Search results
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Distribution of krill (Euphausia superba Dana) catches in the South Shetlands and South Orkneys
and South Orkneys Abstract / Description: A set of concentric zones of 20 km width was defined around ... in all years 1988 to 1991. In 1987, 1988 and 1991, 75% of the catch in Subarea 48.2 between December ... ranges and population sizes from the literature are used to show that for some years catches within 100 ... A set of concentric zones of 20 km width was defined around selected colonies of penguins ... square (1 0 longitude by 30' latitude) for each quarter (three months) of the year. Total catches ... in the subarea for the year which is caught in the CPD is given, together with the catch as a percentage ... .c. 70 J:! tfJ 0 () 50 -0 40 a-e 30 20 10 0 0 0 0 N ~ -0 0 0 0 0 0 co ... I .!: I ............... 1988 () ro +- I 0 I - - - 1989 () 50 '0 • ,- 40 I / ~ I _J -. - - 1990 30 . . I tI --20 tI ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 287–303 : Author(s): Agnew, D.J.
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Modelling catch and effort data using generalised linear models, the Tweedie distribution, random vessel effects and random stratum-by-year effects
;fishing year’ parameter estimates together with ‘baseline’ parameter estimates ... distribution, random vessel effects and random stratum-by-year effects Abstract / Description: The current ... of standardised CPUE estimates and their precision can be obtained from the ‘fishing year’ parameter estimates ... together with ‘baseline’ parameter estimates, their variance–covariance matrix, and the inverse-link ... in the GLMM were cruise and stratum-by-year interaction. These two random-effect terms were assumed ... term redundant), two vessels were completely confounded with YEAR, with S-plus giving missing values ... 20 30 40 50 -0 .6 -0 .4 -0 .2 0. 0 0. 2 0. 4 0. 6 Ship index R an do n ef fe ct e st ... im at e 0 10 20 30 ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 59–80 : Author(s): Candy, S.G
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Investigations of required sampling regimes for environmental parameters
temperature over two years with a significance α of 0.05 and a power P of 0.8. Sampling wind speed ... mean temperature over two years with a significance α of 0.05 and a power P of 0.8. Sampling wind ... continuously or as daily maxima and minima would be sufficient to detect a 10 to 20% change in monthly mean log ... speed continuously or as daily maxima and minima would be sufficient to detect a 10 to 20% change ... day 10-20% High recording for one month daily multiple n-30 10-20% High recording ormax/min ... be sufficient to detect a 2 to 3°C change in monthly mean temperature over two years with a significance ... lower than for the other two years (see Figure 1). Maximum and minimum temperatures had means of 3.62 ... , for two years of monitoring, is shown in Table 2. Summary information for the months December to March ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 561–573 : Author(s): Agnew, D.J.
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An overview of Southern Ocean zooplankton data: abundance, biomass, feeding and functional relationships (submitted to the 2008 Joint CCAMLR-IWC Workshop)
for differences in the extent of identification of early larval stages. Likewise, the time of year, depth ... <30% of primary production. This emphasises the dominant role of microbial food chains involving ... , the time of year, depth of sampling and mesh size of sampler greatly influence the recorded abundance ... in the SO, since mesozooplankton typically remove <30% of primary production. This emphasises ... of those above. A change in the view of SO copepods in the last 20 years has followed an increase ... -lived, with E. superba having a life span of 5–7 years (Siegel, 1987). Two years has been suggested ... appears flexible, being one at Kergue- len (Labat et al., 2002) and one to two (Watts and Tarling, 2012 ... of early larval stages. Likewise, the time of year, depth of sampling and mesh size of sampler greatly ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 171–218 : Author(s): A. Atkinson, P. Ward, B.P.V. Hunt, E.A. Pakhomov and G.W. Hosie
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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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Exploratory fishing for Dissostichus spp. in the Antarctic region (Subareas 48.1, 48.2 and 88.3)
longlines were set between 290 and 350 m (station no. 20), and in Bransfield Strait, where one end ... . However, the results obtained make it possible to identify two fish groups in the study area. One group ... 2 30 20 10 0 0 1 2 3 4 Repletion index Figure 6: Stomach repletion in Dissosticlzus rnawsoni ... Ifocean Austral pacifique (61°24'S) jusqu'8 la mer du Scotia, dans I'oc6an Austral atlantique (58'03 ... Paper Title: Exploratory fishing for Dissostichus spp. in the Antarctic region (Subareas 48.1 ... , 48.2 and 88.3) Abstract / Description: During February and March 1998, a 43-day cruise on FV Tierra ... system) were used for the operation, with variable quantities of fish hooks (1 440 to 4 320), No. 9 ... /hook (Subarea 88.3), 19.1 g/hook (Subarea 48.1) and 3.0 g/hook (Subarea 48.2), and an average over all ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 1–17 : Author(s): Arana, P.M. and R. Vega
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Composition and characteristics of ichthyofauna in pelagic waters of South Georgia (Subarea 48.3)
and adult fish was also different. Large fishes were most often taken near the bottom, while small ones were ... were most often taken near the bottom, while small ones were caught in the water column. The main food ... (1990) over one to two days. Each series consisted of five to seven tows of 10 to 20 minutes duration ... the day, two to three at night and one at dawn and one at dusk (a total of 36 tows per 24-hour period ... than l year Extreme values are given for C. gunnari at Shag Rocks Gizhiga Cruise 28 30 ... mm varied over the depth layer. Large individuals were caught years from 1 to 20% (Figure 9, Table ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 125–164 : Author(s): Frolkina, G.A., M.P. Konstantinova and I.A Trunov
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A preliminary assessment of the stock of the ommastrephid squid Martialia hyadesi in the Scotia Sea based on data from predators
a further 51 400 tonnes. M. hyadesi probably has a life span of two years and a circumpolar distribution ... . M. hyadesi probably has a life span of two years and a circumpolar distribution, but its biology and ecology ... target species from two families, Loliginidae and Ommastrephidae. Fisheries for the latter have been ... Cephalopod fisheries world-wide mainly target species from two families, Loliginidae ... . M. hyadesi probably has a life span of two years and a circumpolar distribution, but its biology and ecology ... ** Abstract Cephalopod fisheries world-wide mainly target species from two families, Loliginidae ... ans, et une repartition circumpolaire, mais sa biologie et son ecologie res tent pratiquement ... ~OBOrO BblJlOBa H tlaCTblMH nepexo- ~aMH Ha 3KCnJIyaTaIJ,HIO npOtlHX BH~OB. TaKHM 06pa30M BepOSITHO ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 479–480 : Author(s): Rodhouse, P.G.
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Selectivity of standard Polish commercial trawl codends on Antarctic fishing grounds
Abstract / Description: Selectivity studies were carried out for two types of steelon codends used ... Selectivity studies were carried out for two types of steelon codends used in commercial fishery ... in a more precise, comparative way, two ogives were presented in Figure 10, one for each type of codend ... 23.0 L100 35.0 30.0 39.0 L2s 20.0 20.1 20.6 L7s 22.5 24.0 26.0 Table 9: Main selection indices ... 1 50 ~o ~ I ! I • )' I I I / B / / /: I I I I I ./e r-=- 20 30 Figure ... ,--L-,-_,--__ ,J __ -,-_--.-_--,-o_..-_, __ ...,.--_,.--_...,.--__ 20 30 1.,0 50 [CM] I=\S+\ LENCHl Selection of bumphead ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 107-142 : Author(s): Zaucha, J.
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An assessment of the merits of length and weight measurements of Antarctic krill Euphausia superba
in the precision of prediction. Surprisingly, the stage of the moult cycle of the animal has little effect upon ... . Surprisingly, the stage of the moult cycle of the animal has little effect upon length-weight relationships ... of prediction. Surprisingly, the stage of the moult cycle of the animal has little effect upon length-weight ... Universitat Kiel, Dusternbrooker Weg 20, 2300 Kiel, Federal Republic of Germany. Les relations publiees des ... a une precision de prediction bien superieure. Contrairement a ce qu'on pourrait attendre, le stade du ... cycle de la mue de l'animal a peu d'effet sur les relations longueur-poids. Par contre, l'utilisation ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 371-373 : Author(s): Morris D.J., J.L. Watkins, C. Ricketts, F. Buchholz, and J. Priddle