Résultats de la recherche
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Population of macaroni penguins Eudyptes chrysolophus at Marion Island, 1994/95 to 2002/03, with information on breeding and diet
fledged on average 0.46 chicks per year, an amount thought insufficient to maintain the population ... , macaroni penguins usually breed for the first time when aged about three years. From 1994/95–2002/03, pairs ... large colonies, at Bullard Beach and Kildalkey Bay, account for about 85% of the overall population. At ... decrease of 88% between 1979/80 and 2002/03, most of the decrease occurring after 1983/84. At Marion Island ...
Meeting Document : WG-EMM-03/15 : Auteur(s): R.J.M. Crawford, J. Cooper and B.M. Dyer (South Africa)
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Ageing two myctophid fishes using otolith from king and macaroni penguins in the Marion Island and its implication to feeding preference of penguins on those myctophids
decrease for P. bolini between two readers through repeat reading runs 1 to 3. The age structures of E ... . The age structures of P. bolini are 0.5 to 4.0 years and 1.5 to 4.0 years from King penguins and ... predators, particularly penguins. However, the information on age of those fishes are very limited and ... penguins in the Marion Island, the present study examined the age determination and precision of age ...
Meeting Document : WG-FSA-18/74 : Auteur(s): M. Duan, G.P. Zhu, A. Makhado and L. Wei
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Managing fishing vessels
vessels resulting in an ad hoc patchwork of regulation. The paper identifies a new opportunity for review ... two years proposes two conservation measures which would harmonize requirements for fishing vessels ... Polar Code. However, recognizing that the work on the Polar Code is unlikely to be completed for another ... responsibility for releasing documents: CCAMLR Secretariat ...
Meeting Document : CCAMLR-XXIX/BG/22 : Auteur(s): ASOC Observer
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Evaluation on the performance of echosounder on a fishing vessel using maximum seabed backscattering
Abstract: The performance of echo sounder system is critical for using acoustic data collected ... and 2018) collected at a relatively fixed location with bottom depth around 200 m were used to ... evaluate the potential to use seabed backscattering as an alternative way to the standard sphere ... , dB) for single ping were less than 1.0 dB with 0.35 dB and 0.78 dB at 120 kHz and 38 kHz ...
Meeting Document : SG-ASAM-18/06 : Auteur(s): X. Wang, X. Yu and X. Zhao
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Laboratory target strength measurements of free swimming Antarctic krill (Euphausia superba)
single animal insonifications. For mean length classes in the range [29.6, 36.2] mm the median single ... -animal target strengths are in the range [-76.7,-71.8] dB. Monte Carlo computer simulations were used to ... evaluate the effects of varying the ratio of largest to smallest echo amplitudes for a given ensemble, thus ... bias was then determined for each ensemble of experimental data and used to determine corrections which ...
Meeting Document : WG-EMM-97/75 : Auteur(s): Pauly, T., Penrose, J.D.
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Report on the status of wandering, black-browed and grey-headed albatrosses at South Georgia
by ground counts, indicate more rapid declines: 4.0% p.a. from 1989/90-2003/04 for black-browed ... photography and subsequent counting on computer screen using Adobe Photoshop software. In total, an estimated ... %, respectively. However, comparison of annual totals for Bird Island, which was censused on both occasions mainly ... albatrosses, and 2.9% p.a. from 1990/91-2003/04 for grey-headed albatrosses. Due to the lower accuracy of the ...
Meeting Document : WG-FSA-04/71 : Auteur(s): S. Poncet (United Kingdom),G. Robertson (Australia), R. Phillips (United Kingdom), K. Lawton (Australia), B. Phalan, J. Croxall and P. Trathan (United Kingdom)
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THE POWER OF ECOSYSTEM MONITORING
% power after 20 years with the probability of a type I error (α) = 0.05). The power increased to >50 ... Abstract: 1. Implementing an ecosystem approach to fisheries management requires an effective ... effects of fishing using either the krill population or a combined predator response index was low (20–40 ... to detect the effects of fishing may be limited if there is a requirement for statistical ...
Meeting Document : WG-EMM-08/P11 : Auteur(s): K. Reid, J.P. Croxall and E.J. Murphy
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Proposition visant à limiter le nombre de navires dans les pêcheries exploratoires de légine des sous-zones statistiques 88.1 et 88.2
responds to a concern raised in the first performance review and will support more effective fisheries ... per Member for the two fisheries in Statistical Subareas 88.1 and 88.2. The proposal will help ensure ... management, improve vessel safety, and reduce administrative burdens for members and the Secretariat. Author ... responsibility for releasing documents: New Zealand ...
Meeting Document : CCAMLR-38/26 : Auteur(s): Delegation of New Zealand
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Entanglement of Antarctic fur seals (Arctocephalus gazella) in man-made debris at Bird Island, South Georgia, during the 2002 winter and 2002/03 breeding season
observations), the reasons for this are discussed. Of the entanglements where the animal could be sexed, males ... Georgia for the thirteenth consecutive winter (2002) and fifteenth consecutive summer (2001/02) are ... reported here. The overall number of entanglements showed a decrease from last year of 55% in winter and 67 ... %. Severe injuries accounted for 33% of entanglements over winter and 25% during the summer. As in previous ...
Meeting Document : SC-CAMLR-XXII/BG/11 : Auteur(s): Delegation of the United Kingdom
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Entanglement of Antarctic fur seals Arctocephalus gazella in man-made debris at Bird Island, South Georgia during the 1992 winter and 1992/93 pup-rearing season
disturbing, particularly following two years of relatively low incidence. It cannot be accounted for by ... Abstract: Surveys of Antarctic fur seals entangled in man-made marine debris were carried out for ... winter an unprecedented number of 97 entangled seals were seen, a ten-fold increase on the previous two ... males, the main element of the population seen ashore at Bird Island at this time of year. In the summer ...
Meeting Document : SC-CAMLR-XII/BG/06 : Auteur(s): Delegation of United Kingdom