Search results
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Revised input parameters and implications for the Antarctic toothfish (Dissostichus mawsoni) stock assessment in Subareas 88.1 and 88.2
Abstract: In this paper, we address a number of aspects of the model inputs and parameters of the ... Antarctic toothfish stock assessment for the Ross Sea fishery. In particular we review catch history, length ... runs that investigate the sensitivity of the 2006 stock assessment to changes in these model inputs and ... parameters. Tree-regression methods were used to investigate the areal structure of the length distribution ...
Meeting Document : WG-SAM-07/6 : Author(s): A. Dunn and S.M. Hanchet (New Zealand)
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Preliminary assessment of mackerel icefish, Champsocephalus gunnari, on the Heard Island Plateau (Division 58.5.2) based on a survey in April–May 2003
(Division 58.5.2) was undertaken using the standard CCAMLR methods, based on the result of a randomly ... stratified trawl survey completed between 16 April and 10 May 2003. The 2003 estimate of abundance was ... approximately 20% of the 2002 estimate. This decline in abundance is consistent with the passage of the strong ... 1997 cohort through the population and relatively weak recruitment in 1999 and 2000. The 1+ fish ...
Meeting Document : WG-FSA-03/32 : Author(s): A.J. Constable, C.R. Davies, R. Williams and T. Lamb (Australia)
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LENGTH AND AGE AT SPAWNING OF ANTARCTIC TOOTHFISH DISSOSTICHUS MAWSONI IN THE ROSS SEA
male Antarctic toothfish Dissostichus mawsoni from fish sampled in the Ross Sea spanning the 2000-2009 ... fishing seasons. The female spawning ogive incorporates the proportion of sexually mature fish that do not ... management decision rules. A characterisation of the oocyte developmental cycle of Antarctic toothfish shows ... that primary endogenous growth can occur for an extended period with oocytes accumulating at the ...
Meeting Document : WG-FSA-09/37 : Author(s): S.J. Parker and P.J. Grimes (New Zealand)
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ASSESSMENT MODELS FOR ANTARCTIC TOOTHFISH (DISSOSTICHUS MAWSONI) IN SUBAREA 88.2 SSRU E FOR THE YEARS 2002/03 TO 2008/09
Abstract: We provide an update of the Bayesian sex and age structured population stock assessment ... model for Antarctic toothfish (Dissostichus mawsoni) in the SSRU 88.2E, using revised catch, catch-at ... -age and tag-recapture data from New Zealand vessels and for selected trips. The New Zealand vessels ... model resulted in a higher estimate of initial biomass than the same model for 2006, but the estimated ...
Meeting Document : WG-FSA-09/41 : Author(s): A. Dunn and S.M. Hanchet (New Zealand)
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Report on scientific observations onboard the Chilean longliner, ‘Puerto Ballena’, in Statistical Subarea 48.3 from March to May 1996
Abstract: Scientific observation under the auspices of the CCAMLR Scheme of International ... Scientific Observatio was conducted onboard the Chilean longliner 'Puerto Ballena' fishing for ... Patagonian toothfish (Dissostichus eleginoides) in Subarea 48.3 from March to May 1996. Details of the cruise ... D. eleginoides, the estimation of the finfish by-catch, the estimation of a conversion factor of ...
Meeting Document : WG-FSA-96/22 : Author(s): Selling, J., Kock, K.-H.
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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 2015–16 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 main areas: the North (SSRU 88.2H) comprising large mature fish, and the South ... models were first developed for the region in 2014 and refined in 2015. Results showed the need to ... collect mark-recapture data in the South to help inform the estimation of biomass in the South. We present ...
Meeting Document : WG-FSA-16/44 : Author(s): S. Mormede, K. Large and S. Hanchet
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Spatial and seasonal distribution of adult Oithona similis in the Southern Ocean: predictions using boosted regression trees
trees to derive relationships between environmental conditions and the distribution of the adult stage ... of the cyclopoid copepod Oithona similis in the Southern Ocean. Nearly 20 000 samples from the ... Southern Ocean Continuous Plankton Recorder survey (87% from East Antarctica) were used to model the ... waters. We demonstrate that it is possible to obtain reasonable models for both the presence (area under ...
Meeting Document : WG-EMM-10/P14 : Author(s): M.H. Pinkerton, A.N.H. Smith, B. Raymond, G.W. Hosie, B. Sharp, J.R. Leathwick and J.M. Bradford-Grieve
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Research plan for the exploratory longline fishery for Dissostichus spp. in SSRUs C, E and G in Division 58.4.1 in 2012/13 (this is a revision of WG-SAM-12/10 Rev. 1)
Abstract: In the Division 58.4.1 there are two stocks; one extends from the SSRU 58.4.1C to the ... SSRU 58.4.2A, and the other one to the SSRU 58.4.1H. The population sizes were vulnerable with a big ... range of about 1000-2000 t per SSRU in 58.4.1 and 100-1500 t per SSRU in 58.4.2. During the 2003-2007 ... recaptured which were not enough data to estimate stock biomass for considering the precautionary catch limit ...
Meeting Document : WG-FSA-12/39 : Author(s): Delegation of the Republic of Korea
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AN ASSESSMENT OF ARTIFICIAL BAIT (NORBAIT™) AS A MEANS OF REDUCING THE INCIDENTAL CATCH OF MACROURUS AND OTHER BYCATCH SPECIES IN HIGH LATITUDE TOOTHFISH FISHERIES
Abstract: The New Zealand fishing company Sanford Limited has initiated a research project to ... assess the effectiveness of artificial bait as a means of reducing the incidental catch of Macrouridae ... (rattails) and other bycatch species in the toothfish autoline longline fishery. A company vessel carried ... out some initial experimental work in the western Ross Sea (CCAMLR Statistical Subarea 88.1) in 2007 ...
Meeting Document : WG-FSA-08/52 : Author(s): J.M. Fenaughty (New Zealand)
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Recommendations on estimating krill escape mortality during fishing operations: the problems and approaches
Abstract: The task to estimate the escape mortality of krill during the fishing operation ... assigned by Scientific Committee requires assessment of the total krill passed through the rope and netting ... parts of trawl and krill amount appeared unviable in the process of escapement. The recommendations ... presented are the first attempt to develop the method of instrumental assessment of the «escape mortality ...
Meeting Document : WG-SAM-10/06 : Author(s): V.K. Korotkov and S.M. Kasatkina (Russia)