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Nibbling Frequency of Carps in Periphyton-Based Aquaculture Systems with and without Supplemental Feed

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Title: Nibbling Frequency of Carps in Periphyton-Based Aquaculture Systems with and without Supplemental Feed
Authors: Rai, Sunila
Yi, Yang
Keywords: carps
bamboo stick
supplemental feed
periphyton-based polyculture
LC Subject Headings: Fish culture--Israel.
Fish culture.
Issue Date: 2012
Series/Report no.: The Israeli Journal of Aquaculture - Bamidgeh
Abstract: The nibbling frequency of five carp species (rohu Labeo rohita, mrigal Cirrhinus mrigala, catla Catla catla, common carp Cyprinus carpio, silver carp Hypophthalmichthys molitrix) on bamboo lateral sticks (kanchi) colonized by periphyton was examined in fed and unfed systems. There were three treatments: (a) no carp and no supplemental feed (control), (b) carp without supplemental feeding (unfed treatment), and (c) carp with supplemental feeding (fed treatment). For 12 h (07:30-19:30) during six days, nibbling behavior was observed in real time via a digital video camera and recorded on a camcorder for later viewing. Rohu, catla, and common carp nibbled on the kanchi, while mrigal and silver carp did not. In rohu and catla, the nibbling frequency was significantly higher in the unfed treatment than in the fed treatment (p<0.05); supplemental feeding reduced nibbling frequency by 81% and 91%, respectively. Hence, in periphyton-based aquaculture systems, there is no need for a high density of substrates in ponds that receive supplemental feed. Alternatively, the amount of supplied feed can be reduced to force these species to consume more periphyton.
Pages/Duration: 5 pages
ISSN: 0792-156X
Appears in Collections:Volume 64, 2012

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