Documents

Document Number Sort ascending	Title	Agenda Item(s)
WG-FSA-SAM-04/4 Attachmen More Info	Draft fishery plans sections 1,2 and 3 CCAMLR Secretariat Submitted By: Admin Admin (CCAMLR Secretariat) Request Meeting Document
WG-FSA-SAM-04/20 More Info	Does the current South Georgia groundfish survey accurately estimate the standing stock of mackerel icefish? Agnew, D., Goss, C., Xavier, J., Belchier, M., Collins, M., Reid, K. Abstract: In subarea 48.3 mackerel icefish (Champsocephalus gunnari) are currently assessed by a bottom trawl survey, but evidence from predators and acoustics indicates that a considerable portion of the icefish biomass is in midwater and therefore missed by the bottom trawl survey. In January 2004, a short acoustic survey on FPRV Dorada showed that mackerel icefish, of all age classes, spend time in Read More Submitted By: Admin Admin (CCAMLR Secretariat) Request Meeting Document
WG-FSA-SAM-04/19 More Info	Considerations on the design and evaluation of surveys for estimating recruitment of Patagonian toothfish (Dissostichus eleginoides) with preliminary outcomes for the Heard Island plateau region (Division 58.5.2) Candy, S., Constable, A.J., Davies, C.R. Abstract: Assessments of long-term sustainable yield using the Generalised Yield Model and the setting of total allowable catches (TAC) for Patagonian Toothfish, Dissostichus eleginoides, for the Heard Island Plateau region (Division 58.5.2) are based on data obtained from annual random stratified trawl surveys (RSTS) and from targeted commercial fishing operations via an observer program. The current Read More Submitted By: Admin Admin (CCAMLR Secretariat) Request Meeting Document
WG-FSA-SAM-04/18 More Info	Estimating toothfish biomass in Subarea 48.3 using local depletions Pearce, J., Agnew, D. Abstract: We investigated local depletions of toothfish under concentrated fishing effort as a means of estimating toothfish density at South Georgia. Over the four years 2000-2003, we found 25 areas of 12’ by 12’ where there had been forty or more hauls in any particular year. There were 62 individual vessel fishing events in these areas over this period, 40 of which appeared to be depletions. Applying Read More Submitted By: Admin Admin (CCAMLR Secretariat) Request Meeting Document
WG-FSA-SAM-04/17 More Info	Alternative assessment methods for toothfish at South Georgia Kirkwood, G., Payne, A., Agnew, D. Abstract: We examine two alternatives to the survey recruitment/GY method for estimating toothfish abundance. An age structured production model (ASPM) is constructed and tuned to the CPUE series. The fit of the model to the CPUE series is not good, and there are several unexplained problems. The first is that the CPUE in the early 1990s did not decline as would be expected as the resource was initially Read More Submitted By: Admin Admin (CCAMLR Secretariat) Request Meeting Document
WG-FSA-SAM-04/16 More Info	Survey estimates of recruitment of toothfish in Subarea 48.3 Collins, M., Wakeford, R.C., Moir-Clark, J., Belchier, M., Agnew, D.J. Abstract: We reanalysed 16 groundfish surveys at South Georgia to determine whether recruitment data used by the Working Group for toothfish assessments in 1999 and later were correct. We found several unexplainable errors. A new, corrected, series of recruitment estimates was derived using new procedures and 6 strata (3 depth strata each at Shag Rocks and South Georgia). It is easy to spot, visually, Read More Submitted By: Admin Admin (CCAMLR Secretariat) Request Meeting Document
WG-FSA-SAM-04/15 More Info	Technical Specifications of Fish Heaven: version 2.1.5 Ball, I. Abstract: These are the technical specifications of the software Fish Heaven: version 2.1.5. The specifications include a description of the object structure of the model, the process structure of the model and a mathematical description of the model. Submitted By: Admin Admin (CCAMLR Secretariat) Request Meeting Document
WG-FSA-SAM-04/14 More Info	Estimating the level of illegal fishing using simulated scaling methods on detected activity Ball, I. Abstract: At its 2003 meeting, WG-FSA recommended that investigations be undertaken to determine whether the method for estimating catches from illegal, unregulated or unreported (IUU) fishing developed by Agnew and Kirkwood (2002) for Subarea 48.3 could be applied to other CCAMLR areas (SC-CAMLR-XXII, Annex 5, paragraph 3.18). The results of these simulations suggest that more information on IUU Read More Submitted By: Admin Admin (CCAMLR Secretariat) Request Meeting Document
WG-FSA-SAM-04/13 More Info	Development of a population model for the assessment of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea Gilbert, D.J., Bull, B., Dunn, A., Hanchet, S.M. Submitted By: Admin Admin (CCAMLR Secretariat) Request Meeting Document
WG-FSA-SAM-04/12 More Info	Variants of the ASPM assessment of the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity which attempt to reconcile CPUE and catch-at-length data Brandão, A., Butterworth, D.S. Abstract: Two variants of the ASPM assessment of the Prince Edward Islands toothfish resource are examined. One allows for the possibility of changes in somatic growth rate in response to increased food availability as resource abundance drops. The other permits annual fluctuations about a deterministic stock-recruitment relationship. A fit of the first variant yields the biologically implausible result Read More Submitted By: Admin Admin (CCAMLR Secretariat) Request Meeting Document
WG-FSA-SAM-04/11 More Info	On the catchability of bottom trawl in relation to icefish (C. gunnari) Kasatkina, S.M., Ivanova, V.F. Abstract: Analysis of Russia HAK-4M trawl catchabilities has been made in the paper. This trawl have been used when icefish bottom surveying. An analysis of total catchability and a differential one (that is catchability in relation to fish of different length) has been realized by models of probability statistical theory for fishing trawls. Influence of trawling speed, trawl configuration and Read More Submitted By: Admin Admin (CCAMLR Secretariat) Request Meeting Document
WG-FSA-SAM-04/10 More Info	Revision of icefish (C. gunnari) stock estimate in the South Georgia area on the basis of the Russian trawl-acoustic survey 2002 Gasyukov, P.S., Kasatkina, S.M. Abstract: Revision of icefish (С.gunnari) stock estimate in South Georgia Area was caused by elaboration of the following methodical aspects of trawl-acoustic survey: the processing method improvement for target strength estimates using in situ measurement data; the combination of trawl and acoustic surveys results for icefish biomass estimates . We discus these methodical aspects and present the Read More Submitted By: Admin Admin (CCAMLR Secretariat) Request Meeting Document
WG-FSA-SAM-04/09 More Info	Application of the bootstrap-method in assessment of target strength regression parameters on the basis of in situ measurements P.S. Gasyukov and S.M. Kasatkina (Russia) Abstract: Target strength (TS) as a function of fish length (L) must be known to estimate fish density in acoustic survey. This TS-length function may be estimated by comparing in situ acoustic measurements with the fish size composition from trawl catches and should be accompanied with accuracy indices characterizing the uncertainty of its parameters. We show that the bootstrap–method is a highly Read More Submitted By: Admin Admin (CCAMLR Secretariat) Approved By: Admin Admin (CCAMLR Secretariat) Request Meeting Document
WG-FSA-SAM-04/08 More Info	Approaches to monitoring and assessing toothfish in new and exploratory fisheries, with particular reference to Subarea 88.1 ODriscoll, R.L., Hanchet, S.M. Abstract: This report presents results from a desktop study to consider approaches to monitoring and assessing toothfish in New and Exploratory fisheries. We review standardised CPUE analysis, quantitative research longline surveys, experimental manipulation of fishing effort, tagging programmes, bottom trawl surveys of juvenile grounds, and acoustic surveys. Because of potential biases we believe that Read More Submitted By: Admin Admin (CCAMLR Secretariat) Request Meeting Document
WG-FSA-SAM-04/07 More Info	Feasibility of trawl surveys to estimate abundance of juvenile toothfish in Subarea 88.1 Wood, B.A., ODriscoll, R.L., Hanchet, S.M. Abstract: This report presents results from a desktop study to determine the feasibility of conducting trawl surveys for juvenile toothfish in Subarea 88.1 (Ross Sea). Potential problems including a largely unknown juvenile distribution, variable ice cover, large survey area, and rough bottom topography, were considered using data from published and unpublished literature, the exploratory longline Read More Submitted By: Admin Admin (CCAMLR Secretariat) Request Meeting Document
WG-FSA-SAM-04/06 More Info	Re-organisation of WG-FSA Report CCAMLR Secretariat Abstract: In 2003, WG-FSA and the Scientific Committee identified the need to rewrite and restructure the WG-FSA report. In early 2004, the extend and nature of the work required was developed in consultation between the Conveners of WG-FSA and WG-IMAF, and the Chair of the Scientific Committee, incorporating comments from other WG-FSA Members and the Secretariat. It was also agreed to contract Dr Inigo Read More Submitted By: Admin Admin (CCAMLR Secretariat) Request Meeting Document
WG-FSA-SAM-04/05 More Info	Update on the external review of the Generalised Yield Model (GYM) software and manual CCAMLR Secretariat Abstract: In 2003, WG-FSA requested that the Secretariat supervise an external review of the GYM software and manual (SC-CAMLR-XXII, Annex 5, paragraph 9.18). The key steps in this proposed review included: • Members providing guidance on the scope of the review; • Members proposing appropriate independent experts to conduct the review; • Reviewer to complete the review by end of June Read More Submitted By: Admin Admin (CCAMLR Secretariat) Request Meeting Document
WG-FSA-SAM-04/04 More Info	Further development of the fishery plans Secretariat Abstract: The Secretariat has been developing Fishery Plans under the Regulatory Framework established by the Scientific Committee and Commission. In recent years, Plans have been drafted for the krill fishery in Area 48 (see WG-EMM-01/7, 02/6 and 03/28) and other fisheries (see WAMI-01/5, WGFSA-02/9 and 03/6). Each Fishery Plan draws together the history of management measures and fishery requirements Read More Submitted By: Admin Admin (CCAMLR Secretariat) Request Meeting Document
WG-FSA-SAM-04/03 More Info	List of documents Submitted By: Admin Admin (CCAMLR Secretariat) Request Meeting Document
WG-FSA-SAM-04/02 More Info	List of participants Submitted By: Admin Admin (CCAMLR Secretariat) Request Meeting Document
WG-FSA-SAM-04/01 More Info	Agenda Submitted By: Admin Admin (CCAMLR Secretariat) Request Meeting Document

WG-FSA-SAM-04

Agenda