Résultats de la recherche
-
A model at the level of the foraging trip for the indirect effects of krill (Euphausia superba) fisheries on krill predators
fishery. 3. The biomass of krill appropriate for the predators (and the fishery) fluctuates from one year ... to the next according to an age-structured, stochastic recruitment model. We use the model to ... Abstract: 1. Although the development of fisheries for krill in the southern oceans has prompted ... population level effects. Here, we present for. the first time a model at the level of the foraging trip for ...
Meeting Document : WG-EMM-96/20 : Auteur(s): Switzer, P.V., Mangel, M.
-
Biological parameters for icefish (Chionobathyscus dewitti) in the Ross Sea, Antarctica
(TL) and about 3–4 years of age and that 95% were mature at about 370–400 mm (TL) and 6–8 years of age ... asymptotic maximum size than males. Maximum ages of 8 and 11 years were obtained for male and female fish ... , diet, and age estimation. All of the icefish sampled were identified as Chionobathyscus dewitti, and ... showed no significant difference in sex ratio. Meristic, diet and age data were consistent with previous ...
Meeting Document : WG-FSA-07/25 : Auteur(s): C.P. Sutton, M.J. Manning, D.W. Stevens, P.M. Marriott (New Zealand)
-
Some comments on the procedure for testing estimators of krill abundance which utilise survey data
Paper Title: Some comments on the procedure for testing estimators of krill abundance which ... indeed likely to provide improved performance in practice. Such studies require a simple method for ... provide an encouraging improvement in fits to the distribution of inter-swarm distances observed on the ... is needed before such models can be used as the basis for the simulation studies required- some ... procedure in most circumstances. An objection that has been raised to this approach is that it is ... ; further, an underlying density trend could be argued from inspection of this plot. However, for the ... and Figure 2. This table also includes the fit for an assumed random distribution, i.e. the negative ... The ability of the two-level models considered to mimic an observed spatial distribution pattern for ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 191–205 : Auteur(s): Butterworth, D.S., D.L. Borchers and D.G.M. Miller
-
Revised proposal for a CCAMLR sponsored research survey to monitor abundance of pre-recruit Antarctic toothfish in the southern Ross Sea
and requested members develop a pre-recruit survey design. A preliminary proposal for a pre-recruit ... survey was presented to the 2011 meeting of WG-SAM. In this paper we provide an update of the preliminary ... for the research proposal for a longline survey of pre-recruit toothfish in the southern Ross Sea ... survey, the target fish age and length classes to be monitored, appropriate survey strata size and ...
Meeting Document : WG-FSA-11/47 : Auteur(s): S.M. Hanchet, S. Mormede, S.J. Parker and A. Dunn (New Zealand)
-
Principles for evaluating data collection plans in data-poor exploratory fisheries
Commissions’ goals for new, exploratory and closed fisheries as well as satisfying the objectives in Article ... developing robust assessments of status of Dissostichus spp. in exploratory fisheries. Each additional year ... of principles to assist the Scientific Committee with developing a framework for research in data ... II. Author(s): P.E. Ziegler, D.C. Welsford and A.J. Constable (Australia) Title: Principles for ...
Meeting Document : WG-SAM-11/08 : Auteur(s): P.E. Ziegler, D.C. Welsford and A.J. Constable (Australia)
-
Use of the Leslie stock depletion model for the assessment of local abundance of Patagonian toothfish (Dissostichus eleginoides)
Paper Title: Use of the Leslie stock depletion model for the assessment of local abundance of ... used to examine local patterns in catch per unit effort (CPUE) in the longline fisheries for Patagonian ... in localised areas for periods of at least three days. The results suggest that there is greater ... potential for application of the model in some areas than in others, but in general there is no sufficiently ... to fisheries for D. eleginoides off the Pacific coast of Chile. An experimental approach similar to ... the 1993/94 season. This was an attempt to provide suitable data for a series of local estimates of ... for them to be modelled using the linear regression. An alternative explanation which should be ... ) since 1989. Vessels from the former Soviet Union dominated the fishery for the first three years ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 55–77 : Auteur(s): Parkes, G., C.A. Moreno, G. Pilling and Z. Young
-
Selecting sampling frequency for measuring diving behaviour
seals: an increase in interval from 5s to 15s resulted in 20% of dives being unrecognised, a 38 ... fur seals and southern elephant seals representative of the extremes of diving in pinnipeds. For both ... concatenated) increased monotonically as sampling interval increased. Effects were especially marked for fur ... surface interval. In elephant seals an increase in interval from l0s to l00s produced changes of 10%. 5 ...
Meeting Document : WG-CEMP-93/14 : Auteur(s): I.L. Boyd (United Kingdom)
-
Reassessment of important population parameters for Dissostichus eleginoides on the Heard Island Plateau (Division 58.5.2) based on time series of surveys and fishery data
. An approach is proposed to estimate age selectivity to the trawl fishery in the region. In conclusion ... Abstract: A large body of data and techniques are available for re-assessing the biological ... -estimated in the past. An estimate of natural mortality indicates that mortality of young fish, ages 3-8 ... (Australia) Title: Reassessment of important population parameters for Dissostichus eleginoides on the Heard ...
Meeting Document : WG-FSA-01/73 : Auteur(s): A.J. Constable, R. Williams, T. Lamb, I.R. Ball and E. van Wijk (Australia)
-
Updates to Fishery Reports – A prototype based on the ‘Exploratory fishery for Dissostichus mawsoni in Subarea 48.6’ Fishery Report
SAM meeting server). The 2018 Working Group on Fish Stock Assessment welcomed the Secretariat’s intent ... to transform the way Fishery Reports will be published, into standardised and automated webpages (WG ... prototype based on the ‘Exploratory fishery for Dissostichus mawsoni in Subarea 48.6’ Fishery Report ... responsibility for releasing documents: CCAMLR Secretariat ...
Meeting Document : WG-SAM-2019/35 : Auteur(s): CCAMLR Secretariat
-
Fishery Report: Exploratory fishery for Dissostichus spp. in Division 58.4.3a
applies to this fishery and in recent years has been linked to an exemption for night setting in CM 24-02 ... exploratory in 2000. That year, the Commission agreed on four exploratory fisheries for Dissostichus spp. in ... –80 and 90–130 cm. In 2007/08, a single mode was observed, at approximately 50–80 cm. In 2008/09 ... the Year-of-the-Skate, and the protocol in CCAMLR-XXVII, paragraph 4.55, was implemented. 20. In ...
Document : Site Section: Publications