Resultados de la búsqueda
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Age/length key for Champsocephalus gunnari from South Georgia; Hill Cove survey, January 1990
Abstract: Discrepancy was noted between the age length key and modes in the length distribution ... of Ch. gunnari from the Hill Cove survey around South Georgia in January 1990. A revised age length ... key for this survey is proposed, based on data from a previous survey in the area. The revised age ... length key corresponds well to modes in the length distribution from the survey and to another key ...
Meeting Document : WG-FSA-91/18 : Autor(es): G. Parkes (United Kingdom)
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Analysis and modelling of the Soviet Southern Ocean krill fleet, II: Estimating the number of concentrations and analytical justification for search data
Abstract: In this paper, I show how data that are routinely collected by survey vessels can be ... used to estimate the number of Concentrations of krill (in the sense of Butterworth (1988), Mangel ... (1988)) in a given region of the southern ocean. Sample computations are performed, using data collected ... by Soviet research/survey vessels in the early 1980s. These examples highlight the need for a ...
Meeting Document : WS-KCPUE-89/06 : Autor(es): M. Mangel (South Africa)
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Potential for using CCAMLR VMS data for compliance analysis and data quality assurance
Abstract: In response to a request from the Scientific Committee the Secretariat has initiated a ... process to utilise VMS data for data-quality assurance in relation to catch data. This represents a change ... in focus on the use of VMS data by CCAMLR and requires a contingent change in emphasis on data ... quality assurance processes in order to ensure that the VMS can be used with an appropriate degree of ...
Meeting Document : SC-CAMLR-XXXIV/BG/19 : Autor(es): CCAMLR Secretariat
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OPTIONS FOR USING UNREPLICATED ECOSYSTEM MONITORING DATA TO DETECT IMPACTS
. Furthermore, CEMP data cannot be used in a standard environmental impact assessment framework as they lack ... control sites. Identifying how these data could be used in an ecosystem management strategy is therefore ... and a schedule of tactical interventions in response to these impacts (e.g. restrictions on fishing ... either assess the expected probability of an observed value in an unimpacted system, or they assess the ...
Meeting Document : WG-EMM-09/26 : Autor(es): S. Hill, J. Forcada, P. Trathan and C. Waluda (United Kingdom)
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Krill fishery report: 2007 update
for krill in Area 48 in the 2006/07 season, and these vessels have taken 61876 t of krill to date. Two ... the season is approximately 111746 t. This compares with 106589 t of krill reported in the STATLANT ... overlap between the krill fishery and krill predators; Consideration of the Conservation Measures in force ... in the fishery. Reference information on stock and areas, and parameters used in stock assessment are ...
Meeting Document : WG-EMM-07/05 : Autor(es): Secretariat
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The diet of Antarctic fur seals, Arctocephalus gazella, at King George Island, during the summer–autumn period
, krill and fish were the most frequent prey, occurring in an average of 97% and 69% of samples (n=128 ... fish species associated with krill swarms. A seasonal change observed in the relative proportions of ... the different fish prey taxa would indicate that fur seals spent more time foraging over the shelf in ... summer and off shelf in autumn. During the study period commercial fishing in the area was not based upon ...
Meeting Document : WG-EMM-04/4 : Autor(es): G.A. Daneri, A.R. Carlini, C.M. Hernandez and A. Harrington (Argentina)
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By-catch of fish during a 1995/96 deep-sea longline experimental fishing cruise off the Kerguelen Islands (Division 58.5.1)
Abstract: An experimental longline fishing cruise targetting D. eleginoides has been realised in ... total catch in number. The grenadier Macrourus carinatus and two species of skates Bathyraja eatonii and ... Bathyraja irrasa are the dominant species in the by-catch. The morid Antimora rostrata is also a common by ... and bathymetrical differences in the by-catch species distribution is noted. The mean abundances ...
Meeting Document : WG-FSA-96/36 : Autor(es): Pruvost, P., Duhamel, G.
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The ecosystem approach to managing fisheries: achieving conservation objectives for predators of fished species
Abstract: Managing fisheries to achieve ecosystem objectives is in its infancy. A general ... approach for maintaining ecological relationships and providing for the recovery of depleted populations in ... taking the ecosystem approach in managing fisheries: (i) how might fisheries impact incidentally on an ... account of uncertainties in knowledge of the structure of ecosystems. Estimates of production arising ...
Meeting Document : WG-EMM-12/P04 : Autor(es): A.J. Constable
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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)
Abstract: Scientific observers aboard vessels in the Australian fisheries in 58.5.2 have ... collected Dissostichus eleginoides otoliths since the fishery commenced in the 1996/97 season. This program ... has yielded data which has assisted with understanding age structure and growth rates of toothfish in ... 21000 otoliths have been collected from toothfish in 58.5.2, and more than 2500 otolith pairs have been ...
Meeting Document : WG-FSA-07/45 : Autor(es): D.C. Welsford and G.B. Nowara (Australia)
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Light levels experienced by foraging Antarctic fur seals, Arctocephalus gazella
(Arctocephalus gazella) at Bird Island, South Georgia (54° 00' S 38° 02' W) in the 1994/5 austral ... to minimum starlight (10-6 lux) at night and during deep daytime dives. The change in il1uminance ... with depth did not follow a simple exponential decrease as recorded in clear oceanic waters. TDRs ... recorded strong light attenuation in the top 50 m of the water column. The mean attenuation coefficient was ...
Meeting Document : WG-EMM-99/28 : Autor(es): D.J. McCafferty, I.L. Boyd and T.R. Walker (UnitedKingdom)