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An evaluation of horizontal echo sounding as a method for behavioural studies of 0+ fish in field experiments
Author(s) -
Romare P.
Publication year - 2001
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.2001.tb02308.x
Subject(s) - rutilus , echo sounding , biology , echo (communications protocol) , fish <actinopterygii> , field (mathematics) , fishery , depth sounding , abundance (ecology) , remote sensing , oceanography , mathematics , geology , computer network , computer science , pure mathematics
A 120 kHz echo sounder, with two split‐beam transducers, was used horizontally to monitor the behaviour of 0 + roach Rutilus rutilis , from June to August, in field enclosures. 0+ roach outside the vegetated area of the enclosures were registered both as schools and as single swimming fish. Combining echo counting and tracking with direct observation of echograms, an estimate of relative abundance of 0 + roach in the open water volume was obtained also. With this set up, intermediate sized field experiments studying 0 + fish, may be performed during the whole summer season.