Résultats de la recherche
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Entanglement of Antarctic fur seals (Arctocephalus gazella) in man made debris at Bird Island, South Georgia, during the 2006 winter and 2006/07 breeding season
unknown. The increase in the number of winter entanglements (41) and animals with severe wounding (20) was ... majority of the sexed individuals in all age classes (43%) compared to males (33%) and the remainder ... the highest recorded in 14 years, whilst the recent escalation in summer entanglements since 2004/05 ... is also a cause for concern. Author(s): Delegation of the United Kingdom Title: Entanglement of ...
Meeting Document : SC-CAMLR-XXVI/BG/17 : Auteur(s): Delegation of the United Kingdom
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Estimating the impact of depredation by killer whales and sperm whales on longline fishing for toothfish (Dissostichus eleginoides) around South Georgia
, depressing CPUE by up to 20%. Sperm whales have been more frequently encountered in recent years, occurring ... %. Author(s): J. Moir Clark and D.J. Agnew Title: Estimating the impact of depredation by killer whales ...
Meeting Document : WG-FSA-10/P06 : Auteur(s): J. Moir Clark and D.J. Agnew
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Marine debris and entanglements at Bird Island and King Edward Point, South Georgia, Signy Island, South Orkneys and Goudier Island, Antarctic Peninsula 2012/13
(operational during summer only; 25 November 2012 to 20 March 2013) recorded a total of 13 items of beached ... lowest recorded in 23 years of summer surveys at Signy Island, possibly due to sea-ice coverage at the ... and giant petrels, but above the mean for black-browed albatrosses. Author(s): Delegation of the ...
Meeting Document : SC-CAMLR-XXXII/BG/05 : Auteur(s): Delegation of the United Kingdom
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Disentangling the influence of three major threats on the demography of an albatross community
threats on the demography of seabird communities is vital for evidence-based conservation. Using 20 years ... negative relationships with survival, and explained 21.2% and 22.3-31.6% of the variability. Author(s ...
Meeting Document : WG-FSA-2019/34 : Auteur(s): J.B. Cleeland, D. Pardo, B. Raymond, G.N. Tuck, C.R. McMahon, R.A. Phillips, R. Alderman, M.-A. Lea and M.A. Hindell
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Population dynamics of black-browed and grey-headed albatrosses Diomedea melanophrys and D. chrysostoma at Campbell Island, New Zealand, 1942–96
increasing slightly at average rates of 1.1% and 2.1% per annum at two colonies. The long-term downward trend ... and 0.953, respectively). Black-browed Albatrosses breed for the first time at a younger average age ... than do Grey-headed Albatrosses (10 years and 13.5 years, respectively), have a higher average breeding ... conditions influence demographic characteristics. Author(s): S.M. Waugh (New Zealand), H. Weimerskirch ...
Meeting Document : WG-FSA-04/58 : Auteur(s): S.M. Waugh (New Zealand), H. Weimerskirch (France), P.J. Moore and P.M. Sagar (New Zealand)
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Summary of holdings of Patagonian toothfish (Dissostichus eleginoides) otoliths and size-at-age estimates from Heard and McDonald Islands (Division 58.5.2)
aged from the annual trawl survey or the longline fishery, making constructing historical season by ... has yielded data which has assisted with understanding age structure and growth rates of toothfish in ... individuals which have been processed by the Central Ageing Facility to provide size-at-age estimates. Over ... collected from recaptured tagged fish. More than 3200 otoliths have been processed to provide size-at-age ...
Meeting Document : WG-FSA-07/45 : Auteur(s): D.C. Welsford and G.B. Nowara (Australia)
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Variations in the diet composition and feeding intensity of mackerel icefish (Champsocephalus gunnari) at South Georgia (Antarctic)
replace d by the ubiquitous Themisto gaudichaudii. The occurrence of krill in the diet in 1991 was one of ... the lowest within a 28 year period of investigation. Variation in food composition between sampling ... energy content appears to be the prefered diet. In years of krill shortage, such as in 1991, krill is ... gonad maturation in order to maintain body size. Author(s): K.-H. Kock and S. Wilhelms (Germany), I ...
Meeting Document : WG-FSA-93/24 : Auteur(s): K.-H. Kock and S. Wilhelms (Germany), I. Everson (United Kingdom) and J. Gröger (Germany)
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Comparison of equal-area cylindrical and circular piston transducers
between cylindrical and circular piston transducers by comparing the performance of the two according to ... of 20 dB, the active sonar equation is exercised to estimate the maximum detection range of both ... problems requiring future treatment are identified. Author(s): Foote, K.G. Title: Comparison of equal ...
Meeting Document : WG-EMM-95/08 : Auteur(s): Foote, K.G.
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Preliminary assessment of the South Georgia toothfish stock, 2007
be considered, and that the toothfish assessment is undertaken at periods of greater than one year ... estimates year class strength which corresponds, in some years, with estimates made from the South Georgia ... higher than was estimated last year. 2. Improvements are made to the fit of tag data through (a ... retardation than larger fish, and that on average it is 1 year or more. 3. A new model is developed which uses ...
Meeting Document : WG-FSA-07/29 : Auteur(s): D.J. Agnew, R. Hillary and J. Pearce (United Kingdom)
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Environmental variability and the behavioural dynamics of Antarctic fur seals in the South Atlantic
had strong effects when lagged by one year. This was supported by bivariate correlation between the ... gazella) over 15 years at the island of South Georgia in relation to major indices of southern hemisphere ... . Author(s): I.L. Boyd (UK) Title: Environmental variability and the behavioural dynamics of Antarctic ...
Meeting Document : WS-AREA 48-98/16 : Auteur(s): I.L. Boyd (UK)