Search results
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Changes in biomass of eight species of finfish around the South Orkney Islands (Subarea 48.2) from three bottom trawl surveys
for the eight species of finfish which were most abundant in catches. Biomass levels and size composition from ... in catches. Biomass levels and size composition from the March 1999 trawl survey were compared to previous ... of finfish which were most abundant in catches. Biomass levels and size composition from the March 1999 ... yielded a catch of almost 140 000 tonnes of C. gunnari, supported mainly by 1973/74 and 1974/75 cohorts ... (Kock, 1991). Both cohorts were largely exhausted within two years, and overall catches declined ... by almost two orders of magnitude within a few years (Figure 1). Catches increased slightly in the mid ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 53–74 : Author(s): Jones, C.D., K.-H. Kock and E. Balguerías
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Refinements to the strategy for managing depleted fish stocks based on CCAMLR objectives
might be a by-catch limit in practice) would be set using whichever of these fishing mortalities ... for the projections using catches by weight, however, rather than applying fishing mortality. The catches by weight ... ) of the median of the current stock assessment. This series of catches was applied for each interval selected ... % probability of exceeding GNAl is the limiting value. The value is lower for the more uncertain estimate ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 467–475 : Author(s): de la Mare, W.K. and A. Constable
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Changes in the fish biomass around Elephant Island (Subarea 48.1) from 1976 to 1996
and Nicol, 1996; Table 1). Most of the catches of C. gunnari and probably all catches of N. rossii were ... Peninsula. By-catch species reported were bumphead notothenia (Gobionotothen gibberifrons), Scotia Sea ... ). From 1980 /81 onwards, catches declined considerably (Agnew and Nicol, 1996; Table 1). The area ... The analysis was primarily based on catch compositions (in weight and numbers) of 175 bottom trawl hauls ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 165–189 : Author(s): Kock, K.-H
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Krill biomass in Area 48 and Area 58: recalculations of FIBEX data
Marine Living Resources (CCAMLR) set precautionary catch limits for krill in Statistical Area 48 ... the precautionary catch limits, SC-CAMLR has requested that the FIBEX data should be re-analysed using the most ... is representative of the areas where kriU precautionary catch limits were set by CCAMLR, it should be stressed ... krill abundance (Anon., 1979). The biomass estimate used to set the precautionary catch limit ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 157–181 : Author(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
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Results of fish larvae sampling by means of fine-meshed samplers attached to a bottom trawl
of the abundance index, including most of zero catches, were recorded on the western and southwestern part ... of zero catches, were recorded on the western and southwestern part of the island shelf. Differences ... of zero catches, were recorded on the western and southwestern part of the island shelf. Differences ... 2). The whole catch from a sampler or a sample taken from it was sorted, fish larvae were counted ... C and D. Catches by 12 mm and 0.505 mm samplers in positions A and B were similar. The 12 mm sampler with the fine ... depth limit of haul 15P was, however, in shallow water. Generally low values of abundance were recorded ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 69-86 : Author(s): Ślósarczyk, W. and I. Wójcik
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Biomass of myctophids in the Atlantic sector of the Southern Ocean as estimated by acoustic surveys
species, Electrona carlsbergi, were found only in some limited areas. The bulk of the surveyed biomass ... only in some limited areas. The bulk of the surveyed biomass of myctophids was found to be within ... carlsbergi, were found only in some limited areas. The bulk of the surveyed biomass of myctophids was found ... . In the majority of cases, as shown by control tows, it accounted for more than 90% of the total catch. Besides ... catches north of 53°S E. carlsbergi accounted for 91 to 97% of the total biomass. The rest consisted ... 90% (by weight) of control catches consisted of myctophids, with E. carlsbergi accounting for about ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 417–431 : Author(s): Filin, A.A., K.V. Gorchinsky and V.M. Kiseleva
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Optimization of survey sampling design in the detection of interannual variability and prey size selectivity in the diet of penguins
and Gonzalez (1989): Variance Expected 80% Confidence Interval Limits Component Value Lower Upper aicp ... it was estimated on the basis of two people working for two and a half hours; 554 Cp is the cost of catching ... . For this reason, 80% confidence limits were used in order to achieve the desired power of the test. In our case ... , the upper limit for optimal numbers has been calculated using the following expressions, where sub-indices ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 551–559 : Author(s): Marschoff, E. and B. Gonzalez
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Revised age and growth estimates for Antarctic starry skate (Amblyraja georgiana) from the Ross Sea
starry skate (Amblyraja georgiana) is frequently taken as by-catch in the Ross Sea fishery ... of rattail (Macrourus spp.) and skate by-catch, and analysis of standardised CPUE, for the exploratory ... limit to ages that can be determined from shark vertebrae? Mar. Freshw. Res., 58: 10–23. Gallagher ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 211–220 : Author(s): Francis, M.P. and M.J. Gallagher
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Comparative feeding ecology of Patagonian toothfish (Dissostichus eleginoides) in the southwestern Atlantic
whale s t o m a c h conten ts , r e p o r t e d t h e s o u t h e r n distribution limit ... , mean catch rates of up to 5 tonnes/hour have been reported by Otero et al. (1982) during spring ... "S, in the Malvinas/Falklands current, though reported mean catch rates are less than 0.3 tonnes/hour (Otero et al ... ., 1982). Commercial catches of D. eleginoides in this region have increased markedly, from 133 tonnes ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 105–124 : Author(s): García de la Rosa, S.B., F. Sánchez and D. Figueroa
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Line weights of constant mass (and sink rates) for Spanish system Patagonian toothfish longline vessels
on the fishing grounds, the Spanish system is reputed to catch more fish than the Chilean method (the former ... is true. To maximise fish catch rates, fish- ers may choose which method to use depending on fish ... the R software package (R Development Core Team, 2006). The limit of 17 s was the maxi- mum time for which all ... will improve fish catch rates. The chemical attractants in mackerel bait areThe chemical attractants ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 93–106 : Author(s): Robertson, G., C.A. Moreno, E. Gutiérrez, S.G. Candy, E.F. Melvin and J.P. Seco Pon