Aquatic weeds as feed resources in fingerling production of grass carp Ctenopharygodon idella cuv. and val.

Boon Khai Goh, . and Ahyaudin Ali, . and Roshada Hashim, . (1995) Aquatic weeds as feed resources in fingerling production of grass carp Ctenopharygodon idella cuv. and val. [Proceedings Paper]

Fingerling grass carps Ctenopharyngodon idella Cuc. and Val were grown in fiberglass tanks for 12 weeks and fed with pellets mixed with aquatic weeds for 12 weeks in order to test the feasibility of growing fingerlings using aquatic weeds as feed materials. Four weed species Hydrilla verticillata Ottelia alismoides Ipomoea aquatica and Limnocharis flava were used in the feed formulations. Fish fed on fish-meal pellets control diet exhibitied the best growth P0.05 followed by I. aquatica O. alismoides H. verticillata and L. flava respectively. The daily growth rate exhibited by fish fe with control diet and I. aquatica is 0.093 and 0.087 g day respectively whereas those fed with fresh H. veritcillata is the slowest 0.052 g day. The feed conversion ratios FCR obtained are 8.20 8.85 9.64 14.03 and 68.97 for I. aquatica O. alismoides H. verticillata respectively. Although grass carp can grow on fresh weed diet such as H. verticillata the high FCR entails that large amount of weeds be given. Thus using aquatic weeds as one of the components of fish feed seems to be the most effective way to utilizing these weeds for economic purposes.

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Abstract

Fingerling grass carps Ctenopharyngodon idella Cuc. and Val were grown in fiberglass tanks for 12 weeks and fed with pellets mixed with aquatic weeds for 12 weeks in order to test the feasibility of growing fingerlings using aquatic weeds as feed materials. Four weed species Hydrilla verticillata Ottelia alismoides Ipomoea aquatica and Limnocharis flava were used in the feed formulations. Fish fed on fish-meal pellets control diet exhibitied the best growth P0.05 followed by I. aquatica O. alismoides H. verticillata and L. flava respectively. The daily growth rate exhibited by fish fe with control diet and I. aquatica is 0.093 and 0.087 g day respectively whereas those fed with fresh H. veritcillata is the slowest 0.052 g day. The feed conversion ratios FCR obtained are 8.20 8.85 9.64 14.03 and 68.97 for I. aquatica O. alismoides H. verticillata respectively. Although grass carp can grow on fresh weed diet such as H. verticillata the high FCR entails that large amount of weeds be given. Thus using aquatic weeds as one of the components of fish feed seems to be the most effective way to utilizing these weeds for economic purposes.

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Item Type:	Proceedings Paper
AGROVOC Term:	AQUATIC WEEDS
AGROVOC Term:	AQUATIC PLANTS
AGROVOC Term:	CTENOPHARYNGODON IDELLA
AGROVOC Term:	BIOLOGICAL CONTROL
AGROVOC Term:	METHODS
AGROVOC Term:	WEED CONTROL
Geographical Term:	MALAYSIA
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 05:13
URI:	http://webagris.upm.edu.my/id/eprint/11149

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