Resultados de la búsqueda
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Proposal for trials to test modified longline gear as a means to reduce cetacean depredation and mitigate incidental bird catch
conjunction with the observer’s report of that cruise (Basson 2006). Initial results were promising, and the ... ” longline configuration for mitigating cetacean interactions in 2006. This paper should be read in ... UK intends to proceed with further, more extensive trials, in the 2007/08 fishing season in Subarea ... 48.3. Although seabird interactions are expected to be minimal, the trials will stop if 3 seabirds are ...
Meeting Document : WG-FSA-07/31 : Autor(es): Delegation of the United Kingdom
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The US commercial krill fishery in Area 48: development, fishing patterns, and decision making
north of South Georgia; in 2001, all fishing was conducted off the South Shetland Islands and Bransfield ... concentrations of krill were found in Bransfield Strait in 2001 while fishing inside the ice edge. The success of ... . Increasing catch rates with time are likely related to the experience of the Captain, as opposed to indices ...
Meeting Document : WG-EMM-02/18 : Autor(es): C.D. Jones and M. Hull (USA)
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A review of conversion factors used in CCAMLR toothfish fisheries
be required to better understand the sources of this variability. The results suggest that a ... integral to the reporting of catches and reconciling those catches with data reported via the CDS. This ... that might influence those conversion factors. There was considerable inter-vessel variability as well ... persisted even within the same processing code, suggesting that more details on the processing methods may ...
Meeting Document : WG-FSA-15/02 : Autor(es): CCAMLR Secretariat
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Characterising the preferred at-sea habitats used by chinstrap penguins and the fishery for Antarctic krill: slow-flowing, nearshore waters over shallow bathymetry
. Nevertheless, we conclude that these models can, with some confidence, be extrapolated to predict the foraging ... , we report that chinstrap penguins prefer habitats with slow-flowing, nearshore waters over shallow ... Abstract: We show that the preferred habitat models developed by Warwick-Evans et al. (2017) for ... chinstrap penguins breeding at the South Orkney Islands, can be modified to predict the at-sea distribution ...
Meeting Document : WG-EMM-17/34 : Autor(es): P.N. Trathan, V. Warwick-Evans, J. Hinke, E.F. Young, A.P.B. Carneiro, M.P. Dias, K. Kovacs, O.R. Godø and M. Santos
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A method for inferring movement rates of fish from mark–recapture data
, which includes uncertainty that can readily be integrated into a population simulation. If the goal of ... simpler approaches that might be useful. For instance, one alternative would be to ask how much time is ... unmarked fish in that location. Clearly this may be related to the distance from the release point, but ... Abstract: This paper presents methods to infer the rate of movement of fish that are marked ...
Meeting Document : WG-FSA-05/66 : Autor(es): C. Wilcox (Australia)
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Developing research on Antarctic krill to facilitate the development and updating of feedback management procedures
types of data that can be realistically obtained and monitored on the productivity of the ecosystem and ... (www.iced.ac.uk). Here we report on planned and proposed ICED activities that are relevant to krill that will be ... of interest to CCAMLR scientists and suggest that development of future joint activities would be of ... Abstract: Antarctic krill fisheries have the potential to be in the top 10 fisheries of the world ...
Meeting Document : WG-EMM-13/12 : Autor(es): E.J. Murphy, R.D. Cavanagh (United Kingdom), A. Constable (Australia), E.H. Hofmann (USA), S.L. Hill, N.M. Johnston, P.N. Trathan and J.L. Watkins (United Kingdom)
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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 : Autor(es): 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 : Autor(es): 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 : Autor(es): 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 : Autor(es): D.C. Welsford, A.J. Constable and G.B. Nowara (Australia)