Resultados de la búsqueda
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Fishery monitoring and closure procedures
interpretation and application of procedures to monitor and forecast closures in CCAMLR fisheries in the 2018/19 ... season. Key issues in applying the procedures, and specific instances which resulted in catch over-runs ... and under-runs in certain circumstances are examined. Author(s): CCAMLR Secretariat Title: Fishery ...
Meeting Document : CCAMLR-38/BG/12 : Autor(es): CCAMLR Secretariat
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Age estimation and maturity of the ridge-scaled macrourid (Macrourus whitsoni) from the Ross Sea
analysis of otoliths from small specimens greatly increased confidence in the interpretation of the zone ... structure displayed in the early growth rings. The findings supported the interpretation protocols used in ... results finding no significant differences between the years. Von Bertalanffy parameters for the pooled ... –at–maturity (10.6 years, 13.6 years) are presented for males and females respectively, using a ...
Meeting Document : WG-FSA-05/20 : Autor(es): P.M. Marriott, M.J. Manning and P.L. Horn (New Zealand)
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Summary of Ross Sea skate tagging programme results
Abstract: Over 9,000 skates have been tagged and released in the Ross Sea over a period of seven ... years, and 47 (0.5%) have been recaptured. The recapture of tagged Amblyraja georgiana after up to four ... years at liberty shows that some skates survive and recover from being hauled out of depths of around ... 1,000 m and tagged. In-water tagging greatly reduces the incidence of broken jaws in skates, and ...
Meeting Document : WG-FSA-06/32 : Autor(es): S.L. Ballara, A. Dunn and M.P. Francis (New Zealand)
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A simple approach for calculating the potential yield of krill from biomass survey results
-exploitation level over a 20 year period of harvesting should not exceed l0%. The value of λ depends strongly ... Abstract: Estimates are calculated for the parameter λ in the yield equation Y = λ M B0 for a ... kri11 fishery in which both the fishery and kri11 growth are seasonal. The criterion used for the ... calculations is that the probability that the kri11 spawning biomass drops below 20% of its average pre ...
Meeting Document : WG-KRILL-91/24 : Autor(es): D.S. Butterworth (South Africa) and M. Basson (United Kingdom)
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Temperature-dependent growth of Thysanoessa macrura: inter-annual and spatial variability
. We analyzed data from four separate years (1995, 1998, 2001, 2004) that varied widely in temperature ... growth. Growth rates of T. macrura varied between years and water masses, ranging from-0.037 mm day-1 in ... than in Weddell Sea water during all years. Growth rates were strongly correlated with temperature but ... which vary in space and time. Because species specific responses in growth rates to environmental ...
Meeting Document : WG-EMM-13/39 : Autor(es): R.M. Driscoll, C.S. Reiss and B.T. Hentschel (USA)
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Do the males of Dissostichus eleginoides grow faster, or only mature before females?
sex in samples coming from South Georgia Islands. The results show that the differences are due to ... concluded that the males mature for the first time at 4 years age and females at 10 years age, reaching 100 ... % maturity at 12 years age the males and 21 years age the females. Author(s): C.A. Moreno (Chile) Title: Do ...
Meeting Document : WG-FSA-98/16 Rev. 1 : Autor(es): C.A. Moreno (Chile)
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Breeding and post-breeding foraging locations of Adélie penguins at Hope Bay/Esperanza, Antarctic Peninsula
colony and in the northern Bransfield Strait/Mar de la Flota in both years. During the pre-moulting ... /Esperanza, during the late part of the breeding season and their subsequent post breeding dispersal in two ... consecutive years. We also compare data from the krill fishery to describe Adélie penguin foraging areas with ... period, Adélie penguins dispersed away from the colony and foraged further to the east in the northern ...
Meeting Document : WG-EMM-14/42 : Autor(es): M.M. Santos (Argentina), P.N. Trathan (UK), S. Thanassekos (Secretariat), E.F. Rombolá, M.A. Juáres (Argentina), K. Reid (Secretariat) and J.T. Hinke (USA)
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PROPUESTA PARA REALIZAR UNA PROSPECCIÓN PATROCINADA POR LA CCRVMA CON EL FIN DE EFECTUAR UN SEGUIMIENTO DE LA ABUNDANCIA DE PRE-RECLUTAS DE LA AUSTROMERLUZA ANTÁRTICA EN EL SUR DEL MAR DE ROSS
years in Subarea 88.1 and for nine years in Subarea 88.2. The research and assessment work in these ... locations in different years, making it impossible to develop a consistent time series that would monitor ... estimate of the fisheries potential yield. However, one source of ongoing uncertainty in the stock ... assessment concerns recruitment dynamics. Pre-recruit Antarctic toothfish fish are caught in various ...
Meeting Document : SC-CAMLR-XXX/07 : Autor(es): Delegation of New Zealand
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Diet variability and reproductive performance of macaroni penguins (Eudyptes chrysolophus) at Bird Island, South Georgia
(Euphausia superba) was the main prey in 17 out of 22 years. Amphipods (Themisto gaudichaudii) were the main ... gross energy content of individual meals was often above average in years when the diets contained fewer ... euphausiids, but fledging mass was always below average in these years. Although macaroni penguins are able to ... . frigida) in 2000. There was no clearly dominant prey group in 1999. The five-year average proportion of E ...
Meeting Document : WG-EMM-12/17 : Autor(es): C.M. Waluda, S.L. Hill, H.J. Peat and P.N. Trathan (United Kingdom)
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A BALANCED MODEL OF THE FOOD WEB OF THE ROSS SEA, ANTARCTICA
average, recent year (1990–2000). The focus of the model is on the role of Antarctic toothfish in the food ... consistency. The model has 38 trophic groups and is balanced in terms of annual flows of organic carbon in an ... ) in trophic flows between groups. Parameters for biomass, production rate, growth efficiency, diet ... efficiency) and all groups together was 1.7%, and for diet fractions was 0.6%. Large but not implausible ...
Meeting Document : WG-EMM-09/42 : Autor(es): M.H. Pinkerton, J.M. Bradford-Grieve and S.M. Hanchet (New Zealand)