Résultats de la recherche
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Midwater trawl catchability as an aspect of a quantitative assessment of krill biomass conducted using a trawl census survey
Paper Title: Midwater trawl catchability as an aspect of a quantitative assessment of krill ... catchability and krill distribution patterns. A comparative analysis of trawl catchability for commercial ... high relative error. A standard method for conducting krill trawl census surveys needs to be developed ... total amount of krill entering the trawl should be carried out when selecting trawl construction. File ... WG-KRILL-91/32 MIDWATER TRAWL CATCHABILITY AS AN ASPECT ... OF A QUANTIT ATIVE ASSESSMENT OF KRILL BIOMASS CONDUCTED USING A TRAWL CENSUS SURVEY S.M ... will improve with better knowledge of trawl catch ability and krill distribution patterns. A ... for conducting krill trawl census surveys needs to be developed. Mathematical modelling fishing ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 257–272 : Auteur(s): Kasatkina, S.M.
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A simple approach for calculating the potential yield of krill from biomass survey results
Paper Title: A simple approach for calculating the potential yield of krill from biomass survey ... MB 0 for a krill fishery in which both the fishery and krill growth are seasonal. The criterion used ... for the calculations is that the probability that the krill spawning biomass drops below 20% of its ... WG-KRILL-91/24 A SIMPLE APPROACH FOR CALCULATING THE ... POTENTIAL YIELD OF KRILL FROM BIOMASS SURVEY RESULTS D.S. Butterworth* , A.B. Punt* and M. Basson ... fishery in which both the fishery and krill growth are seasonal. The criterion used for the calculations ... is that the probability that the krill spawning biomass drops below 20% of its median pre ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 207–217 : Auteur(s): Butterworth, D.S., A.E. Punt and M. Basson
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Surface water circulation in krill fishing areas near the South Shetland Islands
Paper Title: Surface water circulation in krill fishing areas near the South Shetland Islands ... with a drogue attached at a depth of 30 m to assess flow patterns at the depth range where krill tended ... distribution of krill catches taken in the area by Japanese vessels during the period from 1981 to 1994. It is ... which contribute to the formation of stable krill concentrations in the area. The observed long-distance ... para evaluar la configuraci6n del flujo en el estrato de profundidad donde la abundancia de kril fue ... distribuci6n de las capturas de kril realizadas por barcos japoneses en el area durante el period0 de 1981 a ... islas puede tener propiedades que contribuyen a la formaci6n de concentraciones estables de kril en la ... corrientes oceknicas pueden transportar kril desde las islas Shetland del Sus a las islas Georgia del Sur y ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 125–136 : Auteur(s): Ichii, T. and M. Naganobu
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Estimation of krill (Euphausia superba) mortality and production rate in the Antarctic Peninsula region
Paper Title: Estimation of krill (Euphausia superba) mortality and production rate in the ... Antarctic Peninsula region Abstract / Description: A net sampling survey for krill was carried out by RV ... reached only a factor of 1:1.6. Krill mortality was calculated by linearized catch curve analysis and ... ratio of 0.88 to 0.94 for different years. The exchange rate of water masses and krill biomass within ... WG-KRILL-91/15 ESTIMATION OF KRILL (EUPHAUSIA SUPERBA ... survey for krill was carried out by RV Meteor along the Antarctic Peninsula from 26 December 1989 to 14 ... interannual variability between available surveys reached only a factor of 1:1.6. Krill mortality was ... exchange rate of water masses and krill biomass within one summer season was roughly estimated as two ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 159–176 : Auteur(s): Siegel, V.
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Towards an initial operational management procedure for the krill fishery in Subareas 48.1, 48.2 and 48.3
Paper Title: Towards an initial operational management procedure for the krill fishery in ... Subareas 48.1, 48.2 and 48.3 Abstract / Description: An operational management procedure for krill ... on the Krill CPUE Simulation Study. Annual TACs are restricted to an initial ceiling (C c) for a five ... 0.75 CPUE ref. An operating model of krill dynamics in the region is developed for simulation testing ... MANAGEMENT PROCEDURE FOR THE KRILL FISHERY IN SUB AREAS 48.1, 48.2 AND 48.3 D.S. Butterworth ... * * Abstract An operational management procedure for krill (Euphausia superba) in Subareas 48.1, 48.2 and ... provided by the CPUE "Composite Index" proposed by the Workshop on the Krill CPUE Simulation Study ... of krill dynamics in the region is developed for simulation testing purposes. A provisional ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 189–219 : Auteur(s): Butterworth, D.S.
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A post-processing method to remove interference noise from acoustic data collected from Antarctic krill fishing vessels
from Antarctic krill fishing vessels Abstract / Description: The use of fishing-vessel-based acoustic ... Antarctic krill (Euphausia superba), yet the quality and even the utility of the data may be seriously ... Chinese krill fishing vessel. Results show that the interference noise was effectively reduced while ... structure and echo strength of the krill swarms were retained. The method may provide opportunity to improve ... data collected from Antarctic krill fishing vessels X. Wang Ocean University of China Qingdao ... distribution and relative abundance of Antarctic krill (Euphausia superba), yet the quality and even the ... data at 38, 70 and 120 kHz collected from a Chinese krill fishing vessel. Results show that the ... interference noise was effectively reduced while structure and echo strength of the krill swarms were retained ...
Science Journal Paper : CCAMLR Science, Volume 23 (CCAMLR Science, Volume 23) : 17–30 : Auteur(s): Wang, X., J. Zhang and X. Zhao
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A quantified Bayesian Maximum Entropy estimate of Antarctic krill abundance across the Scotia Sea and in small-scale management units from the CCAMLR-2000 Survey
Paper Title: A quantified Bayesian Maximum Entropy estimate of Antarctic krill abundance across ... Antarctic krill (Euphausia superba) across the Scotia Sea using data from the CCAMLR 2000 Krill Synoptic ... Survey of Area 48 (CCAMLR-2000 Survey) and to map the density distribution of krill across the survey ... reconstruction of krill distribution, given the data. The Bayesian framework also allows intrinsic calculation of ... entropía (MaxEnt) para estimar la abundancia de kril antártico (Euphausia superba) en el Mar de Escocia a ... partir de los datos de la prospección sinóptica de kril CCAMLR 2000 realizada en el Área 48, y para ... graficar la distribución de las densidades de kril en el área de prospección. Los valores de la densidad ... probable de la distribución de kril, dados los datos de los cuales se dispone. Asimismo, el análisis ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 97–116 : Auteur(s): Heywood, B.G., A.S. Brierley and S.F. Gull
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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 ... 1989/90 Abstract / Description: A krill biomass census survey was carried out at two fishing grounds ... speed was 3.2 to 3.6 knots. The total krill stock on the poorly studied site off the South Sandwich ... both research and commercial harvesting. The overall krill stock here was estimated to be 1.1 million ... WG-KRILL-90/21 KRILL BIOMASS ASSESSMENT IN STATISTICAL ... AREA 48 FROM THE RV ATLANTNIRO DATA - AUTUMN 1989/90 A.C. Fedotov* * Abstract A krill biomass ... m layer using a modified Isaacs-Kidd trawl. Trawling speed was 3.2 to 3.6 knots. The total krill ... . The overall krill stock here was estimated to be 1.1 million tonnes. Most of this stock was ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 115–121 : Auteur(s): Fedotov, A.C.
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Environment–krill relations in the South Georgia marine ecosystem
Paper Title: Environment–krill relations in the South Georgia marine ecosystem Abstract ... study, time series of krill abundance (CPUE) indices were derived from Soviet fishing operations in the ... agrees with other data which give direct or indirect indications of krill availability, suggesting it can ... more consistent, supporting suggestions that the variability in krill abundance around South Georgia is ... . Las series cronologicas de datos sobre la abundancia de kril (CPUE) utilizadas en este estudio fueron ... concuerda con otros datos que dan una indication directa o indirecta de la disponibilidad de kril, por 10 ... suposiciones de que la variabilidad en la abundancia de kril alrededor de Georgia del Sur est6 fuertemente ... CCAMLR Science, Vol. 3 (1996): 13-30 ENVIRONMENT-KRILL ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 13–30 : Auteur(s): Fedoulov, P.P., E. Murphy and K.E. Shulgovsky
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Brief comments on the simulation study made by Professor Butterworth on krill fishing by an individual Japanese trawler
Paper Title: Brief comments on the simulation study made by Professor Butterworth on krill ... questions are raised concerning the simulation study of the Japanese krill fishery carried out by ... Butterworth (1988). Firstly, the simulation study used krill distribution parameter values based on the FIBEX ... our knowledge of krill distribution is necessary before the routine implementation of searching time ... MADE BY PROF. BUTTERWORTH ON KRILL FISHING BY AN INDIVIDUAL JAPANESE TRAWLER T. Ichii and Y. Endo ... Japanese krill fishery carried out by Butterworth (1988). Firstly, the simulation study used krill ... elapsed time. It is suggested that an improvement in our knowledge of krill distribution is necessary ... japonaise de krill effectuee par Butterworth (1988). Tout d'abord, I'etude par simulation utilise les ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 347–350 : Auteur(s): Ichii, T. and Y. Endo