Résultats de la recherche
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Effects of recruitment variability and natural mortality on Generalised Yield Model projections and the CCAMLR Decision Rules for Antarctic krill
Abstract: AMLR krill sampling data was supplied to the Generalised Yield Model as the " ... ;vector of recruitments" input option to simulate the population dynamics of krill in the Antarctic ... Peninsula region (Subarea 48.1) under various assumptions. The annual proportions of krill less than 36 mm ... in length to the total captured in AMLR net samples in four sampling regions of the Antarctic ...
Meeting Document : WG-EMM-12/26 : Auteur(s): D. Kinzey, G. Watters and C. Reiss (USA)
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Assessment models for Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea region to 2016/17
Abstract: We provide an update of the Bayesian sex and age structured population stock assessment ... for Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea region (Subareas 88.1 and SSRUs 88.2A–B ... ), using catch, catch-at-age, and tag-recapture data from 1998 to 2017 and including the results from the ... Ross Sea Shelf survey from 2012 to 2017. The model estimates of unfished biomass and current status ...
Meeting Document : WG-FSA-17/37 Rev. 1 : Auteur(s): S. Mormede
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Notification for scientific research in 2019/20 under CM 24-01: Proposal for a winter longline survey of Antarctic toothfish in the northern region of Subareas 88.1 and 88.2
. Evidence to date found no change in these characteristics in June, suggesting sampling later in the ... Abstract: We propose to test three hypotheses to describe the reproductive ecology of Antarctic ... true, this would retain eggs near the spawning locations under the vast sea ice extent and once broken ... up in the spring, may provide access to a productive pagophilic ecosystem for feeding as well as a ...
Meeting Document : WG-SAM-18/09 : Auteur(s): Delegation of New Zealand
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Summary of monitoring and research effort and preliminary results from the 2019 Scotia Sea krill monitoring survey with FV Cabo de Hornos
Abstract: We here summarise the sampling effort and some preliminary findings from the 2019 ... Scotia Sea krill monitoring survey with the F/V Cabo de Hornos. The vessel was chartered by the ... Association of Responsible Harvesting Companies (ARK) and manned with personnel from the Institute of Marine ... Research to carry out a significant part of the 2019 Scotia Sea large scale krill monitoring. All sections ...
Meeting Document : WG-EMM-2019/46 : Auteur(s): G. Skaret, M. Martinussen, G. McCallum, R. Pedersen, J. Rønning, A.L. Donoso, O.A. Bergstad and B.A. Krafft
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A characterisation of the toothfish fishery in Subareas 88.1 and 88.2 from 1997/98 to 2009/10
considerably over time in each of the fisheries showing no trend in the main fisheries in Subarea 88.1 and SSRU ... Abstract: The exploratory fishery for Dissostichus spp. Has now been operating for 14 years in ... Subarea 88.1 and for 9 years in Subarea 88.2. This report summarises the timing, depth, and location of ... fishing together with the catch of Dissostichus spp and bycatch species by year for the period 1997–98 to ...
Meeting Document : WG-FSA-10/23 : Auteur(s): S.M. Hanchet, M.L. Stevenson and A. Dunn (New Zealand)
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Revised assessment models for Patagonian toothfish in research block C of Division 58.4.4, Ob & Lena Banks for the years 1989/1990 to 2012/13
eleginoides in research block C in Division 58.4.4 b on the assumption of constant year class strength and no ... IUU fishing occurrence in the block. The five models are as follows: 1) catch at length model as ... parameters were not estimated in these models according to the recommendations in the last WG-FSA meeting. In ... addition, proportion mature for ages was calculated on the assumption of logistic curve fitting for the ...
Meeting Document : WG-SAM-14/15 : Auteur(s): K. Taki (Japan)
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Glider-based estimates of Antarctic krill in Bransfield Strait, and the West shelf off Livingston Island, Antarctica
biomass assessments of Antarctic krill (Euphausia superba) in the Bransfield Strait and the west shelf of ... those from ship-based surveys historically conducted by the U. S. Antarctic Marine Living Resources ... (AMLR) Program at several temporal and spatial scales to explore the feasibility of using gliders to ... replace vessel-based biomass surveys. In the Bransfield Strait, glider-based biomass density estimated ...
Meeting Document : WG-EMM-2019/13 : Auteur(s): C. Reiss, A. Cossio, G. Cutter, J. Walsh and G. Watters
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Scientific requirements for an orderly development of the krill fishery
Abstract: At CCAMLR XXV Australia presented the results of the BROKE-West acoustic krill biomass ... survey. These were used by the Scientific Committee to recommend to the Commission a revised ... tonnes). During the Commission deliberations on this issue Australia noted that while the scientific data ... supported the large increase in the precautionary catch limit, such a large increase required the inclusion ...
Meeting Document : WG-EMM-07/23 : Auteur(s): A. Constable, G. Slocum and S. Nicol (Australia)
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Progress towards an assessment of Antarctic toothfish (Dissostichus mawsoni) in Subarea 88.2 SSRUs 882C–H for the years 2002/03 to 2017/18 using a two-area model
Antarctic toothfish (Dissostichus mawsoni) in the Amundsen Sea region, defined here as SSRUs 88.2C–H. The ... region is split into two areas: the North (SSRU 88.2H) comprising large mature fish, and the South (SSRUs ... were first developed for the region in 2014 and refined in 2015 and 2016. Results showed the need to ... collect mark-recapture data in the South to inform the estimation of biomass in the South. Simulation work ...
Meeting Document : WG-FSA-18/37 : Auteur(s): S. Mormede and S. Parker
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Fish Heaven: a Monte Carlo, spatially explicit single species fishery model for the testing of parameter estimation methods
Abstract: Fish Heaven is a simple spatially explicit age structured fish model, containing the ... object oriented framework to allow for the possible extension in a number of directions. In particular it ... was designed with the view of testing the efficacy of different statistical sampling regimes given ... various plausible spatial structures of fish stock. The model has a simple age and space structured ...
Meeting Document : WG-FSA-00/36 : Auteur(s): I. Ball and A. Constable (Australia)