Search results
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An ecosystem-based management procedure for krill fisheries: a method for determining spatially-structured catch limits to manage risk of significant localised fisheries impacts on predators
precautionary approach of CCAMLR for krill and can utilise existing datasets, including B0 surveys, local scale ... precautionary approach of CCAMLR for krill and can utilise existing datasets, including B0 surveys, local scale ...
Meeting Document : WG-EMM-15/36 : Author(s): A. Constable and S. Candy (Australia)
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Assessment models for Antarctic toothfish (Dissostichus mawsoni) in Subarea 88.2 SSRU 88.2E for the years 2002–03 to 2010–11
) biomass estimated at 82.7% B0 (95% credible intervals 80.0–85.1%). Estimated yields from this model ... ) biomass estimated at 82.7% B 0 (95% credible intervals 80.0–85.1%). Estimated yields from this model were ... ) spawning stock abundance B0 d at 10 100 t (95% credible intervals 8 720–11 770 t), and current (B2011 ...
Meeting Document : WG-FSA-11/44 : Author(s): S. Mormede, A. Dunn and S.M. Hanchet (New Zealand)
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Fishery Report 2013: Exploratory fishery for Dissostichus spp. in South Sandwich Islands (Subarea 48.4)
a shifting mode from 80–100 cm at the beginning of the time series to 125–140 cm in the most recent season ... (Figure 2a). A second mode of smaller fish (60–80 cm) becomes evident in 2009 and persists throughout ... Total 10 (0) 1 (0) 193 (2) 202 (22) 83 (7) 147 (6) 179 (0) (b) Flag State Vessel name Season ... . The by-catch in Subarea 48.4 consists predominantly of macrourids, with a maximum of 26 tonnes being recorded ...
Document : Site Section: Publications
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An investigation of integrated stock assessment methods for the Patagonian toothfish (Dissostichus eleginoides) in Division 58.5.2 using CASAL
generally improves the confidence in the estimates of B0 and the recruitment series. Despite these results ... this uncertainty in the estimate of long-term annual yield. Further discussion is needed on the choices being made ... in how the datasets are used in this assessment and the approaches being used to estimate the key ... generally improves the confidence in the estimates of B0 and the recruitment series. Despite these results ...
Meeting Document : WG-FSA-SAM-06/14 : Author(s): A. Constable, S. Candy and I. Ball (Australia)
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Integrated stock assessment for the Heard Island and the McDonald Islands Patagonian toothfish (Dissostichus eleginoides) fishery (Division 58.5.2)
with YCS estimation, estimates of virgin spawning biomass (B0) ranged from 89 448 - 101 847 tonnes, and SSB ... status in 2013 ranged from 0.63 - 0.69 of B0. A model scenario that ignored information on YCS variation ...
Meeting Document : WG-FSA-13/24 : Author(s): P. Ziegler, S. Candy and D. Welsford (Australia)
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Evaluating the impact of multi-year research catch limits on overfished toothfish populations
biomass (B0) was set at 5 000 tonnes, to be within the range of total aggregate catches taken from ... of fishing. With the biological parameters chosen, SSB0 was 3 530 tonnes or ~71% of B0 in the simu- lated ... mortality being 0.1 higher or lower than the assumed value of 0.13 was tested in scenarios 18 and 19 ... mortal- ity on mature fish that was not being compensated for by the sufficient addition of newly ... additional fisheries removals for research purposes needs to be evaluated against the risk that such catches ... should be avoided to ensure that research does not significantly impact on the recovery of depleted ... stocks in the long term. Research catches may need to be even lower where there is uncertainty regarding ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 47–55 : Author(s): Welsford, D.C
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e-imaf-04 report.pdf
... -FSA report and has been extracted here as a separate document) INCIDENTAL MORTALITY ... /87 and 04/88). (i) Line weighting – collaboration was conducted between France and Australia ... with French fishers, mainly in relation to IWLs. Many mitigation options were being used, including the use ... on board eight vessels reported that fishing gear, snoods and hooks, were occasionally being disposed ... intersessional activities for 2004/05, compiled by the Convener and Science Officer, be appended to its report ... fishing operations. 7.14 Dr Constable suggested that it would be very useful to estimate the mean level ... cruises in Division 58.5.1, the data on birds observed killed can be converted to estimates of total application/pdf attached to:Ad Hoc WG-IMAF-04
Meeting Report : Ad Hoc WG-IMAF-04
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Matlab code for calculating krill biomass in a survey area
has revealed inconsistencies and omissions in the documentation, complicating attempts by interested ... , thoroughly documented, and generically applicable code for calculating acoustic biomass estimates for any ... inconsistencies and omissions in the documentation, complicating attempts by interested parties in using ... this approach to estimate biomass in other areas. Here we present new, more efficient, thoroughly documented ...
Meeting Document : SG-ASAM-16/03 : Author(s): A. Cossio, J. Renfree and C. Reiss
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Multinational large-scale krill synoptic survey in CCAMLR Area 48 in 2019 – survey plan and protocol for consideration by SG-ASAM 2018
instrumentation and sampling gear to achieve approximate consistency with the CCAMLR B0 data collection protocol ... : Content Approved Delegation responsibility for releasing documents: Norway ... instrumentation and sampling gear to achieve approximate consistency with the CCAMLR B0 data collection protocol. ...
Meeting Document : SG-ASAM-18/07 : Author(s): B.A. Krafft, O.A. Bergstad, T. Knutsen, G. Skaret and G. Macauley
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ADDING CATCH AT AGE AND SURVEY DATA TO THE 48.3 TOOTHFISH CASAL ASSESSMENT
using short runs of catch-at-age data and the catchability being estimated by the survey. Estimates ... for doing this are proposed which maintain SSB above 50% B0 in both the short and long term. Author(s): D.J ... using short runs of catch-at-age data and the catchability being estimated by the survey. Estimates ... for doing this are proposed which maintain SSB above 50% B0 in both the short and long term. ...
Meeting Document : WG-SAM-09/13 : Author(s): D.J. Agnew and M. Belchier (United Kingdom)