Resultados de la búsqueda
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Towards an ecological risk assessment of krill fishing in East Antarctica (CCAMLR Divisions 58.4.1 and 58.4.2)
Abstract: With the recommencement of commercial krill (Euphausia superba) fishing in CCAMLR ... framework used in Area 48 to assess the risks involved in any redevelopment of a krill fishery and evaluate ... whether the current management procedure has a high likelihood of achieving CCAMLR’s objectives in this ... to allow the completion of a first risk assessment for the krill fishery in this region in the near ...
Meeting Document : WG-EMM-17/20 : Autor(es): N. Kelly, M. Cox, L. Emmerson, S. Kawaguchi, B. Raymond, C. Southwell and D. Welsford
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Entanglement of Antarctic fur seals (Arctocephalus gazella) in man-made debris at Signy Island, South Orkney Islands 1996/97
aboard vessels that was brought into force in 1996. The high incidence of synthetic line and fishing net ... with, regulations prohibiting the disposal of debris in the southern ocean. Author(s): Delegation of ... the United Kingdom Title: Entanglement of Antarctic fur seals (Arctocephalus gazella) in man-made ... Abstract: The results of the first annual survey of entanglement of Antarctic fur seals at Signy ...
Meeting Document : SC-CAMLR-XVI/BG/07 : Autor(es): Delegation of the United Kingdom
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Echo integration in low signal to noise regimes: methods of noise estimation and removal
Abstract: The results of acoustic surveys, especially in low signal-to-noise regimes, are ... sensitive to the method used to exclude the contribution of background noise from the acoustic data. The use ... of thresholds to reject weak signals during data collection is inappropriate because the noise ... contribution to the above-threshold-signal cannot later be removed in post processing. The only solution is to ...
Meeting Document : WG-EMM-97/74 : Autor(es): Higginbottom, I., Pauly, T.
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Annual variation in breeding biology of gentoo penguins, (Pygoscelis papua) at Bird Island, South Georgia
later in 1987, when the breeding population decreased markedly. Factors involved in the timing of ... varied annually, and with age of the breeding bird, nest location and, in one year, with laying date ... gazella, is suggested as the cause of consistently lower breeding success at one colony. Mean egg weight ... Abstract: The breeding biology of the gentoo penguin, Pygoscelis papua, was studied over a three ...
Meeting Document : WG-CEMP-90/38 : Autor(es): T.D. Williams (United Kingdom)
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Assessment models for Patagonian toothfish in research block 5843a_1 of Division 58.4.3a, Elan Bank
status assessments of Dissostichus eleginoides in research block 5843a_1 in Division 58.4.3a for the ... comprised of two fisheries split by depths of 1 200 m as the model in WG-SAM-14/17. Number of longlines was ... biomass (B 0) estimate. The MPD estimate of B 0 was 464 and 772 tonnes in R.0.1 and R.1 models ... generally based on those with the same names in WG-SAM-14/17 as follows: 1) R.0.1 model without tagging ...
Meeting Document : WG-FSA-14/22 : Autor(es): K. Taki (Japan)
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Performance assessment of underwater setting chutes, side setting and blue-dyed bait to minimize seabird mortality in hawaii longline tuna and swordfish fisheries – Final Report August 2003
, commercial viability, and practicality in the Hawaii pelagic longline fisheries. A seabird avoidance method ... called side setting, which entails setting gear from the side of the vessel, with other gear design the ... hooks 5.4m and 2.9m underwater, respectively, were used in this trial. The 9m chute had the second ... available, use of blue-dyed bait in combination with other methods, such as side setting and adequate line ...
Meeting Document : WG-FSA-03/36 : Autor(es): E. Gilman (USA), N. Brothers (Australia), D. Kobayashi, S. Martin, J. Cook, J. Ray, G. Ching and B. Woods (USA)
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Preliminary tag-recapture based population assessment of Antarctic toothfish in Subarea 48.4
Abstract: The stock of Antarctic toothfish (D. mawsoni) in CCAMLR subarea 48.4 is estimated from ... tagging returns to be 982 tonnes in 2018. Applying the CCAMLR agreed precautionary assumption of average ... biomass across the time series and harvest rate of γ = 0.038, implies a 2018/19 yield of 37 tonnes ... , unchanged from the 2017/18 catch limit. Historically, a precautionary approach has been applied in treating ...
Meeting Document : WG-FSA-18/26 : Autor(es): T. Earl and A. Riley
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Entanglement of Antarctic fur seals in man-made debris at Bird Island, South Georgia
Abstract: The incidence of entanglement of Antarctic fur seals (Arctocephalus gazella) in Man ... incidence of entanglement during the pup-rearing period was slightly higher than in the previous year (48 ... , respectively). Polypropylene straps (44%), of the type used in packaging bands, and fishing net fragments (27 ... -made debris at Bird Island, South Georgia, was monitored throughout the austral winter and summer of ...
Meeting Document : SC-CAMLR-XI/BG/09 : Autor(es): Delegation of United Kingdom
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Bias in acoustic biomass estimates of Euphausia superba Dana to diel vertical migration
study was collected in the vicinity of Elephant Island, Antarctica during the Austral Summer of 1992 ... Abstract: The diel vertical migration of Antarctic krill (Euphausia superba) can greatly bias the ... sonar and independent of the time of day. To demonstrate and quantify these negative biases on both the ... 60 by 35 n.mile area immediately north of Elephant Island; the fifth survey covered a 1 n.mi.2 area ...
Meeting Document : WG-KRILL-93/48 : Autor(es): D.A. Demer and R.P. Hewitt (USA)
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LETTER TO DRS REID, WATTERS AND JONES IN REGARD TO “DISAPPEARANCE OF TOOTHFISH FROM MCMURDO SOUND”
in the EMM submitted document, “Decline of the Antarctic toothfish and its predators in McMurdo Sound ... unequaled climate records and responses of the biota to climate change are in jeopardy of being compromised ... needs to be addressed without significant delay. Together we have worked in the Ross Sea and vicinity ... for more than 300 person-years, and in the process have gained considerable knowledge about the Ross ...
Meeting Document : WG-EMM-08/20 : Autor(es): D.G. Ainley, S.F. Ackley, K. Arrigo (USA), G. Ballard (New Zealand), J.P. Barry (USA), L. Blight (Canada), P. Broady, B. Davison (New Zealand), P. Dayton, A.L. DeVries, K. Dugger, J.T. Eastman, S.D. Emslie (USA), C. Evans (New Zealand), R.A. Garrott, G. Hofmann, S. Kim, G. Kooyman, S.S. Jacobs (USA), G. Lauriano (Italy), A. Lescroël (France), D.R. MacAyeal (USA), M. Massaro (New Zealand), S. Olmastroni (Italy), P.J. Ponganis (USA), E. Robinson (New Zealand), D.B. Siniff, W.O. Smith (USA), I. Sti