Résultats de la recherche
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Preliminary assessment of long-term yield of Patagonian toothfish (Dissostichus eleginoides) for the Heard Island region (CCAMLR Division 58.5.2) based on a random stratified trawl survey in June 2005
58.5.2 in the vicinity of Heard Island in June 2005 to provide the information for an assessment of short ... for the area of Division 58.5.2 to the west of 79°20’ E using standard CCAMLR methods. It also ... function for the future projections based on full selection of adult fish, and (iv) consequence of reducing ... long-term yield of Patagonian toothfish (Dissostichus eleginoides) for the Heard Island region (CCAMLR ...
Meeting Document : WG-FSA-05/30 : Auteur(s): A.J. Constable, T. Lamb and R. Williams (Australia)
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Best practice seabird by-catch mitigation for Spanish-rig longline vessels with emphasis on line weighting regimes
between weights on longlines (30 m, 40 m and 50 m) and mass of the weights (4 kg, 6 kg and 8 kg) on sink ... mitigation for Spanish-rig longline vessels with emphasis on line weighting regimes Approval: Approved ... throughout the southern hemisphere and has been the source of a large number of seabird fatalities. An ... priority because Spanish system gear, while fast to deeper depths (10-20 m), is slow to clear surface ...
Meeting Document : WG-FSA-06/22 : Auteur(s): G. Robertson (Australia), C.A. Moreno (Chile), B. Wienecke (Australia), P. Gandini (Argentina), G. McPherson (Australia) and J.-P. Seco Pon (Argentina)
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Report on fishing effort and seabird interactions during the season extension trials in the longline fishery for Dissostichus eleginoides in Statistical Division 58.5.2
Abstract: CCAMLR XXXIV (para. 5.68) endorsed new pre-season (1-14 April) and post-season (15-30 ... November) trial season extensions, in addition to existing pre-season (15-30 April) and post-season (1-14 ... periods 1-14 November 2016, 15-30 November 2016, 1-14 April 2017 and 15-30 April 2017. This report ... trials in the longline fishery for Dissostichus eleginoides in Statistical Division 58.5.2 Approval ...
Meeting Document : WG-FSA-17/20 : Auteur(s): T. Lamb
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Estimating the impact of depredation by killer whales and sperm whales on longline fishing for toothfish (Dissostichus eleginoides) around South Georgia
, depressing CPUE by up to 20%. Sperm whales have been more frequently encountered in recent years, occurring ... and sperm whales on longline fishing for toothfish (Dissostichus eleginoides) around South Georgia ... consistent with no obvious pattern between months. Both species demonstrate an east to west migration ... without the presence of cetaceans, accounting for other determinants of toothfish CPUE through a ...
Meeting Document : WG-FSA-10/P06 : Auteur(s): J. Moir Clark and D.J. Agnew
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Estimation of natural mortality using catch-at-age and aged mark-recapture data: a simulation study comparing estimation for a model based on the Baranov equations versus a new mortality equation
-recapture data were generated for 12 years of fishing. Two alternative estimation models were programmed in ... . The model based on a new mortality equation (CCODE model) uses an ODE with constant within-year catch ... the age-structured population for each fishing year by annual recursive use of difference equations ... (ODE) for within-year population dynamics. The difference in the models derives from differences in ...
Meeting Document : WG-SAM-10/11 Rev. 1 : Auteur(s): S.G. Candy (Australia)
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Progress report on the research fishery for Dissostichus spp. in Subarea 48.6 being jointly undertaken by Japan and South Africa: 2012/13 and 2013/14
reported and achievements for the first two months of the 2013/14 season are briefly mentioned. Over the ... report on the research fishery for Dissostichus spp. in Subarea 48.6 being jointly undertaken by Japan ... Abstract: Japan and South Africa are undertaking a multi-year research plan in Statistical ... Dissostichus resource in Subarea 48.6 to be undertaken next year. Concern is expressed over the rise of IUU ...
Meeting Document : WG-SAM-14/10 : Auteur(s): R. Leslie (South Africa), K. Taki, T. Ichii (Japan) and S. Somhlaba (South Africa)
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Seal mitigation measures on trawl vessels fishing for krill in CCAMLR Subarea 48.3
Paper Title: Seal mitigation measures on trawl vessels fishing for krill in CCAMLR Subarea 48.3 ... methods employed for consideration by the ad hoc Working Group on Incidental Mortality Arising from ... Fishing (WG-IMAF). Three CCAMLR international scientific observers recorded mitigation measures for fur ... season. These approaches, aimed at reducing seal entanglements, are similar to the two systems ... measures on trawl vessels fi shing for krill of a metal grid sloped at an angle to divert seals out ... krill A combination of an escape panel and a mesh barrier were used on the Nitaka Maru for the ... device, seal entanglements were recorded for the fi rst two trawls. As a result, the gear was modifi ed ... where the headrope and groundrope connected to the warps. Two mesh planes, 44 m in width and 20 m in ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 195–205 : Auteur(s): Hooper, J., J.M. Clark, C. Charman and D. Agnew
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A risk-management framework for avoiding significant adverse impacts of bottom fishing gear on Vulnerable Marine Ecosystems
Paper Title: A risk-management framework for avoiding significant adverse impacts of bottom ... , closed areas around identified VMEs, open and closed management areas, by-catch limits for VME-forming ... fishing gear on Vulnerable Marine Ecosystems Abstract / Description: CCAMLR adopted a new conservation ... measure in 2007 to ensure that significant adverse impacts of bottom fishing gear on Vulnerable Marine ... information is not known, as is the case for VMEs in the Southern Ocean, an appropriate spatial scale for ... Likely (5) 0 5 10 15 20 25L ik el ih oo d Almost certain (6) 0 6 12 18 24 30 Martin-Smith 184 ... studies. For example, damage to Lophelia pertusa reefs off Norway was estimated to be 30–50%, but the ... activities (CCAMLR, 2007b, paragraph 5.12) and the necessity to develop an approach for identifying VMEs ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 177–193 : Auteur(s): Martin-Smith, K
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The effect of temporal variability on power analysis predictions for Adélie penguin CEMP parameters at Béchervaise Island
(5.2 – 6.7%). For example, with a 10 year monitoring program it is possible to detect fixed increases ... generated using an exponential model compared with a linear model for short term monitoring programs of up ... temporal variability on power analysis predictions for Adélie penguin CEMP parameters at Béchervaise Island ... Abstract: There are unresolved issues surrounding the use of power analyses for examining the ...
Meeting Document : WG-EMM-03/49 : Auteur(s): L.M. Emmerson and C. Southwell (Australia)
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Evaluation of the effects of illegal, unregulated and unreported (IUU) fishing on the legal catch of fisheries for Dissostichus eleginoides
Abstract: CCAMLR currently establishes catch limits each year for Patagonian toothfish ... year to compensate for the effects of historical levels of IUU catches. To date, the rate of reduction ... catch was estimated using the GYM and applied as the legal catch limit for the following year, assuming ... limit derived from an assessment based on the 2001 WG-FSA assessments, which is approximately 3 000 ...
Meeting Document : WG-FSA-02/69 : Auteur(s): A.J. Constable (Australia)