Biological control of snail hosts transmitting schistosomiasis by the water bug, Sphaerodema urinator

Bibliographic Information
Authors: Younes A.; El-Sherief H.; Gawish F.; Mahmoud M.
Journal: Parasitology Research
Publisher: Springer Verlag
Publication Date: 15 February 2017
Volume / Issue: Volume 116 / Issue 4
Pages: 1257–1264
ISSN: 9320113
DOI: 10.1007/s00436-017-5402-5
Scopus: View on Scopus
PubMed: 28204958
Document Type: Article
Authors and Affiliations
Younes A., Department of Entomology, Faculty of Science, Cairo University, Giza, Egypt; El-Sherief H., Department of Entomology, Faculty of Science, Cairo University, Giza, Egypt; Gawish F., Department of Medical Malacology, Theodor Bilharz Research Institute, Giza, Egypt; Mahmoud M., Department of Medical Malacology, Theodor Bilharz Research Institute, Giza, Egypt
Abstract
The water bug, Sphaerodema urinator (Hemiptera : Belostomatidae), shares the same habitat of the freshwater snails in ponds, lakes, and streams. Studies conducted in lakes show that fish and crayfish predators play an important role in determining the abundance of freshwater snails. In contrast, shallow ponds and marches often lack fish and crayfish but have abundant insect predators. This study has been carried out to evaluate the predatory potential of S. urinator adult on two freshwater snails that serves as intermediate hosts of Schistosoma. Laboratory evaluation of predation by S. urinator on these intermediate hosts revealed that the adult bug could kill and consume the two intermediate hosts: Bulinus truncatus and Biomphalaria alexandrina. The number of snails consumed differed according to the snail type, size, and density. The times taken for searching and handling times were depending on the snail size, type, and vulnerability of the predator. The predation rate varied also with respect to snail type and density. Prey size is a major factor influencing predator preferences. This study indicated that the predator, S. urinator, may be a suitable bio-control agent in connection with Schistosoma intermediate hosts in the aquatic area. © 2017, Springer-Verlag Berlin Heidelberg.
Keywords
Freshwater snails; Predator; Schistosomiasis; Water bug; Animals; Biomphalaria; Bulinus; Helix (Snails); Insects; Pest Control, Biological; Predatory Behavior; Article; biological pest control; Biomphalaria alexandrina; Bulinus truncatus; controlled study; density; foraging behavior; Hemiptera; host parasite interaction; intermediate host; laboratory test; nonhuman; predation; prey; priority journal; Schistosoma; snail; Sphaerodema urinator; animal; Helix (snail); insect; parasitology; physiology; procedures
Citation Information
Scopus Citations: 22
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