Résultats de la recherche
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The direct impact of fishing and fishery-related activities on marine life in the CCAMLR Convention Area with particular emphasis on longline fishing and its impact on albatrosses and petrels – a review
Abstract: Finfishing started in the Southern Ocean more than 30 years ago at South Georgia and ... Iles Kerguelen. The fishery extended further south for a few years in the second half of the 1970' ... until 1996/97 when the longline fisheries for Dissostichus eleginoides spread over most of the Southern ... Ocean within one season. A number of direct effects from fishing activities can be seen on marine life ...
Meeting Document : SC-CAMLR-XIX/BG/11 : Auteur(s): Delegation of Germany
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A multi-frequency method for improved accuracy and precision of in situ target strength measurements
Abstract: The effectiveness of a split-beam echosounder system to delineate single scatterers and ... synchronized signals from two or more adjacent split-beam transducers of different frequencies. The accuracy of ... from one of the split-beam transducers, additional corresponding TS measurements can be collected with ... juxtaposed single-beam transducers. Both methods were utilized to extract in-situ TS measurements of ...
Meeting Document : WG-EMM-97/24 : Auteur(s): Hewitt, R.P., Soule, M.A., Demer, D.A.
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Hook selectivity in the longline fishery of Dissostichus eleginoides (Nototheniidae) off the Chilean coast
fisheries of the patagonian toothfish Dissostichus eleginoides related with the selectivity of the type and ... size of hooks used in the longlines. Original data obtained during 1991 on the coast of Valdivia, South ... . The size frequency of the population collected with straight hooks No3 and 4 are not significatively ... differences. It is notorious that female proportion increases significatively in the catches, at the same time ...
Meeting Document : WG-FSA-91/11 : Auteur(s): C.A. Moreno (Chile)
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Estimation of the 2011 catch limit for mackerel icefish (Champsocephalus gunnari) in Subarea 48.3 using a length-based population dynamics model
estimated numbers at length derived from survey length density and biomass density data, removing the need ... . Application of the harvest control rule ensuring 75% escapement after a two year projection period yielded a ... total allowable catch of 2349 tonnes. Author(s): C.T.T. Edwards, R.E. Mitchell, J. Pearce and D.J ... . Agnew (UK) Title: Estimation of the 2011 catch limit for mackerel icefish (Champsocephalus gunnari) in ...
Meeting Document : WG-FSA-10/37 : Auteur(s): C.T.T. Edwards, R.E. Mitchell, J. Pearce and D.J. Agnew (UK)
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The use of net monitoring cable in trawl fishery for krill
Abstract: Based on the discussion at EMM 2016 we here present challenges, results and potential ... of using a net cable to inform crew and scientists on trawl performance. Some results from ongoing ... tests demonstrate its potential in allowing observations of trawl in relation to krill distribution and ... behaviour, including real time imaging of krill and predator behaviour in relation to fishing gear during ...
Meeting Document : WG-EMM-17/47 : Auteur(s): O.R. Godø
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Methodological aspects of the International Synoptic Krill Survey in Area 48, 2019
survey and the 2019 synoptic survey were considered. These were 1) the effect of acoustic surveying at ... Abstract: The effect of differences in the methodology used for the CCAMLR 2000 krill acoustic ... effect of krill discrimination method. Surveying during the day only produced a 6% increase in the ... distributions. The choice of krill discrimination method had a marked effect on the per-stratum biomass ...
Meeting Document : SG-ASAM-2019/10 : Auteur(s): G. Macaulay, G. Skaret, T. Knutsen and B. Krafft
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Interannual variation to the gonad cycle of the mackerel icefish
sampling the commercial fishery. Spawning appears to occur at the same time each year, but the timing of ... maturation cycle is also closely tracked to the time of year. The gonad maturation cycle of the mackerel ... gonadal development is subject to a considerable inter-annual variation. The implications of this ... . Kock (Germany) and J. Ellison (United Kingdom) Title: Interannual variation to the gonad cycle of the ...
Meeting Document : WG-EMM-00/45 : Auteur(s): I. Everson (United Kingdom), K.-H. Kock (Germany) and J. Ellison (United Kingdom)
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Report on recent French catches of sea pens (Pennatulacea) in Lena Bank (CCAMLR sector 58.4.4b)
Abstract: Important catches of sea pens (Pennatulacea, NTW) in the 58.4.4b sector (Lena bank ... ) have been reported during the CCAMLR SAM Working Group 2018 (see WG-SAM-18/31 "Annual report of ... research fishing operations at Division 58.4.4b in 2016/17 fishing season" by Japanese and French ... delegations). Detail of French catches, with abundances and weights are provided here (Tab.1). Data and ...
Meeting Document : WG-FSA-18/23 : Auteur(s): A. Martin, J. Blettery and M. Eléaume
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Annual migrations of pelagic fish stocks into a krill hotspot
frequency response may be similar to that of krill at the commonly used frequencies of 38 and 120 kHz ... Abstract: We report here on the existence of seasonal fish migrations into a krill hotspot ... from krill on a single frequency. Trawl catches in the area during 2019 gave high densities of mackerel ... . Author(s): T. Klevjer Title: Annual migrations of pelagic fish stocks into a krill hotspot Approval ...
Meeting Document : WG-EMM-2019/33 : Auteur(s): T. Klevjer
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Summary of incidental mortality associated with fishing activities collected in scientific observer and vessel data during the 2019 season
seal morality event which occurred at the end of the 2018 season. Incidental mortality numbers for ... Abstract: This paper summarises data collected by Scheme of International Scientific Observation ... observers and vessels, of incidental interactions between fishing vessels, seabirds and marine mammals ... number of birds killed is 103. Author(s): CCAMLR Secretariat Title: Summary of incidental mortality ...
Meeting Document : WG-FSA-2019/16 Rev. 2 : Auteur(s): CCAMLR Secretariat