ISSN:
1573-5117
Keywords:
silver carp
;
biological control
;
algae
;
zooplankton
;
organic matter
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract When silver carp were introduced into the Netofa reservoirs at an initial density of 300–4500 fish per hectare in order to control phytoplankton and zooplankton, there was a significant reduction of algae, zooplankton, and suspended organic matter; the silver carp prevents the growth of blue-green algae. Annual yield ranged from 600 to 1500 kg per hectare. The growth of individual fish after 6 to 8 years was 6 to 15 kg per fish. Introducing silver carp to reservoirs as a means of biological control creates a balanced ecological system in which the interspecific competition is minimal and the environmental improvements are considerable. Silver carp and bottom-feeding fish create a positive synergism in the water-body by filtering phytoplankton and zooplankton from the water, excreting a major part of it to the bottom and enriching it with organic matter suitable for zoobenthos.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00026038
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