In situ TS measurement of capelin (Mallotus villosus villosus) in the Barents Seaat 38 kHz ...

• Main Authors: Ermolchev, Viacheslav A., Sergeeva, Tatjana M.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: ASC 2005 - U - Theme session 2024
• Subjects: Technologies and data; Ecosystem observation, processes and dynamics; Barents Sea; Fridtjof Nansen
• Online Access: https://dx.doi.org/10.17895/ices.pub.25350628; https://ices-library.figshare.com/articles/conference_contribution/In_situ_TS_measurement_of_capelin_Mallotus_villosus_villosus_in_the_Barents_Seaat_38_kHz/25350628

No abstracts are to be cited without prior reference to the author.Now the acoustic target strength relationship TS = 19.1 log(TL) – 74.0 is used in trawl-acoustic surveys (TAS) on assessment of capelin (Mallotus villosus villosus) stock. In this report we present results of in situ TS measurement of capelin for different length TL at the frequency of 38 kHz obtained by PINRO in the Barents Sea in 2000 -2004 during trawl-acoustic survey (TAS) of capelin stocks. The research vessels we have used, R.V. 'Persey–3', 'AtlantNIRO', 'Smolensk' and 'Fridtjof Nansen' are equipped with SIMRAD EK500 and EK60 scientific echo sounders with the split-beam transducer for directly measuring fish target strength. The echo sounders are connected to an IBM PC with the specially developed software packages LTSD100 (Length and Target Strength Distributions) and FAMAS (Fisheries Acoustic Monitoring & Analysis System) to collect and process results of measuring fish target strength. Simultaneous check hauls of the studied fish ...