Search results
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Histological study on the ovarian development of mackerel icefish (Champsocephalus gunnari) from the South Georgia Islands
nOXOXU Ha CTaAMH) CO3peBaHMX, 3TUX XUYHUKaX BCTpeYaJIOCb Man0 aTpeTUYeCKUX OOqUTOB, B TO BpeMX KaK ... and 20 to 1 050 g respectively. The age groups of the specimens ranged from two to five years ... . This Study Primary growth phase: Previtellogenic oocyte (I) Secondary growth phase: Early primary ... vitellogenesis (11) Advanced primary vitellogenesis (111) Early secondary vitellogenesis (IV) Advanced ... using microscopes (microscopical scale) was elaborated and adapted to correspond with the macroscopic ... (i.e., unaided visual observation) scale commonly used. The first five stages correspond with those ... individuals (45%) was found, together with a relatively low occurrence of females that spawned or were in ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 35–49 : Author(s): Macchi, G.J. and E.R. Barrera-Oro
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Calibration of an acoustic echo-integration system in a deep tank, with system gain comparisons over standard sphere material, water temperature and time
Man Storaga 0eYI0es ETHERNET FAN~ BOX Power SUpplies Post-ProcassIng WorkatallDn Figure ... Paper Title: Calibration of an acoustic echo-integration system in a deep tank, with system gain ... outlines the theory and procedures for calibrating an echo integration acoustic system with a standard ... sphere. It presents the results of an extensive calibration of a Simrad EK500 scientific echosounder with ... with the Cu sphere are, with the exception of the long pulse length, lower than those from the WC ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 127–144 : Author(s): Demer, D.A. and R.P. Hewitt
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Southern elephant seals and CCAMLR
, many of which make short feeding trips throughout the summer. At lIes Kerguelen and Heard Island ... , R.W. 1962. Elephant seals on Marion Island. African Wildlife 16: 191 - 198. SKINNER, J.D. & R.J ... been recently confirmed for the Macquarie Island stock. The availability of food, competition with ... rapidly growing fur seal populations and competition with fishing fleets have all been suggested as ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 465-473 : Author(s): Bester, M.N. and D.G.M. Miller
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On reproduction of Electrona carlsbergi (Tåning)
Convergence, wherein it forms concentrations during the major part of the year (Hulley, 1981; Naumov et al ... transformations have been completed and a thin layer of cytoplasm develops in oocytes. Later, the growth ... . In oocytes of 100 to 500 J.Ill1 in diameter small vacuoles appear in a peripheral zone and later form ... of spawned eggs by reserve oocytes which may be developed into successive batches of eggs for later spawning ... . Maturation of ovaries is continuous, and spawning is serial. The spawning season is long and coincides with ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 397–409 : Author(s): Mazhirina, G.P.
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Variations in echosounder calibration with temperature, and some possible implications for acoustic surveys of krill biomass
. Simmonds, E.J. 1990. Very accurate calibration of a vertical echo sounder: a five-year assessment ... Paper Title: Variations in echosounder calibration with temperature, and some possible ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 273–281 : Author(s): Brierley, A.S., C. Goss, J.L. Watkins and P. Woodroffe
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Distribution and abundance of Macrourus carinatus on BANZARE Bank in the southern Indian Ocean
of the family Macrouridae (rat tails and grenadiers) have become common by-catch species in recent years due ... . 1995. Distribution and biology of five grenadier fish (Pisces: Macrouridae) from the upper and middle ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 171–178 : Author(s): van Wijk, E.M., A.J. Constable, R. Williams and T. Lamb
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Analysis and modelling of the Soviet Southern Ocean krill fleet, II: Estimating the number of concentrations and analytical justification for search data
computations are performed, using data collected by Soviet research/survey vessels in the early 1980s ... in the early 1980s. These examples highlight the need for a navigational log as well as a fishing log in order ... collected by Soviet research/survey vessels in the early 1980s. These examples highlight the need ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 283–322 : Author(s): Mangel, M.
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Seal mitigation measures on trawl vessels fishing for krill in CCAMLR Subarea 48.3
by the Top Ocean during the trip. The only mitigation measure em ployed during hauls 1 to 81 was to change ... immediately after the escape opening. This opening was later increased to 1 m to allow seals to escape more ... DEFRA (Department for the Environment, Food and Rural Affairs). 2003. Adapted from the report: UK ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 195–205 : Author(s): Hooper, J., J.M. Clark, C. Charman and D. Agnew
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Observation of seabirds in the Southern Ocean in 1988/89
been due to the season (late summer/early autumn) as well as severe ice conditions. In this region ... to the eastern part of the Ross Sea along the Antarctic coast. It should be noted that thin new ice with an ice ... recorded per observation shift. The number of snow petrels per shift reached 50 only in the eastern part ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 521–542 : Author(s): Vagin, A.V. and V.V. Popov
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A fine-scale model of the overlap between penguin foraging demands and the krill fishery in the South Shetland Islands and Antarctic Peninsula
in Subarea 48.1 has been of concern to CCAMLR for a number of years,. especially for those predators which ... between years, and that 75 to 90% of the total catch for the subarea was taken between December ... and March within 100 km of shore-based penguin breeding colonies each year. December to March is the peak ... described by a uniform distribution within a lateral range determined by minimum and maximum bearings ... the krill resource and is based on a detailed model of penguin foraging patterns combined with catch ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 99–110 : Author(s): Agnew, D.J. and G. Phegan