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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 : Autor(es): 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 : Autor(es): 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 : Autor(es): 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 : Autor(es): G. Skaret and T. Knutsen (Norway)
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Progressing towards responsible, science-based and highly precautionary krill fisheries management
Abstract: Improving the management of the krill fishery is a key priority for ASOC. In this paper ... , we recommend several key actions that CCAMLR should take to ensure that management of the krill ... fishery remains highly precautionary and protects the needs of the full range of krill predators ... . Obtaining up to date krill biomass estimates, reviewing the CCAMLR Ecosystem Monitoring Program, reviewing ...
Meeting Document : SC-CAMLR-XXXVI/BG/31 : Autor(es): Submitted by ASOC
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Bottom fishing in high-seas areas of CCAMLR
Abstract: This paper considers the relationship between bottom fisheries, benthic habitats and ... eliminated in the CCAMLR Area. It defines “destructive fishing practices” and proposes a process for ... addressing these issues, including (i) methods for evaluating the interactions between bottom fisheries and ... marine habitats, and (ii) the management of bottom fisheries within CCAMLR and whether destructive ...
Meeting Document : SC-CAMLR-XXVI/10 : Autor(es): Delegations of Australia and the USA
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Sampling toothfish from longlines with unequal probabilities
Abstract: To obtain a representative sample of the catch taken by toothfish longliners, CCAMLR ... observers are recommended to sample a quota of the first 30 fish that are caught during a sampling session ... proportion to toothfish density on the line. The present recommendation therefore indicates sampling with ... vital rates. To resolve this, either the probabilities need to be incorporated in the analysis of ...
Meeting Document : WG-FSA-03/85 : Autor(es): J.R. Ashford (USA)
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FISHING INDUSTRY POLLUTION OBSERVATIONS AND ASSOCIATED MARINE MAMMAL ENTANGLEMENT RECORDS AT SOUTH GEORGIA, SUMMER 1996/97
Abstract: From various locations on or near the mainland of South Georgia, between November 1996 ... . Of the fur seals five (42%) were female (three adult, two juvenile) and seven (58%) were male (one ... . Marine debris was collected from a 1 km stretch of beach on the south coast of South Georgia between 24 ... -26 December 1996. The photographs (originals in colour) illustrate the diversity of debris, most ...
Meeting Document : CCAMLR-XVI/BG/26 : Autor(es): Delegation of the United Kingdom
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REFERENCE OBSERVATIONS FOR VALIDATING AND TUNING OPERATING MODELS FOR KRILL FISHERY MANAGEMENT IN AREA 48
proposed models to evaluate krill catch allocation options for Area 48 (the SAM calendar). The observations ... translate these observations into numerical terms (the numerical calendar). We provide spatially-resolved ... reference points for the density of krill, and the abundance of “generic” seals, penguins and whales in 1970 ... than that suggested by WG-SAM, so the numerical calendar for this taxon deviates from the SAM calendar ...
Meeting Document : WG-EMM-08/10 : Autor(es): S. Hill (United Kingdom), J. Hinke (USA), É. Plagányi (South Africa) and G. Watters (USA)
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Finfish research proposals for Subarea 48.6 by Koryo Maru 11 for 2012/13 (this is a revision of WG-SAM-12/12)
Abstract: This paper presents a revised plan for research fishing by the Koryo Maru 11 for the ... 2012/13 fishing season, and revises and replaces WG-SAM-12/21. The proposed research fishing is ... conducted by OLRAC-SPS (2012) – tabled at WG-FSA-12 as a separate paper. The research plan presented here ... draws on the results presented by OLRAC-SPS (2012) and addresses knowledge gaps highlighted by that ...
Meeting Document : WG-FSA-12/30 : Autor(es): C. Heiniken and R. Ball (South Africa)