Search results
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Vertical migrations of mackerel icefish (Champsocephalus gunnari) on the South Georgia shelf
of fish feeding activity was also observed at night. Fishing during this period with bottom trawls ... had yielded almost no catches at all. The information obtained on vertical migrations of C. gunnari ... Paper Title: Vertical migrations of mackerel icefish (Champsocephalus gunnari) on the South ... Georgia shelf Abstract / Description: High values of coefficient of variation resulting from the ... trawling depth for mid water trawls was measured at the level of the trawl head-rope. Information from ... catches decreases abruptly from 13-14 to 2-8 tonnes per hour of fishing. At night, catches were usually ... 2.0 to 2.6 tonnes per hour of fishing. At sunrise, fish migrate to the bottom layers and catches ... again start to increase. The pattern of catch distribution for bottom trawls at various times of the ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 3–14 : Author(s): Frolkina, J.A. and V.I. Shlibanov
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Notothenia (P.) guntheri stock status and TAC estimation in the area of Shag Rocks (Subarea 48.3)
0,1950 0,0286 0,0367 0,1833 0,2479 0,0370 3 0,900 0,2333 0,0776 0,3797 0,6386 0,0735 0,0961 0,2957 ... commercially taken age groups (2-4 years); (b) Fishing intensity in the predicted period is at the level of ... demonstrates that at the current level of fishing (1987/88) the size of the stock of N. guntheri will remain ... Paper Title: Notothenia (P.) guntheri stock status and TAC estimation in the area of Shag Rocks ... (Subarea 48.3) Abstract / Description: Data on age composition of catches and fishing efforts for 1979/80 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 53-68 : Author(s): Shust, K. and R. Borodin
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Target strengths of Antarctic krill (Euphausia superba)
Mean Volume Backscattering Strength of encaged aggregations of swimming krill have been measured at 38 ... Paper Title: Target strengths of Antarctic krill (Euphausia superba) Abstract / Description: The ... and 120 kHz in a sheltered bay at South Georgia. The results indicate that the Target Strength values ... Backscattering Strength of encaged aggregations of swimming krill have been measured at 38 and 120 kHz in a ... encaged, otherwise free-swimming aggregations of krill at 38 and 120 kHz. In anticipation of submitting a ... harbour of the abandoned, and sadly vandalized, whaling station at Stromness on the island of South ... stored on a BAS data logger at the end of each interval. 4.3 Calibration On-axis calibration with ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 265–279 : Author(s): Everson, I., D.G. Bone, J.L. Watkins and K.G. Foote
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Status of the coastal stocks of Dissostichus spp. in East Antarctica (Divisions 58.4.1 and 58.4.2)
is associated with an extension of the slope northwards to cre- ate a relatively wide platform (Bruce Rise ... explores several methods for arriving at estimates of sustainable yields. Biological data suggest that ... between them being at about 90°E. The western stock may be centred around Prydz Bay, and appears to be of ... Paper Title: Status of the coastal stocks of Dissostichus spp. in East Antarctica (Divisions ... operating off the coast of East Antarctica (30°E–150°E; FAO/CCAMLR Divisions 58.4.1 and 58.4.2) since 2003 ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 71–100 : Author(s): Agnew, D.J., C. Edwards, R. Hillary, R. Mitchell and L.J. López Abellán
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Estimating optimal observer coverage in the Antarctic krill fishery
is proposed that an efficient sampling proportion, at least for South Georgia, should be >50% of ... / Description: Data collected as part of the CCAMLR Scheme of International Scientific Observation from ... estimate parameters of interest, in this case the mean (or median) krill length and the rate of larval fish ... : observers have been placed on approximately 50% of vessels fishing in any one season, and have been present ... Marine Fisheries Service of the USA (Barbeaux et al., 2005). Most observer schemes operate at least a ... ) is dependent on the relative variance components at each stage of the sampling design (Volstad et ... analysis (VCA) was then used to investigate the relative importance of sampling at either the inter ... observed at least once in the seven-year period, and the overlap of observed hauls with total hauls in ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 139–154 : Author(s): Agnew, D.J., P. Grove, T. Peatman, R. Burn and C.T.T. Edwards
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Genetic variations and population structure of krill from the Prydz Bay region of Antarctic waters
allele distributions at four polymorphic loci indicate no evidence of significant heterogeneity, a result ... of the Southern Ocean, suggesting that krill stocks over at least 6000 kilometres of Antarctic waters ... Paper Title: Genetic variations and population structure of krill from the Prydz Bay region of ... Antarctic waters Abstract / Description: Samples of Antarctic krill E. superba from six locations near ... allele distributions at four polymorphic loci indicate no evidence of significant heterogeneity, a ... the Atlantic sector of the Southern Ocean, suggesting that krill stocks over at least 6000 ... POPULATION STRUCTURE OF KRILL FROM THE PRYDZ BAY REGION OF ANTARCTIC WATERS C.M. MacDonald, R. Williams ... and M. Adams (Australia) Abstract Samples of Antarctic krill E. superba from six locations near ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 271-273 : Author(s): MacDonald, C.M., R. Williams and M. Adams
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Krill (Euphausia superba) distribution in relation to water movement and phytoplankton distribution off the northern South Shetland Islands
trips of fur seals rather long (5 to 9 days compared to 1 to 3 days later in the season) (AMLR, 1991 ... deployed at a level of 30 m from the surface because at this level krill concentrations are most frequently ... that in previous seasons. Total biomass of krill in shelf waters of the area surveyed was estimated at ... 1990/91 a survey was conducted by RV Kaiyo Maru in the vicinity of the South Shetland Islands and ... Elephant Island. The main objective of the survey was to investigate the mechanisms responsible for the ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 123–140 : Author(s): Ichii, T., H. Ishii and M. Naganobu
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Detection and quantitative estimation of krill concentrations by hydroacoustic instruments
capable of registering individual krill at a depth of 50–60 m while the vessel is in motion. According to ... theoretical calculations, the range of detection of individual specimens can be considerably increased at the ... Paper Title: Detection and quantitative estimation of krill concentrations by hydroacoustic ... instruments Abstract / Description: The limited capabilities of existing hydroacoustic instruments in ... individual krill at a depth of 50 - 60 m while the vessel is in motion. According to theoretical ... calculations, the range of detection of individual specimens can be considerably increased at the expense of ... spread over several miles and can be registered as one or a number of layers at different depths ... . At certain times of the year, krill aggregations stay close to the surface during daylight hours ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 123-139 : Author(s): Yudanov, K.I.
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Patagonian toothfish in international waters of the Southwest Indian Ocean (Statistical Area 51)
выборок на глубинах 360–1950 м. D. eleginoides присутствовал во всех выборках и его уловы варьировали от ... realizaron un total de 57 pescas, entre 360 y 1950 metros de profundidad. En todos los lances aparecieron ... located at the edge of the principal area of D. eleginoides concentration, in which a residual recruitment ... Paper Title: Patagonian toothfish in international waters of the Southwest Indian Ocean ... , following commercial fishing procedures, in a restricted area south of Madagascar and north of Prince Edward ... and Marion Islands and the Crozet Islands, outside EEZs and CCAMLR waters. A total of 57 hauls was ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 207–214 : Author(s): López Abellán, L.J
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Growth and age/length structure of populations of Notothenia (Lepidonotothen) squamifrons (Nototheniidae) in various areas of the Indian sector of the Southern Ocean
Paper Title: Growth and age/length structure of populations of Notothenia (Lepidonotothen ... ) squamifrons (Nototheniidae) in various areas of the Indian sector of the Southern Ocean Abstract / Description ... : Age, growth and age/length composition of populations of grey rockcod (Notothenia (Lepidonotothen ... ) squamifrons), inhabiting areas of the Ob and Lena Banks and the Kerguelen Island Shelf, are presented in this ... the last years of life. Maximum annual weight increments of 100 to 120 g at the banks and 153 to 188 ... , (Le. to the point at which the sclerites begin to merge). The results of the count were processed on ... considered normal at P=0.2. Moreover, single variable statistics of distribution of sclerites in each annual ... theoretical maximum length and one-third of its maximum body weight at the age of 9 years on the Lena Bank ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 123–139 : Author(s): Zaitsev, A.K.