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Electrofishing for fish larvae and 0+ juveniles: equipment modifications for increased efficiency with short fishes
Author(s) -
COPP G.H.
Publication year - 1989
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.1989.tb00372.x
Subject(s) - electrofishing , biology , fishery , larva , fish larvae , fish <actinopterygii> , range (aeronautics) , ecology , zoology , materials science , composite material
. Efficient use of electricity to collect fish larvae and 0+ juveniles can be achieved by reducing anode size relative to the cathode, demonstrated on two portable backpack‐style electroshockers: the Martin Pecheur II and the Deka 3000. The effective field of galvanotaxis/narcosis of the anode was defined through technical tests, and the frequency distributions of samples from three floodplain ecosystems demonstrated a wide range of 0+ fishes collected: from 5 to 20mm for larvae, and from 9 to 200 mm for O+ juveniles. Advantages of collecting 0+ fishes with electrofishing by point samples are reviewed.