The Efficiency of Two Nile Fishes as Biocontrol Agents Against Different Stages of Schistosomiasis Intermediate Host.

Abstract

The present investigation is dealing with the biological control of schistosome intermediate host, two Nile fishes Debs (Labeo niloticus) and the Nile Bulti or Tilabia (Cyrinus carbio) were selected to determine their efficiency to control schistosomiasis intermediate host (snails). Six laboratory sets of experiments were designed, three for Bulinus truncatus and other three for Biomphalaria pfeifferi. The first set in each snail species were control group, while the other two provided with the two Nile fishes, to investigate the efficiency of the selected biocontrol agents. In control set, gradual reduction of egg-masses, neonates and adult snails of both schistosomiasis snails. Compared with the control set, the two fishes verified to be highly efficient predators against egg-masses and neonates of the two snails (P < 0.001). While in case of the adults of both species reduced also very gradually.

Biological control of Biomphalaria, the intermediate host of Schistosoma spp.: a systematic review

“…The earliest attempts at biological control of Biomphalaria were based on predation (Tables 1, 2, and 3), by fish (OLIVER- GONZÁLEZ, 1946). Laboratory studies have shown that Sarotherodon mossambica, Tilapia rendalli, T. nilotica, Gambusia affinis, Labeo niloticus, and Cyrinus carbio all prey on the egg masses and neonates of Biomphalaria (GRABER et al, 1981;ANDRADE, 1982;SULIEMAN et al, 2015;AFIFI & AHMED, 2018). Other species have been observed to prey on adult snails, and these include: Sargochromis codringtoni, G. affinis, L. niloticus, C. carbio, and Clarias gariepinus (CHIMBARI et al, 1996;1997;GASHAW et al, 2008;SULIEMAN et al, 2015;AFIFI & AHMED, 2018).…”

“…Laboratory studies have shown that Sarotherodon mossambica, Tilapia rendalli, T. nilotica, Gambusia affinis, Labeo niloticus, and Cyrinus carbio all prey on the egg masses and neonates of Biomphalaria (GRABER et al, 1981;ANDRADE, 1982;SULIEMAN et al, 2015;AFIFI & AHMED, 2018). Other species have been observed to prey on adult snails, and these include: Sargochromis codringtoni, G. affinis, L. niloticus, C. carbio, and Clarias gariepinus (CHIMBARI et al, 1996;1997;GASHAW et al, 2008;SULIEMAN et al, 2015;AFIFI & AHMED, 2018). In the field, Serranochromis macrocephala and Astatoreochromis alluadi were able to reduce Biomphalaria populations (DE BONT & DE BONT, 1952;MCMAHON et al, 1977).…”