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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 : Autor(es): 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 : Autor(es): Demer, D.A.
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Reduced bait loss and bycatch of seabirds in longlining by using a seabird scarer
, bycatch of seabirds on longlines is a problem in certain seasons and areas. Birds feeding on the bait ... during setting of the gear might cause considerable bait loss and occasional hooking of birds might ... eventually give high mortalities considering the large amounts of hooks used. Both from a fishery and bird ... a seabird scarer in the Norwegian longline fishery. The scarer, a line with streamers trailing ...
Meeting Document : WG-IMALF-94/09 : Autor(es): S. Løkkeborg and Å. Bjordal (Norway)
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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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Annual migrations of pelagic fish stocks into a krill hotspot
Abstract: We report here on the existence of seasonal fish migrations into a krill hotspot ... , utilized both by central place foragers and the industry. We do not have trawl samples overlapping with the ... acoustic data, but the behaviour displayed suggests that the fish are planktivorous. Furthermore, the ... from krill on a single frequency. Trawl catches in the area during 2019 gave high densities of mackerel ...
Meeting Document : WG-EMM-2019/33 : Autor(es): T. Klevjer
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Ross Sea Environment and Ecosystem Voyage 2019
Abstract: New Zealand carried out a 40-day voyage to the Ross Sea from 8 January to 16 February ... 2019 using the research vessel Tangaroa. The purpose of this multi-disciplinary research voyage was to ... increase knowledge about key environmental and biological processes in the Ross Sea region of Antarctica ... and the Southern Ocean, and thereby improve understanding of ecosystem function and likely responses ...
Meeting Document : WG-EMM-2019/38 : Autor(es): R.L. O’Driscoll, D. Bowden and M.H. Pinkerton
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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