Resultados de la búsqueda
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Information on the status of fjord Notothenia rossii, Gobionotothen gibberifrons and Notothenia coriiceps in the lower South Shetland Islands, derived from the 2000–2006 monitoring program at Potter Cove
Notothenia coriiceps in the lower South Shetland Islands, derived from the 2000–2006 monitoring program at ... sampling period of 24 years which began in 1983, and at Harmony Cove in the summers of 2001to 2003. The ... decline in trammel net catches of fjord Notothenia rossii and Gobionotothen gibberifrons in relation to ... increasing trend of N. rossii catches from 1991 to 2006, the actual levels are half of those found in the ... GIBBERIFRONS AND NOTOTHENIA CORIICEPS IN THE LOWER SOUTH SHETLAND ISLANDS, DERIVED FROM THE 2000–2006 ... of 24 years which began in 1983, and at Harmony Cove in the summers of 2001 to 2003. The decline in ... trammel net catches of fjord Notothenia rossii and Gobionotothen gibberifrons in relation to the non ... trend of N. rossii catches from 1991 to 2006, the actual levels are half of those found in the early ...
Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 83–87 : Autor(es): Barrera-Oro, E.R. and E.R. Marschoff
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Statistical power to detect changes in growth rates of Antarctic fur seal pups
Paper Title: Statistical power to detect changes in growth rates of Antarctic fur seal pups ... changes (between years) in pup growth rates, the loss of power associated with obtaining weight samples on ... only three dates in a season, and potential means of increasing the power of the CCAMLR Ecosystem ... Monitoring Program Standard Method C1 (B). Using estimates of variance in pup weights obtained at Seal Island ... IN GROWTH RATES OF ANTARCTIC FUR SEAL PUPS P. Boveng, J. L. Bengtson and M. E. Goebel Abstract ... ) in pup growth rates, the loss of power associated with obtaining weight samples on only three dates ... in a season, and potential means of increasing the power of the CCAMLR Ecosystem Monitoring Program ... Standard Method C1 (B). Using estimates of variance in pup weights obtained at Seal Island (60 0 59.5'S ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 399–409 : Autor(es): Boveng, P., J.L. Bengtson and M.E. Goebel
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A study of Patagonian toothfish (Dissostichus eleginoides) post-tagging survivorship in Subarea 48.3
in Subarea 48.3 Abstract / Description: During the 2005 fishing season, experiments on the ... survivorship of toothfish following tagging were carried out on eight different vessels fishing in Subarea 48.3 ... . Toothfish were kept in tanks with seawater replacement for at least 12 hours after tagging. On one vessel ... , fish with a variety of injuries were selected to see if this affected recovery. In the final analysis ... study of PAtAgoniAn toothfish (Dissostichus eleginoiDes) Post-tAgging survivorshiP in subAreA 48.3 ... carried out on eight different vessels fishing in Subarea 48.3. Toothfish were kept in tanks with ... were selected to see if this affected recovery. In the final analysis, 396 animals were included, with ... an overall survivorship of 90%. Smaller animals and animals in better initial condition had a higher ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 279–289 : Autor(es): Agnew, D.J., J. Moir Clark, P.A. McCarthy, M. Unwin, M. Ward, L. Jones, G. Breedt, S. Du Plessis, J. Van Heerdon and G. Moreno
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Bias in the estimation of krill yield from using a deterministic formulation of the median unexploited spawning biomass
Paper Title: Bias in the estimation of krill yield from using a deterministic formulation of the ... unexploited spawning biomass. These models are used in order to account for uncertainty in the biological ... model as a basis for setting catch limits in the krill fishery, while the GYM is used for assessing ... yield in other finfish fisheries but can also be used for krill. The decision rules relate to the ... CCAMLR Science, Vol. 5 (1998): 1-8 BIAS IN THE ... . These models are used in order to account for uncertainty in the biological parameters and abundance of ... setting catch limits in the krill fishery, while the GYM is used for assessing yield in other finfish ... projection so that in each trial a direct assessment can be made of (i) whether the stock became critically ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 1–8 : Autor(es): Constable, A.J. and W.K. de la Mare
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Variations in echosounder calibration with temperature, and some possible implications for acoustic surveys of krill biomass
Paper Title: Variations in echosounder calibration with temperature, and some possible ... stability in system gain settings. Between Antarctic seasons this echosounder has also been calibrated in ... those applied in the Antarctic, even after adjustments have been made to account for differences in ... significant differences in volume backscattering (S v) and target strength (TS) transducer gains were detected ... VARIATIONS IN ECHOSOUNDER CALIBRATION WITH TEMPERATURE, AND SOME POSSIBLE IMPLICATIONS FOR ACOUSTIC SURVEYS ... after krill surveys there, and exhibits temporal stability in system gain settings. Between Antarctic ... seasons this echosounder has also been calibrated in temperate European waters. Under these warmer ... conditions, calibrated gain settings differ markedly from those applied in the Antarctic, even after ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 273–281 : Autor(es): Brierley, A.S., C. Goss, J.L. Watkins and P. Woodroffe
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Krill biomass assessment in Statistical Area 48 from the RV AtlantNIRO data - Autumn 1989/90
Paper Title: Krill biomass assessment in Statistical Area 48 from the RV AtlantNIRO data- Autumn ... in the South Sandwich and South Orkney Islands areas during a cruise by RV AtlantNIRO in March/April ... 1990. The survey was conducted in the upper 100 m layer using a modified Isaacs-Kidd trawl. Trawling ... Islands was assessed at 3.8 million tonnes, most of which was concentrated in the waters of the Weddell ... WG-KRILL-90/21 KRILL BIOMASS ASSESSMENT IN STATISTICAL ... census survey was carried out at two fishing grounds in the South Sandwich and South Orkney Islands ... areas during a cruise by RV AtlantNIRO in March/April 1990. The survey was conducted in the upper 100 ... , most of which was concentrated in the waters of the Weddell Sea. In contrast to this site, the one ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 115–121 : Autor(es): Fedotov, A.C.
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Statistical problems in krill stock hydroacoustic assessments
Paper Title: Statistical problems in krill stock hydroacoustic assessments Abstract / Description ... applied to establish biomass in a survey area and the second is the improvement in accuracy of target ... -strength measurements. In the case of statistical methods, there are no clear guidelines for deciding what ... the population is fixed in space, relative to the sampling interval. There remain several unsatisfied ... SC-CAMLR-VII/BG/22 STATISTICAL PROBLEMS IN KRILL STOCK ... assessments of krill. The first is the methods applied to establish biomass in a survey area and the second ... is the improvement in accuracy of target-strength measurements. In the case of statistical methods ... difficult by the fact that most survey methods assume the population is fixed in space, relative to the ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 301–309 : Autor(es): Macaulay, M.C.
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On the presence of Paralomis spinosissima and Paralomis formosa in catches taken during the Spanish survey Antártida 8611
Paper Title: On the presence of Paralomis spinosissima and Paralomis formosa in catches taken ... the archipelagos in the Scotia Sea. A total of 345 hauls was conducted, of which 29 took place around ... m. In the whole of the area surveyed, the two crab species of the genus Paralomis (P. spinosissima ... and P. formosa) were found only around Shag Rocks and South Georgia. P. spinosissima was caught in ... PARALOMIS SPINOSISSIMA AND PARALOMIS FORMOSA IN CATCHES TAKEN DURING THE SPANISH SURVEY A N T A R T ' A ... shelf around all the archipelagos in the Scotia Sea. A total of 345 hauls was conducted, of which 29 ... from 63 m down to 643 m. In the whole of the area surveyed, the two crab species of the genus ... . spinosissima was caught in seven hauls of the 29 made around Shag Rocks and in 20 of the 104 hauls made at ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 165–173 : Autor(es): López Abellán, L.J. and E. Balguerías
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Protecting young fish and spawning aggregations of Champsocephalus gunnari in Subarea 48.3 (South Georgia): a review
Paper Title: Protecting young fish and spawning aggregations of Champsocephalus gunnari in ... spawning aggregations in fisheries generally, and specifically in the Champsocephalus gunnari fishery in ... measures put in place by CCAMLR to date. These measures are re-examined in the light of new information ... , and a strategy for the future protection of young fish and spawning aggregations of C. gunnari in ... FISH AND SPAWNING AGGREGATIONS OF CILAMPSOCEPHALUS G U W A R I IN SUBAREA 48.3 (SOUTH GEORGIA): A ... The need to protect young fish and spawning aggregations in fisheries generally, and specifically in ... the Chaiizpsocephalus guiznari fishery in Subarea 48.3, is reviewed. Mechanisms available to achieve ... these objectives are discussed, including the measures put in place by CCAMLR to date. These measures ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 75–86 : Autor(es): Parkes, G.B
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Catch per unit effort and proportional recruitment indices from Japanese krill fishery data in Subarea 48.1
fishery data in Subarea 48.1 Abstract / Description: Proportional recruitment indices and CPUE in Subarea ... . CPUE (catch/towing volume) in the Livingston Island area showed a decreasing trend during the study ... period. The use of different fishing strategies in response to a demand for higher product quality and a ... general decrease in krill density in the study area were considered as possible reasons for this. On the ... EFFORT AND PROPORTIONAL RECRUITMENT INDICES FROM JAPANESE KRILL FISHERY DATA IN SUBAREA 48.1 S ... , Shimizu-shi Shizuoka 424, Japan Abstract Proportional recruitment indices and CPUE in Subarea 48.1 ... . CPUE (catch/towing volume) in the Livingston Island area showed a decreasing trend during the study ... period. The use of different fishing strategies in response to a demand for higher product quality and a ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 47–63 : Autor(es): Kawaguchi, S., T. Ichii and M. Naganobu