Resultados de la búsqueda
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Solutions to seabird by-catch in Alaska’s demersal longline fisheries
fishery for Pacific cod. We conducted tests over two years to account for inter-annual variation and allow ... for improvement and innovation. A key feature of this program was an industry-agency-academic ... setting gear and the need for report card and peer-review systems, as well as the need for national and ... Abstract: This research program compared seabird bycatch mitigation strategies over 2 years (1999 ...
Meeting Document : WG-FSA-01/35 : Autor(es): E.F. Melvin, J.K. Parrish, K.S. Dietrich and O.S. Hamel (USA)
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A CHARACTERISATION OF THE TOOTHFISH FISHERY IN SUBAREAS 88.1 AND 88.2 FROM 1997/98 TO 2008/09
Abstract: The exploratory fishery for Dissostichus spp. has now been operating for 13 years in ... Subarea 88.1 and for 8 years in Subarea 88.2. During that time a large amount of distributional and ... in depth/location of fishing, and length and age structure of the population. The catch limit was ... steadily increased over the first seven years of the fishery but has since stabilised at about 1000–1200 m ...
Meeting Document : WG-FSA-09/36 : Autor(es): S.M. Hanchet, A. Dunn and S. Mormede (New Zealand)
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Seasonal and interannual variability of krill, salp and other zooplankton populations in the northwest Antarctic Peninsula region: summer 2001 in relation to the Long-Term AMLR Data Set
past 20 years. This resulted from large concentrations of Calanoides acutus, Metridia gerlachei and ... Island region during 18-30 January 2001 (Survey A, 101 stations) and 12 February-12 March 2001 (Survey D ... spawning conditions have been favorable for krill recruitment success. Both large area surveys were ... 1993 and 1998 salp years were not encountered. Length frequency distribution of the dominant aggregate ...
Meeting Document : WG-EMM-01/45 : Autor(es): V. Loeb (USA)
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Population of macaroni penguins Eudyptes chrysolophus at Marion Island, 1994/95 to 2002/03, with information on breeding and diet
, macaroni penguins usually breed for the first time when aged about three years. From 1994/95–2002/03, pairs ... fledged on average 0.46 chicks per year, an amount thought insufficient to maintain the population ... 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 : Autor(es): 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 : Autor(es): 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 : Autor(es): 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 : Autor(es): 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 : Autor(es): 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 : Autor(es): 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 : Autor(es): K. Reid, J.P. Croxall and E.J. Murphy