Search results
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A preliminary investigation of the possible effects of rhizocephalan parasitism on the management of the crab fishery around South Georgia
year after having attained sexual maturity, so that they have one opportunity to breed before being ... males are considered at this stage because only males are being harvested. Females should be included ... animals is not being harvested, since they are below the age-/size-at-first-capture. The absolute number ... possible implications of parasitism for management are investigated by considering a population model that ... contrasted with the effects of harvesting healthy animals only. Equilibrium and transition dynamics of the ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 175–192 : Author(s): Basson, M
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Estimating krill recruitment and its variability
and above) of 0.339 with a standard deviation (SD) of 0.100. The corresponding result for recruitment ... nine surveys is 0.552 with a standard deviation of 0.074. A number of the assumptions needed for ... for calculating R(t). If we assume that the length distributions have normal distributions with a ... not particularly interested in their values, except that they should be consistent with what is ... mixture distribution with parameters R(t) and 8. Note that estimating R(t) and 0 requires maximising h(R ... ), is the ratio of the numbers in age class t to the numbers in that age class and above, that is ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 55–69 : Author(s): de la Mare, W.K
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Krill (Euphausia superba Dana) resources and distribution in the Wilkes Land area in the seasons 1986 to 1989
. The total biomass of krill in the Wilkes Land area was assessed as being about 1x10 6 tonnes. File: 09 ... in the Wilkes Land area was assessed as being about 1x106 tonnes. ... area was assessed as being about 1x1()6 tonnes. Resume Les resultats des campagnes d'evaluation de ... cy.z:.Ha, npl-l aTOM O.z:.HO 1-13 HI-IX BeJIO npOMbICeJI KPl-lJISI B KOMMeplleCKOM pe:>KI-IMe. PatioH ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 149–162 : Author(s): Dolzhenkov, V.N. and V.P.Timonin
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Protecting young fish and spawning aggregations of Champsocephalus gunnari in Subarea 48.3 (South Georgia): a review
, during which the entire catch limit can be taken, rather than fishing activity being more spread out ... season as being introduced specifically to protect spawning. Kock concluded that the spawning ... , 1999) provided evidence of spawning being concentrated in inshore waters in April and May ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 75–86 : Author(s): Parkes, G.B
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Estimates of fish stock biomass around South Georgia in January/February 1985
. gibberifrons and Ps. georgianus were at a level of about 25 – 40% of that of the pristine state. The stocks ... reduction in stock size to 10 – 20% of that estimated before the onset of heavy fishing. In C. gunnari the ... influence. Furthermore it should be noted that it is still not known which proportion of t he juvenile ... . Even though the variance is very high indicating that the estimated stock size may only be corfect to ... composition (fig.6) indicates that with the exception of the early juve- - 6 - niles (age class O and 1 ... - straints, however, stock size is assumed to be very low in comparison to tha t of 141 000 t at the onset ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/2 (Selected Scientific Papers, SC-CAMLR-SSP/2) : 1-32 : Author(s): Kock, K.-H.
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Further computations of the consequences of setting the annual krill catch limit to a fixed fraction of the estimate of krill biomass from a survey
no PRnaM HeOIlpeneneHHOCTH ,QnR HeKOTOPbIX napaMeTpOB MOAeJlH. ~ P R B O Q R T C X BenMYMHbl Be ... . This prevents the full intended catch being taken in the year concerned. This different behaviour is more ... fonction de y. ~ H ~ Y ~ H H I I y H 6. COTJI~CHO 3THM 3HaYeHWIIM BePOIITHOCTb TOTO, YTO IICTOqeHHe ... , I I p ~ ~ b l C n ~ ~ b l f i Ce3OH (a); (iii) aIIpenb-~eHTR6pb, I I p ~ ~ b l ~ n ~ B b t f i Ce3OH (b); Pi (iv) BeCb rOA ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 81–106 : Author(s): Butterworth, D.S., G.R. Gluckman, R.B. Thomson, S. Chalis, K. Hiramatsu and D.J. Agnew
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Preliminary study on nesting Adélie penguins disturbance by unmanned aerial vehicles
colony being monitored (Figure 2). To determine a suitable flight altitude, pre- liminary test flights ... the territories of nesting penguins and being attacked by them or triggering agonis- tic interactions between ... nesting birds. No non- breeding penguins were seen running through the nesting group that was being ... overflights suggests that non-breeding birds present in the colony (but out- side the group being filmed ... with penguins looking up and around for a few seconds when the UAV was overhead. Similar symptoms of ...
Science Journal Paper : CCAMLR Science, Volume 23 (CCAMLR Science, Volume 23) : 1–16 : Author(s): Korczak-Abshire, M., A. Kidawa, A. Zmarz, R. Storvold, S.R. Karlsen, M. Rodzewicz, K. Chwedorzewska and A. Znój
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Long-term monitoring of krill recruitment and abundance indices in the Elephant Island area (Antarctic Peninsula)
permutations of the data are now carried out only between the pairs of years being compared; the other data ... for the Elephant Island area with regard to the representativeness of the study area (60°-62 o 30´S ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 19–35 : Author(s): Siegel, V., W. de la Mare and V. Loeb
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The effects of monitoring procedures on Adélie penguins
to reduce disturbance to a minimum in the Adklie penguin colony being monitored at Bkchervaise Island (67 ... identification (such as the implanted transponders presently being tested) should be considered for use ... E. superba HeM3BeCTHO; TaKUM 0 6 p a 3 0 ~ 3HaYeHMII. OTMeYeHHbIe 3Be3fl0Y~ofi, He 6b1nu BKJIIoYeHbI ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 155–164 : Author(s): Clarke, J. and K. Kerry
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Diurnal variations in biological characteristics of krill, Euphausia superba Dana, to the west of the South Orkney Islands, 24 March to 18 June 1990 - based on data reported by a biologist-observer
par les pecheries commerciales. Pe310Me IICCJIe,llOBaHIUI ,llHeBHbIX H3MeHeHHH B pa3MepHOM COCTaBe ... ,llHeH ,llJIHHbI caMU;OB H caMOK B 06JIaBJIHBaeMOM CJIoe. llHeBHbIe H3MeHeHH.5I B pa3MepHOM COCTaBe ... B pa3MepHOM COCTaBe B YJIOBaX KPHJI.5I 6bIJIH MeHee .5IBHbI HJIH Bo06111e He 06HapY:>KHBaJIHCb. B HaCTO ... B COCTaBe KPHJI.5I; (i) nOCJIeHepeCTOBa.51 cMepTHocTb KpynHbIx oc06eH; (ii) cY:>KeHHe KPHJI.5I ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 201–222 : Author(s): Vagin, A.V., R.R. Makarov and L.L. Menshenina