Search results
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Phytoplankton distribution in the mixed layer: implication to krill abundance
Abstract / Description: A one dimensional Lagrangian model of random walk is presented to study ... A one dimensional Lagrangian model of random walk is presented to study the distribution ... 90 90 100 100 Particle distribution profiles at every 12 hours. Number of particles, Ne, in one ... ) Abstract A one dimensional Lagrangian model of random walk is presented to study the distribution ... distribution du phytoplancton dans I'ocean Antarctique. Vu que I'on possede une connaissance reduite de la ... conductivite, temperature, profondeur, suggerent que le melange dans la couche superieure est moindre que I'on ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 331–356 : Author(s): Yamazaki, H. and T.R. Osborn
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A hybrid approach to acoustic classification and length estimation of krill
/ Description: The problem of acoustically identifying and estimating the sizes of two euphausiid species ... components are the mean ratios of the volume backscattering coefficients, measured at two different ... The problem of acoustically identifying and estimating the sizes of two euphausiid species ... components are the mean ratios of the volume backscattering coefficients, measured at two different ... ) ≈ 12.1afj / fi (mm). If only one frequency ratio is available (two- frequency method), its output can ... conducted in the continental shelf region: E. superba was present in only one haul (two aggregations were ... and that they can be correctly assigned to one of two possible classes ωh = 1,2 on the basis of net sampling ... - tions that the class two (ω2) is actually present but the authors estimate that it is class one (ω1 ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 33–58 : Author(s): Azzali, M., I. Leonori and G. Lanciani
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A first attempt at an assessment of the Patagonian toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands EEZ
-per-unit-effort (CPUE) trend. Application of a simple age-structured production model (ASPM) provides ... catches and a sharply declining longline catch-per-unit-effort (CPUE) trend. Application of a simple age ... of the value of h assumed. This is because the age-at-recruitment assumed for the longline fi shery (6 years ... is essential. To date two aerial and one sea reconnaissance trips have been undertaken by South Africa ... ) trend. Application of a simple age-structured production model (ASPM) provides a robust indication ... presents a fi rst attempt at a quan- titative assessment of the resource, by applying a simple age ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 11–32 : Author(s): Brandão, A., D.S. Butterworth, B.P. Watkins and D.G.M. Miller
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Seabird interactions with longlining operations for Dissostichus eleginoides around South Georgia, April to May 1994
-seven line sets were observed and 98 deaths of seabirds were recorded over 20 sets; no deaths occurred ... to albatrosses. The average mortality rate for the 20 sets was 0.48 birds/1 000 hooks and maximum mortality 3.12 ... were recorded over 20 sets; no deaths occurred during hauls. The 16 sets made at night contributed 15 ... population at South Georgia when compared to albatrosses. The average mortality rate for the 20 sets was 0.48 ... of the type Maguro no. 14 which has a curved point (Figure 1); these hooks were laid as either one or two ... one observer. Every two hours, estimates were made of the total number of birds of each species ... hooks. Mortality and interact~ons of birds with operations varied with site and time of day ... 6ype~ec~~HK1.1 , B03MO>FLHO, OKa3bIBaK)TCX HeIIpOnOPQHOHanbHO ITOABePXeHbl CMePTHOCTH II0 ...
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
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Seabird interactions with trawl and longline fisheries for Dissostichus eleginoides and Champsocephalus gunnari
RPYCOB C ~ P O C O M OTXOflOB nepepa60T~R C 6op~a , IIpOTMBO~OnOXHO~O TOMY, C KOTOpOrO YCTaHaBnMBaeTCR ... and reduce incidental mortality. The trawlers were factory freezer trawlers of which one, Mys Ostrovskogo ... to dive for the baits. Incidental mortality occurred despite measures to divert the birds away from ... breaks of less than one day each. The vessel made an average of five hauls per day (a total of 198 ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 93–99 : Author(s): Williams, R. and D. Capdeville
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Analysis and modelling of the Soviet Southern Ocean krill fleet, II: Estimating the number of concentrations and analytical justification for search data
and one degree of longitude is assumed to be 30 nm. Figures 6 to 9 show the results of the application ... :>KeHHH onHCbIBaeTC5I MeTO,ll BHeCeHH5I nonpaBKH Ha norpeIIIHOCTb B 06HapY:>KeHHH KOHl.(eHTpal.(HH ... kinds of data. First, from the navigational log, one can determine whether krill are present in regions ... the ice edge), they do not give any temporal sense of the hauls. In order to do that, one must adopt ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 283–322 : Author(s): Mangel, M.
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On reproduction of Electrona carlsbergi (Tåning)
, and that of the nucleus reaches 56 to 69 Ilm. The membrane consists of two layers: an internal one - a membrane in itself ... plus ages pendant la phase de croissance trophoplasmatique intensive. Grossissement -20x 10 ... - and an external one, formed by follicular epithelium cells. The cytoplasm is pale and uniform in colour ... which is washed away during treatment of preparations. The external surface of the oocytes is made up ... Paper Title: On reproduction of Electrona carlsbergi (Tåning) Abstract / Description: This paper ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 397–409 : Author(s): Mazhirina, G.P.
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A first step towards modelling the krill–predator dynamics of the Antarctic ecosystem
to the hypothesis of a krill surplus in the mid-20th century is described, and the information on population ... including krill, four baleen whale (blue, fin, humpback and minke) and two seal (Antarctic fur and crabeater ... surplus in the mid-20th century is described, and the information on population and trend levels that has ... , four baleen whale (blue, fin, humpback and minke) and two seal (Antarctic fur and crabeater) species ... . Incorporating regional effects The model developed divides the Antarctic into two regions: one is the Atlantic ... l’on ait besoin d’avoir recours aux hypothèses de changements environnementaux. Un modèle a été créé ... that support this ‘surplus’ krill hypothesis. The estimated trend in age-at-maturity of minke whales ... ., 1999; Zenitani and Kato, 2005). Analyses of catch-at-age data using the ADAPT-VPA method (Butterworth ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 217–277 : Author(s): Mori, M. and D.S. Butterworth
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An assessment of CCAMLR measures employed to mitigate seabird mortality in longlining operations for Dissostichus eleginoides around South Georgia
-chinned petrels, two black-browed albatrosses and one unidentifiable bird caught on hooks. One giant ... -chinned petrels, two black-browed albatrosses and one unidentifiable bird caught on hooks. One giant ... consisted of nine white-chinned petrels, two black-browed albatrosses and one unidentifiable bird caught ... carried two weights of c. 6 to 7 kg at a c. 50 m interval, one half-way along and the other at the end ... number of hooks was laid each night, either on one or two shorter longlines. All deck lights were ... was attended by one or two winchmen working a watch of c. 3 to 4 hours. As they came to the surface, fish ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 217–230 : Author(s): Ashford, J.R. and J.P. Croxall
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Precautionary spatial protection to facilitate the scientific study of habitats and communities under ice shelves in the context of recent, rapid, regional climate change
Peninsula region. One of the most evident signs of climate change has been ice-shelf collapse; overall, 87 ... . Designation of areas under ice shelves as areas for scientific study would fulfil one of the recommendations ... Peninsula region. One of the most evident signs of climate change has been ice-shelf collapse; overall, 87 ... one of the recommendations made by the Antarctic Treaty Meeting of Experts in 2010. ... in the Antarctic Peninsula region. One of the most evident signs of climate change has been ice-shelf collapse ... would fulfil one of the recommendations made by the Antarctic Treaty Meeting of Experts in 2010 ... /to the lower surfaces. Changes in mass balance will affect the extent the ice shelf reaches from land. One ... Response of the Antarctic Bottom Fauna. PLoS ONE 4 (2): e4385, doi: 10.1371/journal.pone.0004385. ATCM ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 139–151 : Author(s): Trathan, P.N., S.M. Grant, V. Siegel and K.-H. Kock