Search results
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KRILL DENSITY ESTIMATES IN CCAMLR SUBAREA 48.6 BASED ON ACOUSTIC DATA COLLECTED DURING JANUARY–MARCH 2008
Abstract: A multidisciplinary survey was conducted with the RV ‘G.O. Sars’ as part of the ... S in the sparsely studied CCAMLR subarea 48.6. The mean density of Antarctic krill, integrated to ... 270 m depth was 4.42 g/m2. The krill were mainly found in strong aggregations and were patchily ... distributed. The majority of the detected krill was distributed between 40 and 80 m depth, and approximately ...
Meeting Document : WG-EMM-09/45 : Author(s): G. Skaret, B.A. Krafft and R. Korneliussen (Norway)
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Review of research into seabird–fishery interactions
. The research was divided into five main groupings: a) estimation of bycatch; b) population estimation ... mitigation efficacy had been covered under a separate review (Bull, unpublished). The review was conducted to ... allow an assessment of the utility, current methodologies, and constraints of research into seabird ... biology and fishery interactions. Following from the findings of the review, recommendations were ...
Meeting Document : WG-FSA-05/42 : Author(s): R. Alderman (New Zealand)
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Seal mitigation measures on trawl vessels fishing for krill in CCAMLR Subarea 48.3
Abstract: At WG-EMM in Siena, 2004, the UK reported on the bycatch of fur seals in the krill ... fur seal deaths in the fishery. WG-EMM requested the UK to provide further details of the methods ... gazella) entanglements on krill vessels fishing around South Georgia in the 2004 fishing season. The ...
Meeting Document : WG-FSA-04/83 : Author(s): J. Hooper, J.M. Clark, C. Charman and D. Agnew (United Kingdom)
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Fishing patterns of Japanese krill trawlers
strategies, especially focusing on their movement in time and space. The operations were grouped into ... , 30nm, and 60nm). Distribution of the operation units showed considerable variation in space and time ... with the plots of aggregated catch, suggesting these two kinds of CPUEs may not be good indices for ... expressing the status of krill in the fishing ground. Catch per fishing days maybe the reasonable index for ...
Meeting Document : WG-EMM-02/28 Rev. 1 : Author(s): S. Kawaguchi, T. Kameda and Y. Takeuchi (Japan)
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Consideration of major issues in ecosystem monitoring and management
Abstract: The requirements of an ecosystem approach to management of Southern Ocean resources are ... outlined. This highlights the need for information on harvested and dependent species their interaction and ... the manner in which their populations vary naturally. Large scale interactions are catered for the ... Krill Yield Model. Smaller scale interactions centre around three main categories, the availability of ...
Meeting Document : WG-EMM-01/73 : Author(s): I. Everson (United Kingdom)
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Measurements of fish school velocities with an acoustic Doppler current profiler
), it was required that the four ADCP beams simultaneously insonified a fish school, in the same depth ... estimates and ensemble averaged to determine the average speeds and directions of fish aggregations. The ... results suggests that the ADCP can be a useful tool for observing fish behavior in certain situations ... . Some applications may include the quantification of horizontal and vertical migration patterns of large ...
Meeting Document : WG-EMM-96/41 : Author(s): Demer, D.A.
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IMPLEMENTATION OF CCAMLR OBSERVER PROGRAM ON KRILL FISHERIES
Abstract: The aim of this document is to serve as an objective guideline to decide on an ... appropriate observer coverage to understand overall behaviour and impact of the fishery. CCAMLR Observer data ... , together with haul-by-haul fine-scale data were used to identify the target SSMUs and the critical periods ... as baseline to evaluate the level of observer coverage needed to achieve the CCAMLR objectives. The ...
Meeting Document : TASO-09/07 : Author(s): Kawaguchi, S.
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Further analysis of target strength measurements of Antarctic krill at 38 and 120 kHz: comparison with deformed cylinder model and inference of orientation distribution
Abstract: Data collected during the krill target strength experiment [J. Acoust. Soc. Am. 87, 16 ... -24(1990)] are examined in the light of a recent zooplankton scattering model where the ... elongatedanimals are modeled as deformed finite cylinders [J. Acoust. Soc. Am. 86, 691-705 (1989)].Exercise of the ... be made at each frequency. By requiring that the differencebetween predicted and measured target ...
Meeting Document : WG-KRILL-93/06 : Author(s): D. Chu (USA), K.G. Foote (Norway) and T. K. Stanton (USA)
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Uncertainty in green weight estimates from Norwegian krill fishing vessels
an issue raised repeatedly within CCAMLR for a number of years, resulting in a modification to the C1 ... form implemented for the fleet in 2012. There are at present three Norwegian vessels operating in the ... krill fishery for Euphausia superba in the Antarctic. These vessels have in recent years contributed to ... 50-60 % of the total krill harvest, and reliable uncertainty estimates from these vessels will ...
Meeting Document : WG-EMM-13/41 : Author(s): G. Skaret and T. Knutsen (Norway)
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Determining toothfish otolith structure using oxytetracycline at South Georgia – a preliminary report
trawl surveys, experimental pot fishing and longline fishing. Some of the fish tagged on longliners in ... 2002 were injected with oxytetracycline (OTC) to mark the otoliths for age validation purposes. The ... otoliths of some of these chemically marked recaptures of the 2003 season were examined and the preliminary ... results are presented here. Two fish marked with strontium-chloride (SrCl2) during the 2002 trawl survey ...
Meeting Document : WG-FSA-03/80 : Author(s): M.G. Purves, M. Belchier, D.J. Agnew, G. Moreno and T.R. Marlow (United Kingdom)