Search results
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Assessing the power to detect systematic change in Adélie penguin foraging trip duration
Paper Title: Assessing the power to detect systematic change in Adélie penguin foraging trip ... duration Abstract / Description: Models of variability in Adélie penguin foraging trip durations were ... variation was known to occur. Variability among trips and penguins was greater in the crèche stage ... or trips sampled diminished rapidly when sample sizes were greater than 30 penguins and three trips per ... and post- impact year means, then post prey y− is normally dis- tributed with mean δ and variance ... ASSESSING THE POWER TO DETECT SYSTEMATIC CHANGE IN ADÉLIE PENGUIN FORAGING TRIP DURATION C. Southwell ... trip durations were constructed and fitted to data collected at Béchervaise Island over a 12-year ... period when only natural variation was known to occur. Variability among trips and penguins was greater ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 201–215 : Author(s): Southwell, C., J. Clarke and L.M. Emmerson
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Significant intra-annual variability in krill distribution and abundance at South Georgia revealed by multiple acoustic surveys during 2000/01
season: in October 2000 (early-season); during late December/early January 2000/01 (mid-season ... Survey since 1996 (and on a more ad hoc basis since the early 1980s). We hoped that conducting several ... from more restricted once-per-season ‘snap-shot’ cruises in a broader context. The early- and late ... South Georgia. Krill density in the western box in the early-season survey was very low (3.5 ... -frequency dis- tributions to calculate krill target strength. CCAMLR Science, 8: 155–163. Reid, K., K.E ... around South Georgia in the 2000/01 season: in October 2000 (early-season); during late December/early ... regularly maintained by the British Antarctic Survey since 1996 (and on a more ad hoc basis since the early ... in a broader context. The early- and late-season surveys were associated with logistic support voyages ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 71–82 : Author(s): Brierley, A.S., C. Goss, S.A. Grant, J.L. Watkins, K. Reid, M. Belchier, I. Everson, M.J. Jessop, V. Afanasyev and J. Robst
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Hook selectivity in the longline fishery of Dissostichus eleginoides (Nototheniidae) off the Chilean coast
the coast of Valdivia, South East Pacific, are also taken into consideration. The data show that circle ... in longlines. Original data obtained during 1991 off the coast of Valdivia, South East Pacific, are also taken ... in longlines. Original data obtained during 1991 off the coast of Valdivia, South East Pacific, are also taken ... for the Patagonian toothfish (Dissostichus eleginoides, Smith, 1898) in Chile started as early as 1955, the year ... ling (Genypterus blacodes) as the target species (Gonzalez, 1962). In the late sixties, Pavez et al ... , the distribution area of this species includes the South East Pacific Ocean, covers the continental slope ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 107–119 : Author(s): Moreno, C.A.
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Sexing of adult Adélie penguins by discriminant analysis of morphometric measurements
shift). It was found that the combination of flipper breadth, bill depth and length of the middle toe ... ). It was found that the combination of flipper breadth, bill depth and length of the middle toe gave the most ... incubation shift). It was found that the combination of flipper breadth, bill depth and length of the middle ... ), flipper breadth at the widest point near the cubito-carpal joint (FB), length of the middle toe including ... breadth) and LM (length of the middle toe). These three variables are un correlated and all have higher ... that the best measurements for sex identification are flipper breadth (FB) and length of middle toe (LM ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 543–549 : Author(s): Scolaro, J.A., Z.B. Stanganelli, H. Gallelli and D.F. Vergani
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Diet of the Antarctic toothfish (Dissostichus mawsoni) from the Ross Sea, Antarctica (Subarea 88.1)
a more southern dis- tribution, typically in higher latitudes south of 65ºS, is in Subarea 88.1 ... ., 2002), particularly from southwest Atlantic waters (Permitin and Tarverdiyeva, 1972; Tar- verdiyeva ... , 1972; Zhivov and Krivoruchko, 1990; McKenna, 1991; García de la Rosa et al., 1997; Pilling et al ... early-season exploratory effort well to the south onto shallower areas within the Ross Sea ...
Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 113–123 : Author(s): Fenaughty, J.M., D.W. Stevens and S.M. Hanchet
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Krill (Euphausia superba) distribution in relation to water movement and phytoplankton distribution off the northern South Shetland Islands
to early February 1991. This increased krill density in early February 1991 (157 g/m 2) was 54% lower than ... December 1990 to early February 1991. This increased krill density in early February 1991 (157 g/m2) was 54 ... times over a period of 40 days from late December 1990 to early February 1991. This increased krin ... density in early February 1991 (157 g/m2) was 54% lower than that observed in late January 1988 ... after extraction with 90% acetone (Strickland and Parsons, 1972). 2.2 Hydroacoustic Studies ... and King George Island, and was trapped by erratic oceanic eddies to the east of Elephant Island ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 123–140 : Author(s): Ichii, T., H. Ishii and M. Naganobu
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Effect of line sink rate on albatross mortality in the Patagonian toothfish longline fishery
di6metro respectivamente. Figura 2: Configuraci6n de 10s palangres del In Sling 66 (sistema espafiol ... -and-hook bearing 11.5 mm mother line with each end attached to 100 kg anchors, which were used to sink ... of the snoods on the mother line from the anchors. The anchors were attached to 18 mm ropes which rose from ... the mother line. Snood lines were 3 mm in diameter and 50 cm in length. Line Setting and Hauling ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 133–150 : Author(s): Robertson, G.G
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Line weights of constant mass (and sink rates) for Spanish system Patagonian toothfish longline vessels
operations the netting bags abrade on the seabed causing rocks to be lost and the weights to become ... causing rocks to be lost and the weights to become progressively lighter, requiring ongoing repair ... School of Aquatic and Fishery Sciences University of Washington Box 355020 Seattle, WA 98195, USA ... to be lost and the weights to become progressively lighter, requiring ongoing repair. This problem can ... of gear lost in benthic habitats. This paper presents the results of an experiment designed to determine ... fishing. The Tierra del Fuego is a 53.6 m Japanese-built (1972) tuna vessel con- verted to the Spanish ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 93–106 : Author(s): Robertson, G., C.A. Moreno, E. Gutiérrez, S.G. Candy, E.F. Melvin and J.P. Seco Pon
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A balanced model of the food web of the Ross Sea, Antarctica
, starvation); (iv) ‘messy eat- ing’ i.e. parts of animals that died due to predation but were not consumed ... that primary production in the water column in the Ross Sea is bimodal (DiTullio et al., 2000; Smith et al ... m depth contour and by the 69°S line of latitude; to the south by the per- manent ice shelf; to the east ... somewhat of a compromise. Many of the lower and middle TL biota are grouped, whereas the upper preda ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 1–31 : Author(s): Pinkerton, M.H., J.M. Bradford-Grieve and S.M. Hanchet
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Seabird interactions with longlining operations for Dissostichus eleginoides around South Georgia, April to May 1994
and resourcefulness during and after the fire on board. We also honour the memories of those who died: Capitan ... could save the lives of 30 300 albatrosses and enable fishermen to save $4.9 million in bait lost ... was lost during setting. Observations were made during both setting and hauling. Information was recorded ... on a single line was 34, giving a maximum rate of 3.12 birds/l 000 hooks laid. Some baits were lost during ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 111–121 : Author(s): Ashford, J.R., J.P. Croxall, P.S. Rubilar and C.A. Moreno