Resultados de la búsqueda
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Fishing ground selection in the Antarctic krill fishery: trends in patterns across years, seasons and nations
Paper Title: Fishing ground selection in the Antarctic krill fishery: trends in patterns across ... characterised using STATLANT and CCAMLR fine-scale data. Among the 15 small-scale management units (SSMUs ... ) within Subareas 48.1, 48.2 and 48.3, including the pelagic SSMUs, only one-third were identified as major ... contributors to the total catch. A recent shift in operational timing towards later months within fishing ... negligible catch in 1999). Except for 1988, almost no catches were reported from the pelagic area in ... mainly during summer to autumn. Almost no catch was made from Subarea 48.1 except in autumn 1990. The ... fishery in Area 48 could be divided into two sub-periods. The first period is 1980–1989, when no fishing ... -free dur- ing winter with no fishing operations. Also, if the fishing operations of individual nations ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 117–141 : Autor(es): Kawaguchi, S., S. Nicol, K. Taki and M. Naganobu
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An assessment of the mackerel icefish (Champsocephalus gunnari) off Heard Island
Paper Title: An assessment of the mackerel icefish (Champsocephalus gunnari) off Heard Island ... Abstract / Description: Assessments of the abundance and potential yield of the mackerel icefish ... (Champsocephalus gunnari) populations at Heard Island are developed from the results of four scientific surveys ... conducted in 1990, 1992, 1993 and 1997. The assessments include estimates of all the parameters required ... Heard Island. Figure 2 shows no apparent relationship between the numbers of recruits on the plateau ... though virtually no pre-spawning 2-year-old fish were taken with this gear in 1997, the proportion of ... of 'small fish' was difficult. The general yield assessments below show that there is no ... is to calculate the fishing mortality which would result in a probability of no more than 0.05 that ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 79–101 : Autor(es): de la Mare, W.K., R. Williams and A.J. Constable
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Towards the development of a management plan for mackerel icefish (Champsocephalus gunnari) in Subarea 48.3
Paper Title: Towards the development of a management plan for mackerel icefish (Champsocephalus ... gunnari) in Subarea 48.3 Abstract / Description: Management of the mackerel icefish (Champsocephalus ... gunnari) at South Georgia is complicated by the likelihood of substantial periodic variations in natural ... outlines a scheme which would use information from studies on krill and predators undertaken as part of the ... years 1978 and 1984 there are no survey estimates from which one could derive estimates of M, but the ... , there also appears to be a decline the previous year. There is no indication of a major decline in ... situation where even under conditions of no exploitation the population often drops to less than 20% of ... CCAMLR Science, Vol. 5 (1998): 63-77 TOWARDS THE ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 63–77 : Autor(es): Agnew, D.J., I. Everson, G.P. Kirkwood and G.B. Parkes
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A stock assessment model of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea Region incorporating multi-year mark-recapture data
since the late 1990s. No fishery-independent methods of monitoring stock abundance were plausible, and ... demonstrates the value of multi-year mark-recapture programs to estimate fish stocks even where no fishery ... Paper Title: A stock assessment model of Antarctic toothfish (Dissostichus mawsoni) in the Ross ... longline fishery for Antarctic toothfish (Dissostichus mawsoni) has been carried out in the Ross Sea region ... parameters used in the model are summarised in Table 1. observations Data quality In 2013, there were no ... RSR. For example, there were no fishery-independent surveys of the fished stock, as opposed to other ... residuals. MCMC results Trace plots showed no evidence of poor convergence in the key biomass parameters ... was tested, as a proxy for assum- ing that no cryptic biomass was allowed in the model. It was only ...
Science Journal Paper : CCAMLR Science, Volume 21 (CCAMLR Science, Volume 21) : 39–62 : Autor(es): Mormede, S., A. Dunn and S.M. Hanchet
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Long-term monitoring of krill recruitment and abundance indices in the Elephant Island area (Antarctic Peninsula)
Paper Title: Long-term monitoring of krill recruitment and abundance indices in the Elephant ... for the Elephant Island area with regard to the representativeness of the study area (60°-62 o 30´S ... were re-calculated applying the delta distribution approach introduced by de la Mare (1994a). The high ... interannual variability of krill recruitment is confirmed by the present analysis. Results are compared for ... certainly no problem for postlarval krill. (iii) Estimating the proportions of the distribution mixture ... the statistical package S-Plus. The null hypothesis that there is no difference between years is ... assumption that there has been no persistent change in krill density should be tempered with the caution ... MONITORING OF KRILL RECRUITMENT AND ABUNDANCE INDICES IN THE ELEPHANT ISLAND AREA (ANTARCTIC PENINSULA) V ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 19–35 : Autor(es): Siegel, V., W. de la Mare and V. Loeb
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Measurements of differences in the target strength of Antarctic krill (Euphausia superba) swarms at 38 kHz and 120 kHz
Paper Title: Measurements of differences in the target strength of Antarctic krill (Euphausia ... superba) swarms at 38 kHz and 120 kHz Abstract / Description: Differences in the target strength of adult ... differences in the mean back-scattering strength of swarms simultaneously insonified at these two frequencies ... in studies off the South Orkneys and Elephant Island in March 1990. Back-scattering strengths at 120 ... 100 m over an interval in which no krill were evident on either sounder in the upper 100 m, to check ... as a source of error. Similarly, there was no noticeable difference in L\ MSBS when the frequencies ... WG-KRILL-90/28 MEASUREMENTS OF DIFFERENCES IN THE ... * * Abstract Differences in the target strength of adult (36 to 60 mm) Antarctic krill (Euphausia superba ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 75–86 : Autor(es): Hampton, I.
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An updated descriptive analysis of the toothfish (Dissostichus spp.) tagging program in Subareas 88.1 and 88.2 for 2006/07
Abstract: The descriptive analyses of the toothfish tagging programme carried out in Subareas ... 88.1 and 88.2 since 2001 are updated, including data for the 2007 season for all vessels. This paper ... provides an update of the preliminary tag-release and tag-recapture data that were presented at the July ... , and 911 Patagonian toothfish released and 43 recaptured since 2001. The number of tags recaptured in ...
Meeting Document : WG-FSA-07/40 : Autor(es): A. Dunn, S.M. Hanchet and S.L. Ballara (New Zealand)
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Whales: Trophic modelling of the Ross Sea
Description / Abstract: A supporting document to the CCAMLR Science paper: M.H. Pinkerton, J.M ... . Bradford-Grieve and S.M. Hanchet. 2010. A balanced model of the food web of the Ross Sea, Antarctica ... population is assumed to be in steady state, as no long-term trends in orca populations in the Ross Sea are ... & Joyce (1995) state that, with no correction for sighting efficiency (the probability of sighting an ... the Ross Sea. Not much is known of the biology of this species, and there are no estimates of ... rather than black. The white colour is often tinged yellow, probably due to a diatom film. The eyepatch ...
Document : Site Section: Publications
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On the problem of by-catch of juvenile fish in krill fishery
conducted during 1985-1988 in the Kosmonavtov and Sodruzhestva seas (Antarctic Indian Ocean sector). Isaacs ... -Kidd trawl with an opening area of 6.0 m2 was used. Trawls were taken in the 0-200 m surface layer over ... the bottom depth range from 100 to 5000 m. In 1988, studies included catches taken by a commercial ... krill trawl with an opening area in a small meshed section of the trawl beg of 100 m2. Catches were ...
Meeting Document : WG-FSA-92/10 : Autor(es): C.A. Pankratov and E.A. Pakhomov (Ukraine)
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Preliminary proposal for designation an Antarctic Specially Protected Area in the Argentine Islands Archipelago and nearby Graham Coast Antarctic Peninsula region
the Argentine Islands Archipelago as well as CEMP sites managed by Ukraine. Since 2003 Ukraine has ... Abstract: Ukraine is planned to establish the Antarctic Specially Protected Area (ASPA) at the ... region of Argentine Islands Archipelago, adjacent islands of the Wilhelm Archipelago and costal oases of ... nearby Graham Coast Antarctic Peninsula (short abbreviation – AIGC ASPA). This ASPA will include the ...
Meeting Document : SC-CAMLR-38/BG/21 Rev. 1 : Autor(es): Delegation of Ukraine