Search results
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Catch-at-age analysis applied to new fisheries: the case of Dissostichus eleginoides
C TeM, 1.1 T06bI pa3pa60TaTb Bce06beMJIIOIl1YIO CXeMY B3SITHSI np06, pe3YJIbTaTbI KOTOPOti ... aHaJlH3a C nOMOIl1bIO ,llaHHbIX no COCTaBY YJIOBOB no B03paCTY, nOJIY1.IeHHbIX B pe3YJIbTaTe HaY1.IHO ... resource by coarse methods. The main aim of such surveys is to monitor fishing operations in order to ... a certain extent, limited by the complex fishing strategies of the operators and by the movements of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 3–9 : Author(s): Zuleta, A.V. and C.A. Moreno
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Length-at-age in juvenile Patagonian toothfish (Dissostichus eleginoides)
density was distinctly polymodal, to see whether ages estimated by reading otoliths were congruent with ... the length modes observed. Length densities by age were compared graphically with the overall length ... observed in the length density represent different age cohorts separated by one year. File: 01ashford.pdf ... pre-recruits, whose length density was distinctly polymodal, to see whether ages estimated by reading ... otoliths were congruent with the length modes observed. Length densities by age were compared ... cohorts separated by one year. Résumé À partir des otolithes d’un échantillon de pré-recrues de ... of Bedford’s (1983) method for scanning electron microscopy (SEM) use developed by Ashford et al ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 1–10 : Author(s): Ashford, J., C. Jones, S. Bobko and I. Everson
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The 1991/92 fishery for Dissostichus eleginoides in Subarea 48.3
November 1991 to 10 March 1992. A total of 3 382 tonnes was taken by one Bulgarian, five Russian and eight ... influenced by fishing depth, time of day or soak time, but was dependent on type of hook and geographical ... 0.2 in the Bulgarian. These differences were probably a result of the different hook types used by the ... tonnes was taken by one Bulgarian, five Russian and eight Chilean vessels. The maximum catch taken in a ... five-day period was 375 tonnes. Catch rate was not influenced by fishing depth, time of day or soak ... differences were probably a result of the different hook types used by the fleets. Resume En 1991/92, la ... when a total of 3 364 tonnes had been taken. A further 18 tonnes was taken by Bulgaria before it ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 31–48 : Author(s): Agnew, D.J. and C.A. Moreno
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Krill distribution in the western Atlantic sector of the Southern Ocean during 1983/84, 1984/85 and 1987/88 based on the results of Soviet mesoscale surveys conducted using an Isaacs-Kidd midwater trawl
Island. Surveys including from 158 to 202 stations were carried out by Soviet research vessels in the ... krill biomass distribution (g/1 000 m 3) and its mean values were analysed by subarea (Subareas 48.1 ... characterised by a change in biomass of more than two orders of magnitude in different seasons, was observed in ... in the island region during the 1983/84 season was caused exclusively by unfavourable oceanological ... Georgia Island. Surveys including from 158 to 202 stations were carried out by Soviet research vessels in ... m. Overall krill biomass distribution (g/ l 000 m3) and its mean values were analysed by subarea ... characterised by a change in biomass of more than two orders of magnitude in different seasons, was observed in ... krill in the island region during the 1983/84 season was caused exclusively by unfavourable ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 59–70 : Author(s): Sushin, V.A. and K.E. Shulgovsky
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Age, growth and mortality of Patagonian toothfish (Dissostichus eleginoides) caught off Kerguelen
off Kerguelen in 1999 were estimated by reading transverse-sectioned otoliths. Randomly interspersed ... estimated to be –0.6 years and residual variance 2.9. Age distributions of toothfish caught by two vessels ... depth or season. Age–length keys were constructed for use in assessing toothfish catches made by ... (Dissostichus eleginoides) caught off Kerguelen in 1999 were estimated by reading transverse-sectioned otoliths ... toothfi sh caught by two vessels showed discrepancies due to gear-specifi c catchability, or differences ... assessing toothfi sh catches made by trawlers and longliners at Kerguelen, and longevity was estimated to ... and recruitment (Jones, 1992). By monitoring these through time, fi shery man- agers can detect ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 29–41 : Author(s): Ashford, J., G. Duhamel, C. Jones and S. Bobko
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Distribution of the Soviet krill fishing fleet in the South Orkneys area (Subarea 48.2) during 1989/90
48.2) during 1989/90 Abstract / Description: The results of an analysis of haul-by-haul catch ... respectively), followed by a decrease to 6.9 and 7.1 tonnes/hour by May and June. The location of the fishing ... ground was observed to be stable, and it is considered that the location was determined by certain ... St. Kaliningrad 236000, Russia Abstract The results of an analysis of haul-by-haul catch ... /hour respectively), followed by a decrease to 6.9 and 7.1 tonnes/hour by May and June. The location of ... by certain hydrodynamic characteristics of the area, for example a complex current around the ... Atlantic Ocean. Subarea 48.1 (459 thousand tonnes), the main The total catch obtained by the Soviet ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 51–62 : Author(s): Sushin, V.A
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Surveys of breeding penguins and other seabirds in the South Shetland Islands, Antarctica, January-February 1987*
BI1Aa rrl1HrBI1HOB B paHOHe I1CCJIeAOBaHI1H, 6blJIO KaK MI1HI1MyM 1620000, QTO B 2,5 pa3a 60JIbWe, QeM ... known breeding localities of sheathbills and skuas by threefold, chinstrap penguins by twofold, and Cape ... petrels and shags by 50%. Our minimum estimate of 1 620 000 breeding chinstrap penguins, the most abundant ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 449-451 : Author(s): Shuford, W.D. and L.B. Spear
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An integrated stock assessment for the Patagonian toothfish (Dissostichus eleginoides) for the Heard and McDonald Islands using CASAL
) abundance estimates by length bin, commercial catch-at-length data, standardised CPUE series for the trawl ... grounds, and tag releases and recoveries by length bin, is described. The annual surveys are spatially ... functions for each ground by gear (trawl and longline) combination. Various combinations of dataset ... data. A key uncertainty is the number of ages fully selected by the main survey series. With all the ... CASAL and data consisting of multi-year random stratified trawl survey (RSTS) abundance estimates by ... releases and recoveries by length bin, is described. The annual surveys are spatially representative of ... functions for each ground by gear (trawl and longline) combination. Various combinations of dataset ... tag data. A key uncertainty is the number of ages fully selected by the main survey series. With all ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 1–34 : Author(s): Candy, S.G and A.J. Constable
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Preliminary results of investigations of the Federal Republic of Germany on Notothenia rossii marmorata (Fischer, 1885) in January/February 1985
survey carried out by FRV " Walther Hervig " in January/February 1985 was used to collect ... around South Georgia and Elephant Island and the extent to which the measures adopted by CCAMLR to ... been low, N. rossii around South Georgia is still largely affected by the fishery. Stock size is ... carried out by FRV "Walther Hervig" in January/February 1985 was used to collect further basic: data ... Georgia and Elephant Island and the extent to which the measures adopted by CCAMLR to rebuild the stock ... . rossii around South Georgia is still largely affected by the fishery. Stock size is probably still less ... abundant) fish species around South Georgia: large near surface concentrations had already been noted by ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/2 (Selected Scientific Papers, SC-CAMLR-SSP/2) : 33-57 : Author(s): Kock, K.-H.
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Age estimation and maturity of the ridge-scaled macrourid (Macrourus whitsoni) from the Ross Sea
the Ross Sea Abstract / Description: Juveniles of the macrourid Macrourus whitsoni were collected by ... work on this species. Von Bertalanffy growth models assuming different growth by sex and by year-within ... of the macrourid Macrourus whitsoni were collected by the NIWA research vessel Tangaroa during the ... models assuming different growth by sex and by year-within-sex were fitted separately to a revised ... exclusively Macrourus whitsoni, comprised a substantial by-catch of the fishery, accounting for about 10% of ... been caught (Hanchet et al., 2004). Although a by-catch, this species is clearly of com- mercial ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 291–303 : Author(s): Marriott, P.M., M.J. Manning and P.L. Horn