Résultats de la recherche
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Use of the Leslie stock depletion model for the assessment of local abundance of Patagonian toothfish (Dissostichus eleginoides)
used to examine local patterns in catch per unit effort (CPUE) in the longline fisheries for Patagonian ... modelled using a linear regression of catch per hook against cumulative catch, when single vessels operate ... catchability and insufficiently high catch to cause local depletion. Suggestions are made for further work ... , Chile Abstract The Leslie depletion model has been used to examine local patterns in catch per unit ... analyses to examine whether declines in CPUE can be modelled using a linear regression of catch per hook ... against cumulative catch, when single vessels operate in localised areas for periods of at least three ... catch to cause local depletion. Suggestions are made for further woyk. Resume Le modele ...
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
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Analysis of trends in Japanese krill fishery CPUE data, and its possible use as a krill abundance index
krill abundance index Abstract / Description: Haul-by-haul logbook catch and effort data from the ... definitions of effort and catch-per-unit-effort (CPUE), variables were modelled using linear mixed models in ... between ‘catch per searching time’ and ‘catch per day’ within their lower ranges, suggesting these may ... -ku Shizuoka, 424-8633 Japan Abstract Haul-by-haul logbook catch and effort data from the Japanese ... of effort and catch-per-unit-effort (CPUE), variables were modelled using linear mixed models in ... observed between ‘catch per searching time’ and ‘catch per day’ within their lower ranges, suggesting ... could be used to give a catch-per-unit-effort (CPUE) index that is a good predictor of krill abundance ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 1–28 : Auteur(s): Kawaguchi, S., S. Candy, S. Nicol, K. Taki and M. Naganobu
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Length-based assessments revisited – why stock status and fishing mortality of long-lived species such as toothfish cannot be inferred from length-frequency data alone
about using unstandardised catch rate data have led to a desire to draw inferences about stock status ... - cautionary catch limits. The intent of the data col- lection is to provide sufficient data from research and ... the precautionary catch limits. For new and exploratory fisheries of Patagonian toothfish ... referenced catch and effort data, catch length-frequency data, tag-recapture data, and otoliths or scales ... , 2010, paragraph 5.7). However, robust advice on catch limits according to CCAMLR decision rules has ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 57–73 : Auteur(s): Ziegler, P.E., D.C. Welsford and A.J. Constable
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A proposed management procedure for the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity
, whereas catch-at-length information indicates that past catches have had relatively little impact on ... results of the trials. Given the importance of an adequate catch rate for the economic viability of the ... a catch rate increase, whatever the current resource status. MP performance is reasonably robust ... -recruitment curve steepness h is low. These tests also indicate that monitoring of future catch-at-length ... Islands region is unclear because CPUE data suggest considerable depletion, whereas catch-at-length ... the trials. Given the importance of an adequate catch rate for the economic viability of the fishery ... catch rate increase, whatever the current resource status. MP performance is reasonably robust across a ... curve steepness h is low. These tests also indicate that monitoring of future catch-at-length ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 33–69 : Auteur(s): Brandão, A. and D.S. Butterworth
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An assessment of the impact of krill fishery on penguins in the South Shetlands
krill catch is very low in December while the catch rate for the following three months is roughly ... tonnes/10-20-day period), the present catch rate (≤10 x 10 3 tonnes/1O-day period) is smaller by one or ... an adverse impact on the local krill biomass, and hence on penguins, when catch levels are also taken ... on available information on the fishery, penguins and krill. The krill catch is very low in December ... while the catch rate for the following three months is roughly constant (3 000 to 10 000 tonnes/lO-day ... catch rate (110 X 103 tonnes/lO-day period) is smaller by one or more orders of magnitude within the ... biomass, and hence on penguins, when catch levels are also taken into account. Resume La concurrence ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 107–128 : Auteur(s): Ichii, T., M. Naganobu and T. Ogishima
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Results of a longline survey on seamounts in the southeast Atlantic and in Subarea 48.6 and Division 58.4.4
toothfish (Dissostichus eleginoides), with 2 822 individuals caught (83% of total catch). Grenadiers of the ... genus Macrourus were the second most abundant taxon (248 individuals). The total catch by weight was ... with the highest catch (weight) per unit effort was 600 to 800 m, although absolute values varied ... between areas. Catch per unit effort ranged from a maximum value of 359 kg/1 000 hooks on Ob and Lena ... eleginoides), with 2 822 individuals caught (83% of total catch). Grenadiers of the genus Macrourus were the ... second most abundant taxon (248 individuals). The total catch by weight was 21.430 tonnes, of which D ... catch (weight) per unit effort was 600 to 800 m, although absolute values varied between areas. Catch ... eleginoides, by-catch, seamounts, Subarea 48.6, Division 58.4.4, CCAMLR INTRODUCTION A bottom longline ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 99–116 : Auteur(s): López Abellán, L.J. and J.F. González Jiménez
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Species identification and age estimation for the ridge-scaled macrourid (Macrourus whitsoni) from the Ross Sea
whitsoni) from the Ross Sea Abstract / Description: Samples of macrourid rattail by-catch from the ... , Wellington New Zealand Abstract Samples of macrourid rattail by-catch from the toothfi sh fi shery in the ... than 1% of the catch. Macrourids, almost exclusively Macrourus whitsoni, comprised a substantial by ... -catch of the fi shery and accounted for about 10% of total landed weight (Hanchet et al., 2002). In ... -catch, the species is clearly of com- mercial importance, and is in need of monitoring and management ...
Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 37–51 : Auteur(s): Marriott, P., P.L. Horn and P. McMillan
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Some aspects of the relation between Antarctic krill abundance and CPUE measures in the Japanese krill fishery
catching “green” krill. These factors result in Catch-per-Day and Catch-per-Haul measures being unlikely to ... index krill abundance. During the high season, Catch-per-Towing-Time seems likely to index only within ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 109–125 : Auteur(s): Butterworth, D.S.
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Preliminary report on biological observations and exploratory fishing data collected in the South Georgia area during the 1985/86 cruise of MT Carina
mesh sizes (47 and 60 mm) were used with a bottom trawl of 32 m head rope. Catch data were collected in ... determinations. The total catch with 60 mm mesh size codends was 1305.4 tons with a mean CPUE of 1822 kg/hour. C ... . gunnari comprised the bulk of the catch (62.5%), C. aceratus, P. georgianus and N. gibberifrons, 7.5 to 14 ... % while N. rossii and D. eleginoides were present only as by-catch. In sampling catches two length groups ... mm) were used with a bottom trawl of 32 m headrope. Catch data were collected "in 249 hauls using ... age determinations. The total catch with 60 mm mesh size codends was 1305.4 tons with a mean CPUE of ... 1822 kg/hour. C. gunnari comprised the bulk of the catch (62.5%), C. aceratus, P. georgianus and N ... . gibberifrons, 7.5 to 14% while N. rossii and D. eleginoides were present only as by-catch. In sampling ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 65-97 : Auteur(s): Kreft, K. and J. Szynaka
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Significant conservation benefits obtained from the use of a new fishing gear in the Chilean Patagonian toothfish fishery
sperm and killer whales on fish catch rate was assessed during September–December 2006. The results were ... zero in 2006; there was also a reduction in depredation of the catch from a maximum of 5% in 2002 to a ... maximum of 0.36% of the total catch in 2006. The fishers who developed the net sleeve modification called ... to seabird mortality and depredation by sperm and killer whales on fish catch rate was assessed ... depredation of the catch from a maximum of 5% in 2002 to a maximum of 0.36% of the total catch in 2006. The ... catch, or the aggregation of individuals around the ves- sel with no apparent connection to fishing ... depre- dation with ‘almost the entire catch’ lost from some lines. Off Chile, sperm whales have been ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 79–91 : Auteur(s): Moreno, C.A., R. Castro, L.J. Mújica and P. Reyes