Effects of Short-term Food Deprivation on Channel Catfish and Implications for Culture Practices

Autor: Kenneth N. Randolph, Howard P. Clemens
Rok vydání: 1978
Předmět:
Zdroj: The Progressive Fish-Culturist. 40:48-50
ISSN: 1548-8640
0033-0779
DOI: 10.1577/1548-8659(1978)40[48:eosfdo]2.0.co;2
Popis: Food was withheld from channel catfish (Ictalurus punctatus) for intervals of 1, 3, 5, and 7 days to evaluate the influence of short-term deprivation on behavior and growth. The initial behavioral response to the withholding of food in demand feeders was a reduction in the number of feeding demands and in the time spent waiting at the feeder. As the period of deprivation increased, fish spent less time at the feeder and more in their home areas. After 1 day of deprivation, fish ate 10 to 17% more than they ate before, but on the first day of feeding after 5 and 7 days of deprivation fish ate 12 and 36% less than was expected. The return to pre-deprivation levels of feeding required about 1 day for each day of missed feeding; however, it took 2 days for the previous rate of growth to be resumed for each day food was withheld. Thus, the primary implication of short-term food deprivation in culture practices is a substantial reduction in growth.
Databáze: OpenAIRE
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