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The results of introducing grass carp, Ctenopharyngodon idella Val., into small lakes
Author(s) -
FOWLER M. C.
Publication year - 1985
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.1985.tb00306.x
Subject(s) - grass carp , stocking , biology , zooplankton , fishery , weed , population , fish <actinopterygii> , agronomy , zoology , ecology , demography , sociology
. Grass carp, Ctenopharyngodon idella Val., were introduced into three small lakes in the south Midlands, England to control submerged weeds. Control was variable, depending on the particular conditions in each lake, each year. After stocking at low density (61–130 kg/ha) grass carp were weighed annually, the greatest increase in growth being in Pusey Lake. In 4 years, their average weight increased from 85 g to 1250 g. In Shinrield Lake grass carp co‐existed with a varied population of coarse fish and the weed problem was controlled satisfactorily. Zooplankton, temperature, dissolved oxygen and plant distribution records were kept. At Pusey greatest weed control was achieved when spring temperatures were high, but weed species re‐appeared soon after the fish were removed.