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The study was carried out to investigate the differences in morphometric traits of Chrysichthys nigrodigitatus inhabiting a purely lacustrine freshwater and lotic brackishwater environments in Nigeria. The specimens were obtained from the New Calabar River (Brackish) and Oguta Lake (Freshwater) during fields trips in during 2018. A total of 80 individuals comprising of 40 from each water body were analysed for 16 morphometric traits. The head length and head width were not significantly different (p>0.05) in the species between the two locations. The ratio (%) of predorsal fin length to standard length, preanal fin length to standard length, prepectoral fin length to standard length, body depth to standard length, gut length to standard length were also not significantly different (p>0.05) for the two locations. However, other parameters such as snout length, the dorsal fin Length, dorsal fin depth, anal fin length and pectoral fin length and ratio of head length to standard length, snout length to head length, and pectoral fin length to standard length differed significantly (p |
