Resultados de la búsqueda
-
Low breeding success of the Adélie penguin at Béchervaise Island in the 1998/99 season
fewer local trips and both sexes spent longer at sea than in years of higher breeding success. Meal ... Paper Title: Low breeding success of the Adélie penguin at Béchervaise Island in the 1998/99 ... inadequate rate of food supply. In most previous seasons adults have foraged both at the continental shelf ... reduced feeding frequency. These findings contrast with observations made in 1994/95 (a season in which ... trips and both sexes spent longer at sea than in years of higher breeding success. Meal masses brought ... 1998/99 season did not differ from other years except for the period from 25 February to 1 March in ... durations in 1998/99 were greater than all years Irvine et a1 Table 3: Mean foraging trip durations ... significantly greater in 1998/99 than in two of the years with higher breeding success (p < 0.05), and the ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 151–167 : Autor(es): Irvine, L.G., J.R. Clarke and K.R. Kerry
-
Biological characteristics of Antarctic fish stocks in the southern Scotia Arc region
, despite substantial catches in the first four years of the fishery and ample opportunity to sample these ... catches. The only scientific surveys of these stocks during these years were conducted by Germany in 1985 ... evidence of illegal fishing since the closure of the region some 10 years ago. Differences in length-weight ... takes one year or more, whereas in others gonad maturation was completed within one season. Length at ... 1998, despite substantial catches in the first four years of the fishery and ample opportunity to ... taken in substantial numbers in single years. The fishery was extended to the island shelves of the ... for some years in the late 1980s. Since the early 1990s, the fishery was almost exclusively a ... ) in 30 fresh oocytes per individual was measured under a dissecting microscope at a magnification of ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 1–41 : Autor(es): Kock, K.-H., C.D. Jones and S. Wilhelms
-
Comparative feeding ecology of Patagonian toothfish (Dissostichus eleginoides) in the southwestern Atlantic
Paper Title: Comparative feeding ecology of Patagonian toothfish (Dissostichus eleginoides) in ... eleginoides) was investigated in two offshore regions in the southwestern Atlantic: on the Argentinian ... continental shelf/slope between 46°-55°S and 60°-64°W, and around South Georgia between 53°-55°30' and 3 ... Argentinian continental shelf/slope, the length of D. eleginoides ranged from 30 to 95 cm total length (TL ... . Its geographic distribution ranges from 30"s in the Pacific, to the north of Chile, to Cape Horn ... main line of 20 000 m, with branch lines each with 90 hooks (model 'Ancora', 30 mm gap) spaced at 1 m ... krill, present only in zone SG1, this was 20%F, while cephalopods ranged from 1 to 15%F. Another prey ... of cephalopods (40%F) and Natantia crustaceans (20%), a prey item which is absent in the remaining ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 105–124 : Autor(es): García de la Rosa, S.B., F. Sánchez and D. Figueroa
-
Biological parameters for icefish (Chionobathyscus dewitti) in the Ross Sea, Antarctica
about 370–400 mm TL and 6–8 years of age. Counts of growth zones in sectioned otoliths were used to ... Paper Title: Biological parameters for icefish (Chionobathyscus dewitti) in the Ross Sea ... Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea (CCAMLR Subareas 88.1 and 88.2). Biological data ... Chionobathyscus dewitti, and showed no significant difference in sex ratio. Meristic, diet and age data were ... years of age. Counts of growth zones in sectioned otoliths were used to determine ages and von ... ages ranging between 5 and 11 years. The greater age range observed in the current study is likely to ... BIOLOGICAL PARAMETERS FOR ICEFISH (CHIONOBATHYSCUS DEWITTI) IN THE ROSS SEA, ANTARCTICA C.P. Sutton ... ) in the Ross Sea (CCAMLR Subareas 88.1 and 88.2). Biological data from 303 specimens were collected ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 139–165 : Autor(es): Sutton, C.P., M.J. Manning, D.W. Stevens and P.M. Marriott
-
Additional data on anti-Brucella antibodies in Arctocephalus gazella from Cape Shirreff, Livingston Island, Antarctica
Paper Title: Additional data on anti-Brucella antibodies in Arctocephalus gazella from Cape ... antibodies in the Southern Hemisphere was recorded in two pinniped species from Antarctica: Antarctic fur ... first records, this paper describes additional data on Brucella antibodies in A. gazella obtained at ... detected in one sample with the RB test, and in five of the 86 samples (5.8%) using the c-ELISA test. These ... antibodies in A.rcfoceplzalus gazella. * - dead animal; RB - Rose Bengal test; COMPELISAB - Competitive ... abortion and infection in bottlei~ose dolphins (Tzrrsiops tnrncntus). J. Zoo Wild. Med., 30 (1): 100-110 ... ON ANTI-BRUCELLA ANTIBODIES IN ARCTOCEPHALLIS GAZELLA FROM CAPE SHIRREFF, LIVINGSTON ISLAND ... Medicina Preventiva Animal Facultad de Ciencias Veterinarias y Pecuarias Universidad de Chile Casilla ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 147–154 : Autor(es): Blank, O., P. Retamal, P. Abalos and D. Torres
-
Krill distribution in the western Atlantic sector of the Southern Ocean during 1983/84, 1984/85 and 1987/88 based on the results of Soviet mesoscale surveys conducted using an Isaacs-Kidd midwater trawl
Paper Title: Krill distribution in the western Atlantic sector of the Southern Ocean during 1983 ... -Kidd midwater trawl Abstract / Description: In this paper we consider the results of three mesoscale ... Island. Surveys including from 158 to 202 stations were carried out by Soviet research vessels in the ... summer-autumn periods of 1983/84 and 1987/88 and in the spring-summer of 1984/85 using a grid of stations ... " 50" 45" 40" 35" 30" Figure 4: Krill diskibution (g/ l 000 m3) in strata 0 to 100 m, 20 January to ... needed to obtain such material. Previous surveys carried out annually over nearly 20 years covered only ... distribution (g / l 000 m3) in strata 0 to 100 m, 27 January to 16 March 1984. 60" 55" 50" 45" 40" 35" 30 ... currents (relative to the 1 000 dbar), 20 January to 9 March 1988. 60" 55" 50" 45" 40" 35" 30" Figure 7 ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 59–70 : Autor(es): Sushin, V.A. and K.E. Shulgovsky
-
Estimation of krill (Euphausia superba) mortality and production rate in the Antarctic Peninsula region
Paper Title: Estimation of krill (Euphausia superba) mortality and production rate in the ... data of an identical survey with RV Polarstern in 1987/88. Seasonal variation between summer and winter ... ratio of 0.88 to 0.94 for different years. The exchange rate of water masses and krill biomass within ... surveys from different years to detect the degree of interannual variation in krill abundance. The ... spawning in preceding years. From the 1987/88 age group composition a total mortality of Z = 0.96 (r ... frequencies from whale stomachs and found high abundances of 20 to 30 mm juvenile krill. These size groups ... longevity in years) Recently published results on number of krill age groups range from six groups ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 159–176 : Autor(es): Siegel, V.
-
A fine-scale model of the overlap between penguin foraging demands and the krill fishery in the South Shetland Islands and Antarctic Peninsula
fishery in the South Shetland Islands and Antarctic Peninsula Abstract / Description: CCAMLR has been ... using the total catch of krill taken within 100 km of penguin colonies in their breeding season ... distribution of the krill fishery in Subarea 48.1 (South Shetland Islands). As this index has proven unsuitable ... of fishing in Subarea 48.1 over the period 1988 to 1991 was highly consistent between years, and ... analysis, mean foraging distance for chinstrap penguins was increased by 50% (from 20 to 30 km), although ... Macaroni 190 285 123 19 26 3 Foraging Angle -30% (percentage change in parenthesis ... extent than in subsequent years. Thus, whereas previously 1989 would have been considered an anomalous ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 99–110 : Autor(es): Agnew, D.J. and G. Phegan
-
Fatty acid and stable isotope analyses to infer diet of Antarctic toothfish caught in the southern Ross Sea
in the southern Ross Sea Abstract / Description: To infer important prey resources for Antarctic ... toothfish (Dissostichus mawsoni) in the southern Ross Sea, their lipid composition was determined and ... compared to lipid profiles of fish and invertebrate species taken as by-catch in the fishery or collected ... toothfish in February 2012. Results of fatty acid (FA) and stable isotope analyses from this study provide ... ) and 120–135 cm (D). Values are mean ± SD. 70 60 50 40 30 20 10 0 % c om po si tio n ... OCT Octopodidae Octopus 10 0 20 0 30 SZT Pogonophryne scotti Plunderfish 25 0 0 3 28 PRA Pasiphaea ... . 0 ± 0. 7 C 18 :1 n9 c 20 .2 19 .5 ± 6 .4 21 .7 ± 0 .3 14 .1 30 .1 ± 2 .8 ... Science, Vol. 20 (2013): 21–36 21 FATTY ACID AND STABLE ISOTOPE ANALYSES TO INFER DIET OF ANTARCTIC ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 21–36 : Autor(es): Jo, H.-S., I. Yeon, C. Lim, S.M. Hanchet, D.-W. Lee and C.-K. Kang
-
Differences in distribution and population structure of krill (Euphausia superba) between penguin and fur seal foraging areas near Seal Island
at a deeper range from 50 to 100 m in the day while at a shallower range from 20 to 50 m at night. In ... Paper Title: Differences in distribution and population structure of krill (Euphausia superba ... in inshore regions where krill frequently occurred but higher density areas of krill (~250 g/m 2 ... ) were rather limited. In contrast, fur seal foraging areas were found in offshore regions where krill ... , tending to be at a deeper range from 50 to 100 m in the day while at a shallower range from 20 to 50 m at ... the slope front. Subsurface current patterns (30 to 35 m depth) in the foraging areas were assessed ... (50 to 100 m) in the daytime, while at a shallower layer (20 to 50 m) at night (Figure 4). In the ... behaviour in relation to vertical distribution of kriH. 1. Animal Ecol., 54: 1-8. ICHII, T., H. ISHII and ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 273–285 : Autor(es): Ichii, T., H. Ishii, J.L. Bengtson, P. Boveng, J.K. Jansen and M. Naganobu