Résultats de la recherche
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Is our attempt to estimate biomass of Antarctic fish from a multi-species survey appropriate for all targeted species? Notothenia rossii in the Atlantic Ocean sector – revisited
this species was one of the first conservation measures CCAMLR adopted in 1985. Fish biomass within a ... CCAMLR Subarea or part of a subarea is commonly estimated targeting a number of species including N ... violated in the case of N. rossii which shows an abundance which is extremely skewed in that a large ... acoustic survey combined with a number of identification hauls might be the most promising approach to ...
Meeting Document : WG-FSA-03/12 : Auteur(s): K.-H. Kock (Germany), M. Belchier (United Kingdom) and C.D. Jones (USA)
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Preliminary results of a feeding trial on the blue-eyed shag Phalacrocorax atriceps
Abstract: Local fish species were used to feed a captive blue-eyed shag Phalacrocorax atriceps ... otolith-lengths. The shag produced a total of 16 pellets, with a frequency of 1 every 2.5 days. It ... ingested willingly a mean ration equivalent to 31% of its mass, which is a higher energy requirement than ... -Oro and P. Silva (Argentina) Title: Preliminary results of a feeding trial on the blue-eyed shag ...
Meeting Document : WG-CEMP-94/29 : Auteur(s): R. Casaux, M. Favero, E. Barrera-Oro and P. Silva (Argentina)
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Towards a Minimum Realistic Model for investigating trophic relationships between Antarctic toothfish and demersal fish in the Ross Sea, Antarctica
Abstract: We report on progress towards developing a Minimum Realistic Model for investigating ... in the Ross Sea, Antarctica. These demersal fish are known to form a part (in some cases a ... substantial part) of the diet of Antarctic toothfish of a size commonly taken by the Ross Sea fishery and are ... and toothfish. A Minimum Realistic Model is the most appropriate modeling approach to investigate what ...
Meeting Document : WG-SAM-10/21 : Auteur(s): M.H. Pinkerton, S. Mormede and S.M. Hanchet (New Zealand)
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A review of methodologies aimed at avoiding and/or mitigating incidental catch of protected seabirds.
fisheries interactions have been released in a variety of local, national and international media. Recent ... published reviews in the field of bycatch mitigation have typically had a species or fishing method focus ... . This report presents the results of the seabird component of a global review of mitigation methods ... influencing the appropriateness and effectiveness of a mitigation device include the fishery, vessel, location ...
Meeting Document : WG-FSA-05/P8 : Auteur(s): Bull, L.
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A method for inferring movement rates of fish from mark–recapture data
time is known. The simplest approach is to make a frequency plot of the distance between each release ... being able to allow a much richer description of movement than is available with the frequency of ... distances approach. In addition, it also provides a way to generate a movement model that is parameterized ... , which includes uncertainty that can readily be integrated into a population simulation. If the goal of ...
Meeting Document : WG-FSA-05/66 : Auteur(s): C. Wilcox (Australia)
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Longline sink rates on a bottom autoline vessel in New Zealand: draft
Abstract: Longline sink rates were investigated using Time Depth Recorders on a bottom autoline ... a method of accelerating line sink rate and thus avoiding incidental capture of seabirds. A new ... the middle of an unweighted longline of this design sinks to 10m in a mean time of 63.0 seconds (n ... = 11, c.v. 16.7%), compared with the start of the longline which takes a mean time 31.1 seconds (n = 11 ...
Meeting Document : WG-FSA-98/51 : Auteur(s): N.W. McL. Smith (New Zealand)
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A CHARACTERISATION OF THE TOOTHFISH FISHERY IN SUBAREAS 88.1 AND 88.2 FROM 1997–98 TO 2007–08
catch was the fourth highest on record with a total of 2666 t against a combined catch limit of 3207 t ... . The management of the SSRUs within the two subareas was changed for the 2006 season as part of a 3 ... season, primarily as a result of the ice conditions. The length frequency data from the Ross Sea fishery ... overall length frequency distribution, and no evidence for a reduction in fish length in any SSRU over ...
Meeting Document : WG-FSA-08/22 : Auteur(s): M.L. Stevenson, S.M. Hanchet and A. Dunn (New Zealand)
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Further development of a spatially explicit population dynamics operating model for Antarctic toothfish in the Ross Sea region
model for Antarctic toothfish over the entire Ross Sea region, for a medium scale spatial resolution ... (189 spatial cells) covering the Ross Sea region. The model was developed as a generalised Bayesian ... population dynamics model implemented using the Spatial Population Model software (SPM), and a single sex age ... also recommend a survey of the assumed spawning grounds during winter, and the controlled collection of ...
Meeting Document : WG-SAM-13/35 : Auteur(s): S. Mormede, A. Dunn, S. Parker and S. Hanchet (New Zealand)
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Key considerations for planning a large-scale krill survey
) might also play a role in the future management of the krill fishery. Such surveys provide an indication ... scientific working groups. We identify the key components of a large-scale survey and the key technical and ... resource issues that must be addressed. We suggest that CCAMLR’s working groups should establish a process ... important in the future management of the krill fishery. The design of the CCAMLR 2000 survey might be a ...
Meeting Document : WG-EMM-15/27 : Auteur(s): S. Hill, J. Watkins (United Kingdom), O.R. Godø (Norway), S. Kawaguchi (Australia), D. Kinzey, C. Reiss (USA), V. Siegel (Germany), P. Trathan (United Kingdom) and G. Watters (USA)
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Scientific contribution to the 2016 review of Conservation Measure 51-07: Part 1 – rationale, method and data for a risk assessment framework for distributing the krill trigger level
undertaken to further develop a risk assessment approach to spatially subdivide the trigger level through an ... overall risk of localised effects on predators can also be calculated for a known or nominated ... critical times. This paper provides the first part of a contribution to the required review of CM51-07 in ... 2016 and provides a risk assessment method for distributing the trigger level to reduce the risk of ...
Meeting Document : WG-FSA-16/47 Rev. 1 : Auteur(s): A. Constable (on behalf of the e-group on CM 51-07 WG-EMM review)