Search results
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Selectivity of commercial and research trawls in relation to krill
RT 72/308 and an Isaacs-Kidd midwater research trawl (IKMT). The commercial trawl catches contained ... more large krill (35-58 mm) than catches of the research trawl (30-54 mm). The maximum difference ... in mean length in catches made by both trawls was ∆L = 6.2 mm. Statistically significant variability ... in krill length composition was observed between catches made by the research trawl, while in commercial ... and an Isaacs-Kidd midwater research trawl (IKMT). The commercial trawl catches contained more large krill (35 ... -58 mm) than catches of the research trawl (30-54 mm). The maximum difference in mean length ... in catches made by both trawls was AL = 6.2 mm. Statistically significant variability in krill length ... composition was observed between catches made by the research trawl, while in commercial trawl catches krill ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 161–169 : Author(s): Kasatkina, S.M
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Hook selectivity in the longline fishery of Dissostichus eleginoides (Nototheniidae) off the Chilean coast
that the ratio of females increases significantly in catches, when the size of straight hooks is increased (e.g ... differences. It is worth noting that the ratio of females increases significantly in catches, when the size ... in significant differences. It is worth noting that the ratio of females increases significantly in catches ... catches of commercial interest for the fishery. After that, fish pots and gill nets were tested, proving ... that the longline method was far more efficient than others (Inostroza, 1975). During 1990, catches ... bait. For comparison all data were expressed in CPUE units defined as g/hook in each catch ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 107–119 : Author(s): Moreno, C.A.
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Composition and characteristics of ichthyofauna in pelagic waters of South Georgia (Subarea 48.3)
of 250 to 300 m, as well as demersal fishes in the pelagic stage of their life cycle. Catches contained ... both young and adult specimens of 42 species from 16 families. Numerically, catches were dominated ... in the pelagic stage of their life cycle. Catches contained both young and adult specimens of 42 species from 16 ... families. Numerically, catches were dominated by C. gunnari, Lepidonotothen larseni, Chaenocephalus ... of 250 to 300 m, as well as demersal fishes in the pelagic stage of their life cycle. Catches contained ... both young and adult specimens of 42 species from 16 families. Numerically, catches were dominated ... determining the size of the catch. RESULTS Species Composition of Catches The data collected were used ... fish of age group 1, which comprised 30-50% of catches, significant amounts of larger specimens ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 125–164 : Author(s): Frolkina, G.A., M.P. Konstantinova and I.A Trunov
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Age, growth and mortality of Patagonian toothfish (Dissostichus eleginoides) caught off Kerguelen
with depth or season. Age–length keys were constructed for use in assessing toothfish catches made ... keys were constructed for use in assessing toothfish catches made by trawlers and longliners ... catches made by trawlers and longliners at Kerguelen, and longevity was estimated to be 36 years. Total ... can be used to elucidate life-history strategies. Moreover, by taking advantage of data on catch ... from the catch taken in March 1999 off Kerguelen between depths of 500 and 1 500 m by the longliner ... of outliers. In addition, a catch curve based on a negative exponential model was used: Nt = N0e–Zt ...
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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Size at sexual maturity of Patagonian toothfish (Dissostichus eleginoides)
, 1993) was used to estimate L,,, together with fiducial limits (= confidence limits) for standard ... of L,,,,,, allow for a n asymptote of less than 1.0. Models and associated 95% confidence (fiducial) limits were ... a best estimate of L,,, = 78.5 cm with 95% confidence (fiducial) limits of 77.9 and 79.0 cm. Months ... though, as is the case for n 467 275 124 2 220 1 592 1 523 Confidence Limit male fish ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 37–46 : Author(s): Everson, I. and A.W. Murray
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The use of predator-derived krill length-frequency distributions to calculate krill target strength
to limit the comparison of prey availability and predator performance over equivalent temporal scales ... first become nutritionally independent, is often limited by logistic constraints on ship- board ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 155–163 : Author(s): Reid, K. and A.S. Brierley
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Integrating Count Effort by Seasonally Correcting Animal Population Estimates (ICESCAPE): a method for estimating abundance and its uncertainty from count data using Adélie penguins as a case study
series are typically collected at only a limited number of sites, so surrogate availability information ... at only a limited number of sites, so surrogate availability information for a site is used when none ... collected at only a limited number of sites, so surrogate availability information for a site is used when ... on known limitations of the work and plans for future improvements of the method. Models of time series ... are somewhat limited in that time series do not extend beyond 24 December 1990. In demonstrating the utility ... that, at the present time, the available pool of attendance curves is too limited in number for such subsetting ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 213–227 : Author(s): McKinlay, J., C. Southwell and R. Trebilco
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Preliminary results of a bottom trawl survey around Elephant Island in October and December 1987
the proportion of larger (= older) fish in the catches increased. Composition of the catches of C. gunnari ... in the catches increased. Composition of the catches of C. gunnari differed significantly from that in previous ... in the catches increased. Composition of the catches of C. gunnari differed significantly from that in previous ... 3.1 Catch Composition A total of 40 species was present in the catches (Table 1). Except ... cruises (see Nast et al., 1988). The catch of a number of egg capsules of Bathyraja sp. (most probably ... catch of 18.04 tonnes. The most abundant species in terms of biomass were Notothenia gibberifrons (57.7 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 185-200 : Author(s): Kock, K.-H.
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Analysis of krill trawling positions north of the South Shetland Islands (Antarctic Peninsula area), 1980/81–1999/2000
of factors such as krill distribution, density and colour, by-catch, environmental conditions etc ... enough to justify commercial fishing. Fishing operations also avoid salp by-catch (Kawaguchi et al ... should be negligible. The effect of salp by-catch may also be small in December, since the main period ... of observed salp by-catch around this area was January to March (Kawaguchi et al., 1998). Therefore ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 25–36 : Author(s): Kawaguchi, S. and K. Segawa
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Brief report of the joint Soviet-Australian expedition of the USSR FRV Professor Mesyatsev to the Australian fishing zone around the territory of Heard and McDonald Islands, May-August, 1987
of the catches. General Outline of Research Conducted during the Expedition: 1. Acoustic survey of the sea ... ). A detailed analysis of a sample from each catch was carried out. Analysis included: I a) measurement ... distinct in the layer deeper than 120m. Low catches at the end of July are related to the destruction ... the catches of mesoplankton in the conically reverse nets consisted mainly of Copepoda and ostracoda ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 75-103 : Author(s): Gherasimchook, V.V., V.N. Brodin, A.V. Kljausov, I.B. Russelo, P.V. Tishkov and N.B. Zaremba