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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 : Автор(ы): 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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Management and uncertainty: the example of South Georgia
Paper Title: Management and uncertainty: the example of South Georgia Abstract / Description ... : Decisions on fishery management are often made with some degree of uncertainty in scientific advice. Such ... to consider ways in which CCAMLR can improve its ability to take decisions in the face of uncertainty ... . From an examination of Articles IX 2(f) and XV 2(e, d) of the CCAMLR Convention it follows that a ... the stock of Notothenia rossii is at an extremely low level. Proposals have been made in both the ... level at which they could provide sustained yields of y thousand tons per year, and that any other ... Figure 2 of the working party report it appears that mortality has increased from 0.11 to 0.76, i.e. at ... view would be to challenge the general interpretation, and look at some of the inconsistencies of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 341-353 : Автор(ы): Gulland, J.A.
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On reproduction of Electrona carlsbergi (Tåning)
Paper Title: On reproduction of Electrona carlsbergi (Tåning) Abstract / Description: This paper ... presents results from histological examinations of gonads of Electrona carlsbergi from the Atlantic sector ... of the Southern Ocean. From materials available it has been ascertained that E. carlsbergi spawns in ... the notal waters. Maturation of females begins when body length reaches 76 to 78 mm. Vitellogenesis is ... cytoplasm develops in oocytes. Later, the growth of oocytes occurs at the expense of an increase in the ... monolayer follicle. At the beginning of slow growth oocytes are usually of regular shape and have a ... intensity of colour in its different parts varies. At the end of the protoplasmatic growth period, the ... , the amount of trophic substance increases at the expense of accumulation of yolk granules of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 397–409 : Автор(ы): Mazhirina, G.P.
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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 : Автор(ы): Agnew, D.J.
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Low genetic diversity and temporal stability in the Antarctic toothfish (Dissostichus mawsoni) from near-continental seas of Antarctica
(Dissostichus mawsoni) from near-continental seas of Antarctica Abstract / Description: This study presents ... data on the DNA analysis of recent (2011–2013) samplings of Antarctic toothfish (Dissostichus mawsoni ... analysis of the most informative subset of nuclear genetic markers of SNP variation presented in Kuhn and ... Gaffney (2008), do not support genetic differentiation of samples from the Ross Sea. Discrepancies in the ... late 1990s and the fleet use mainly bottom-set longlines at depths of 1 200–1 800 m. Defining the ... -water) stage occurs when fish reach 100 cm in length and migrate to deep waters and stay at a depth of ... cycle protocol: a pre- liminary denaturation of DNA at 94°C for 1 min was followed by syntheses of DNA ... products: melt- ing at 92°C for 20 sec, annealing of primers at 55°C for 40 sec, DNA syntheses at 72°C for ...
Science Journal Paper : CCAMLR Science, Volume 21 (CCAMLR Science, Volume 21) : 1–9 : Автор(ы): Mugue, N.S., A.F. Petrov, D.A. Zelenina, I.I. Gordeev and A.A. Sergeev
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Comparative feeding ecology of Patagonian toothfish (Dissostichus eleginoides) in the southwestern Atlantic
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 ... . (1996) found larvae in the Malvinas/Falklands current during spring (September-December), at depths of ... main line of 20 000 m, with branch lines each with 90 hooks (model 'Ancora', 30 mm gap) spaced at 1 m ... conducted at a mean depth of 240.5 m, and 80% of the trawls in which this species occurred were made ... around 53'30's and 40"-42'30'W (Shag Rocks area) at a mean depth of 176 m. Duhamel and Pletikosic (1983 ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 105–124 : Автор(ы): García de la Rosa, S.B., F. Sánchez and D. Figueroa
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Significant conservation benefits obtained from the use of a new fishing gear in the Chilean Patagonian toothfish fishery
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 ... off South America. On some lines hauled at the Prince Edward Islands, south of South Africa ... of the baited hooks at the end of the hook lines with the position of a weight. Buoy ~1 000 m ... world’s population, of black-browed alba- trosses (Thalassarche melanophrys) which breed at the Diego de ... placed at 40 m intervals (Figure 2a). Each of the vertical branch lines supports multiple short hook ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 79–91 : Автор(ы): 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
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 ... sample. Total length (AT) was measured from the anterior margin of the eye to the tip of the telson to ... cruise, which also resulted at least five components. Results on the abundance of each age group are ... taken as an alternative way. This involves examining the age structure of the stock at one period in ... times, i.e. the winter stock was at a minimum level of 2.8% of the maximum observed summer stock. The ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 159–176 : Автор(ы): Siegel, V.
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Distribution, biomass and characteristics of the Euphausia superba fishery around South Georgia (Subarea 48.3)
Paper Title: Distribution, biomass and characteristics of the Euphausia superba fishery around ... many aspects of its variability have been extensively described in scientific literature. A summary of ... variability and the wide range of biomass values obtained which in turn leads to uncertainty in interpreting ... variability in the scale of krill swarms and to attempt to determine more reliable values of its biomass after ... transport krill to the South Georgia area which is located at the northern edge of its habitat (Marr, 1962 ... result of South Georgia being located at the edge of the habitat area in unusually low latitudes for ... trawl was employed at each station. The cross-section of the trawl opening at the level where fine mesh ... density of E. superba in fished swarms (g/m3) was worked out according to the size of the catch taken at ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 123–147 : Автор(ы): Latogursky, V.I., R.R. Makarov and L.G. Maklygin
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Preliminary appraisal of Antarctic fish selection by the 32/36 bottom trawl combined with various codends
Paper Title: Preliminary appraisal of Antarctic fish selection by the 32/36 bottom trawl combined ... with various codends Abstract / Description: Selectivity properties of single and doubler-layer twine ... codends (mesh size 120 mm) and single-layer tape codends with a mesh size of 60 and 100 mm were determined ... . It was found that the selectivity properties of twine codends are unsatisfactory in the case of ... 500 kilograms of fish, the investigated species constituted at least 20% of the total catch ... why small fish with lengths of 16-33 cm were retained at the same, equally high level in the double ... of small fish with a length of 20 and 21 cm at a 40-50% level and fish with a length of up to 35 cm ... first, depicting retention properties of fish up to 34 cm in. length at a - 12 - relatively high ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 1-48 : Автор(ы): Zaucha, J.
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