Survey of the Cymothoid Parasites Associated with some Estuarine Fishes (Actinopterygii) from the Upper Reaches of the Bonny Estuary Nigeria: Their use in Ecotoxicological StudiesUgbomeh AP1*, Nwosu OR2
- Corresponding Author:
- Ugbomeh AP
Animal and Environmental Biology Department
Rivers State University of Science and Technology Nkpolu, PMB 5080, Port Harcourt
E-mail: [email protected]
Received Date: 24/05/2016; Accepted Date: 18/06/2016; Published Date: 22/06/2016
Five hundred and forty two (542) fishes belonging to 9 species (Pomadasys peroteti, Tilapia spp, Arius gigas, Elops lacerta, Eucinostomus (Gerres) melanopterus, Pseudotolithus elongatus, Liza grandisquamis and L. falcipinnis) were collected from 5 landing sites along the upper reaches of the Bonny river in Nigeria and examined for macro-ectoparasites. Parasites isolated were Cymothoa exigua, C. hermani, Nerocila monodi, an unidentified Nerocila spp and Lironeca vulgaris. Total prevalence for all parasites was 37%. For each parasite, the host fish, parasitic specificity and prevalence are given. P. peroteti and Tilapia spp had the highest parasite prevalence. The Cymothoa species were found in the mouth replacing the tongue, in the pharynx attached to the gill arch and externally on the skin of P. peroteti and Tilapia, Lironeca vulgaris was found in the mouth while the Nerocila species were found on the skin. A toxicological survey of the concentration of heavy metals (Cd and Pb) in fish and parasite showed the absence of heavy metals in all parasites while the fish had concentrations above recommended permissible limits. There was no significant difference in the prevalence among stations.