Table 1: Description of sampling stations.

Sampling Stations	Observed Features
C1(Concrete pond 1)	The pond is at Fajuyi area in Ile-Ife. The pond is in a closed, fenced and roofed area; also refuse is being dumped behind the fence and waste water from bathroom flows close to the concrete pond.
C2(Concrete pond 2)	The pond is at Fajuyi area in Ile-Ife. The pond is in a closed, fenced and roofed area; also refuse is being dumped behind the fence and waste water from bathroom flows close to the concrete pond.
E1(Earthen pond 1)	The pond is at Fajuyi area in Ile-Ife. The station is close to a primary school and a farm land, surrounded with plantain and banana plantation with other trees; and the pond was covered with a net to prevent bigger animals from picking up fish.
E2(Earthen pond 2)	The pond is at the Fajuyi area in Ile-Ife. The station is in a compound, with a well close to it, surrounded with plantain and banana plantation with other trees, and the pond was covered with a net to prevent bigger animals from picking up fish.
T1(Tank pond 1)	The pond is at Oke Opa area in Ile-Ife. The pond is in a compound where snails and poultry are being reared, having a cashew tree in the compound. The pond is stocked with African cat fish covered with net. It also has a running tap in the compound which is used for fish farming.
T2(Tank pond 2)	The pond is at Oke Opa area in Ile-Ife. The pond is in a compound where snails and poultry are being reared, and a cashew tree is also present. The pond is stocked with African cat fish covered with a net. It also has a running tap in the compound which is used for the fish farming.