NUTRIENT COMPOSITION OF FRESHWATER FISH FAMILIES IN NORTHERN NIGERIA
NUTRIENT COMPOSITION OF FRESHWATER FISH FAMILIES IN NORTHERN NIGERIA
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Date
1998-10
Authors
ABDULLAHL, SHUAIBU AKPAI
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Abstract
The proximate, amino acid, nutritional values and mineral contents of fourteen fresh
water fish families viz: Cichlidae, Bagridae, Mochokidae Cyprinidae, Clariidae, Characidae,
Mormyridae, Schilbeidae, Citharinidae, Centropomidae, Distichodontidae, Gymnarchidae,
Osteoglossidae and Malapteruridae comprising of fourty species collected from Tiga dam, Zaria
dam, Shiroro dam and Niger-Benue Confluence were determined using standard procedures
of AOAC (1975 and 1980), Winberg (1971), TSM, FA) (1973) Atomic Absorption
spectrophotometer (AAS), Flame photometer and Spectronic 20. The carbohydrate, lipid and
protein were generally in the ratio of 1:2:4. The range of the nutrients contained were moisture
70.20-79.60g/100g wet weight, Ash 2.40 - 39.70, Organic matter 60.00 - 98.00, Carbohydrate
4.60 - 28.30, Lipids 15.80 - 56 40, protein 28.10 - 58.30g/100g dry matter while the calory was
235.62 - 728.90 k cal./l00g organic matter. These range of values were found to be within the
range recommended for human of all ages. Seventeen amino acids were also observed with
significant difference (P<0.05) between the most prominent was glutamic acid and the least
prominent was mainly methionine. However, the essential amino acids contained in all families
had values indicating that fish proteins are of good quality, this was confirmed by the high
values of Essential to non essential ratio, Essential to total nitrogen, Essential to protein ratio,
Essential amino acid index and protein scores. The results also indicated that calcium
dominated the mineral pool and the least was copper. The fresh water fishes were good sources
of dietary minerals. There was no significant difference (P>0.05) in all nutrients contained in
fishes collected from the four locations, however some nutrients were significantly higher
(P<0 05) during the wet seasons.
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Description
A THESIS SUBMITTED TO THE POST GRADUATE SCHOOL
AHMADU BELLO UNIVERSITY
ZARIA
IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE
A WARD OF THE DEGREE OF DOCTOR OF PHILOSOPHY
IN FISHERIES
Keywords
NUTRIENT, COMPOSITION, FRESHWATER, FISH, FAMILIES, NORTHERN, NIGERIA