New Zealand Journal of Marine and Freshwater Research abstracts

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WEED PREFERENCE AND GROWTH OF YOUNG GRASS CARP IN NEW ZEALAND

D. J. Edwards

Fisheries Research Division, Ministry of Agriculture and Fisheries, P.O. Ngapuna, Rotorua, New Zealand

Abstract In each of eight 5-day pond experiments carried out at intervals over a year, 0+ to 1 +-year-old grass carp, Ctenopharyngodon idella Val., were offered a choice of at least 10 species of water weeds from the Rotorua area. Water temperature was measured each day. Food selectivity decreased with increasing temperature and size of fish, but preference for the weeds did not change. At summer temperatures the fish ate much weed and grew at about 4g/fish/day, but in winter little food was taken and growth was slow.

N.Z. Journal of Marine and Freshwater Research 8 (2): 341 - 50.
(Received for publication 4 September 1973)

PDF file of entire paper: medium quality (664K); (scanned from paper original: notes about this process)

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