title: Effect of running water on the predatory efficiency of the larvivorous fish Gambusia affinis.
abstract: Effects of standing and running water on the predatory efficiency of the larvivorous fish Gambusia affinis was tested at 6 different current speed: 0.0, 0.8, 2.4, 4.5, 8.5 and 10.2 ml/sec. G. affinis predated 25 Anopheles stephansi or 21 Culex fatigans (IV instar) during the test period of 10 hours. The predatory efficiency of G. affinis decreased remarkably to about 60% and thereafter gradually to about 30% in aquaria containing running water at the speed of 2.4 and 10.2 ml/sec, respectively.
authors.affiliation: Zoology Department, Bangalore University, Bangalore, India.
authors.forename: S Ravichandra
authors.initials: SR
authors.lastname: Reddy
authors.affiliation: Madurai University P.G. Centre, Arulmigu Palaniandavar Arts College, Palni, Tamilnadu, India.
authors.forename: T J
authors.initials: TJ
authors.lastname: Pandian