Morpho-Edaphic Indices of Heterobranchus longifilis (Valenciennes) in a Nigerian Basin

Abstract

Data on the morphometric indices and habitat preferences of Heterobranchus longifilis from Dodo River were obtained from monthly samples collected between April 1992 and September, 1993. In contrast with the observed ubiquitous distribution of other clariids by other workers, H. longifilis preferred the main river channel and grassy flooplain habitats. The morphometric measurements and meristic counts of 32 parameters are generated for the field identification of the species. Seasonal population structure showed a preponderance of females in the rainy season which coincided with the breeding season of the Species.