Search results
-
Ageing two myctophid fishes using otolith from king and macaroni penguins in the Marion Island and its implication to feeding preference of penguins on those myctophids
are 1.0 to 5.5 years and 2.0 to 5.0 years from King penguins and Macaroni penguin, respectively. The age ... structures of P. bolini are 0.5 to 4.0 years and 1.5 to 4.0 years from King penguins and Macaroni penguin ... readers through repeat reading runs 1 to 3. The age structures of E. carlsbergi are 1.0 to 5.5 years ... and 2.0 to 5.0 years from King penguins and Macaroni penguin, respectively. The age structures ...
Meeting Document : WG-FSA-18/74 : Author(s): M. Duan, G.P. Zhu, A. Makhado and L. Wei
-
Are penguins and seals in competition for Antarctic krill at South Georgia?
they are, respectively, the main mammal and bird consumers of Antarctic krill (Euphausia superba). In recent years ... 1989 and 2000. Foraging ranges of the two species showed considerable overlap in both years ... species was very similar, but over the last 12 years the prevalence of krill in their diets has diverged ... of Antarctic fur seals will be enhanced as their population continues to increase, particularly in years ...
Meeting Document : WG-EMM-02/22 : Author(s): K.E. Barlow, I.L. Boyd, J.P. Croxall, K. Reid, U.J. Staniland and A.S. Brierley (United Kingdom)
-
Flexible foraging strategies of gentoo penguins help buffer the impacts of inter-annual changes in prey availability
Shetland Islands, Antarctica, over five years. Antarctic krill Euphausia superba was the primary diet item ... , and fish the secondary, though the importance of these items varied among years. Diving behavior also ... varied over time; different dive depth-distributions were observed in each year. Nonetheless, chick ... with differences in prey availability by altering their foraging strategy among years. We suggest ...
Meeting Document : WG-EMM-08/50 : Author(s): A.K. Miller and W.Z. Trivelpiece (USA)
-
Diet composition and observations on reproduction of Champsocephalus gunnari in Subarea 48.3 in March/April 1996, Dr Eduardo Holmberg survey
items, known as an important alternative food in years of krill scarcity, were ingested only ... higher than those reported for the 1991 and 1994 years of krill shortage. The analysis of the ovarian ... in the region in levels equivalent to the historical years of high abundance. Author(s): Marschoff, E., Barrera ... as an important alternative food in years of krill scarcity, were ingested only occasionally (Themisto ...
Meeting Document : WG-FSA-96/28 Rev. 1 : Author(s): Marschoff, E., Barrera-Oro, E., Casaux, R.
-
Krill population dynamics at South Georgia 1991–1997, based on data from predators and nets
from the same area over the summers of 1991-1997. In comparing the 5 years with both predator and net ... late summer (March). From the 7-year predator time-series, within-year variation was greatest in 1991 ... and 1994, both years of low krill biomass at South Georgia. In both of these years large krill dominated ... in the length-frequency distribution, we suggest that year's of high mean krill length reflect failure ...
Meeting Document : WS-AREA 48-98/15 : Author(s): K. Reid, J. Watkins, J. Croxall and E. Murphy (UK)
-
Abundance and trends in the breeding population of Adélie penguins (Pygoscelis adeliae) in the western Ross Sea
). The aggregated colonies of Cape Bird and Cape Crozier had a negative per capita growth rate of-1.8% for the years ... , 1981-2000 followed by a positive per capita growth rate of 5.5% for the years, 2001-2010. In contrast ... , a single declining trend line best represented the number of breeding pairs at Cape Royds for the years ... dependence in the number of pairs returning to the colony each year. In recent years a number of the Adélie ...
Meeting Document : WG-EMM-13/30 : Author(s): P. O’B. Lyver, M. Barron, K.J. Barton, S. Gordon (New Zealand), D. Ainley, A. Pollard (USA), P.R. Wilson and M.H. Pinkerton (New Zealand)
-
Population identity, site-fidelity, movement ranges and preliminary estimates of abundance of southern right whales in the Antarctic Indian sector inferred from genetic markers
to the same location in the Antarctic Indian sector in subsequent years. The average longitudinal dispersal ... ’ and the ‘recapture’ ranged from 3-13 years with an average at 7.3 years. Preliminary application of a ‘mark-recapture ... sector and similar period. However differences were observed in some years, which suggest that some ... that individual whales tended to return to the same location in the Antarctic Indian sector in subsequent years ...
Meeting Document : WG-EMM-18/18 : Author(s): L.A Pastene, M. Goto, P. Acuña, M. Taguchi, T. Hakamada and K. Matsuoka
-
Interannual variations of water thermochaline structure on South Georgia Island, South Orkney Islands and Shetland Islands shelves
in the area of South Orkney Isls and Shetland Isls in January-February since 1970. Three types of years have ... of intermediate cold layer. In some years of this type (1 97 1, 1972, 1978, 1982) the layer had positive ... temperature, while in other years (1980, 1981) the layer temperature was negative. The second year type (1979 ... between the same. Two year types were revealed in the area of South Orkney Isls. Availability of a warmed ...
Meeting Document : WG-EMM-00/34 : Author(s): P. Chernyshkov, V. Shnar, O. Berezhinsky and I. Polischuk (Russia)
-
Trends in entanglement of Antarctic fur seals (Arctocephalus gazella) in man-made debris at South Georgia
of any material unavoidably jettisoned which could form collars to entangle seals. Five subsequent years ... been halved in recent years. However, the South Georgia fur seal population has approximately doubled ... in the same period, so that the overall total of animals entangled may even have increased. Nevertheless ... bands and the fact that all such bands washed ashore over the last 2 years have been cut, does suggest ...
Meeting Document : SC-CAMLR-XV/BG/03 : Author(s): Delegation of the United Kingdom
-
VME detection thresholds: preliminary results of a study on the case of the sea pens (Pennatulacea) of the CCAMLR sector 58.4.4b
Group 2018. However, despite the important level of the catches, no VME detection threshold triggering ... Group 2018. However, despite the important level of the catches, no VME detection threshold triggering ...
Meeting Document : WG-EMM-2019/52 : Author(s): A. Martin and M. Eléaume