Search results
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Towards the development of a management plan for mackerel icefish (Champsocephalus gunnari) in Subarea 48.3
, would preclude the fishery039;s ever opening. Several possible modifications to the decision rules ... (Champsocephalus gunnari) B paf io~e ~ X H O ~ re0prHll YCnOXHIIeTCR BePORTHOCTblo CYqeCTBeHHbIX IlePHOAHYeCKAX ... M ~ A H ~ H Q H ~ o B ~ H H X t i ~ a o p ~ a q ~ ~ , n o n y ~ e ~ ~ o f i B p e 3 y n b ~ a ~ e KoMMepyecKoro npoMbIcna H H ~ Y Y H O - HCCJIeAOBaTeJlbCKHX C'beMOK. B COOTBeTCTBHH C 3 T H M MeTOAOM ... in the interim while the feedback approach is being developed, a process that is expected to take several years ... , and increased predation by fur seals and other predators, the effects of these two events being additive ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 63–77 : Author(s): Agnew, D.J., I. Everson, G.P. Kirkwood and G.B. Parkes
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The sensitivity of multiple output statistics to input parameters in a krill–predator–fishery ecosystem dynamics model
by McLeod and Leslie (2009): ecosystem productivity, health, resilience and services. These objectives ... performance (services) and two (health and resilience) for each of 33 SSMU- and taxon- specific predator ... abundance at beginning of fishing period. Krill Whole model Health (II.3(b) maintenance ... was proportional to the biomass of krill, calculated within the model. (iii) Each taxon-specific health ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 97–118 : Author(s): Hill, S.L. and J. Matthews
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Towards an initial operational management procedure for the krill fishery in Subareas 48.1, 48.2 and 48.3
of the previous three years039; CPUE values fall below a target level of 0.75 CPUE ref. An operating model ... ypoBeHb perYJIHpOBaHH.S:I (Hanp. - OpraHHqeHHe BbIJIOBa). ):{JI.S:I paapa60TKH H oT60pa npo~e.llYPbI ... YCTaHaBJIHBaeTC.S:I nopor e:>Ker0.llHbIX ypoBHetf TAC (Cel, npH ~TOM KOHTPOJIbHbIH ypoBeHb CPUE (CPUEref ... ) BbIQHCJI.S:IeTC.S:I KaK Cpe.z:.HSlSI BeJlHqHHa CPUE 3a aTOT nepHO.z:.. IIocJle aTOrO BeJlHlIHHbl TAC MOrYT ... :.a BBe.z:.eHHe aToro YBeJlHqeHHSI MO>KeT 6blTb BpeMeHHo OTJlO>KeHO HJlH ypoBeHb TAC MO>KeT 6blTb CHH>KeH ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 189–219 : Author(s): Butterworth, D.S.
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Using ecosystem monitoring data to detect impacts
. Monitoring programs often focus on the average health or performance of individuals within indi- cator ... for such species (Butterworth and Thomson, 1995; Constable, 2001). The CCAMLR Ecosystem Monitoring Program ... availability of the primary prey species of the monitored predator (Reid and Croxall, 2001; Barlow et al ... (Constable, 2001, 2002), for example by triggering tactical adjustments to catch limits in relatively small ... using monitoring data with no control sites. These methods assess either (i) the expected probability of ... indication from the onset. Furthermore, simulation of all methods suggests that the total probability of ... error (false positives and false negatives combined) is lowest with fixed reference point methods. The ... probabilities of Type I and Type II error can be evaluated analytically for these methods, which facilitates ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 197–212 : Author(s): Hill, S.L., J. Forcada, P.N. Trathan and C.M. Waluda
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An integrated stock assessment for the Patagonian toothfish (Dissostichus eleginoides) for the Heard and McDonald Islands using CASAL
result in the depletion rule being the binding part of the decision rule, rather than the escapement ... , from age 1 to 35 years with the last age class being a plus class. It is a single-area (i.e. single ... were grouped into five groups with the main group, Survey Group 1, comprising surveys from 2001, 2002 ... of their differences in design, timing and type of vessel being used – 1990, 1993, 1999 and 2003 (Survey Groups ... weighting were investigated using haul-level estimated effective sample sizes with, additionally ... data. A key uncertainty is the number of ages fully selected by the main survey series. With all the ... appropriate, since SLOF could not be removed to an acceptable degree. The issues concerning the effect of the ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 1–34 : Author(s): Candy, S.G and A.J. Constable
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Quantifying movement behaviour of vessels in the Antarctic krill fishery
(e.g. krill density), as well as the type of krill being targeted (e.g. gravid, non-green, etc ... CCAMLR fishing seasons was too large to be handled as a single database in the fit of a linear mixed ... (i.e. within fishing grounds). The probabilities of hauls being made within the same locality ... the 2001/02–2002/03 sea- sons (Figure 5b). The latter peak in krill abundance coincided with a year ... operations by Japanese fishing vessels. There were differences between statistical areas with longer ... fishery to assist in interpreting the annual fishing patterns, which can best be collected by scientific ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 131–148 : Author(s): Kawaguchi, S. and S.G. Candy
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Distribution and population structure of Dissostichus eleginoides and D. mawsoni on BANZARE Bank (CCAMLR Division 58.4.3b), Indian Ocean.
. mawsoni on BANZARE Bank is similar to that hypothesised for the Ross Sea population with analogous ... two species by depth may be related to physical intolerance to cooler temperatures because of the lack ... proportion to abundance, suggesting that no substantial recruitment takes place on BANZARE Bank and the ... latitudinal patterns in sexual maturity and size composition. The study indicates that the management of ... number of fish caught per 1 000 hooks for all operations. It should be noted that the different gear ... significantly larger than that of males (97.5–106.3 cm) (two- sample t-test; P < 0.001) for each fishing season ... ) hypoth- esised that the reason D. eleginoides was not found in waters with surface temperatures <2°C was ... demonstrates that species-specific distribution and possible migration need to be con- sidered in the ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 145–153 : Author(s): Taki, K., M. Kiyota, T. Ichii and T. Iwami
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Preliminary analyses of data collected during experimental phases of the 1994/95 and 1995/96 Antarctic crab fishing seasons
2039;s third depletion square. The assumptions of the mark-recapture model were probably violated ... YHCJIeHHOCTM Ha BeCb n o ~ p a f i 0 ~ 48.3 C YYeTOM TOnbKO IIJIOLlJaAH MOPCKOrO AHa ... on data collected from these hauls are provided in Table 1. The vessel initiated Phase 1 on 31 August ... then increased. CPUE was related to mid-depth, with the lowest catch rates being obtained on the shallowest ... and deepest hauls and intermediate to high CPUEs being obtained on hauls made at intermediate depths. Mid ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 141–159 : Author(s): Watters, G
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A comparison between otoliths and scales for use in estimating the age of Dissostichus eleginoides from South Georgia
CCAMLR Scicrzce, Vol. 8 (2001): 75-92 A COMPARISON ... (Ashford, 2001). The blocking factor was individual fish, considered randomly drawn from the wider ... on the otolith from the jth fish. Under the assumptions of the mixed effects model: where p is the general ... , 2001). Additionally, variability increased little wit11 age, so that CV decreased, and the lower mean ... with age. Patagonian toothfish (Dissostichus eleginoides) is considered to be a long-lived species ... sides. Using ANOVA, we compared data obtained from the two structures to test the hypothesis that ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 75–92 : Author(s): Ashford, J.R., S. Wischniowski, C. Jones, S. Bobko and I. Everson
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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)
. The data behind these publica- tions are mainly outside of central databases, being scattered widely ... was actually the exception, being probably per- formed strictly only by C. acutus (Schnack-Schiel and Hagen ... , 1995; Atkinson, 1998; Pasternak and Schnack-Schiel, 2001). A global analysis of copepod diets showed ... - mass dominants (Metz, 1996) and their role in the food web is still being discovered. Oithona similis ... fixed (Q10-type) temperature relationships based on global literature compilations must be applied with ... an enormous amount of data on Southern Ocean (SO) zooplankton, mostly on their distribution with a ... assist SO food-web modellers or those with limited specialist knowledge of SO zooplankton. First, a brief ... overview is provided of the diversity and basic biology of SO zooplankton, with an emphasis on abundance ...
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