THE EFFECTS OF POLLUTION ON A STRETCH OF RIVER KUBANNI, ZARIA, NIGERIA
THE EFFECTS OF POLLUTION ON A STRETCH OF RIVER KUBANNI, ZARIA, NIGERIA
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Date
1995-11
Authors
ADAKOLE, John Ameh
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Abstract
River Kubanni a major tributary of river Galma. recieves
both organic and inorganic wastes through run-offs and seepage
from some residential and agricultural areas of Tudun-Wada
Zaria.
Water, plankton and benthic samples were collected once
a month from three stations on a stretch of the river, for
eight months (February, 1994 - October, 19940. The physicochemical
parameters, plankton and benthic composition were
determined and correlated to one another.
The distribution and composition of phytoplankton and
benthic fauna are affected by variations through fluctuations
in environmental variables such as temperature, velocity,
transparency, pH, dissolved oxygen, total alkalinity, total
hardness, electrical conductivity and total dissolved matter.
Low alkalinity results to low phytoplankton production while
a rise in total dissolved matter results to increase in
electrical conductivity and turbidity but a decrease of the
benthic population. The presence of Oscillatoria sp, Euglena
sp, Chironomous sp, Naids sp, Glossiphonia sp and the absence
of Ephemeroptera in stations 2 and 3 are indicative of organic
pollution in these stations. However, the river stretch is
rich for fish production with respect to water hardness
Tilapia and to some extent Alestes accumulated more trace
metals than Clarias. Tilapia, may therefore be a better
indicator species than Clarias for monitoring trace metal
concentration in the aquatic ecosystem.
Description
A THESIS SUBMITTED TO THE POSTGRADUATE SCHOOL AHMADU BELLO
UNIVERSITY, IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE
DEGREE OF MASTER OF SCIENCE (FISHERIES). DEPARTMENT OF
BIOLOGICAL SCIENCES, AHMADU BELLO UNIVERSITY, ZARIA
Keywords
EFFECTS,, POLLUTION,, STRETCH,, RIVER KUBANNI,, ZARIA, NIGERIA