Papers/Abstracts

A Survey of Fishes of the Geebo – Dugbe River Confluence, Sinoe County, Liberia, with an Emphasis on Tributary Creeks

Frank Pezold, Ray C. Schmidt and Melanie L. J. Stiassny

aqua International Journal of Ichthyology,  pp. 97-122, Volume 22 issue 3, 15 July 2016

Keywords

West Africa, range expansion, development, EIA, Nothobranchiidae.

Abstract

A survey of the ichthyofauna of the Geebo-Dugbe watershed in Sinoe County, Liberia was undertaken in anticipation of future economic developments. The watershed lies between Sapo National Park and the Grand Kru-River Gee National Forest and is believed to serve as a wildlife corridor between the two preserves. Small first or second order streams predominated in the region. Stream sites visited varied from minimal to severe in the degree of impact from artisanal mining, logging and agriculture, yet forty-five species representing 20 families were recorded from the watershed. The diversity of species obtained in this small area of the Dugbe River basin compares well with studies of other West African rivers in the Upper Guinean Province. Consistent with the correlation of species number with the size of the immediate watershed and position in the basin as a whole, species richness of individual collections was low, only occasionally higher than 8-10 species at a single site. Fish biomass or abundance was also low. Epiplatys olbrechsti, an undescribed Epiplatys species, ‘Barbus’ cf. guildi, Hemichromis bimaculatus, Bryconalestes longipinnis and Amphilius atesuensis were commonly encountered in the small streams. The most abundant species taken from cascades in the Geebo River were Doumea chapuissi, Labeobarbus wurtzi, Parasicydium bandama and Sicydium crenilabrum. Five of the species reported here represent new records for Liberia – Marcusenius meronai, Bryconalestes derhami, ‘Barbus’ cf. guildi, Parasicydium bandama and Sicydium crenilabrum. Our discoveries of other species in the basin represent range extensions significant to understanding their distributions throughout the region.

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