and P.N. Trathan (United Kingdom)