Wednesday, December 2, 2009

grass carp lebih suka hydrilla daripada enceng gondok

Grass Carp

The Grass Carp, Ctenopharyngodon idella, has been introduced with the objective of controlling aquatic weeds. The grass carp is very efficient at consuming submerged aquatic weeds, such as Hydrilla verticillata, Ceratophyllum demersum, and Najas indica, consuming sometimes consuming as much as 125% to 150% of its weight in aquatic weeds per day. However, as regards the floating aquatic weeds such as Eichornia crassipes, the fish would normally only consume the roots and young leaves if other preferred food weres available.

Grass Carp cannot breed in the open waters of Rawa Pening. If there is any desire to maintain the stock of grass carp in the lake to reduce the volume of aquatic weeds in the lake, then a fish breeding station should be established on Rawa Pening to ensure an adequate supply of fingerlings. Fingerlings could then be supplied from the fish breeding station to other lakes in Central Java with an aquatic weed problem.

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