Localization of Lake Nokoué (De Kimpe, 1967) 

Localization of the Kakum River (Okyere et al., 2011). 

Variation of specimen number in relation to height classes in males of P. obscura in Lake Nokoué. 

Variation of specimen number in relation to height classes in females of P. obscura Lake Nokoué. 

Variation of specimen number in relation to height classes in males of P. obscura in Kakum River. 

Variation of specimen number in relation to height classes in females of P. obscura in Kakum River. 

First sexual maturity height in females of P. obscura in Lake Nokoué. 

First sexual maturity height in females of P. obscura in Kakum River. 

Variation of gonado-somatic and hepato-somatic indexes in females of P. obscura in Lake Nokoué. 

Variation of gonado-somatic and hepato-somatic indexes in males of P. obscura in Lake Nokoué. 

Variation of gonado-somatic and hepato-somatic indexes in females of P. obscura in Kakum River. 

Variation of gonado-somatic and hepato-somatic indexes in males of P. obscura in Kakum River. 

Length-weight relationship in specimens of P. obscura in Lake Nokoué. 

Length-weight relationship in specimens of P. obscura in Kakum River.