IJSR - International Journal of Scientific Research

Yakasai JB; BA Yakasai; MD Faruruwa; Aghanwa CI

Volume : VII, Issue : V, May - 2018

Effects of freezing period on the pH, crude protein and some essential minerals in Catfish (Clarias gariepinus) and Tilapia (Oreochromis niloticus) cultivated in Kaduna Metropolis, Kaduna State, Nigeria.

Yakasai Jb, Ba Yakasai, Md Faruruwa, Aghanwa Ci

Abstract :

This study was carried out to examine the effects of freezing period on pH, crude protein and some minerals (Calcium, Magnesium, Iron, Potassium and Sodium) levels in Catfish(Clariasgariepinus) and Tilapia (Oreochromisniloticus) fish cultivated in Kaduna Metropolis, Kaduna State. The fishes were collected from four major markets within the sampling areas. The results of the study showed that pH values ranged from 6.5 – 7.8,The Crude protein level ranged from 27.30 – 45.50% and the mineral content were as follows: Iron (0.33 – 2.52 mg/Kg), Sodium(4.55 – 7.20 mg/ Kg), Potassium(2.26 – 3.14 mg/ Kg), Magnesium(0.85 – 1.80 mg/Kg), and Calcium(0.31 – 0.87 mg/ Kg). The result indicated that pH is only affected after 30 days of freezing which resulted in increase of the value. The fish protein level decreases slightly with freezing period, however, the fishes were good in protein and can satisfactorily provide the necessary protein requirement for human consumption even after the freezing period of 30 days. The minerals were generally low (below the dietary daily value of minerals in fish as recommended by USEPA, 2016) and seem not to be affected during freezing duration.