Résultats de la recherche
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The use of CCAMLR Statistical Subareas 88.1 and 88.2 and Division 58.4.1 by Macquarie Island giant petrels
summer of 2005-06. Adults of both species spent time in areas under CCAMLR jurisdiction. Adult southern ... giant petrels spent 37% of their overall time at sea in statistical sub-area 58.4.1, and 14% in sub-area ... enter CCAMLR waters, one bird undertook a longer trip into division 58.4.1, where it spent 6% of its ... overall time at sea. We consider it possible that this trip may have been indicative of trips undertaken ...
Meeting Document : WG-FSA-06/49 : Auteur(s): R. Trebilco, R. Gales, B. Baker and A. Terauds (Australia)
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Seabird research at Cape Shirreff, Livingston Island, Antarctica, 2006/07
mean foraging trip duration during chick- rearing was approximately one hour longer than in 2005-06 ... in interpreting the foraging trip data. Fledgling success and chick fledging mass in 2006-07 were ... Abstract: Our tenth season of seabird research at Cape Shirreff allowed us to assess trends in ... penguin population size, as well as inter-annual variation in reproductive success, diet and foraging ...
Meeting Document : WG-EMM-07/P1 : Auteur(s): R. Orben, S. Chisholm, A. Miller and W.Z. Trivelpiece (USA)
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Do Adélie penguin fledgling weights provide an index of prey availability?
Abstract: We examine fledgling weights measured over 11 years at Béchervaise Island in relation ... to two assumed proxies of prey availability: breeding success and foraging trip duration. Concordance ... between the two proxies was apparent when considering guard stage foraging trip durations but this was not ... as strong for the crèche foraging trips later in the season. Fledgling weights which are measured at ...
Meeting Document : WG-EMM-05/21 : Auteur(s): L. Emmerson, C. Southwell and J. Clarke (Australia)
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DEVELOPMENT OF A METHODOLOGY FOR DATA QUALITY ASSESSMENT
biological sampling data from a fishing trip. In particular these measures aim to quantify the prevalence of ... assist in assessing which data from a trip should be used in an assessment, and can also guide how these ... is fitted in an assessment model.The data quality measures illustrate sometimes substantial variation ... in the quality of particular data sets from different trips in the Ross Sea Antarctic toothfish ...
Meeting Document : WG-SAM-08/13 : Auteur(s): D.A.J. Middleton and A. Dunn (New Zealand)
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Estimating density and biomass of Antarctic krill (Euphausia superba) around South Shetland using the 2-dB difference method
estimated using an acoustics survey. Acoustic data were collected with 38 and 120 kHz from April 13 to 24 in ... 2016 and 38 and 200 kHz from March 6 to 14 and 38 and 120 kHz on April 27 and May 5 in 2017. Krill were ... and 83 thousand tonnes (CV=31.4%) applying S v difference-3.0-13.8 dB in 2017, respectively. Krill ... density and biomass were significantly higher in 2016 than those in 2017. Author(s): S. Choi, K. Lee and ...
Meeting Document : SG-ASAM-18/08 : Auteur(s): S. Choi, K. Lee and D. An
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Analysis of trawl data from the South Georgia krill fishery
Abstract: Data from individual trawls carried out by vessels operating in the krill fishery at ... focussed, operating in a limited area along the shelf edge on the northern coast of the island. Each day a ... large number of trawls were undertaken by each,vessel, with trawls being shorter in duration during the ... the variability are discussed in relation to the biology of krill, others are discussed in relation to ...
Meeting Document : WG-EMM-97/41 : Auteur(s): Parkes, G., Trathan, P.N., Everson, I., Murphy, E.J.
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Seabird research at Cape Shirreff, Livingston Island, Antarctica, 2003–2004
examine trends in penguin populations, as well as inter-annual variation in reproductive parameters ... decline over the past five years, and is at its lowest size in the past seven years of study. While the ... gentoo breeding population increased slightly from last year, it is at its second lowest size in the past ... seven years. Chinstrap fledging success was higher during the 2003-04 breeding season than in the ...
Meeting Document : WG-EMM-04/5 : Auteur(s): M. Antolos, A.K. Miller and W.Z. Trivelpiece (USA)
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The diet of Antarctic fur seals Arctocephalus gazella during the breeding season at Heard Island
Heard Island fed mainly on fish with an average 95.2% of scats in monthly collections containing fish ... and skate (Bathyraja sp.), the latter being found in over 60%-of scats in October and November. The ... . There the increase is thought to be due to the high availability of krill E. superba, but, in the ... on Heard Island grounds must be considered in this light. Author(s): Delegation of Australia Title ...
Meeting Document : SC-CAMLR-VIII/BG/53 : Auteur(s): Delegation of Australia
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The diet of Antarctic fur seals Arctocephalus gazella during the breeding season at South Georgia
Euphausia superba was the main prey item, occurring in 88% of all scats (n=497), whereas fish occurred in 47 ... % and squid in 5%. There was considerable intra and inter-annual variation in the characteristics of ... selecting particular sizes of krill and, therefore, that the krill in the diet reflects the krill available ... around South Georgia. The absence of group 3 krill (44-48 mm in length) in the South Georgia area, as ...
Meeting Document : WG-EMM-95/28 : Auteur(s): Arnould, J.P.Y., Reid, K.
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Krill biomass estimates for South Georgia, December and January 1996/97
eastern and western survey boxes were 36.1 mm and 45.4 mm respectively. These lengths were used to derive ... (18.44) for the eastern and western boxes respectively. These mean density values were similar to those ... obtained during the n10st recent previous surveys of krill biomass (January 1996) in these areas, but ... substantially higher than estimates derived from surveys there in January 1994. Author(s): Goss, C., Watkins ...
Meeting Document : WG-EMM-97/48 : Auteur(s): Goss, C., Watkins, J.L., Brierley, A.S.