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Variations in echosounder calibration with temperature, and some possible implications for acoustic surveys of krill biomass
Paper Title: Variations in echosounder calibration with temperature, and some possible ... VARIATIONS IN ECHOSOUNDER CALIBRATION WITH TEMPERATURE, AND SOME POSSIBLE IMPLICATIONS FOR ACOUSTIC SURVEYS ... x ~ o f i r eop rm AO a nocne caeMoK KpHnrr B TOM pafio~e H x a p a ~ ~ e p ~ 3 y e ~ c x s p e ... ~ P K T H K ~ AaHHblfi npu6op KaJIll6poBanI4 H B eBpone%cKog YaCTH YMepeHHbIX BOA. B 3 T H X 6onee ... , npeo6naf lamrq~~ B pagoae caeMea. K p o ~ e 3~01-0, H ~ O ~ X O A H M O TWaTeJlbHO I43YYHTb BOnpOC 0 ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 273–281 : Автор(ы): Brierley, A.S., C. Goss, J.L. Watkins and P. Woodroffe
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Low breeding success of the Adélie penguin at Béchervaise Island in the 1998/99 season
percent of nests with eggs failed during the three weeks following first hatch. A breeding success of 0.43 ... chicks cr6ched per nest was achieved, compared to previous seasons with higher annual breeding success ... , foraging trip duration and diet suggests that the death of chicks during the guard stage was due to an ... fewer local trips and both sexes spent longer at sea than in years of higher breeding success. Meal ... durations in 1998/99 were greater than all years Irvine et a1 Table 3: Mean foraging trip durations ... frequency. These findings contrast with observations made in 1994/95 (a season in which all chicks died of ... , mid-incubation count of all nests with eggs, brooded nest count during early guard, and a chick ... (Table 3). This compares to an average duration of 29.8 hours in 1993/94, a season with high breeding ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 151–167 : Автор(ы): Irvine, L.G., J.R. Clarke and K.R. Kerry
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A review of data on abundance, trends in abundance, habitat use and diet of ice-breeding seals in the Southern Ocean (submitted to the 2008 Joint CCAMLR-IWC Workshop)
represent the entire pack-ice. From the late 1960s to the early 1980s, Erickson and colleagues made a ... moulting. Breed- ing occurs in late spring and early summer, and moulting in mid- to late summer. For the ... seals often aggregate in larger groups in fast-ice habitats in early summer when breeding. Data on ... the late 1940s and early 1950s (Table 1). Laws (1953) estimated the abundances of the four species ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 49–74 : Автор(ы): Southwell, C., J. Bengtson, M. Bester, A.S. Blix, H. Bornemann, P. Boveng and M. Cameron, J. Forcada, J. Laake, E. Nordøy, J. Plötz, T. Rogers, D. Southwell, D. Steinhage, B.S. Stewart and P. Trathan
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Commercial krill fisheries in the Antarctic, 1973 to 1988
) fishery between 1972/73 and 1987/88. The annual krill catch rose gradually to a peak of some 500 000 ... (April to August). Trends in the fishery with respect to independent estimates of krill abundance and ... annual mean fishing effort was highest (Table 3). As with the Japanese fishery in Subareas 48.1 and ... , 1979). Exploratory fishing for krill as a commercial resource commenced in the early 1960's and ... split-years; a split-year being the twelve month period from 1 July in one year to 30 June in the next ... . The catch year is designated according to the second of the two split-years. Krill ST ATLANT data ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 229–281 : Автор(ы): Miller, D.G.M.
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Long-term trends in the foraging patterns of female Antarctic fur seals at South Georgia
number of feeding trips, with 1979 being the year with the fewest trips made during the entire 20 year ... utilizing tetracycline-marked teeth confirmed that the feeding trip/suckling cycles of females are reflected ... ) the number of feeding trips made by an individual’'s mother during lactation. This analysis ... showed that between 1962 and 1981 the mean number of feeding trips made by female fur seals varied ... feeding trips, with 1979 being the year with the fewest trips made during the entire 20 year period ... tetracycline-marked teeth confirmed that the feeding trip/suckling cycles of females are reflected as ... number of feeding trips made by an individual's mother during lactation. This analysis showed that ... between 1962 and 1981 the mean number of feeding trips made by female fur seals varied markedly. From ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 441-443 : Автор(ы): Bengtson, J.L.
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Effects of weather and sea-ice on the reproductive performance of the Adélie penguin at Edmonson Point, Ross Sea
males on the second incubation trip. A high number of chicks died during the post-hatching stage and the ... extensive and persistent sea-ice and strong winds with snowfalls in December. First incubation trips by ... breeding success was low with 0.3 chicks crèched per nest with eggs. The mean crèching date was also ... in 2003. It is suggested in this paper that the ability of penguins to cope with severe short-term ... trip. A high number of chicks died during the post-hatching stage and the breeding success was low ... later (F2,260 = 43.04, p < 0.001) in 2003 (Table 2). No signifi cant differences between years were ... -rearing period compared with the 1999 and 2001 breeding seasons, in which sea-ice conditions and trip ... to year, except for crèching date which was later in 2003. Despite the consistency in timing of ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 99–109 : Автор(ы): Olmastroni, S., F. Pezzo, V. Volpi and S. Focardi
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A first step towards modelling the krill–predator dynamics of the Antarctic ecosystem
, together with suggested further areas for investigation. Amongst the key inferences of the study are that ... began in the late 1960s, with catches peaking at over half a million tonnes in the 1981 season, and ... taken between 1973 and 2001 (Miller, 2002). The fishery has been stable for the past nine years with ... the late 1960s, followed by a drop and then stabilisa- tion over more recent years. Mori and ... results and the assumptions on which they are based is discussed, together with suggested further areas ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 217–277 : Автор(ы): Mori, M. and D.S. Butterworth
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The effects of monitoring procedures on Adélie penguins
incubation period resulted in increased foraging trip durations and reduced breeding success. Attachment for ... single or multiple foraging trips post-hatching caused no significant increase in foraging trip durations ... slightly lower return rate (64%) for non-recaptured birds banded for two years compared with the range of ... carrying a band for one or more years, and on one occasion recaptured a bird with a wide open band, the ... hatched chicks dying of starvation. This compares with a mean colony nest failure rate over four years ... Adelie Penguins Table 3: First male and female foraging trip durations during the incubation period ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 155–164 : Автор(ы): Clarke, J. and K. Kerry
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Differentiation of independent populations of Antarctic krill
-populations is expected to correspond with the number of quasi-stationary cyclonic water circulations. At ... ) population of E. superba" (Makarov, 1972). In a later paper (Makarov, Maslennikov, 1975) after the ... waters. Biologiya Morya, N 3, P. 37-43. Marr J.W.S. 1962. The natural history and geography of the ... expected to correspond with the number of quasi-stationary cyclonic water circulations. At present, at ... OF THE ANTARCTIC KRILL In recent years, several countries (Poland, Federal Republic of Germany ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 275-281 : Автор(ы): USSR
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Telemetry monitoring of ecological resources
including paper recorders and data recording using microprocessors with semiconductor memory. Satellite ... with adhesive will be lost during the animals molt and thus have a useful life of a year or less ... 1960s. Monitoring activity has steadily increased since that time with an increase in numbers and ... 3. Church, K.E. (1980). Expanded radio tracking potential in wildlife investigations with the use ... . (1972). Radio-tagging falconiform and strigiform birds. Raptor Research ~(3) : 93-102 12. Siniff ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 495-511 : Автор(ы): Kuechle, V.B.
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