Search results
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Comparative feeding ecology of Patagonian toothfish (Dissostichus eleginoides) in the southwestern Atlantic
/slope, the occurrence of fish prey was 94.3OiOF for males and 95.6%F for females and consisted mainly ... Paper Title: Comparative feeding ecology of Patagonian toothfish (Dissostichus eleginoides) in ... the southwestern Atlantic Abstract / Description: The diet of Patagonian toothfish (Dissostichus ... Argentinian continental shelf/slope, the length of D. eleginoides ranged from 30 to 95 cm total length (TL ... juvenile and adult stages, and ranged between 18 and 212 cm TL. The diets of fish of various sizes and both ...
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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Seabird by-catch by autoline vessels: do line setters increase the sink rate of integrated weight longlines?
Paper Title: Seabird by-catch by autoline vessels: do line setters increase the sink rate of ... . A trial was conducted in the Ross Sea to determine the effectiveness of line setters in increasing ... the sink rates of IW longlines. Time-depth recorders were deployed on lines set with and without a ... line setter using a paired-treatment design. Sink rates of longlines set with and without a line setter ... distance, which amounted to about 100 s of setting time (at 6 knots 3.1 m s–1), was chosen to ensure the ... the anchor at the beginning of lines. The water entry times of each TDR were recorded to the ... structure. For each of these last two sub-models, separate variance parameters at each depth were combined ... of IW longlines is that IW lines (which are heavier than UW lines) deployed loosely and at a ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 107–114 : Author(s): Robertson, G., J. Williamson, M. McNeill, S.G. Candy and N. Smith
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Acoustic estimates of krill biomass in the Elephant Island area: 1981–1993
Paper Title: Acoustic estimates of krill biomass in the Elephant Island area: 1981–1993 Abstract ... / Description: Acoustic estimates of krill biomass in the vicinity of Elephant Island are presented for the ... years 1981 to 1993 (with the exception of 1982 and 1986). Estimates for 1981 to 1991 are based on ... previous reports adjusted for the recently proposed definition of krill target strength (Greene et al ... Demer At the 1992 meeting of the CCAMLR Working Group on Krill (WG-Krill) a table of historical ... 1985. Klindt used the BIOMASS (1986) definition of target strength at 120 kHz adjusted to 150 kHz ... corresponding to the difference in target strength at 120 kHz using the modal krill lengths for each of the ... corresponding to the difference between the BIOMASS (1986) definition of target strength at 50 kHz and a ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 1–5 : Author(s): Hewitt, R.P. and D.A. Demer
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The Patagonian toothfish (Dissostichus eleginoides) fishery in the Kerguelen Islands (Indian Ocean sector of the Southern Ocean)
the CPUE (Figure 4). Trawl CPUE fluctu- ated a good deal between 1983 and 1991, ranging from 1 tonne/hour ... (Indian Ocean sector of the Southern Ocean) Abstract / Description: Patagonian toothfish (Dissostichus ... recently with longliners. This is the oldest fishery targeting D. eleginoides in the Indian Ocean sector of ... local overfishing. The expansion of the bathymetric range of the fishery to increasingly deeper waters ... distribution, timing and area of spawning, and movements between geographical sectors) on the adult section of ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 1–25 : Author(s): Lord, C., G. Duhamel and P. Pruvost
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The CCAMLR-2000 Krill Synoptic Survey: a description of the rationale and design
Paper Title: The CCAMLR-2000 Krill Synoptic Survey: a description of the rationale and design ... Abstract / Description: The design of the CCAMLR-2000 Krill Synoptic Survey (CCAMLR-2000 Survey) is ... described. The primary objective of the survey was to improve estimates of the pre-exploitation biomass of ... the north of the Antarctic Peninsula (CCAMLR Statistical Subareas 48.1,48.2,48.3 and 48.4). Within ... . The grid shift was chosen by picking one of these potential grid positions at random. Tl-te same ... time at each station and make any necessary adjustments in the following order of priority ... the for the given dates for set positions on each expected time at the approxilllate mid-point of ... current transect and recommence surveying at the start of the next; else, To facilitate cruise planning ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 1–23 : Author(s): Trathan, P.N., J.L. Watkins, A.W.A. Murray, A.S. Brierley, I. Everson, C. Goss, J. Priddle, K. Reid, P. Ward, R. Hewitt, D. Demer, M. Naganobu, S. Kawaguchi, V. Sushin, S.M. Kasatkina, S. Hedley, S. Kim and T. Pauly
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Significant conservation benefits obtained from the use of a new fishing gear in the Chilean Patagonian toothfish fishery
., 2006). They also oper- ate further north in the region so have fewer inter- actions with toothed whales ... Paper Title: Significant conservation benefits obtained from the use of a new fishing gear in the ... practically eliminated depredation of fish by killer whales (Orcinus orca) and sperm whales (Physeter ... macrocephalus). The performance of this fishing technique with regard to seabird mortality and depredation by ... the implementation of the modification. The number of seabirds killed in 2002 was 1 542 compared to ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 79–91 : Author(s): Moreno, C.A., R. Castro, L.J. Mújica and P. Reyes
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Estimation of krill (Euphausia superba) mortality and production rate in the Antarctic Peninsula region
21.0 15.43 Size of Survey Area (n miles2) 14300 97200 78940 88230 93800 Size ofKrill Area (%) 64 35 ... Paper Title: Estimation of krill (Euphausia superba) mortality and production rate in the ... data of an identical survey with RV Polarstern in 1987/88. Seasonal variation between summer and winter ... abundance/biomass data exceeded a factor of 1:35, while inter-annual variability between available surveys ... reached only a factor of 1:1.6. Krill mortality was calculated by linearized catch curve analysis and ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 159–176 : Author(s): Siegel, V.
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Distribution of krill (Euphausia superba Dana) catches in the South Shetlands and South Orkneys
Paper Title: Distribution of krill (Euphausia superba Dana) catches in the South Shetlands and ... South Orkneys Abstract / Description: A set of concentric zones of 20 km width was defined around ... selected colonies of penguins distributed around the coasts of the South Shetland and South Orkney Islands ... distribution in Subarea 48.2, probably as a result of more variable hydrographic conditions. About 50% of the ... -exploitation brought at least some stocks to the verge of extinction. A further concern was that harvesting ... species is estimated as within a 10 to 90 km radius of breeding sites at these times of year: Ad6lie ... occurs at levels of fishing mortality that are lower than natural mortality. The assumption here is that ... predator populations are utilising the food resource (krill) at levels of natural mortality that allow the ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 287–303 : Author(s): Agnew, D.J.
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Feeding and food intake of Electrona carlsbergi (Tåning, 1932) Myctophidae
Paper Title: Feeding and food intake of Electrona carlsbergi (Tåning, 1932) Myctophidae Abstract ... by various methods was from 3.7 to 5.6% of fish body weight. The amount of food consumed by E ... . carlsbergi during the year in the waters to the south of the Antarctic Convergence is about 15 times fish ... during the cruise of RV Artemida. A sample of at least 25 fish were taken from every catch for ... basic data for estimation of the annual and mean daily food intake of fish at age 2 and 3. The annual ... 109.6 g or 1 480% of body weight. The annual food intake of females is estimated at 86.9 kcal. This ... 20.30 - 0.30 4 17.1 - 7.9 x at a digestion rate of 16.40/000 per hour xx at a digestion rate of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 411–416 : Author(s): Gerasimova, O.V.
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The sensitivity of multiple output statistics to input parameters in a krill–predator–fishery ecosystem dynamics model
Paper Title: The sensitivity of multiple output statistics to input parameters in a krill ... Drake Passage. The model analysed here required 2 311 input values for each of four scenarios and ... the status of predator groups more than they affected statistics indicating the status of the target ... recruitment through pre-recruit mortality. A parameter mediating the effect of a forcing function on krill ... abundance at beginning of fishing period. Krill Whole model Health (II.3(b) maintenance of the ... abundance of the relevant component is <75% of the abundance in equivalent no-fishing trials at the end ... equivalent no-fishing trials at the end of the recovery period. Predators SSMU Services (II.2 the term ... (via environment) 0 to 1 κ κk,i,s Krill density at which predators achieve half of maximum ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 97–118 : Author(s): Hill, S.L. and J. Matthews