Résultats de la recherche
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Spatial scales of benthic invertebrate habitats from fishery by catch and video transect data in the Ross Sea region
these data allows the detectability of sponges and gorgonian corals to be estimated, along with changes ... collected for two fishing seasons, with 4728 longline segments observed. Several regions with consistent ... with no evidence of sponge or gorgonian presence. Identifiable sponge and/or gorgonian habitats ... in catch rate at different densities. Results indicate that sponge patches are detected more than 70 ...
Meeting Document : WG-EMM-10/28 : Auteur(s): S.J. Parker, R.G. Cole and S.M. Hanchet (New Zealand)
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Variability of krill fishery operations in Subarea 48.2 in relation to fishing methods: spatial–temporal distribution of CPUE and of fishing efforts
in Subarea 48.2 with special attention to the period 2006-2011 which is characterized by the highest ... fishing methods. It was shown how fishery operated by years and month in each SSMUs with special attention ... to differences between national fleets. Our results provide the evidence that ‘high CPUE’ regime’ in ... 2006-2011 is not associated with the changes in fishing methods and the trend in long-term fishery in ...
Meeting Document : WG-EMM-14/22 : Auteur(s): S. Kasatkina (Russia)
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Modelling the predator–prey interactions of krill, baleen whales and seals in the Antarctic ecosystem
that has become available since the postulate was first advanced is discussed. The objective of the ... and the assumptions on which they are based is discussed, together with suggested further areas for ... investigation. Amongst the key inferences of the study are that: i) species interaction effects alone can ... consider other species in addition to baleen whales and krill only to explain observed trends, with ...
Meeting Document : WG-EMM-05/34 : Auteur(s): M. Mori and D.S. Butterworth (South Africa)
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Solutions to seabird by-catch in Alaska’s demersal longline fisheries
years, regions, and fleets (88% to 100% relative to controls with no deterrent), despite the fact that ... suite of bycatch mitigation measures. Among all deterrents tested, paired streamer lines proved to be ... adjustment as physical conditions changed. Functionally, paired streamer lines created a moving fence that ... precluded seabird attacks. Most significantly, this success came with no consequence to catch rates of ...
Meeting Document : WG-FSA-01/35 : Auteur(s): E.F. Melvin, J.K. Parrish, K.S. Dietrich and O.S. Hamel (USA)
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An investigation of integrated stock assessment methods for the Patagonian toothfish (Dissostichus eleginoides) in Division 58.5.2 using CASAL
al. (2006), but with a recognition that some age classes are only partially selected in these surveys ... show that an integrated assessment for Dissostichus eleginoides in Division 58.5.2 seems tractable. The ... recruitment series derived from surveys has similarities with the recruitment series estimated by Welsford et ... fishing selectivities. The uncertainty arising from this tension will need to be explored further in order ...
Meeting Document : WG-FSA-SAM-06/14 : Auteur(s): A. Constable, S. Candy and I. Ball (Australia)
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Research plan for toothfish in Division 58.4.4a & b by Shinsei Maru No. 3 in 2013/14
stating that the sensitivity run of the CASAL model should be made by using levels of IUU ranging from ... CASAL_base model includes estimated variability of YCS for the period from 1989 to 2005, and assumed that a ... modified Lincoln-Petersen (446 tonnes). The catch and tagging data in SSRU D were not enough to be applied ... estimated only by using CPUE comparison with the stock size estimates in SSRU C obtained from each method ...
Meeting Document : WG-SAM-13/21 : Auteur(s): Delegation of Japan
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INGESTION OF FISHING GEAR AND ENTANGLEMENTS OF SEABIRDS: IMPLICATIONS FOR MONITORING AND MANAGEMENT
corresponding with a substantial increase in the number of multifilament snoods (gangions), suggesting that the ... of a 16 year dataset collected at Bird Island indicated that the amount of gear found in association ... with wandering albatross colonies was an order of magnitude greater than in any other species ... , reflecting their wider foraging range and larger gape. Unlike other taxa, most gear associated with grey ...
Meeting Document : WG-IMAF-09/10 : Auteur(s): R.A. Phillips, C. Ridley, N. Harrison (United Kindom), K. Reid (Secretariat), G.N. Tuck (Australia) and P.J.A. Pugh (United Kingdom)
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Incidental mortality of seabirds and marine mammals during longline fishing around the Falkland/Malvinas Islands
Abstract: Data on incidental mortality of seabirds and marine mammals associated with longline ... fishing around the Falkland Islands between August 1996 and May 1997 are briefly summarised. For seabirds ...
Meeting Document : WG-FSA-97/21 : Auteur(s): Cielniaszek, Z., Croxall, J.P.
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Preliminary assessment of the South Georgia toothfish stock, 2007
be considered, and that the toothfish assessment is undertaken at periods of greater than one year ... Abstract: 1. The catch-at-length based CASAL model for toothfish at South Georgia is updated with ... data that tag-induced growth retardation is also related to size, smaller fish suffering less growth ... retardation than larger fish, and that on average it is 1 year or more. 3. A new model is developed which uses ...
Meeting Document : WG-FSA-07/29 : Auteur(s): D.J. Agnew, R. Hillary and J. Pearce (United Kingdom)
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Krill population dynamics in the Scotia Sea: variability in growth and mortality within a single population
Abstract: Understanding the demographics of Antarctic krill over large scales may be complicated ... by regional differences in the 11 processes that govern population structure. The influence of ... modal size classes that was not present 15 in the raw data. Optimising the mortality rate, to minimise ... rate at South Georgia that the South Shetlands. The intra-specific variations in growth and mortality ...
Meeting Document : WG-EMM-02/16 : Auteur(s): K. Reid, E.J. Murphy (United Kingdom), V. Loeb and R.P. Hewitt (USA)