Documents

Numéro du document	Titre	Point(s) de l'ordre du jour
WG-FSA-94/01 Plus d'infos	Provisional Agenda and Annotation to the Provisional Agenda for the 1994 Meeting of the Working Group on Fish Stock Assessment (WG-FSA) Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/02 Plus d'infos	List of participants Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/03 Plus d'infos	List of documents Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/04 Plus d'infos	Dynamics of Notothenia rossii rossii size-age structure on the Kerguelen Islands shelf P.B. Tankevich (Ukraine) Résumé: Basing on materials of research expeditions and fishing cruises to the Kerguelen Islands shelf in the period from 1970 to 1991, dynamics of size- age structure of marbled rockcod (Notothenia rossii rossii) population is shown. Data on age determination for 1970-1989 (Tankevich, 1990) and the data collected in the joint Soviet-French expedition on board RTMA Orlinoye in May-Jine 1991 were used Read More Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/05 Plus d'infos	Analyses performed at the 1993 meeting of the Working Group on Fish Stock Assessment Secretariat Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/06 Plus d'infos	Preliminary results of mackerel icefish, Champsocephalus gunnari age determination by weight method I.B. Russelo (Ukraine) Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/07 Plus d'infos	Course of fisheries in the Lena Bank area (Division 58.4.4) in the season of 1990-91 A.K. Zaitsev (Ukraine) Résumé: In the season of 1990/1991, fishing operations in subarea 58.4.4. (Lena Bank) wer4e carried out by only one vessel - RTMA ZVEZDA KRYMA in April-June 1991. The total harvest in that period made 971 t of grey rockcod Notothenia squamifrons and 29 t of Patagonian toothfish Dissostichus eleginoides. The real catch excels the data in the Statistical Bulletin… nearly two-fold. In this connection it Read More Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/08 Plus d'infos	Preliminary results of age determination by otolith mass in mackerel icefish Champsocephalus gunnari Lonnberg 1905 in the Heard Island area (Australia) I.B. Russelo (Ukraine) Résumé: To determine mackerel icefish Champsocephalus gunnari age, otolith mass was used. The material was collected in July0August 1987 during the joint Soviet-Australian expedition on board R/V PROFESSOR MESYATSEV to heard Island shelf area. The otoliths were weighted with an electric balance to within 0.0001 g. Then the obtained data underwent statistical processing with application of the cluster Read More Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/10 Plus d'infos	Fish distribution and biomass in the Heard Island zone (Division 58.5.2) R. Williams and W.K. de la Mare (Australia) Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/11 Plus d'infos	Age-length key for Champsocephalus gunnari from Subarea 48.3, Dr Eduardo Holmberg survey, February/March 1994 E. Barrera-Oro, E. Marschoff and R. Casaux (Argentina) Résumé: An age-length key was prepared for Champsocephalus gunnari from the Subarea 48.3, based on the readings of otoliths randomly collected during the R/V Holmberg survey in Feb/Mar 1994. Small and medium sized fish (total length 12-33 cm) constituted the bulk of the samples (93%), while larger specimens (>33 cm) were scarce. At South Georgia, fish of age groups 1-4 were truly represented; at Read More Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/12 Plus d'infos	Validation of age determination in Notothenia coriiceps, by means of a tag-recapture experiment at potter cover, South Shetland Islands E.R. Barrera-Oro and R.J. Casaux (Argentina) Résumé: Of 409 Notothenia coriiceps specimens tagged and released at Potter Cove, South Shetland Islands, in successive years from 1989 to 1992, 9 were recaptured at the same site after periods of 11-21 months. A comparison was carried out between the annuli found in scales removed before and after the period of liberty. In scales of those specimens recovered after 11-13 months, one extra annulus was Read More Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/13 Plus d'infos	Areas of seabed within the 500 m isobath around Elephant Island (CCAMLR Statistical Subarea 48.1) K.-H. Kock and U. Harm (Germany) Résumé: Areas of seabed within 50m depth contours down to 100m and within 100m depth contours from 100 to 500m have been estimated from soundings obtained during plankton and bottom trawl surveys around Elephant Island (the northernmost island of the South Shetland Islands) from 1977/78 to 1992/93. The results are presented on a fine scale grid of 15’ lat x 30’ long. Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/14 Plus d'infos	The early life history of the Patagonian toothfish Dissostichus eleginoides Smitt, 1898 S.A. Evseenko (Russia), K.-H. Kock (Germany) and M.M. Nevinsky (Russia) Résumé: Patagonian toothfish, Dissostichus eleginoides, spawn over the continental slope from July to September. Eggs have been observed primarily in the upper part of the water column over 2200-4400 m bottom depth. Embryos in stage III and IV of their embryonic development are described. Hatching is likely to occur in October/November. Scales do not start to form before the fish are 64-74 mm long. Read More Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/15 Plus d'infos	The diet composition and feeding intensity of mackerel icefish (Champsocephalus gunnari) at South Georgia in January/February 1994 K.-H. Kock (Germany), I. Everson, L. Allcock, G. Parkes (United Kingdom), U. Harm (Germany), C. Goss, H. Daly (United Kingdom), Z. Cielniaszek and J. Szlakowski (Poland) Résumé: The diet composition and feeding intensity of mackerel icefish ( Champsocephalus gunnari) around Shag Rocks and the mainland of South Georgia was analyzed from 3,691 stomachs collected in January/February 1994. Main prey items were the amphipod hyperiid Themisto gaudichaudii, mysids (primarily Antarctomysis maxima), and krill (Euphausia superba) in the vicinity of South Georgia and T. Read More Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/16 Plus d'infos	Evidence of two stocks of Champsocephalus gunnari in the South Georgia region, CCAMLR fishing Area 48.3 A.W. North (United Kingdom) Résumé: In 1991, the 0 age-class of C. gunnari were sampled at Shag Rocks on 18 January, off Possession Bay, South Georgia during 19-20 January and off much of the north-east coast of South Georgia between to 19 January to 19 February. The size- frequency of fish at Shag Rocks contained two modes of 31-46mm and 55-87mm SL. however, off Possession Bay only one mode of 25-57mm SL was apparent. Fish Read More Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/17 Plus d'infos	Large variations in mackerel icefish (Champsocephalus gunnari) standing stock at South Georgia; are Antarctic fur seals (Arctocephalus gazella) the cause? I. Everson, G. Parkes, I. Boyd (United Kingdom) and K.-H. Kock (Germany) Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/18 Plus d'infos	Fish stock assessment survey in Subarea 48.3 D. Cielniaszek, J. Szlakowski (Poland), H. Daly, L. Allcock and G. Pilling (United Kingdom) Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/19 Plus d'infos	Software for FSA-94 Secretariat Résumé: As requested by the WG last year, the Secretariat circulated a list of software supported at the Secretariat with the Agendas and invitations to attend the working group. This document gives additional information on software and platforms available. Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/20 Plus d'infos	Summary of the Dissostichus eleginoides fishery in Subarea 48.3 in the 1993/94 season D.J. Agnew (Secretariat) Résumé: The progress of the fishery for Dissostichus eleginoides in Subarea 48.3 in the 1993/94 season is described. Fishing took place around Shag rocks and South Georgia, being concentrated in 4 of the 5 experimental areas. CPUE for 1994 appears similar to that from previous years except for Chilean vessels. Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/21 Plus d'infos	Revised estimates of yield for Electrona carlsbergi based on a generalised version of the CCAMLR krill yield model A.J. Constable and W.K. de la Mare (Australia) Résumé: Traditional methods for estimating yield per recruit as a function of fishing mortality can result in inappropriate high estimates of yield that could lead to depletion of stocks because of widely varying recruitment patterns, overestimation of the abundance of the stock and age of the most recent survey. These problems are addressed in this paper by using stock projections to assess the Read More Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/22 Plus d'infos	Determination of local density of Dissostichus eleginoides in Subarea 48.3 - CCAMLR protocol local depletion experiment Ihn Sung 66 - January 1994 C. Jones and G. Parkes (United Kingdom) Résumé: A long lining stock depletion trial was undertaken by the Korean longliner Ihn Sung 66 in January 1994 in accordance with CCAMLR Conservation Measure 69/XII and the Experimental Protocol circulated by the Secretariat in COMM CIRC 93/50. The results of this experiment are presented. Leslie and DeLury methods are tested using simulations to determine the most appropriate method. The Leslie Read More Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/23 Plus d'infos	Performance and geometry of the FP-120 trawl used during the UK 1993/94 fish stock assessment survey around South Georgia, Subarea 48.3 G. Pilling and G. Parkes (United Kingdom) Résumé: Methods for the calculation of the horizontal opening (swept area) of a bottom trawl are discussed. Details of the Scanmar trawl monitoring equipment used for making in situ measurements of horizontal opening and headline height of the FP-1 20 trawl during the 1993/94 UK fish stock assessment survey around South Georgia on the MV Cordella are provided. Empirical equations are derived for the Read More Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/24 Plus d'infos	Comments on the use of stock depletion models for the assessment of local abundance of toothfish in Subarea 48.3 and adjacent waters G. Parkes and G. Pilling (United Kingdom) Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/25 Plus d'infos	Preliminary results on by-catch of fish during krill fishery in March to May 1993 on the polish trawler M/T Lepus Z. Cielniaszek and R. Pactwa (Poland) Résumé: From the end of March to the beginning of May. 1993, during fishing operations for krill conducted by the m/t Lepus on the fishing grounds off South Orkney Islands: and South Georgia, investigations were• carried out to determine biological/fisheries characteristics of the exploited stocks. One of their goals was to determine the proportion of juvenile fish forms in krill concentrations. The Read More Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/26 Plus d'infos	Preliminary aspects of a simulation model to be used for evaluating the experimental crab fishery G. Watters (USA) Résumé: At the 1993 meeting of the Working Group on Fish Stock Assessment, members requested that work be undertaken to evaluate certain aspects of the experimental management strategy for the Antarctic crab fishery. A simulation model is proposed for conducting this work. Length frequency and catch rate data from the 1991/92 crab fishery are used to motivate the construction of an ontogenetic Read More Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/27 Plus d'infos	Diet composition of Champsocephalus gunnari in Subarea 48.3, Dr Eduardo Holmberg survey, February/ March 1994 E. Barrera-Oro, R. Casaux and A. Roux (Argentina) Résumé: The diet composition of the icefish Champsocephalus gunnari caught in the Subarea 48.3 in February/March 1994 was analyzed using the frequency of occurrence (%) method. Krill (Euphausia superba) followed by the amphipod hyperiid Themisto gaudichaudii were the main prey items at South Georgia and Shag Rocks; fish were found in the stomachs more frequently than in past seasons around South Read More Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/28 Plus d'infos	Preliminary study on reproduction in Champsocephalus gunnari from Subarea 48.3, Dr Eduardo Holmberg survey, February/March 1994 G.J. Macchi and E.R. Barrera-Oro (Argentina) Résumé: A preliminary histological analysis on the ovarian development in Champsocephalus gunnari was carried out. Six stages of oocytary development were identified and are similar to those described for other species. A gonad maturation scale was elaborated and adapted to the macroscopic scale commonly used. Oocytary resorption processes were observed during ovarian maturation. In some cases the Read More Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/29 Plus d'infos	Preliminary results of the E.L. Holmberg 1994 cruise to Subareas 48.3 and 48.2 E.R. Marschoff, B. Prenski, B. Gonzalez, C. Remaggi and C. Balestrini (Argentina) Résumé: A total of 63 hauls and 10 oceanographical legs were obtained. Of these, 44 hauls taken in Subarea 48.3 on a random stratified des n are used to estimate the standing stocks of the main commercial fish species along different methods, as well as their length frequency distributions. A change in surface water temperature of about -0.5 to -1.0 in a period of approximately 20 days was detected Read More Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/30 Plus d'infos	Addendum to document WG-FSA-94/10 R. Williams and W.K. de la Mare (Australia) Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/31 Plus d'infos	Depletion experiment of Dissostichus eleginoides stock in the south of South Georgia Island (Antarctica) P. Rubilar, C.A. Moreno (Chile) and J. Ashford (United Kingdom) Résumé: Ten hauling for Dissostichus eleginoides were performed from the 11lth to the 21 of April 1994, wich were related between them, when they contact within a circle of 10 nm of diameter, whose center was at 55° 03’ S 36° 53’ W. Leslie Method was applied to the data. initial biomass was projected to 3244.8 nm2, obtaining an estimated biomass of 937.8 ton. Due to statistical limitations of these Read More Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/32 Plus d'infos	Bottom trawling survey on the Ob and Lena Banks Observer (Ukraine) Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion
WG-FSA-94/9 Rev. 1 Plus d'infos	New data on spawning, hatching and growth of the Kerguelen Islands Champsocephalus gunnari shelf stock G. Duhamel (France) Résumé: Combined studies on the inner shelf and outer shelf of the Kerguelen islands (1989/90 to 1992/93) provides new informations about Champsocephalus gunnari stock. An inner shelf quaterly programme allows to identify each year, both from the ichthyoplanktonic surveys and bottom trawlings, an annual cohort. Strong differences in abundance of larvae are observed yearly. One cohort seems dominant in Read More Soumis par: Admin Admin (Secrétariat de la CCAMLR) Demander un document de réunion

WG-FSA-94

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