TL;DR: Investigation of parasitic infections of anurans in an urbanized rainforest biotope in the Diobu, Port Harcourt area of Rivers State concluded that habitat alteration not only reduces anuran species diversity, but can also alter the transmission dynamics of some parasites in the altered environment.
Abstract: The parasitic infections of anurans in an urbanized rainforest biotope in the Diobu, Port Harcourt area of Rivers State were investigated. The few anuran species encountered included Afrixalus fulvovittatus , Amietophrynus regularis , A. cameroonensis , Hyperolius concolor phase B, Hyperolius concolor phase C, Hoplobatrachus occipitalis , Phrynobatrachus sp., Ptychadena mascareniensis and Plychadena pumilio . Overall prevalence parasite prevalence in the anurans investigated was 67.4%. The ten parasite species recovered consisted of a pentastomid ( Raillietiella sp), one cestode ( Cylindrotaenia jaegerskioeldi ), one monogenean ( Polystoma pricei ), two digeneans ( Diplodiscus fiscthalicus and Mesocoelium monodi ) and four nematode species ( Cosmocerca ornata , Chabaudus leberrei , Amplicaecum africanum and a Rhabdias sp.). Unusual infection patterns were observed in some of the parasites encountered in this altered environment. The cystacanths of the acanthocephalan encountered occurred in aggregations with as many as 70 larvae occurring in cysts recovered from P. pumilio . This is possibly a parasitic adaptation to ensure effective delivery of infective stages in an unstable environment. The high (66.7%) prevalence of C. jaegerskioeldi in A. fulvovittatus is also unusual. We attribute this to an increase in the population of the intermediate hosts (beetles) occasioned by habitat alteration. The high prevalence of C. leberrei in H. concolor is also presumed to be related to the abundance of mosquito vectors in the study area. We concluded that habitat alteration not only reduces anuran species diversity, but can also alter the transmission dynamics of some parasites in the altered environment. Keywords: Anurans; parasites; rainforest; urabnizations; Nigeria
TL;DR: The parasitic infections of anurans from three biotopes in Rivers State, Nigeria were investigated and it is suspected Hyperolius concolor to be a paratenic rather than a definitive host for the immature Camallanus sp.
Abstract: The parasitic infections of anurans from three biotopes (lowland forest, freshwater swamp and brackish water swamp) in Rivers State, Nigeria were investigated. A total of 94 anuran specimens were examined; 32 from the lowland forest, 28 from the freshwater swamp and 34 from the brackish water environment. Of the three biotopes, amphibians from the lowland forest harboured more parasite species. In total, 24 parasite species were recovered, including a pentastomid; larval acanthocephala; one cestode; one monogenean; sevendigeneans and thirteen nematode species. Only five of the 24 parasite species recovered were common to anurans from the three biotopes. Others were either restricted to one ecological habitat or were also found in hosts from a second habitat. A form of association seems to exist between ciliates and the Cephalochlamys compactus recovered from Hoplobatrachus occipitalis collected from the lowland forest. Hymenochirus sp. is a new host record for Progonimodiscus colubrifer, having been previously described from Silurana tropicalis. Aplectana mackintoschi is both a new geographical record for Nigeria and a multi-host parasite. We suspect Hyperolius concolor to be a paratenic rather than a definitive host for the immature Camallanus sp. recovered from the frog. Other parasites using anurans as paratenic hosts were also encountered.Keywords: Anurans, parasites, ecological biotopes, Rivers State, Nigeria