Résultats de la recherche
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Sea-surface temperature and krill catches around South Georgia in December–February 1989–1991 and 1999–2001
. Analyses of the data at the beginning of each summer season could enable us to evaluate the potential for ... conducting a krill fishery in the area during the entire year. The reliability of these forecasts could be ... considerable decrease in mean SST off South Georgia. This observation is especially obvious for the northern ... up to +0.71°C in 1990/91, whereas it was-1.2°C in 2000/01 (for the 1999/2000 season the SST anomaly ... the entire year. The reliability of forecasts for krill catches based on hydrological information ... Georgia waters (Subarea 48.3) for December–February of 1989–1991 and 1999–2001. Year Month Cell 1 Cell ... could be verifi ed only by comparing forecasts with actual krill catches for a number of years. The ... , including the shelf zone which is most productive for krill fi sheries. The SST anomaly sign on the shelf ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 165–174 : Auteur(s): Vanyushin, G.P
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The use of analysis of penguin stomach contents in simultaneous study of prey and predator parameters
proposed as being the correct approach for analysis because lack of independence between krill specimens ... type of analysis. This method of analysis demonstrated that there was an insignificant F-statistic for ... our attention to the size selectivity problem. 370 Table 1: One factor ANOVA for two random ... Probability 8.01 0.004772 Table 2: Nested ANOVA for two random groups of penguins. See text for discussion ... -.. "'" .' .'"."."." " ....... "--.... '" .. " .. " ............ " . --. " .. ""." .......... " ... "." ..... " .... -.. " .. --." .. --............... ' ... " ---......... " ............. " ..... -.. " .. ,,' ...... . .._ ...... o IL-______________ L-______________ ~ ______________ J-______________ ~ o 10 20 30 40 dec 13 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 367–375 : Auteur(s): Marschoff, E. and B. González
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Preliminary analyses of data collected during experimental phases of the 1994/95 and 1995/96 Antarctic crab fishing seasons
suggested that depletion estimators will not be appropriate tools for estimating local abundances of P ... liberty for about one to five weeks. The recaptured crabs had minimum movement rates of 0.08 to 0.25 n ... miles/day. Mark-recapture estimates of standing stock and density were made for the area around Phase 2 ... attempts were made to account for biased sampling of recaptured crabs and the movement of crabs away from ... experiments, CCAMLR INTRODUCTION The Commission has adopted an experimental harves t regime (EHR) for ... extended (in a slightly revised format) for another three f ishing seasons (to the 1997/98 split-year ... predict the expected value of CPUE for positive hauls. The two GAMs were fitted and evaluated according ... ) provided a formula for making an unbiased estimate of population size ( 6 ) from mark-recapture data ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 141–159 : Auteur(s): Watters, G
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Growth and age/length structure of populations of Notothenia (Lepidonotothen) squamifrons (Nototheniidae) in various areas of the Indian sector of the Southern Ocean
paper. It was found that during the first years of life the linear growth rate is 3 to 5 cm per year. It ... g at the banks and 153 to 188 g in the Kerguelen Island area were recorded for fish at age 6 to 12 ... decreases by a maximum of 1 cm during the last years of life. Maximum annual weight increments of 100 to 120 ... composition of catches are also examined in this paper. On the Ob and Lena Banks this composition is fairly ... the Lena Bank begins at an earlier age than in other areas (Table 1). Weight gain values for the Ob ... reach maturity at the age of 7 to 8 and the bulk of the catch for 1985 to 1987 comprised 6 to 7 year ... 'I 'I 'I 1000 500 fO 20 30 Y Y 'I 40 2/ / / / / / / / , ,1 I I ... 1972; 2=1980 to 1986. 133 30 20 f978 n=770 t=7,5 fa 20 (979 n=2327 fa 20 1980 (1;5426 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 123–139 : Auteur(s): Zaitsev, A.K.
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Analysis of trends in Japanese krill fishery CPUE data, and its possible use as a krill abundance index
Japanese krill fishery for the 1980/81 to 2003/04 fishing seasons were analysed. For a number of ... have some value as abundance indices. Standardised CPUE for the pelagic areas showed significant ... vessels. It is also mportant to undertake the same kind of analysis for fleets from other fishing nations ... the patches). For example, even if local density is the same, if an aggregation is tighter rather ... CPUE indices for the whole of Area 48 across months. Kawaguchi et al. 6 CPT showed an increase ... considerable uncer- tainty regarding predictions for the September to Novem ber period. CPD showed an increase ... krill availability. CPST is an index calculated for the whole of Subarea 48.1, whereas other indices ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 1–28 : Auteur(s): Kawaguchi, S., S. Candy, S. Nicol, K. Taki and M. Naganobu
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Seabird by-catch by autoline vessels: do line setters increase the sink rate of integrated weight longlines?
depth of longlines for given distances astern. This increase in depth is minor and unlikely to result in ... the sink rates of IW longlines. Time-depth recorders were deployed on lines set with and without a ... structure. For each of these last two sub-models, separate variance parameters at each depth were combined ... tension several metres astern (depending on sea state) and at an angle to the sea surface. Tension ... ) programmed to record depth at 0.5 m resolution every second. The TDRs were attached to the longline on 30 ... ) the depth of longlines for given distances astern. This increase in depth is minor and unlikely to ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 107–114 : Auteur(s): Robertson, G., J. Williamson, M. McNeill, S.G. Candy and N. Smith
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Distribution of mackerel icefish (Champsocephalus gunnari) (Channichthyidae) around South Georgia at various stages of its life cycle
(i.e. by 3 years old) most C. gunnari migrate northwards, where they remain for most of the year ... from time to time an entire year class may be absent from catches taken over several years (Frolkina ... of C. gunnari at different temporal (diurnal, season, year) and spatial scales for each ... / 19 86 L en gt h ra ng e (m m ) 60 –1 30 80 –1 30 60 –1 40 70 –1 20 M od al le ng th ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 49–69 : Auteur(s): Frolkina, Zh.A
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The use of patent databases to predict trends in the krill fishery
/ Description: The fishery for Antarctic krill (Euphausia superba) caught 210 000 tonnes in 2009/10 with ... Secretariat so that it can annually update a register of krill-related patents which will be of use for ... currently informed by data on annual catches and by CCAMLR’s annual notification procedure. There has been ... information can be used in combination to provide information to the Commission on potential changes in the ... Figure 3: Patents related to uses of krill for Aquaculture purposes, 1973–2008. 0 10 20 30 40 50 ... ts Figure 4: Patents related to uses of krill for Human Use purposes, 1973–2008. 0 10 20 30 40 ... : Percentages of total patents lodged by most patent active countries, in year groups. 0 10 20 30 40 50 ... Commission on any of the fac- tors that might drive an increase in the fishery for Antarctic krill, so the ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 135–144 : Auteur(s): Foster, J., S. Nicol and S. Kawaguchi
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The role of fish as predators of krill (Euphausia superba) and other pelagic resources in the Southern Ocean (submitted to the 2008 Joint CCAMLR-IWC Workshop)
: Krill forms an important part of the diet of many Antarctic fish species. An understanding of the role ... when these areas were exploited commercially for Electrona carlsbergi. Currently, the best estimates of ... Southern Ocean. Ecosystem models therefore need to account for their role. However, several key areas of ... uncertainty exist, which need to be considered in ecosystem and food-web models for the Southern Ocean. For ... estimates of fish stocks were available for the split-years (1 July to 30 June) 1975/76 and 1977/78 (Table ... to estimate an overall abundance estimate for N. coriiceps on the shelf. Biomass after ... resource for skates and slope and deep-sea fishes such as grenadiers at certain times of the year ... fast ice, including flaws, leads and polynyas) for most of the year (Kock, 1992). The shelf and ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 115–169 : Auteur(s): Kock, K.-H., E. Barrera-Oro, M. Belchier, M.A. Collins, G. Duhamel, S. Hanchet, L. Pshenichnov, D. Welsford and R. Williams
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Killer whale (Orcinus orca) and sperm whale (Physeter macrocephalus) interactions with longline vessels in the Patagonian toothfish fishery at South Georgia, South Atlantic
the fishing effort on the different grounds, although some ‘hotspots’ for interactions were noted ... , were present during 5% of haul observations. A high inter-vessel variation was noted for interactions ... of unrecorded fish removals on stock assessment models, modifications in the behaviour of marine ... hauling site. Observers reported that when vessels steamed away for between 20 and 30 n miles, killer ... vicinity of vessels during hauling had an impact on catch rates. For these analyses the catch rates of ... vessels in 2001 and 11 of 15 vessels in 2002 were analysed (Table 1). For the purpose of this study an ... H 302 14 4.6 46 15.2 0 0 I 319 14 4.4 78 24.5 20 6.3 J 712 30 4.2 119 16.7 14 2 K 346 12 3.5 18 ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 111–126 : Auteur(s): Purves, M.G., D.J. Agnew, E. Balguerías, C.A. Moreno and B. Watkins