SEASONAL VARIATIONS IN THE PROXIMATE AND MINERAL CONTENTS OF THREE FRESH WATER FISHES IN MAIRUWA RESERVOIR, FASKARI, KATSINA STATE

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Date
2009-02
Authors
BABANGIDA, ABDULKARIM
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Abstract
A total of 1347 fish samples consisting of Synodontis clarias, Schilbe mystus and Mormyrus macrophthalmus collected from Mairuwa Reservoir, Faskari, Katsina State were analysed for the proximate and mineral contents using some fish parts and the whole fishes during the two seasons (dry and rainy) using standard methods and procedures. The lipid and protein contents were significantly higher (P<0.05) in the flesh. The carbohydrate contents were generally low in all the parts of the fishes studied. Ash contents were significantly high (P<0.05) in the bones and least in the flesh. The moisture content was generally low in all the parts studied (flesh, head and bones). Calcium and phosphorus were significantly (P<0.05) higher in the bones, while sodium and magnesium were significantly higher (P<0.05) in the flesh of all the three fish species. Zinc and Iron were significantly higher (P<0.05) in the bones, while potassium contents were least found in the bones. There were no significant differences (P>0.05) in the moisture contents of all the three species in the two seasons. The ash contents were significantly lower (P<0.05) during the rainy season. There were no significant differences (P≥0.05) in organic matter contents in all the three fish species in the two seasons. Carbohydrates and Lipids were significantly higher (P<0.05) during the rainy season. However, protein contents were significantly higher (P<0.05) during the dry season. Calcium, potassium, iron, sodium, phosphorus and zinc were significantly (P<0.05) affected by the seasons, while copper and magnesium were unaffected by the seasons. Higher contents of calcium, potassium, iron, sodium, phosphorus and zinc were observed during the rainy season in all the three fish species. The fish species have high nutritive values; as such their utilization will assist in the remedy of health and malnutrition problems among the populace.
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A THESIS SUBMITTED TO THE POST GRADUATE SCHOOL AHMADU BELLO UNIVERSITY, IN PARTIAL FULFILMENT OF THE REQUIREMENT FOR THE AWARD OF THE DEGREE OF MASTER OF SCIENCE IN M.Sc. (ED. BIOLOGY) DEPARTMENT OF BIOLOGICAL SCIENCES AHMADU BELLO UNIVERSITY, ZARIA. FEBRUARY, 2009
Keywords
SEASONAL,, VARIATIONS,, PROXIMATE,, MINERAL,, CONTENTS,, FRESH WATER FISHES,, MAIRUWA,, RESERVOIR,, FASKARI,, KATSINA STATE
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