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Beach debris survey – Main Bay, Bird Island, South Georgia 1998/99
310. Nylon line, identical to that attached to longline gear, accounted for 51 % of items.The lower ... remain at least three times the level of the early 1990039;s and provide continued cause for concern ... , suggesting that CCAMLR needs to enhance its campaign to reduce the amount of man-made debris being jettisoned ...
Meeting Document : SC-CAMLR-XIX/BG/05 : Автор(ы): Delegation of the United Kingdom
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Interim protocol for fish/fish larvae by-catch observation in krill fishery
images. It is also designed so that the data can be validated later by using randomly kept samples by the ... Abstract: This interim protocol has been developed in cooperation with our UK and Japanese ... -catch observation among observers and vessels so that we can later use it for quantitative analysis. The ... fish identification can also be verified by the CCAMLR fish experts by using systematically archived ...
Meeting Document : WG-EMM-07/25 : Автор(ы): S. Kawaguchi (Australia)
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Penguin foraging behavior in relation to the distribution of prey
) was measured concurrently with a hydroacoustic assessment of the vertical distribution and abundance ... and deeper during the day. Penguin foraging effort was found to be concentrated around noon and ... midnight, with a reduction in effort around dawn and dusk (local apparent time). The mean and maximum depth ... that penguins do not require extremely dense aggregations of prey in order to successfully capture ...
Meeting Document : WG-KRILL-93/47 : Автор(ы): D.A. Croll, R.P. Hewitt, D.A. Demer and J.K. Jansen (USA)
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Review of the use of survey data and length-at-age models in the assessment of Dissostichus eleginoides in the vicinity of Heard Island and McDonald Islands (Division 58.5.2)
estimates of length density, we suggest that best estimates of cohort abundance will be achieved when ... estimates were found to be most sensitive to the estimated recruitment series interacting with the estimate ... assignment of survey data to the 2003 stratification along with the latest estimates of length at age. The ... cohorts assumed to be represented in the length density data. Assuming survey design produces unbiased ...
Meeting Document : WG-FSA-SAM-06/15 : Автор(ы): D.C. Welsford, A.J. Constable and G.B. Nowara (Australia)
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A spatially explicit population dynamics operating model for Antarctic toothfish in the habitable depths of the Ross Sea region
to date. We propose that the modelling platform presented here can be used to test the likelihood and ... compare with previous models where the stock was either restricted to the fished cells only (65 cells ... the one that restricts toothfish distribution to depths which are known to provide suitable toothfish ... about the distribution of toothfish in areas where no fishing has occurred, such that the unrestricted ...
Meeting Document : WG-FSA-13/53 : Автор(ы): S. Mormede, A. Dunn, S. Parker and S. Hanchet (New Zealand)
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Estimates of the tag loss rates for single and double tagged toothfish (Dissostichus mawsoni) fishery in the Ross Sea
plausible that there could be a catastrophic failure of tags or some other systematic change in the tag loss ... and subsequently recaptured fish suggested that the loss rate was about 3.5% (95% C.I.s 0.020–0.054 ... models suggested that there was evidence of immediate failure of tags (α = 0.035) and an ongoing constant ... applied in the assessment models of Dunn & Hanchet (2009a, 2009b), with the loss rates slightly over ...
Meeting Document : WG-SAM-11/18 : Автор(ы): A. Dunn, M.H. Smith (New Zealand), D.J. Agnew (UK) and S. Mormede (New Zealand)
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Вспомогательный научный документ в поддержку создания МОР АНТКОМ в море Уэдделла (Антарктика) – версия 2015 г.
, preliminary version 2015). A further developed document will be presented to WG-EMM in 2016 with a view for ... the development of a marine protected area in the Weddell Sea planning area. In accordance with the ... /BG/15, /BG/16 and /BG/17). The Scientific Committee is invited to note that: Parts A and B of this ... scientific background are finalised, subject to final editorial corrections and changes; Part C will be ...
Meeting Document : SC-CAMLR-XXXIV/13 : Автор(ы): Delegation of Germany
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Analyses of acoustic line-transect data from the waters around South Georgia: estimation of krill (Euphausia superba Dana) biomass
various definitions of strata. The total biomass in the area of 155 786 km2 was estimated to be 1.8225 x ... 106 t (Coefficient of Variation = 9.5%). This gives an estimate of mean density throughout the region ... of 11.7 t km-2. Although the estimate of the mean is not sensitive to the definition of strata, the ...
Meeting Document : WG-KRILL-91/30 : Автор(ы): E. Murphy, I. Everson and A. Murray (United Kingdom)
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IN SITU MEASUREMENTS OF TILT ANGLE DISTRIBUTION AND TARGET STRENGTH IN ANTARCTIC KRILL (EUPHAUSIA SUPERBA)
data acquired. The post-processing and analyses are ongoing and the results from this work will be ... presented in future reports. Author(s): G. Skaret, S.A. Iversen, T. Knutsen, R.J. Korneliussen, E. Ona, R ... . Pedersen, A. Totland, T. Torkelsen (Norway) and X. Zhao (China) Title: IN SITU MEASUREMENTS OF TILT ANGLE ...
Meeting Document : WG-EMM-08/29 : Автор(ы): G. Skaret, S.A. Iversen, T. Knutsen, R.J. Korneliussen, E. Ona, R. Pedersen, A. Totland, T. Torkelsen (Norway) and X. Zhao (China)
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The Ross Sea toothfish fishery: proposal for conditional transition of classification from exploratory to established
uncertainties with aspects of the stock, we propose that the stock is sufficiently well understood and assessed ... that it should be re-classified. To ensure that sufficient data are acquired to continue assessment of ... ’ has led to the widespread misconception that little information is available for this stock, and that ... be undertaken. In fact, many biological characteristics of D. mawsoni are now well understood, and ...
Meeting Document : WG-FSA-11/32 : Автор(ы): C. Jones (USA) and S. Hanchet (New Zealand)
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