Search results
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Apparent decrease of Weddell seal numbers in the western Ross Sea
by satellite indicate wider foraging range during winter than 20 years ago. A large-scale seal monitoring ... by satellite indicate wider foraging range during winter than 20 years ago. A large-scale seal monitoring ...
Meeting Document : WG-EMM-14/44 : Author(s): D.G. Ainley, M.A. Larue (USA), I. Stirling (Canada), S. Stammerjohn and D.B. Siniff (USA)
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SUMMER SURVEY OF FUR SEALS AT PRINCE EDWARD ISLAND, SOUTHERN INDIAN OCEAN
gazella and Subantarctic fur seals A. tropicalis were determined at Prince Edward Island during 16–20 ... of 11.4% per year from 2001. With an estimated 810 pups, the Antarctic fur seal is still in the rapid ... rate of natural increase has declined to –0.3% per year over the last seven years, compared to the 9.3 ... % per year between 1987/1988 and 2001/2002, and the population is in the mature phase of population ...
Meeting Document : WG-EMM-10/P15 : Author(s): M.N. Bester, P.G. Ryan and J. Visagie
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Analysis of the by-catch of Channichthys rhinoceratus and Lepidonotothen squamifrons from the fisheries at Heard Island and the McDonald Islands (Division 58.5.2)
of the mackerel icefish fishery than L. squamifrons. Over the 15 years of the fisheries, approximately 20 ... of the mackerel icefish fishery than L. squamifrons. Over the 15 years of the fisheries, approximately 20 ...
Meeting Document : WG-FSA-12/24 : Author(s): G.B. Nowara, D.C. Welsford, S.G. Candy and T.D. Lamb (Australia)
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Summer survey of fur seals at Prince Edward Island, southern Indian Ocean
gazella and Subantarctic fur seals A. tropicalis were determined at Prince Edward Island during 16–20 ... of 11.4% per year from 2001. With an estimated 810 pups, the Antarctic fur seal is still in the rapid ... rate of natural increase has declined to –0.3% per year over the last seven years, compared to the 9.3 ... % per year between 1987/1988 and 2001/2002, and the population is in the mature phase of population ...
Meeting Document : WG-EMM-10/P15 : Author(s): M.N. Bester, P.G. Ryan and J. Visagie
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Disentangling the influence of three major threats on the demography of an albatross community
threats on the demography of seabird communities is vital for evidence-based conservation. Using 20 years ... on the demography of seabird communities is vital for evidence-based conservation. Using 20 years of capture ... by high density of rabbits Oryctolagus cuniculus explained 20.0-75.6% of the temporal variability ... . Habitat degradation caused by high density of rabbits Oryctolagus cuniculus explained 20.0-75.6 ...
Meeting Document : WG-FSA-2019/34 : Author(s): J.B. Cleeland, D. Pardo, B. Raymond, G.N. Tuck, C.R. McMahon, R.A. Phillips, R. Alderman, M.-A. Lea and M.A. Hindell
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ANTARCTIC FUR SEAL PUP PRODUCTION AND POPULATION TRENDS IN THE SOUTH SHETLAND ISLANDS WITH SPECIAL REFERENCE TO SOURCES OF ERROR IN PUP PRODUCTION ESTIMATES
to 30 days after the median date of pupping was estimated for the years 1997-2007 at 4.5% (±0.60). Adult ... to 30 days after the median date of pupping was estimated for the years 1997-2007 at 4.5% (±0.60 ... with previous censuses over a 20yr period (1987, 1992, 1994, and 1996) indicates the rate of increase in fur ... the water (~30d after the median date of pupping [MDP]). Leopard seal predation for the first 75d post MDP ...
Meeting Document : WG-EMM-PSW-08/14 : Author(s): M.E. Goebel (USA), D.E. Torres C. (Chile), A. Miller, J. Santora, D. Costa (USA) and P. Diaz (Chile)
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Exploratory analysis of acoustic data from the Ross Sea
could be compared with longline catches. Each ‘line’ recording was between 20 and 50 min long ... January 2003, and the occurrence of a double bottom echo caused by too high a ping rate from 23–30 January ... with a slope of 20º. The problem of the acoustic deadzone was worsened by the occurrence of side-lobe echoes ... types of pelagic layers were present in most acoustic recordings: a dense shallow layer between 30 ...
Meeting Document : WG-FSA-SAM 03/9 : Author(s): R.L. O’Driscoll and G.J. Macaulay (New Zealand)
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Demography and population trends of the Atlantic yellow-nosed albatross
two study colonies on Gough Island and Tristan da Cunha for 20 years. Annual variation in the number ... study colonies on Gough Island and Tristan da Cunha for 20 years. Annual variation in the number ... populations have trended downward at around 1.2% per year. The number of established breeders on Gough Island ... populations have trended downward at around 1.2% per year. The number of established breeders on Gough Island ...
Meeting Document : WG-FSA-03/37 : Author(s): R. Cuthbert (United Kingdom), P.G. Ryan, J. Cooper (South Africa) and G. Hilton (United Kingdom)
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Marine debris and entanglements at Bird Island and King Edward Point, South Georgia, Signy Island, South Orkneys and Goudier Island, Antarctic Peninsula 2012/13
during summer only; 25 November 2012 to 20 March 2013) recorded a total of 13 items of beached marine ... years of summer surveys at Signy Island, possibly due to sea-ice coverage at the three survey beaches ... during summer only; 25 November 2012 to 20 March 2013) recorded a total of 13 items of beached marine ... years of summer surveys at Signy Island, possibly due to sea-ice coverage at the three survey beaches ...
Meeting Document : SC-CAMLR-XXXII/BG/05 : Author(s): Delegation of the United Kingdom
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Evaluation on the performance of echosounder on a fishing vessel using maximum seabed backscattering
and 2018) collected at a relatively fixed location with bottom depth around 200 m were used to evaluate ... analysis indicated that there was no significant difference among years at both frequencies. Author ... vessel to estimate Antarctic krill biomass. Acoustic data from three surveys (2015, 2016 and 2018 ... indicated that there was no significant difference among years at both frequencies. ...
Meeting Document : SG-ASAM-18/06 : Author(s): X. Wang, X. Yu and X. Zhao