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Effect of Ligula intestinalis on the reproductive capacity of Rastrineobola argentea in Lake Victoria
Author(s) -
Cowx I. G.,
Rollins D.,
Tumwebaze R.
Publication year - 2008
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.2008.02058.x
Subject(s) - biology , fecundity , population , reproduction , range (aeronautics) , fish <actinopterygii> , zoology , fishery , ecology , demography , materials science , sociology , composite material
This study examined the potential effect of the cestode Ligula intestinalis on the reproduction of the indigenous cyprinid Rastrineobola argentea in Lake Victoria. Ligula intestinalis had a marked effect on the breeding cycle of R. argentea . The proportion of the infected population in advanced stages of maturation prior to spawning was considerably reduced compared with uninfected fish. Infection by L. intestinalis significantly reduced the fecundity of individual fish, particularly in the 45–60 mm size range; the component of the population that makes the greatest contribution to reproductive output. The reduction in reproductive output of the R. argentea population could potentially affect replenishment of stocks in this important fishery.