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vol-6MlNERAL CONTENT OF FLESH 01′ SOME RED SEA FISHES
By
A.F.A. I.atif and A.M.A. Foud.1
BULLETIN 01l~ TH~ INSTIT1.?.flE OF’ OCIDA~OGRAPIIY & l!~ISHh.’RIlDS 85
SUMMARY
1. The minerals, here examined in flesh of twenty
five species of Red Sea fishes, are (mostly) present in
the decreasing order: K, P, Na, Mg, Ca and Fe.
2. Sodium ranged from 57.02 to 135 mg %and has
an aver age of 89.03, standard deviation is 22. 1 and
coefficient of variation is 24.8. Most species have
sodium content less than 100 mg %.
3. For potassium, range from 260.12 to 615.45
mg %, average 415.94 mg %, standard deviation 105,
coefficient of variation 24.5. A range of K cpntent
between 300 and 500 mg % included most species.
4. For calcium, range 18.9 – 43.5 mg %, average
25.21 mg %, standard deviation 5.6, coefficient of
variation 22. The range of calcium content between
20 and 30 mg%, included most species.
5. Phosphorus content ranged from 149 to 397.6
mg % and has an average of 239.9 mg %. Most of
species belong to range between 200 and 300 mg %.
For different species, standard deviation was computed
as 58 while the coefficient of variation was 24.
6. For magnesium; range 18.46 – 56.9 mg %,
average 29.4 mg %, standard deviation was computed
as 8.5 while the coefficient of variation was 29.
7. For iron: range 0.425 to 2.35 mg %, average
1.03 mg %’ standard deviation 0.5, coefficient of variation 48.6. Most species belong to Fe content range
between 0.5 to 1 mg %. The high iron content is recorded
in active fishes.
8. A direct correlation exists between contents of
sodium and potassium. Correlation coefficient computed as 0.92. The relationship between these two minerals
can be described by the equation Y = 4.8 X – 22.21
(Y = K content, X = Na content).
9. No correlation exists between phosphorus and
calcium or between magnesium and iron.
10. A direct relationship exists between magnesium
and calcium and the correlation coefficient was computed as O. 85. The relation is described by the equation:
Y = 1.29 X – 3.1 (Y = Mg content and X = Ca
content).
11. The idea of Camara – Besa that high content
of ash is associated with low sodium and that high
protein paralleled high potassium is apparently Dot
always true.
