Optimization of dugout ﬁsheries for climate change adaptation in Northern Region, Ghana
The ﬁsheries sector is one of the climate sensitive areas that could be impacted by climate change. Increases in temperature, ﬂoods or drought will alter water level/availability for growth and survival of most ﬁshes in dugouts. Adaptation strategies are needed to respond or cope with actual and projected dwindling of inland ﬁsh stock. Northern Ghana abounds with numerous dugouts and reservoirs which could be harnessed for higher ﬁsh production in view of climate change. A Tilapia is proliferous ﬁsh that can tolerate harsh climatic conditions including ﬂuctuating water levels and high temperature. This paper assesses Tilapia; Oreochromis niloticus for ﬁsh stock enhancement in water stress dugouts. Effects on ﬁsh stocks was determined through ﬁsh catch assessment and water quality monitoring. Total ﬁsh catch was sorted into species, enumerated and weighed. Results showed that the survival rate of the Tilapia (O. niloticus) stocked under extensive culture system was 99.6% excluding predation. This study indicates that O. niloticus was ideal for ﬁsh stock enhancement and could be adopted to increase ﬁsh yield, improve adaptation to climate change and increase economic returns from dugout ﬁsheries. The study also revealed that water quality of dugouts improved due to good ﬁshery management intervention.