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Demographic characteristics of the Adélie penguin population on Béchervaise Island after 12 years of study
/decline rates of the Adélie penguin population at Béchervaise Island were found to be more sensitive to ... Paper Title: Demographic characteristics of the Adélie penguin population on Béchervaise Island ... after 12 years of study Abstract / Description: Demographic parameters (age-specific survival rates ... eastern Antarctica after 12 years of monitoring under the CCAMLR Ecosystem Monitoring Program (CEMP). A ... different stages of the breeding season: total penguins present at the end of the arrival period (CEMP ... on the 200 marked nests; and (iii) nest checks of all 18 sub-colonies on the island at the times of ... , situated at Verner Island, 5 km to the east of Béchervaise Island, was also used to detect tagged birds ... were at least 4 years of age when tagged. However, age-specifi c fecundity for younger birds was ...
Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 53–74 : Автор(ы): Clarke, J., L.M. Emmerson, A. Townsend and K.R. Kerry
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Population genetic structure of Patagonian toothfish in the West Indian Ocean sector of the Southern Ocean
Paper Title: Population genetic structure of Patagonian toothfish in the West Indian Ocean sector ... of the Southern Ocean Abstract / Description: Molecular markers were used to investigate the stock ... structure of Patagonian toothfish (Dissostichus eleginoides) in the West Indian Ocean sector of the Southern ... Ocean. Four collections of D. eleginoides from Kerguelen (n = 1), Crozet (n = 1) and Prince Edward and ... on D. eleginoides population structure globally suggests the presence of at least three discrete D ... indicated restricted gene fl ow, with fi sh at each of the fi shing locations comprising independent units ... a lack of heterozygotes observed at cmrDe2 (three instances) and cmrDe9 (two instances). There was ... frequencies at BCL and ND2 regions of mtDNA, sample sizes (n), number of haplotypes (A) and gene diversity (h ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 21–32 : Автор(ы): Appleyard, S.A., R. Williams and R.D. Ward
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Use of indices of predator status and performance in CCAMLR fishery management
Paper Title: Use of indices of predator status and performance in CCAMLR fishery management ... Abstract / Description: This paper investigates how data on, or related to, reproductive performance of ... seabird and seal predators,collected as part of the CCAMLR Ecosystem Monitoring Program (CEMP) could be ... used in the management, by CCAMLR, of commercial fisheries. It reviews reasons why it is important for ... 11, is where the "burden of proof" rests. lt is apparently implicit at present that detrimental ... of prey (at present krill) abundance and availability (to the predators}. (iii) To use predator ... ) will rarely be available even at 90%, let alone 95% levels of statistical significance (Croxall et al ... that if predator populations are in trouble, any level of harvesting, if conducted at critical times ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 353–365 : Автор(ы): Croxall, J.P.
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A compilation of parameters for ecosystem dynamics models of the Scotia Sea – Antarctic Peninsula region
Paper Title: A compilation of parameters for ecosystem dynamics models of the Scotia Sea ... – Antarctic Peninsula region Abstract / Description: Expansion of the krill fishery in the Scotia Sea ... assessment of methods for subdividing the precautionary catch limit amongst smaller spatial units. This paper ... uncertainty, which must be taken into account when it is used. The sources, assumptions and calculations at ... used. The sources, assumptions and calculations at every stage of the compilation process are ... models must be spatially resolved at least to the scale of SSMUs and must represent krill and predator ... recruit to the adult popula- tion at the age of fi rst breeding. The models are similar in their ... particles released in area m at the beginning of the advection period and ,m nθ is the number of these ...
Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 1–25 : Автор(ы): Hill, S.L., K. Reid, S.E. Thorpe, J. Hinke and G.M. Watters
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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)
Paper Title: A review of data on abundance, trends in abundance, habitat use and diet of ice ... / Description: The development of models of marine ecosystems in the Southern Ocean is becoming increasingly ... important as a means of understanding and managing impacts such as exploitation and climate change ... habitats of the Southern Ocean (i.e. crabeater seal, Lobodon carcinophaga; Ross seal, Ommatophoca rossii ... the late 1940s and early 1950s (Table 1). Laws (1953) estimated the abundances of the four species ... position in the pack-ice at five locations around Antarctica in February (at one of these sites counts of ... ). Regres- sion analysis indicated a unimodal distribution of counts that peaked around midday at all sites ... . A predictive model was then developed to adjust counts at any time of day to those expected at the ...
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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An assessment of the impact of krill fishery on penguins in the South Shetlands
Paper Title: An assessment of the impact of krill fishery on penguins in the South Shetlands ... Abstract / Description: An assessment of the competition between the Japanese krill (Euphausia superba ... the northern shelf of either Livingston or Elephant Island. In contrast, food consumption by penguins ... is estimated to be high to the north of King George, Nelson and Robert Islands (9 746 tonnes/10-day ... open water may be closely linked to the formation of large colonies of chinstraps at Low, Clarence ... at Seal Island, near Elephant Island, empirical measurements were taken of the foraging ranges of ... chinstrap penguins. These show that chinstraps performed most of their foraging dives at a distance of ... behavior of chinstrap penguins at Seal Island. Antarctic Science, 5 (1): 9-15. CCAMLR. 1993. S ta t i s ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 107–128 : Автор(ы): Ichii, T., M. Naganobu and T. Ogishima
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Distribution and size of Antarctic krill (Euphausia superba Dana) in Polish commercial catches taken in the Atlantic sector of the Southern Ocean from 1997 to 1999
Paper Title: Distribution and size of Antarctic krill (Euphausia superba Dana) in Polish ... commercial catches taken in the Atlantic sector of the Southern Ocean from 1997 to 1999 Abstract ... / Description: The distribution and internal structure of commercial krill concentrations were investigated in ... the areas of the South Shetland, Elephant, South Georgia and South Orkney Islands in the spring and ... aggregations at different times of day and night in the South Georgia area. Shevtsov and Makarov (1969) have ... used in order to determine the dura- tion of each haul. The beginning of trawling was the time at ... which shooting was completed and the net began to fi sh. The end of trawling was the time at which ... Distribution and size of krill in Polish commercial catches, 1997–1999 to 249 m) than at night (up to 149 m ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 83–105 : Автор(ы): Jackowski, E
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Experimental evaluation of the effectiveness of weighting regimes in reducing seabird by-catch in the longline toothfish fishery around South Georgia
of experiments was carried out in February 1999 at South Georgia (Subarea 48.3) to examine the ... used. Therefore to minimise seabird by-catch, line-weighting regimes of at least 8.5 kg at 40 m ... Paper Title: Experimental evaluation of the effectiveness of weighting regimes in reducing ... effects of different weighting regimes on the incidental mortality of birds caught on longlines fishing ... Abstract A series of experiments was carried out in February 1999 at South Georgia (Subarea 48.3) to ... when 12.75 kg was used. Therefore to minimise seabird by-catch, line-weighting regimes of at least 8.5 ... Conservation Measure 29/XVI (CCAMLR, 1999). This measure requires the setting of longlines only at night ... required by the conservation measure (6 kg at 20 m intervals) was derived from a study of bird strikes in ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 119–131 : Автор(ы): Agnew, D.J., A.D. Black, J.P. Croxall and G.B. Parkes
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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 ... present, at least six stable cyclonic water circulations can be found and at least two or three of them ... Paper Title: Differentiation of independent populations of Antarctic krill Abstract / Description ... : Several countries have recently shown an interest in commercial krill fishing. An understanding of krill ... expected to correspond with the number of quasi-stationary cyclonic water circulations. At present, at ... least six stable cyclonic water circulations can be found and at least two or three of them may be ... recent data it thus appears that there are at least six cyclonic circulations in the Southern Ocean of ... absence of larvae at great depths in winter was established, the dominant role of horizontal circulation ...
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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Is current management of the Antarctic krill fishery in the Atlantic sector of the Southern Ocean precautionary?
excessive concentration of catch at the subarea scale. Finer-scale management might be necessary to manage ... Paper Title: Is current management of the Antarctic krill fishery in the Atlantic sector of the ... Southern Ocean precautionary? Abstract / Description: This paper explains the management of the Antarctic ... krill (Euphausia superba) fishery in the Atlantic sector of the Southern Ocean, and current knowledge ... of the regional biomass in recent years. This suggests that fishing at the trigger level would be ... limits help prevent excessive concentration of catch at the subarea scale. Finer-scale manage- ment ... probability of the spawning stock biomass falling to 20% of the reference level at any time should be no ... in deeper waters and have been recorded at the seabed to depths of 3 500 m (Clarke and Tyler, 2008 ...
Science Journal Paper : CCAMLR Science, Volume 23 (CCAMLR Science, Volume 23) : 31–51 : Автор(ы): Hill, S.L., A. Atkinson, C. Darby, S. Fielding, B.A. Krafft, O.R. Godø, G. Skaret, P.N. Trathan and J.L. Watkins
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