Résultats de la recherche
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Assessment models for Patagonian toothfish in research block 5843a_1 of Division 58.4.3a, Elan Bank
Abstract: I made two sensitive runs of CASAL catch at length models (LENGTH_MODEL) for stock ... between the two models were set as follows: year class strength (YCS) was fixed; parameters of ALK were ... years 2004/05 to 2012/13 following the recommendation during the last WG-SAM meeting. The two models are ... status assessments of Dissostichus eleginoides in research block 5843a_1 in Division 58.4.3a for the ...
Meeting Document : WG-FSA-14/22 : Auteur(s): K. Taki (Japan)
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Fitting a von Bertalanffy growth model to length-at-age data accounting for length-dependent fishing selectivity and length-stratified sub-sampling of length frequency samples
both age and measure for length there are two potential response-biased sampling processes when length ... process involving a particular gear, and (ii) the method of on-deck sub-sampling fish for ageing from the ... used to estimate the von Bertalanffy parameters for simulated and real data on the growth of the ... parameter estimation has been studied for linear and generalized linear, and linear mixed models but since ...
Meeting Document : WG-FSA-SAM-05/13 : Auteur(s): S.G. Candy (Australia)
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Scientific contribution to the 2016 review of Conservation Measure 51-07: Part 2 – outcomes from the application of the risk assessment framework for distributing the krill trigger level in Area 48
for distributing the krill trigger level in Area 48, which was described in Part 1 of this work (WG ... -FSA-16/47). This second part has two additional components of work: (i) results of the analyses using ... , including consideration of the matters raised by WG-EMM in 2016. The framework presented in Part 1 is shown ... here provide the input needed for the review of CM51-07 and the means by which further scenarios may be ...
Meeting Document : WG-FSA-16/48 Rev. 1 : Auteur(s): A. Constable (on behalf of the e-group on CM 51-07 WG-EMM review)
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Information Note for the Spatial Management Workshop and WG-EMM
: 20 minute service 08:00 to 18:30 (no Sunday service). For a route map see here. Tickets cost £2 ... single, £3 per day for unlimited use. A taxi from Cambridge rail station to BAS costs around £25-30 ... , Cambridge CB3 0ET: CCAMLR Workshop on Spatial Management (WS-SM-18) from 2 to 6 July 2018 and CCAMLR Working ... Group on Ecosystem Monitoring and Management (WG-EMM) from 9 to 13 July 2018. Venue The CCAMLR Spatial ...
Page : Site Section: Meetings
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The annual random stratified trawl survey in the waters of Heard Island (Division 58.5.2) to estimate the abundance of Dissostichus eleginoides and Champsocephalus gunnari for 2015
of 2014 and two and a half times that of the long-term average for the survey. The C. gunnari catch ... this year meant that 333 sets of otoliths were collected for L. squamifrons, 499 for C. rhinoceratus ... 2015, with the completion of 163 stations, an additional five stations compared with previous surveys ... sub-division into two boxes, one having 15 and the second 10 randomly allocated stations. In addition ...
Meeting Document : WG-FSA-15/11 : Auteur(s): G.B. Nowara, T.D. Lamb and D.C. Welsford (Australia)
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Marine Ecosystem Assessment for the Southern Ocean (MEASO)
held in Hobart in early April 2018 (http://www.measo2018.aq/). The conference provided an opportunity ... researchers. For this survey, an indication of where and when national research programmes have conducted ... from the field programmes are also being summarised, based on an open, international survey of ... Abstract: A first Marine Ecosystem Assessment for the Southern Ocean (MEASO) is under development ...
Meeting Document : SC-CAMLR-XXXVII/BG/22 : Auteur(s): A. Constable, J. Melbourne-Thomas, R. Trebilco and M. Brasier
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DEVELOPMENT OF RECOVERY PLANS FOR DEPLETED TOOTHFISH STOCKS IN THE INDIAN OCEAN SECTOR OF THE SOUTHERN OCEAN
years and then two years later. The surveys should have only low catches in order to not impede recovery ... recovery strategy for Patagonian toothfish on Ob and Lena Banks. Author(s): D.C. Welsford, A.J. Constable ... and commercial fishing and it is likely that they are depleted below the threshold for CCAMLR ... fisheries. An updated assessment of that status the stock at BANZARE Bank using data from the recent seasons ...
Meeting Document : WG-FSA-09/44 : Auteur(s): D.C. Welsford, A.J. Constable and J.P. McKinlay (Australia)
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Estimation of natural mortality for the Patagonian toothfish at Heard and McDonald Islands using catch-at-age and aged mark-recapture data from the main trawl ground
programmed in R, based on alternative ordinary differential equations (ODE) for within-year population ... were obtained using proportions-at-length and fishery and year specific age length keys (ALKs) for ... of the properties of these two models for estimation of M used simulation. In application to the data ... the model was or was not conditioned on the total numbers caught in each year. Author(s): S. Candy, D ...
Meeting Document : WG-FSA-10/41 : Auteur(s): S. Candy, D. Welsford, T. Lamb, J. Verdouw and J. Hutchins (Australia)
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Estimation of natural mortality for the Patagonian toothfish at Heard and McDonald Islands using catch-at-age and aged mark-recapture data from the main trawl ground
obtained using proportions-at-length and fishery- and year-specific age–length keys (ALKs) for years 1998 ... in R, based on alternative ordinary differential equations (ODE) for within-year population dynamics ... directly from the estimates of population numbers-at-age. The properties of these two models for estimation ... Paper Title: Estimation of natural mortality for the Patagonian toothfish at Heard and McDonald ... age frequencies within each fishing year. For an M of 0.155, the expected number of recaptures fitted ... along with two methods of applying an effective sample size. The estimation for these ver- sions of the ... used for the Antarctic toothfish was also 0.13 y–1, where this value was based on an analysis of ... fishery- and year-specific age–length keys (ALKs) for years 1998 to 2008. A large proportion of the ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 29–45 : Auteur(s): Candy, S.G., D.C. Welsford, T. Lamb, J.J. Verdouw and J.J. Hutchins
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A simulation study of the method of deriving natural mortality rate using data for Champsocephalus gunnari in Subarea 48.3
Paper Title: A simulation study of the method of deriving natural mortality rate using data for ... been correctly chosen. Data for Champsocephalus gunnari in Subarea 48.3 are used to show that the ... mortality, based on the construction of a regression between the rate of annual fishing mortality ... mortality rates and fishing mortality rates for the oldest age group by fishing year are estimated by the ... =e {.y- an .
for a> 0, Wa,y = WO,y = wl/2,y for a ... year Ey • A general procedure for the study of natural mortality rate specification with the use of ... it was better to use real data from the fishery for this purpose and as an example the C. gunnari ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 69–83 : Auteur(s): Gasyukov, P.S. and R.S. Dorovskikh