February 2016

Report of fish mass mortality from Lake Hashenge, Tigray, Northern Ethiopia and investigation of the possible causes of this event

This study was intended to report the disastrous mass mortality of Nile tilapia (Oreochromis niloticus) and common carp (Cyprinus carpio) in Lake Hashenge, Tigray occurred in June, 12 to 15th, 2014 and to investigate the possible causes of this phenomenon. The dissolved oxygen (DO) of the water of the lake was 2.20 mg/L in the north part and 2.09 mg/L in the south west part of the lake with an average of 2.15 mg/L. The...

Author(s): T. Teame, P. Natarajan, H. Zebib and G. Abay

February 2016

The joint action effects of the binary mixtures of some botanical piscicides on post juvenile Clarias gariepinus

Botanical piscicides over the years have been used singly in fishing efforts. This research investigated the joint action of binary mixtures of Carica papaya + Nicotiana tabacum, Anacardium occidentale + Senna occidentalis, and A. occidentale + Luffa cylindrica. Relative toxic units (RTU) estimations and synergistic ratio (SR) models were used in the joint action evaluation. The 96 h LC50 (95% confidence limit [CL])...

Author(s): Ekpendu E. A., Saliu J. K. and Otitoloju A. A.