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Abstract
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Article Information:
Salinity, Dissolved Oxygen, pH and Surface Water Temperature Conditions in Nkoro River, Niger Delta, Nigeria
J.F.N. Abowei
Corresponding Author: Abowei Jasper
Submitted: 2009 October, 29
Accepted: 2009 November, 14
Published: 2010 January, 10 |
Abstract:
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Salinity, dissolved oxygen, pH and surface water temperature conditions in Nkoro River, in the
Niger Delta area of Nigeria was studied for a period of one year (January – December 2008). The response of
estuarine fishes to changes in salinity, dissolved oxygen, pH and surface water temperature conditions does not
only enhance our biological understanding of estuarine fish, but contributes to the understanding of the potential
effects of anthropogenic impacts on estuarine fish species. Dissolved oxygen meter of the model: OxyG uard
Handy MK II was used in measuring dissolved oxygen and temperature. pH was measured using pH meter
(model: Hanna Instrument model No. H1 8915 ATC) while salinity was measured using salinom eter, model:
New S-100.for each of the parameters. The probe end of the meter was dipped into the river while the value
at the pointer of the scale was read off and recorded. The measurements were taken while inside the canoe
along Nkontoru – Job Ama, which is part of the Nkoro river system. Dissolved oxygen (DO) was measured in
milligrams per litre (mg/I); temperature in ºC (degrees centigrade); and salinity was in parts per thousand (ppt
or %o). Salinity values ranged from 5‰ (September) to 17‰ (February and March). Dissolved Oxygen values
ranged from 6mg/l(January, April, July and October) to 10mg/l (September). PH values ranged from
6.1(August) to 8.5(November) and Temperature values ranged from 24 0 ºC (July) to 32 0 ºC (M arch). Salinity
values ranged from 12.8±0.30 (‰) (station 4) to 13.3±0.10(‰) (station 3). Dissolved Oxygen values ranged
from 3.2±0.1 (mg/l)(station 3) to 7.3±0.16 mg/l(station 1). pH values ranged from 7.3±0.17 (station 1)
to7.7±0.14(station 3) and Temperature values ranged from27.3±0.24(station 1) to33.7±0.21(station 3). There
was no significant difference in salinity and pH between stations, but dissolved oxygen, and temperature
showed significant differences between stations (P#0.05). The results of the correlation matrix analysis showed
significant correlation between the variables at different stations. The association between the environmental
variables in the Nkoro river was generally similar because the water at the stations was seemingly from the
same source, Atlantic Ocean through Bonny River. Positive association was observed indicating functional
similarity. The varying magnitude of the relationship between the water variables in lower Bonny River of
Niger Delta was attributed to micro habit differences.
Key words: Dissolved oxygen, Nigeria, Niger Delta, Nkoro River, pH, salinity, temperature
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Cite this Reference:
J.F.N. Abowei, . Salinity, Dissolved Oxygen, pH and Surface Water Temperature Conditions in Nkoro River, Niger Delta, Nigeria. Advance Journal of Food Science and Technology, (1): Page No: 36-40.
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ISSN (Online): 2042-4876
ISSN (Print): 2042-4868 |
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