Résultats de la recherche
-
Characteristics of seasonal variation in diurnal vertical migration and aggregation of Antarctic krill (Euphausia superba) in the Scotia Sea, using the Japanese fishery data
Abstract: We examined seasonal variation in CPUE (catch per volume of trawled water) and diurnal ... vertical migration of Antarctic krill (Euphausia superba) associated with the brightness categories of the ... day based upon the angles between the center of the sun and the celestial horizon on the Scotia Sea ... twilight and shallowest around at evening twilight. The range of trawling depth was narrower in the certain ...
Meeting Document : WG-EMM-04/44 : Auteur(s): K. Taki, T. Hayashi and M. Naganobu (Japan)
-
CPUEs, body length and greenness of Antarctic krill during 1987/88 season in the fishing ground north of Livingston Island
Paper Title: CPUEs, body length and greenness of Antarctic krill during 1987/88 season in the ... fishing ground north of Livingston Island Abstract / Description: In order to identify whether or not ... there was a marked change in two kinds of CPUEs, body length and greenness of krill during the fishing ... season, these parameters were examined for each 10-day period of the Japanese krill fishery in the ... Figure 2a: Trawling positions of Japanese trawlers in the first and middle 10 days of January in the ... _______ 6,O ______ 5,5,--______ 5--,0 58 5 1 1 60 62 64 THE MIDDLE TEN DAYS OF FEB. '88 ... trawlers in the middle and last 10 days of February in the 1987/88 season. 330 58S~6~5_W ... ---------' 58 S I. THE MIDDLE TEN DAYS OF ~_~R. '88 60 - 60 .... , .... r::."""='='" .-1.' 62 ~ 62 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 323–338 : Auteur(s): Endo, Y. and T. Ichii
-
Preliminary results of RV Dmitriy Stefanov researches in the Antarctic area of the Atlantic Ocean in April 1992
polygon of 30 x 30 miles in the fishing area northwestward of Coronation Island in 18-22 April,1992. The ... krill biomass was estimated in the beginning and at the end of surveys. It amounted to 56.1 and 61.2 ... thous. t respectively. During the rest of the period the hydroacoustic assessment of krill aggregation ... of perimeter. The midwater trawl hauls were made periodically. The average estimates of krill ...
Meeting Document : WG-CEMP-92/33 : Auteur(s): L.G. Maklygin, V.N. Shnar, A.V. Remeslo, A.P. Malyshko, I.A. Trunov, I.A. Barabanov, V.P. Shopov (Russian Federation) and A.G. Shepelev (Ukraine)
-
Models of tag shedding for double tagging as a function of time at liberty and approximate solutions for the single tagging model in CASAL
) and Hillary et al. (2006) to apply the square of the individual tag loss annual rate in CASAL over ... Abstract: The model of tag shedding implicit in CASAL is that of Kirkwood and Walker (KW) (1984 ... present to correctly apply the KW model for fish released with two tags. The solution of Dunn et al. (2005 ... -estimates the correct proportion of fish that have retained at least one tag, and are therefore detectable ...
Meeting Document : WG-SAM-11/12 : Auteur(s): S.G. Candy (Australia)
-
Precautionary spatial protection to facilitate the scientific study of habitats and communities under ice shelves in the context of recent, rapid, regional climate change
will lead to the loss of existing marine habitats and the creation of new habitats. In general, fauna ... nutrient input, there may be consequent loss of some species or communities. Colonisation of new habitats ... the Antarctic Peninsula region. One of the most evident signs of climate change has been ice shelf ... collapse; overall, 87% of the Peninsula’s glaciers have retreated in recent decades. Ice shelf collapse ...
Meeting Document : WG-EMM-12/34 : Auteur(s): P.N Trathan, S.M. Grant (United Kingdom), V. Siegel and K.-H. Kock (Germany)
-
Network characterisation of the food-web of the Ross Sea, Antarctica
pronounced peak in biomass in the lower-middle part of the food-web, a result of high biomass of ... Abstract: A balanced ecosystem model is used to explore the system-level characteristics of the ... food-web of the Ross Sea shelf and slope before the advent of commercial fishing for Antarctic ... toothfish (Dissostichus mawsoni) in the region. We evaluate: (1) biomass and flow of organic matter by ...
Meeting Document : WG-EMM-12/53 : Auteur(s): M.H. Pinkerton and J.M. Bradford-Grieve (New Zealand)
-
On the problem of diurnal migrations of some fish species on the South Georgia shelf (Subarea 48.3)
substantial variations in middle size fry of both species were found at different depth levels during 24-hour ... Abstract: The results of experiments on the South Georgia Shelf carried out in the period of 1986 ... to 1990 have been presented. Six (6) daily stations were occupied where vertical distribution of fry ... and young individuals (including adult specimens) of Champsocephalus gunnari, Champsocephalus aceratus ...
Meeting Document : WG-FSA-99/64 : Auteur(s): I.A. Trunov, J.A. Frolkina and M.P. Konstantinova (Russia)
-
Areal and seasonal extent of sea-ice cover off the northwestern side of the Antarctic Peninsula: 1979 to 1996
Paper Title: Areal and seasonal extent of sea-ice cover off the northwestern side of the ... Antarctic Peninsula: 1979 to 1996 Abstract / Description: Analysis of seasonal sea-ice cover of an area ... measuring 1.25 x 10 6 km 2 off the northwestern side of the Antarctic Peninsula indicates that there were ... four periods of extensive ice cover during the last 18 years. Variability in seasonal timing, areal ... possible to the middle day of each month. Images were rejected when areas of missing data impinged on the ... whales or a loss of sea-ice due to environmental warming. Polar Biol . , 11: 525-531. Claire Hansen ... EXTENT OF SEA-ICE COVER OFF THE NORTHWESTERN SIDE OF THE ANTARCTIC PENINSULA: 1979 TO 1996 R.P. Hewitt ... Southwest Fisheries Science Center PO Box 271, La Jolla CA 92038, USA Abstract Analysis of seasonal ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 65–73 : Auteur(s): Hewitt, R
-
Annual changes in species composition and abundance of myctophid fish in the north of South Georgia (Subarea 48.3), Antarctica, during austral winters from 2002 to 2008
Paper Title: Annual changes in species composition and abundance of myctophid fish in the north ... of South Georgia (Subarea 48.3), Antarctica, during austral winters from 2002 to 2008 Abstract ... / Description: Species composition and abundance of myctophid fish were analysed using the fish by-catch ... north and northwest of South Georgia, Antarctica, during austral winters from 2002 to 2008. A total of ... composition suggests that this species may migrate south from the mother population located to the north of ... from the mother population located to the north of the Antarctic Polar Front. (iii) Annual changes ... CCAMLR has expressed concerns about the impact of incidental catch in the krill fishery on some fish ... fishing season to collect information on the incidental catch of juvenile fish (Kiyota and Iida, 2009 ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 155–163 : Auteur(s): Iwami, T., M. Naganobu, K. Taki and M. Kiyota
-
An assessment of the impact of krill fishery on penguins in the South Shetlands
Paper Title: An assessment of the impact of krill fishery on penguins in the South Shetlands ... Abstract / Description: An assessment of the competition between the Japanese krill (Euphausia superba ... the northern shelf of either Livingston or Elephant Island. In contrast, food consumption by penguins ... is estimated to be high to the north of King George, Nelson and Robert Islands (9 746 tonnes/10-day ... Demer (1993). (3) Distribution of krill catches in the middle 10 days of March 1991. Impact of the ... CCAMLR Science, Vol. 1: 107-128 AN ASSESSMENT OF THE ... IMPACT OF THE KRILL FISHERY ON PENGUINS IN THE SOUTH SHETLANDS T. Ichii, M. Naganobu and T. Ogishima ... National Research Institute of Far Seas Fisheries 5-7-1, Orido, Shimizu, 424 Japan Abstract An ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 107–128 : Auteur(s): Ichii, T., M. Naganobu and T. Ogishima