Search results
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Krill (Euphausia superba) distribution in relation to water movement and phytoplankton distribution off the northern South Shetland Islands
after extraction with 90% acetone (Strickland and Parsons, 1972). 2.2 Hydroacoustic Studies ... the present survey. Before (29 October 1990) and after (26 March 1991) of the cruise, the echo-integrator ... in the source level and receiving sensitivity of the echo-integrator after the cruise. 2.3 Drifting Buoy ... to operate for more than 50 days, while the other three failed shortly after deployment. Figure 7 shows ... phytoplankton distribution off the northern South Shetland Islands Abstract / Description: In December/February ... 1990/91 a survey was conducted by RV Kaiyo Maru in the vicinity of the South Shetland Islands and ... Elephant Island. The main objective of the survey was to investigate the mechanisms responsible for the ... concentration of krill and to estimate krill biomass in the area surveyed. Krill biomass estimation was done by ...
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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Quantifying vessel performance in the CCAMLR tagging program: spatially and temporally controlled measures of tag-detection rates
tagged fish have been inconclusive due to low numbers of recaptures after controlling for spatial ... reliability of vessels in detecting tagged fish have been inconclusive due to low numbers of recaptures after ... (Agnew et al., 2005; Dunn et al., 2009; Mormede et al., 2011c). How- ever, after controlling ... been inconclusive due to low numbers of recaptures after controlling for spatial and temporal ... on 1 December each year, and ends when the quota has been fully caught which, in recent years, has been ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 73–80 : Author(s): Mormede, S. and A. Dunn
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Biological characteristics of Antarctic fish stocks in the southern Scotia Arc region
that Lepidonontothen squamifrons was spawning while Trematomus hansoni was already coming to the end of its ... ;was spawning while Trematomus hansoni was already coming to the end of its reproductive season.  ... coming to the end of its reproductive season. Chionodraco rastvospinostis and Trenzatomzis eulepidottis ... was depleted within two seasons after about 500 000 tonnes had been taken (CCAMLR, 1990a). After some years ... were closed to commercial finfishing after the 1989/90 season (CCAMLR, 1990b). Biological ... and Quintero, 1989) and bottom trawl again in 1991 (Balguerias, 1991) after some limited research had been ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 1–41 : Author(s): Kock, K.-H., C.D. Jones and S. Wilhelms
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Seabird by-catch by autoline vessels: do line setters increase the sink rate of integrated weight longlines?
magazines in a pair marked either the beginning, or end, of the use of the line setter for each pair. Four ... ) the line became slack after only a few seconds had elapsed. Deployment of multiple TDRs enabled assess ... in insulation tape. Both ends of the snoods were woven into the fabric of the longline so that the snoods lay ... ) of trial lines to avoid the pull-down effect of the anchor at the beginning of lines. The water entry ... Paper Title: Seabird by-catch by autoline vessels: do line setters increase the sink rate of ... m –1 lead core) longlines by some autoline vessels in the Kerguelen and Crozet Islands Patagonian ... . A trial was conducted in the Ross Sea to determine the effectiveness of line setters in increasing ... the sink rates of IW longlines. Time-depth recorders were deployed on lines set with and without a ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 107–114 : Author(s): Robertson, G., J. Williamson, M. McNeill, S.G. Candy and N. Smith
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Improving estimates of Adélie penguin breeding population size: developing factors to adjust one-off population counts for availability bias
, throughout the breeding season and standardisation of the time series to a reference point one week after ... of the time series to a reference point one week after the peak in egg laying, consistent with Standard ... to a reference point one week after the peak in egg laying, consistent with Standard Method A3 of the CCAMLR ... populations. Adélie penguins begin arriving at their breed- ing sites around mid-October, with adult numbers ... as females leave the breeding site shortly after laying their eggs around mid- November (Davis, 1988 ... present after the last eggs have been laid, or equivalently around a week after the peak in egg laying ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 229–241 : Author(s): Southwell, C., J. McKinlay, L. Emmerson, R. Trebilco and K. Newbery
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Supplementary data on exploited stocks in Division 58.5.1 (Kerguelen)
) in a comparable period. The stock of Notothenia squamifrons shows a very low biomass value in 1987 and 1988. After ... ) in a comparable period. The stock of Notothenia squamifrons shows a very low biomass value in 1987 and 1988. After ... squamifrons shows a very low biomass value in 1987 and 1988. After a continuous reduction in average length ... e/eginoides debido a la carencia de datos recientes de pesca. 149 1 . INTRODUCTION After two seasons ... between the two sexes has been noted (Figure 3). The annual growth period begins in December ... on the Kerguelen Shelf stock for both sexes (Lt=33.3 and 33.5 cm in 1988/89) (Figure 6). After a continued ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 147–161 : Author(s): Duhamel, G.
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A hypothetical life cycle for Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea region
of toothfish larvae after an 18–24 month period were moderately consistent with the distribution ... environmental model (HiGEM). Model outputs indicated that the locations of toothfish larvae after an 18–24 ... (HiGEM). Model outputs indicated that the locations of toothfish larvae after an 18–24 month period ... m. For the simulations reported here, the floats were released at the end of June and the loca- tions of the floats were ... plotted after periods of 6, 12, 18, 24 and 36 months. The drifting period was extended to 36 months ... passively after a period of 18–24 months. results Timing and location of spawning The timing ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 35–53 : Author(s): Hanchet, S.M., G.J. Rickard, J.M. Fenaughty, A. Dunn and M.J. Williams
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Preliminary appraisal of Antarctic fish selection by the 32/36 bottom trawl combined with various codends
: the codend used had open splitting straps. Only after hauling the codend on board, both ends of straps were ... liner was used. Mesh sizes were measured wet, after a certain number of hours of towing time ... with a length of up to 35 cm at a 80-90% level clearly ends at this length. with respect to longer fish ... size was 123.6 mm, after the first two and after 30 hours of the codend exploitation its mesh size ... Paper Title: Preliminary appraisal of Antarctic fish selection by the 32/36 bottom trawl combined ... . It was found that the selectivity properties of twine codends are unsatisfactory in the case of ... Antarctic icefish, bumphead notothenia, and Scotia Sea icefish. This was primarily caused by the heavy net ... some Antarctic fish, which make it difficult for them to escape from the codend. Selectivity properties ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 1-48 : Author(s): Zaucha, J.
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Distribution, biomass and characteristics of the Euphausia superba fishery around South Georgia (Subarea 48.3)
krill biomass for the area. It was therefore only possible to begin to explain the reasons ... for the variability in the scale of krill swarms and to attempt to determine more reliable values of its biomass after ... only possible to begin to explain the reasons for the variability in the scale of krill swarms ... and to attempt to determine more reliable values of its biomass after a number of census surveys had been ... for the area. It was therefore only possible to begin to explain the reasons for the variability in the scale ... of krill swarms and to attempt to determine more reliable values of its biomass after a number of census ... al., 1984). After being carried along by the drift into the island's waters krill is retained here ... . After a time, however, the situation returns to its initial condition. Interannual changes in krill ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 123–147 : Author(s): Latogursky, V.I., R.R. Makarov and L.G. Maklygin
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Preliminary analyses of data collected during experimental phases of the 1994/95 and 1995/96 Antarctic crab fishing seasons
1 should be undertaken a t the beginning of the first season in which a vessel participates ... i n the densities of Antarctic crabs (SC-CAMLR, 1993). Phase 2 should take place at the beginning of the second ... . Phase 3 is designed to provide information about recovery/recmitment rates after depletion events (SC ... immediately following the end of this meeting (when the vessel's second season of participation ... Paper Title: Preliminary analyses of data collected during experimental phases of the 1994/95 and ... 1995/96 Antarctic crab fishing seasons Abstract / Description: Data collected on board the FV American ... Champion during Phases 1 and 2 of the experimental crab fishery were analysed using generalised additive ... models and depletion estimators. Results from the generalised additive models show that the density of ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 141–159 : Author(s): Watters, G