Résultats de la recherche
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Effects of variability in prey abundance on reproduction and foraging in chinstrap penguins (Pygoscelis antarctica)
. Adults faced with this uncertainty can mechanistically balance parental care by adopting a strategy ... –1992. Regional measures of krill density varied by a factor of 2.5 (47.0, 23.8 and 61.2 gm–2 in 1990 ... in response to decreases in prey abundance in a manner consistent with predictions of life-history ...
Meeting Document : WG-EMM-06/P6 : Auteur(s): D.A. Croll, D.A. Demer, R.P. Hewitt, J.K. Jansen, M.E. Goebel and B.R. Tershy (USA)
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Review of the use of survey data and length-at-age models in the assessment of Dissostichus eleginoides in the vicinity of Heard Island and McDonald Islands (Division 58.5.2)
cohort abundances from CMIX, and to a lesser extent estimated fishing selectivities. A scenario ... length at age, selectivity and the mixtures estimated from the assignment of RSTS hauls, resulted in a ...
Meeting Document : WG-FSA-06/44 Rev. 1 : Auteur(s): D.C. Welsford, A.J. Constable and G.B. Nowara (Australia)
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Review of CCAMLR activities on monitoring marine debris in the Convention Area
wood items, reached a peak in the period 1994-1996 at Bird Island and Signy Island, but have declined ... Island reached a peak in 1993 and has showed a general decline since, with the lowest levels on record ...
Meeting Document : SC-CAMLR-XXIV/BG/13 : Auteur(s): Secretariat
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Warp strike observations
summer of 2004 – 2005. The aim of the work was to test a new protocol for quantifying warp-strikes and to ... -specialist observers, to provide a robust and objective assessment of warp strike occurrence. The key results ... type • 106 dead or injured birds were recovered from the tows, a rate of 0.2 birds per tow (c. v. 13 ...
Meeting Document : WG-FSA-05/40 : Auteur(s): E. Abraham (New Zealand)
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An updated descriptive analysis of the Antarctic toothfish (Dissostichus mawsoni) tagging scheme in the Ross Sea for the years 1997/98 to 2004/05
. A total of 4903 Antarctic toothfish have been released and 89 recaptured, and 443 Patagonian ... (>35 kg) are difficult to tag without significant damage to fish, and there is be a trade-off ... growth rates predicted from the von Bertalanffy growth curve. Author(s): A. Dunn, S.M. Hanchet and K ...
Meeting Document : WG-FSA-05/34 : Auteur(s): A. Dunn, S.M. Hanchet and K. Maxwell (New Zealand)
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Mitigation trials and recommendations to reduce seabird mortality in the pelagic icefish (Champsocephalus gunnari) fishery (Subarea 48.3)
collect baseline data on general seabird abundance while fishing. Priority was placed on developing a new ... ‘dangerous’ 200mm net meshes to a safer 140mm, the use of additional weighting on the net body during hauling ... to reduce the amount of time that the net is on the surface, and the placing of a small-mesh ‘jacket ...
Meeting Document : WG-FSA-05/59 : Auteur(s): J.O. Roe (United Kingdom)
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Review of CCAMLR activities on monitoring marine debris in the Convention Area
Islands). Marine debris, principally packaging items, fishing gear, and wood items, reached a peak in the ... Bird Island reached a peak in 1993 and has showed a general decline since, with the lowest levels on ...
Meeting Document : SC-CAMLR-XXIII/BG/11 : Auteur(s): Secretariat
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Reconciling fisheries with conservation: three examples from the Southern Ocean
employed by CCAMLR is the application of a precautionary approach, which explicitly incorporates ... a unique set of circumstances and unresolved concerns. While the current fishery for krill is small ... land-breeding krill predators may pose a threat as well as those posed by the broader-scale influence ...
Meeting Document : WG-EMM-04/48 : Auteur(s): R.P. Hewitt (USA), I. Everson (United Kingdom) and C.D. Jones (USA)
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Report on the effectiveness of integrated weight (fast sinking) longlines in reducing the mortality of white-chinned petrels and sooty shearwaters in autoline longline fisheries
applies, and are considered a worse-case scenario from a risk assessment perspective. In the experiments ... -chinned petrels and up to 400 sooty shearwaters. Lines were set in day-light and at night, and a single ...
Meeting Document : WG-FSA-04/72 : Auteur(s): G. Robertson (Australia), N. Smith (New Zealand), B. Wienecke and S. Candy (Australia)
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Population structure of icefish (Champsocephalus gunnari) in the South Georgia area (Antarctic)
large fish above 40 cm in length in catches. These distinctions are the result of a certain geographic ... with a high probability that C.gunnari population in the South Georgia area is the major reproductive ... unit of the area distributing currently near the Island, while the shallow Shag Rocks area is a zone of ...
Meeting Document : WG-FSA-04/40 : Auteur(s): Zh.A. Frolkina and I.A. Trunov (Russia)