Effectiveness of Fish Aggregating Devices in Freshwater Reservoir Fishery
Effectiveness of Fish Aggregating Devices in Freshwater Reservoir Fishery
Date
2002
Authors
Madhavan, N
Neethiselvan, N
Journal Title
Journal ISSN
Volume Title
Publisher
Society of Fisheries Technologists (India)Cochin
Abstract
Two types of bottom set Fish Aggregating Devices (FADs), one of pyramidal shape and
another of semi-prismatic shape were constructed using used tyres having a total outer surface
area of 60 m2
. They were tested for their aggregating efficiency in an artificial freshwater
reservoir stocked with freshwater carps such as catla (Catla catla), rohu (Labeo rohita), mrigal
(Cirrhinus mrigala) and silver carp (Hypopthalmicthys molitrix). The gill net catch around FADs
and in non-FAD sites showed significant difference. Pyramidal FAD of 1.6 m height with
tyres arranged in vertical orientation attracted more of surface feeders such as catla and silver
carp compared to semi-prismatic FAD of 1.3 m height with tyres arranged in horizontal
pattern. The gill net catch around pyramidal FAD was significantly higher than that of semiprismatic
FAD. The use of pyramidal FAD to improve catch per unit effort of gill netting
in perennial reservoirs of the country, is suggested
Description
Keywords
Fish Aggregating Devices, reservoir fisheries, catla, rohu, mrigal
Citation
Fishery Tech 39(1):11-14