Search results
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Characterisation of skate catches in the Ross Sea region
in the Ross Sea Region, including the data collected in the two “Year of the Skate” fishing seasons in 2008/09 ... suggesting Eaton cf. skates might grow to larger sizes than starry skates. During the “Years of the Skate ... calculated for toothfish. The “Years of the Skate” have been instrumental in collecting further data ... of data in specific years rather than small amounts of data in many years. An updated risk assessment ...
Meeting Document : WG-FSA-10/25 : Author(s): S. Mormede and A. Dunn (New Zealand)
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Determination of a statistically based survey area suitable for hydroacoustic stock assessment of Euphausia superba in the Elephant Island, King George Island, Bransfield Strait area
of data from 1981, 1984 and 1978-1989 permitted resolution of inter-year differences in standing stock ... relatively uniform from year to year. Using only sub-area biomass leads to an ambiguous interpretation ... of the data as to whether high or law standing stock is due to low production (ie. "good" year vs ... . “bad” year) or differential effects of migration. Using the total of both sub-areas the survey area can ...
Meeting Document : SC-CAMLR-VIII/BG/32 : Author(s): Delegation of USA
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Diet and foraging effort of Adélie penguins in relation to pack-ice conditions in the southern Ross Sea
, by colony, seasons and year. Diet differed among colonies only slightly. The fish Pleuragramma antarcticum ... was the most important prey, especially during years or periods within years when little pack ice was present ... predominantly in a year of heavy pack-ice cover; more adult krill were consumed in two years when pack ice ... was sparse. Foraging trip duration differed by colony, season and year and was related directly to distance ...
Meeting Document : WG-EMM-98/15 : Author(s): D.G. Ainley (USA), P.R. Wilson, K.J. Barton (New Zealand), G. Ballard, N. Nur (USA) and B. Karl (New Zealand)
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Demographic studies of Antarctic krill Euphausia superba Dana in the Cooperation and Cosmonaut Seas (Indian sector of the Southern Ocean)
and mortality rates. The duration of the life cycle of E.superba exceeded 5 years in the Cosmonaut Sea ... and 6 years in the Cooperation Sea. Assuming growth for only 180 days per year, growth rates ranged from 0.120 ... -0.133 mm.d-1, during the first year of life, to 0.019-0.022 mm.d-1 during the fifth year. Von ... method ranged from 0.52, during the maturation period, to 1.1-2.41, during the first and last years ...
Meeting Document : WG-Krill-94/16 : Author(s): E.A. Pakhomov (Ukraine)
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Temporal scales of foraging in a marine predator: implications for interpreting the distribution of prey
by short (5 rain) travel durations. In a study lasting 5 years, the distributions of travel durations ... between bouts of feeding changed between years. These changes suggested either that the structure ... and/or the spatial distribution of krill swarms varied between years. The behavior of fur seals suggested ... -scale level. Only in one year of the study (1990/91) were there indications that fur seals had ...
Meeting Document : WG-EMM-95/23 : Author(s): Boyd, I.L.
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Spatio–temporal dynamics of Antarctic krill fishery: identification of fishing hotspots
is presenting consistent FH across years, particularly during those years when the precautionary catch limit ... of radius 25 km, and have a high catch density (>10 ton∙km-2) during years when the catch limit ... is reached. The analysis show that the krill fishing fleet is concurring to know fishing grounds year after ... year, where they obtain high catches, and that the catch density (ton∙km-2) inside the FHs ...
Meeting Document : WG-EMM-16/52 : Author(s): F. Santa Cruz, B. Ernst and J.A. Arata
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Diet variability and reproductive performance of macaroni penguins (Eudyptes chrysolophus) at Bird Island, South Georgia
(Euphausia superba) was the main prey in 17 out of 22 years. Amphipods (Themisto gaudichaudii) were the main ... . and E. frigida) in 2000. There was no clearly dominant prey group in 1999. The five-year average proportion ... energy content of individual meals was often above average in years when the diets contained fewer ... euphausiids, but fledging mass was always below average in these years. Although macaroni penguins are able ...
Meeting Document : WG-EMM-12/17 : Author(s): C.M. Waluda, S.L. Hill, H.J. Peat and P.N. Trathan (United Kingdom)
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AGE AND GROWTH OF SPINY ICEFISH, CHAENODRACO WILSONI REGAN, 1914, OFF JOINVILLE-D'URVILLE ISLANDS (ANTARCTIC PENINSULA)
. Age at sexual maturity was estimated to be about 2 years for females and 2.5 years for males. Compared ... of adult specimens between 1 and 3 years of age, with very few older fish. Author(s): M. La Mesa, A. De ... for males. Age at sexual maturity was estimated to be about 2 years for females and 2.5 years for males ... consisted mainly of adult specimens between 1 and 3 years of age, with very few older fish. ...
Meeting Document : WG-FSA-08/33 : Author(s): M. La Mesa, A. De Felice (Italy), C.D. Jones (USA) and K.-H. Kock (Germany)
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Long term variability in the diet and reproductive performance of penguins at Bird Island, South Georgia
Abstract: Inter-annual variability in diet during crèche (December to February) over 22 years ... present in 89 % of samples and were the main prey (> 50 % by mass) in 10 years of the study. Antarctic ... and were the main prey in 12 years, with Champsocephalus gunnari and Lepidonotothen larseni the most ... Inter-annual variability in diet during crèche (December to February) over 22 years (1989 ...
Meeting Document : WG-EMM-17/P02 : Author(s): C.M. Waluda, S.L. Hill, H.J. Peat and P.N. Trathan
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Population structure of icefish (Champsocephalus gunnari) in the South Georgia area (Antarctic)
in length and older than 6-7 years (10-11 years in the South Georgia area) and considerably lower number ... to assume the common origin of the western and Shag Rock groupings. C.gunnari of two-three years old ... and older than 6-7 years (10-11 years in the South Georgia area) and considerably lower number of large fish ... of the western and Shag Rock groupings. C.gunnari of two-three years old (at the length of 22-23 cm) migrate from ...
Meeting Document : WG-FSA-04/40 : Author(s): Zh.A. Frolkina and I.A. Trunov (Russia)