Search results
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Low breeding success of the Adélie penguin at Béchervaise Island in the 1998/99 season
all chicks died of starvation), when smaller meals were delivered and birds foraged further offshore ... all chicks died of starvation), when smaller meals were delivered and birds foraged further offshore ... fewer local trips and both sexes spent longer at sea than in years of higher breeding success. Meal ... fewer local trips and both sexes spent longer at sea than in years of higher breeding success. Meal ... season eventually died from starvation. All Trips Mean SE Trips (hf >48 h ("/.l 31.4 1.3 18 ... . These findings contrast with observations made in 1994/95 (a season in which all chicks died of starvation ... were Stomach samples were analysed according to very young: 76% died by the age of 15 days ... during the guard stage. Most of the chicks died when they were young, the time at whch frequent energy ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 151–167 : Author(s): Irvine, L.G., J.R. Clarke and K.R. Kerry
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Long-term trends in the foraging patterns of female Antarctic fur seals at South Georgia
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 1962 ... trips, with 1979 being the year with the fewest trips made during the entire 20 year period. (In press ... , was analyzed to estimate: 1) birth year of individuals, and 2) the number of feeding trips made ... , and 2) 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 markedly. From ... of feeding trips, with 1979 being the year with the fewest trips made during the entire 20 year period ... . Bengtson (USA) Abstract The number of feeding trips to sea made by female Antarctic fur seals during ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 441-443 : Author(s): 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
incubation trip. A high number of chicks died during the post-hatching stage and the breeding success was low ... . A high number of chicks died during the post-hatching stage and the breeding success was low with 0.3 ... and persistent sea-ice and strong winds with snowfalls in December. First incubation trips by females were ... and strong winds with snowfalls in December. First incubation trips by females were significantly longer than ... trip. A high number of chicks died during the post-hatching stage and the breeding success was low ... , ROSS SEA S. Olmastroni , F. Pezzo, V. Volpi and S. Focardi Dipartimento di Scienze Ambientali ... ‘G. Sarfatti’ Università degli Studi di Siena Via P.A. Mattioli 4, 53100 Siena, Italy Email – olmastroni ... to year, except for crèching date which was later in 2003. Despite the consistency in timing of breed ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 99–109 : Author(s): Olmastroni, S., F. Pezzo, V. Volpi and S. Focardi
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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)
and recorded dis- tance data to allow estimates of densities of seals hauled out to be made with line transect ... changes regionally, seasonally, or over the long term. Dis- tilling these broad generalisations from ... inade- quate to represent the entire pack-ice. From the late 1960s to the early 1980s, Erickson ... , it is strongly recommended that all of these early estimates be treated only as the good-faith guesses ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 49–74 : Author(s): 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 ... superba) fishery between 1972/73 and 1987/88. The annual krill catch rose gradually to a peak of some 500 ... commenced in the early 1960's and initially catches were relatively small (Table 1). The build-up of annual ... 81 82 83 84 85 86 87 88 SPllT-YEAR Figure 2: Reported annual krill catches by country from ... 87 88 SPLIT YEAR Figure 4: Reported annual krill catches by country in Statistical Area 48. 249 ... 81 82 83 84 85 86 87 88 SPLIT YEAR Figure 5: Reported annual krill catches by country ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 229–281 : Author(s): Miller, D.G.M.
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A first step towards modelling the krill–predator dynamics of the Antarctic ecosystem
exploita- tion commenced in the 1960s, and that of Antarctic krill (Euphausia superba) (hereafter called ... ) were harvested legally from 1904 for almost 60 years, fin whales (B. physalus) from 1913 to 1976 ... , and humpback whales (Megaptera novaeangliae) until 1962 (though there were some illegal takes after ... (B. borealis) distributed further to the north were heavily impacted in the 1960s and 1970s. Based ... , together with suggested further areas for investigation. Amongst the key inferences of the study are that ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 217–277 : Author(s): Mori, M. and D.S. Butterworth
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Operational interactions of sperm whales and killer whales with the Patagonian toothfish industrial fishery off southern Chile
le s (in di vi du al s) 0 10 20 30 40 50 60 70 80 90 E ffo rt ( ha ul s ob se ... Month K ill er w ha le s (in di vi du al s) 0 10 20 30 40 50 60 70 80 90 E ffo rt ... 1955 in Chile (González, 1962) Резюме Оценка взаимодействия кашалотов (Physeter macrocephalus ... extends throughout the country, with southern Chile being the area of best yields (Lemaitre et al., 1991 ... Paper Title: Operational interactions of sperm whales and killer whales with the Patagonian ... (Physeter macrocephalus) and killer whales (Orcinus orca) with Patagonian toothfish (Dissostichus ... eleginoides) fishery operations were assessed in southern Chile during surveys with observers on board ... = 3). The mean rate of depredation was 3% (±2% CI 95%; n = 180 sets) and ranged between 0 and 100 ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 127–140 : Author(s): Hucke-Gaete, R., C.A. Moreno and J. Arata
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The effects of monitoring procedures on Adélie penguins
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 ... devices during the 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 ... . Incidence of nest failure is indicated. * Nest failure due to late return of PTT carrier ** Chicks died ... foraging trip durations and reduced breeding success. Attachment for single or multiple foraging trips ... post-hatching caused no significant increase in foraging trip durations. No reduction in fledging ... , 1991). The overall outcome tends to be a n increase in foraging trip durations (Wilson et al., 1989 ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 155–164 : Author(s): Clarke, J. and K. Kerry
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Differentiation of independent populations of Antarctic krill
: Several countries have recently shown an interest in commercial krill fishing. An understanding of krill ... Several countries have recently shown an interest in commercial krill fishing. An understanding ... - DIFFERENTIATION OF INDEPENDENT POPULATIONS OF THE ANTARCTIC KRILL In recent years, several countries (Poland ... ) population of E. superba" (Makarov, 1972). In a later paper (Makarov, Maslennikov, 1975) after ... OF INDEPENDENT POPDLATIONS OF ANTARCTIC KRILL D.S.S.R. Abstract Several countries have recently shown ... of the necessity of setting krill catch quotas for each fishing country in the near future. These problems can ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 275-281 : Author(s): USSR
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Demographic characteristics of the Adélie penguin population on Béchervaise Island after 12 years of study
in eastern Antarctica after 12 years of monitoring under the CCAMLR Ecosystem Monitoring Program (CEMP ... after 12 years of study Abstract / Description: Demographic parameters (age-specific survival rates ... in the Ross Sea studied during the 1960s and 1970s (Ainley et al., 1983), and in relation to other CEMP ... Demographic characteristics of the Adélie penguin population on Béchervaise Island after 12 years ... rv iv or sh ip b y br ee di ng s ea so n fo r a ll m al es p oo le d. 19 91 ... b y br ee di ng s ea so n fo r a ll al l f em al es p oo le d. 19 91 /9 2 19 92 ... for the Béchervaise Island Adélie penguin colony in eastern Antarctica after 12 years of monitoring under the CCAMLR ... AFTER 12 YEARS OF STUDY J. Clarke , L.M. Emmerson, A. Townsend and K.R. Kerry Australian Antarctic ...
Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 53–74 : Author(s): Clarke, J., L.M. Emmerson, A. Townsend and K.R. Kerry