Search results
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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
techniques, from 1991 back to 1977. The predicted age structure, dominated in recent years by the 1987 year ... -class (1 year olds in 1988), was quite robust, despite the use of various combinations of survey ... proportion of 5 year olds, which was not observed during the survey on Falklands Protector in January 1992 ... . Breakdown in the credibility of the VPA results in most recent years is attributed to the invalid assumption ... with that observed during the UK stock assessment surveys of the last two years. 2. MATERIALS AND METHODS Two ... --=-Ua Equation 4 assumes equal weighting between the two indices in years when they are both ... for that year. The default is one times the mean of the four younger Fs (i.e., for C. gunnari age ... heavily dominated by the year class recruiting as 1 year olds in 1987/88. Combination of the two indices ...
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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International CCAMLR applied research and monitoring program, Prydz Bay priority area
by Australia towards the first five years of an International CCAMLR Applied Research and Monitoring Program ... five years of an International CCAMLR Applied Research and Monitoring Program in the Prydz Bay area ... ~ ~ MOHMTOPMHfY B PAMOHE ITEPBOCTEITEHHOM B~HOCTM - 3AnMBE ITPID~C Pe3lOMe B 06mHX qepTaX on ... of a proposed scientific research contribution by Australia towards the first five years of an International ... HCbIBaeTCH npeAnOJIaraeMaH HayqHO-HCCJIeAoBaTeJIbCKaH pa60Ta KaK BKJIaA ABCTpaJIHH 3a nepBble nHT b JIeT npoBeAeHHH Me ... Monitoring held in Seattle during May 1985, the Prydz Bay region was one of the areas that was agreed ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 283-295 : Author(s): Australia
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Preliminary analyses of data collected during experimental phases of the 1994/95 and 1995/96 Antarctic crab fishing seasons
at liberty for about one to five weeks. The recaptured crabs had minimum movement rates of 0.08 to 0.25 ... crabs were recovered, and these crabs were at liberty for about one to five weeks. The recaptured crabs ... , and these crabs were at liberty for about one to five weeks. The recaptured crabs had minimum movement rates ... servir a estimer l'abondance des crabes lorsque l'on Ptudie des secteurs plus etendus et que les ... . CO~J I~CHO pe3yJIbTaTaM, IlOJIyYeHHbIM np11 MCnOJlb30BaHkiM 0606LlJeM~bl~ ZlAAMTHBHbIX ... 3 ~ a n a 1 rosopxT o TOM, Y T O 661~10 661 H ~ U ~ J I ~ C O O ~ ~ ~ ~ H ~ I M 3KCTpanOnMpOBaTb JlOKanbHbIe OUeHKH ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 141–159 : Author(s): Watters, G
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Variations in echosounder calibration with temperature, and some possible implications for acoustic surveys of krill biomass
biomass by acoustic techniques is dependent on a number of factors of which one of the most fundamental ... kHz between calibrations conducted at the two locations. At 120 kHz, the required S v transducer gains ... of which one of the most fundamental is accurate echosounder calibration. The Simrad EK500 scientific ... at the two locations. At 120 kHz, the required Sv transducer gains at South Georgia (sea temperature at depth ... one of the most fundamental is accurate echosounder calibration. The Simrad EK500 scientific ... conducted at the two locations. At 120 kHz, the required S, transducer gains at South Georgia (sea ... BHeCeHMR ~3MeHeHPlfi AnR YYeTa MeXperHoHaJIbHbIX pa3nHYHfi B CKOPOCTM 3ByKa. B A ~ H H O ~ ~ pa60Te IIPe ... Esponb~, KOTOpbIe YKa3bIBaIOT Ha TO, YTO pa60Ta lIpe06pa30Ba~enR 3XOJIOTa 3aBMCMT OT TeMIIepaTypbI ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 273–281 : Author(s): Brierley, A.S., C. Goss, J.L. Watkins and P. Woodroffe
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Analysis of trends in Japanese krill fishery CPUE data, and its possible use as a krill abundance index
o f t ot al Residuals P er ce nt o f t ot al 0 5 10 15 20 25 30 -150 -100 -50 0 50 100 150 ... Log10CPT 0 10 20 30 40 -1.5 -1.0 -0.5 0.0 0.5 1.0 -4 -2 0 2 4 -1.5 -1.0 -0.5 0.0 0.5 1.0 ... P er ce nt o f t ot al Quantiles of standard normal Residuals Log10CPD 0 10 20 30 40 ... 5000 6000 7000 5000 10000 15000 20000 25000 0 D J F M A M J J A S O N 0 10 20 30 40 50 ... 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 ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 1–28 : Author(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?
autoline vessels and one Spanish-system vessel operate in these fisheries (SC-CAMLR, 2006 ... of the longline to account for biases that may have existed due to setting order. The join between the two ... amounted to about 100 s of setting time (at 6 knots 3.1 m s–1), was chosen to ensure the sink rate of one ... every second. The TDRs were attached to the longline on 30 cm long snoods made from 9 mm rope ... the sink rates of IW longlines. Time-depth recorders were deployed on lines set with and without a ... depth of longlines for given distances astern. This increase in depth is minor and unlikely to result in ...
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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Distribution of mackerel icefish (Champsocephalus gunnari) (Channichthyidae) around South Georgia at various stages of its life cycle
and one year old. The ecological niche occupied by young fi sh is distinctly different from ... (Efremenko, 1979, 1983; Kock, 1981, 1989; North, 1987). Young fi sh older than one year inhabit pelagic ... migrate to the Shag Rocks area most probably die after reaching two years of age. The abovementioned ... (Kock, 1981; Lisovenko, 1982). It was found that there are more than one, i.e. at least two, main ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 49–69 : Author(s): Frolkina, Zh.A
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The use of patent databases to predict trends in the krill fishery
20 08 Year Nu m be r o f P at en ts Food Medical Year N um be r o f p at en ts 30 25 ... by most patent active countries, in year groups. 0 10 20 30 40 50 60 70 1976-1986 1987-1998 1999 ... of, the patented tech- nology for 20 years (IP Australia, 2010); similar provisions apply in other countries ... patents) patents lodged in each of the two previous 10-year periods. There has been a notable increase ... / Description: The fishery for Antarctic krill (Euphausia superba) caught 210 000 tonnes in 2009/10 with ... 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 ... Secretariat so that it can annually update a register of krill-related patents which will be of use for ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 135–144 : Author(s): Foster, J., S. Nicol and S. Kawaguchi
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A review of data on abundance, trends in abundance, habitat use and diet of ice-breeding seals in the Southern Ocean (submitted to the 2008 Joint CCAMLR-IWC Workshop)
possible to sample all areas of the Antarctic pack-ice in one year, but the resulting spatial coverage ... of ice-breeding seals 331 000 (144 000–759 000); 90°W–30°W sector: no estimate for Ross seals, only one ... of two Commissions responsible for managing biota in the Southern Ocean (i.e. the Commission ... , and moulting in mid- to late summer. For the rest of the year, these species spend much of their time ... important first steps for improving ecosystem models. This review focuses on seals that breed in ice ... Paper Title: A review of data on abundance, trends in abundance, habitat use and diet of ice ... ; leopard seal, Hydrurga leptonyx; and Weddell seal, Leptonychotes weddellii). Data on populations ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 49–74 : Author(s): Southwell, C., J. Bengtson, M. Bester, A.S. Blix, H. Bornemann, P. Boveng and M. Cameron, J. Forcada, J. Laake, E. Nordøy, J. Plötz, T. Rogers, D. Southwell, D. Steinhage, B.S. Stewart and P. Trathan
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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)
to be considered when evaluating patterns that have emerged in Southern Ocean ecosystems in the course of the 20 ... emerged in Southern Ocean ecosystems in the course of the 20th century. As a first step towards ... span of typically 10–20 years (Kock et al., 1985; La Mesa et al., 2000) with the exception of the two ... and the large baleen whales in the first 80 years of the 20th century (the so called ‘krill surplus hypothesis ... for the split-years (1 July to 30 June) 1975/76 and 1977/78 (Table 5). Biomass estimates of C. gunnari were ... estimates of C. gunnari existed for 1975/76, one year before large-scale exploitation of the species ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 115–169 : Author(s): Kock, K.-H., E. Barrera-Oro, M. Belchier, M.A. Collins, G. Duhamel, S. Hanchet, L. Pshenichnov, D. Welsford and R. Williams