Résultats de la recherche
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Use of a population model to assess the impact of longline fishing on wandering albatross populations
Abstract: An age-structured model of a wandering albatross Diomedea exulans population is ... rate of 2.29% per year, which concurs with global population trends. Sensitivity analyses of model ... investigate the potential impacts of new longline fisheries such as that for Patagonian toothfish Dissostichus ... population. Also, because wandering albatrosses are long-lived, population growth rates take approximately 30 ...
Meeting Document : WG-IMALF-94/08 : Auteur(s): Coleen L. Moloney, John Cooper, Peter G. Ryan and W. Roy Siegfried (South Africa)
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e-cc-vii-aH.pdf
... 1989/90 fishing season, the Committee recommends that the Executive Secretary be asked to review ... inspectors shall be communicated to the Commission by 1 May each year. Designations shall remain valid ... until July 1 of the following year. II. The Commission shall maintain a register of certified ... observers and inspectors to each Contracting Party by 31 May each year. III. In order to verify
application/pdf attached to:SCOI-88Meeting Report : SCOI-88
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e-sc-xxviii-a10.pdf
... not occur over a time scale of 20–30 years. Therefore, where estimates of maximum longevity for the ... been observed 20 or 30 years post impact (Clark et al., in press). 3.10 The Workshop agreed that ... the ‘CCAMLR VME Taxa Classification Guide’ and should be submitted for review by WG-EMM and WG-FSA ... the pro-forma notification in Conservation Measure 22-06, Annex 22-06/A. Such an investigation
application/pdf attached to:WS-VME-09Meeting Report : WS-VME-09
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e-sc-xxiv-a4.pdf
... trajectories were generated starting from an age 1+ mean length for different scenarios of winter and spring ... Working Group agreed that considerable progress had been made this year sufficient for it to believe that ... program for archiving with the Secretariat. The Secretariat will develop an index based on this series ... an important question that arose from the CEMP review, namely whether a single site is
application/pdf attached to:WG-EMM-05Meeting Report : WG-EMM-05
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Champsocephalus gunnari stock status in the South Georgia area
/ Description: ata of age composition and fishing effort for 1976/77-1987/88 were used to analyse stock status ... intensity was F 0.1. In the first two cases TAC=25-30 thousand tonnes and stock size does not change. For ... recruitment was taken at the lowest possible level for all these years (400 million specimens). Catch-per-unit ... and TAC for C. gunnari. Stock estimates were obtained using VPA with the following variations: mean F ... was FO.1• In the first two cases TAC=2S-30 thousand tonnes and stock size does not change. For the ... C12ellHHH: B0312acT 2 90 2 20 2 60 3 60 1980/81 1981/82 1982/83 1983/84 17,02 5,87 25,97 98,63 71,49 ... individuals). Biomass (thousand tonnes). Stock status and T AC prediction if F is an average value for the ... possible level for all these years (400 million specimens). Catch-per-unit-effort was also taken at the ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 1-18 : Auteur(s): Borodin, R. and P. Kochkin
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Geographical differences in the condition, reproductive development, sex ratio and length distribution of Antarctic toothfish (Dissostichus mawsoni) from the Ross Sea, Antarctica (CCAMLR Subarea 88.1)
South shelf North South break South shelf 100 90 80 70 60 50 40 30 20 10 0 North South break ... Fulton’s condition index (K) has been calculated for the five sampling seasons. This index assumes an ... with a 30 cm range over maturity (i.e. 85–115 cm TL). This equates to 50% maturity at about age 9. As ... . Table 4 shows the overall ratio of females to the total catch-weighted sample for each year from each ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 27–45 : Auteur(s): Fenaughty, J.M
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Size at sexual maturity of Patagonian toothfish (Dissostichus eleginoides)
(Dissostichus eleginoides) caught in the commercial fishery within Subarea 48.3. The results for 1996 indicate ... that L m50 occurs at 78.5 cm total length for male and 98.2 cm for female fish. In 1997 the results for ... male fish were essentially the same. For female fish there is evidence that in 1997 a significant ... allowing for this bias indicates that L m50 for female fish in 1997 was no different to that for 1996. The ... leading to an enlarged ovary of about 20% of the fish total mass. Spawning occurs in the period July to ... fit logistic models with an additional parameter for non-response (usually called 'immunity' in the ... language of bioassay - see Finney, 1978, Chapter 20) to cater for the situation where a proportion (propn ... errors) for 'spawners' based on an upper asymptote of l-propn. An estimate of population L,,,, (with ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 37–46 : Auteur(s): Everson, I. and A.W. Murray
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e-cc-xiv-a5.pdf
... Measures 69/XII and 80/XIII by fishing for Dissostichus eleginoides out of season in Subarea 48.3. The ... was suspended from its activities for the infringement of Conservation Measure 80/XIII. The sentence ... Observer and a report for the Commission is provided in CCAMLR-XIV/BG/20. 2.3 SCOI noted that a general ... amendment to the CCAMLR Convention and may also create an undesirable precedent for other international
application/pdf attached to:SCOI-95Meeting Report : SCOI-95
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e-sc-vii-a8.pdf
... with two papers to aid its discussions: ‘Research Programs of CCAMLR Members for 1988/89, 1989/90 and ... -Term Program of Work for the Scientific Committee’. A review of the research programs report by ... possible, for the next three years. The format to be used should be the same as the one agreed at the ... season but also activities anticipated for future seasons (e.g. 2–5 years). LONG-TERM INFORMATION
application/pdf attached to:WG-LTP-88Meeting Report : WG-LTP-88
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Krill biomass in Area 48 and Area 58: recalculations of FIBEX data
estimates of mean density and biomass for the Indian Ocean sector and the West Atlantic sector as well as ... for FAO Statistical Area 41, and CCAMLR Subareas 48.1, 48.2, 48.3, 48.6 and Division 58.4.2. Density ... workshop. Estimates for the different areas were also calculated using the target strength relationships of ... Green et al. (1990). The new estimates were on average 4.76 times larger than the old estimates for ... densities reported in Anon. (1986) were derived using a TS value of -68.10 dB for a mean animal length of ... - equation 3) to provide an estimate for transect density (Pk). The mean density by stratum (PA) weighted by ... laill for an interval (set either on the basis of time or on distance steamed) of ship's track was ... 3S'W 30'W 2S'W 20'W 1S'W r-------------------------~------------~------t_SO'S ...... 00 '1 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 157–181 : Auteur(s): Trathan, P.N., D.J. Agnew, D.G.M. Miller, J.L. Watkins, I. Everson, M.R. Thorley, E. Murphy, A.W.A. Murray and C. Goss