Search results
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By-catch of fish in the krill fishery
are reported of icefish being taken as by-catch during krill fishing operations from a research vessel ... Observations are reported of icefish being taken as by-catch during krill fishing operations from ... I. Everson1, A. Neyelov2 and Y.B. Permitin3 Abstract Observations are reported of icefish being taken ... and Channichthyidae being taken in experimental trawls. Both Slosarczyk and Rembiszewski (1982) and Rembiszewski et ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 381–401 : Author(s): Everson, I., A. Neyelov and Y.B. Permitin
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Attribtuion of acoustic echoes to squid in the south Atlantic
in the previous year had suggested that this area was being actively targeted by foraging birds ... oceanographic conditions there, although these would be necessary if the acoustic data were being used ... = -1) in the speckle-only subset (Figure 4b). These observations are consistent with the targets being composed ... order to characterise an acoustic signature that may be used to identify this species of squid ... . Distinctive echoes that did not occur when other, unsuccessful hauls were undertaken, were the only strong ... single depth zone which reduced the potential number of echoes that might otherwise have been attributed ... to the squid that were caught. File: 15goss-etal.pdf ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 259–271 : Author(s): Goss, C., P. Rodhouse, J.L. Watkins and A.S. Brierley
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Status of the Polish FIBEX acoustic data from the West Atlantic
. Ta6naua 2: O ~ ~ H K H IInOTHOCTH M 6~0~aCCbl KPMXR n0 pe3ynbTaTaM ~ o J I ~ c K o ~ C'be ... B nponaBe Apefi~a (rpynna 1) a nponme 6 p a ~ c @ a n n (rpynna 2), rDe saaqew~e MVBS npeBbIruaeT -87,5 n6 ... acoustic target strength estimates of krill (SC-CAMLR, 1991a). This analysis indicated that the acoustic ... indicated that spatial variability was important and that parts of the shelf to the north of the South ... variation which has previously been reported for the area and shown to be important. File: 10trathan ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 125–132 : Author(s): Trathan, P.N., J. Kalinowski and I. Everson
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Biomass, abundance and distribution of fish in the Kerguelen Islands EEZ (CCAMLR Statistical Division 58.5.1)
of the zone led to it being considered separately (the shallowest depth here is 200 m, therefore ... , the temporal increase in sea-surface temperatures (1992, 1997/98 and 2001/02 El Niño Southern Oscillation ... (Guinet et al., 2001) mostly when its main prey (lanternfish of genera Gymnoscopelus, Electrona ... the Nototheniidae (including annual recruitment) (Duhamel, 1987b; Koubbi et al., 2001) are positive factors ... Division 58.5.1). The swept-area method was used in the depth range from 100 to 1 000 m with 207 random ... distribution of species, commercial or not, that are important in the ecosystem and are of major interest for ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 1–32 : Author(s): Duhamel, G. and M. Hautecoeur
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Myctophids in the diet of Antarctic predators
~. IIpHCYTCTBHe MHKTOCPH~ B paU;HOHe XH~HHKOB - 5IBJIeHHe BeCbMa nepeMeHHoe, XOT51 no 3TOMY Bonpocy e~e He ... Sea with the remaining fish food being mainly Notothenioidei (82.1 %). Myctophids are reported only ... of the fish taken by king penguin is myctophids with K. anderssoni and E. carlsbergi being the principal prey ... composition by sexes was different (Williams, 1991). The diet of females in July/August, 1987 consisted ... , the total number of species may be underestimated because identification of myctophids in predator ... Ocean sector) may be the second most important predator of myctophids. The occurrence of myctophids in ... the diet of predatory species appears to be highly variable though there are insufficient data to ... evaluate this. It is obvious that myctophids are widespread in diets of many Antarctic predators. More ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 335–368 : Author(s): Sabourenkov, E.
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Mitigation of seabird captures during hauling in CCAMLR longline fisheries
to seabirds landing adjacent to the line as it is being hauled, and secondly that seabirds are deterred from ... to seabirds landing adjacent to the line as it is being hauled, and secondly that seabirds are deterred from ... , firstly that they provide a deterrent to seabirds landing adjacent to the line as it is being hauled ... of mitigation measures to reduce the risk to seabirds of being hooked, and consequently drowned, dur- ing line ... of seabirds being caught, but usually not killed, during the line haul- ing. Although many of the seabirds ... seabirds from the point where the line came to the surface prior to being brought onto the vessel ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 155–162 : Author(s): Reid, E., B. Sullivan and J. Clark
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Can we satisfactorily estimate variation in krill abundance?
to year variation in krill abundance it is important that this be quantified and separated from ... of abundance. It is less satisfactory for pelagic fisheries. Evidence is given that CPUE estimated ... ) does not provide a realistic index of krill abundance. Recognising that there is a large natural year ... variation in hill abundance it is important that this be quantified and separated from fishery induced ... abundance. It is less satisfactory for pelagic fisheries. Evidence is given that CPUE estimated from data ... provide a realistic index of krill abundance. Recognising that there is a large natural year to year ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 375-376 : Author(s): Everson, I.
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A composite recruitment index to describe interannual changes in the population structure of Antarctic krill at South Georgia
rona npoBeAeHazr peiica ( ~ . e . n o n y ~ e ~ ~ b ~ i i B p e k e 1997198 r. KpMnb 1 + BbIBenCX ... target or station net hauls is described. This composite index is compared with an index where density ... net hauls. Therefore, when the number of station net hauls is limited, bias is likely to be reduced if ... target net haul data can be included by using the composite recruitment index. This index is used to ... %), while between 1994 and 1998 the number of 1+ krill found in the population increased with a very ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 71–84 : Author(s): Watkins, J.L
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Notes on the use of virtual population analysis for stock assessment of the mackerel icefish, Champsocephalus gunnari (Lönnberg, 1906) in Subarea 48.3 for the 1990/91 and 1991/92 seasons
06bSlcHSleTcSI HenpaBHJIbHbIM npe~nOJIo)J{eHMeM 0 nocToSlHHOH BeJIM4MHe ~ M npOTMBope4MSlMM B BBO~HbIX ~aHHbIx ... . Ha OCHOBaHMM pe3YJIbTaTOB CbeMOK cy~Ha Falklands Protector, npoBe~eHHbIx B 1990/91 H 1991/92 rr ... dimensions. For the month of the start of the survey t (July = month 1, August = month 2 etc.), and known ... as 1 year olds in 1987/88. The relative strength of the year class varies between runs, being particularly ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 49–79 : Author(s): Parkes, G.
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A simple approach for calculating the potential yield of krill from biomass survey results
for the calculations is that the probability that the krill spawning biomass drops below 20% of its ... relative values of the ages at maturity and first-capture. Seasonal effects seem to be of lesser importance ... suggested that a possible approach to the determination of appropriate yields might be to use the formula ... model for the length of kriU of age (a+t) years may be written: 208 { .e .. [ 1-e -(3(a+ot)] .e ... . The reason is that, in practice, such a strategy could only be implemented in the form of fixed ... the likelihood that further surveys will take place, and that their results could also be ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 207–217 : Author(s): Butterworth, D.S., A.E. Punt and M. Basson