Front pages with contents of No. 42, 1985

Drawing of Charles Darwin made in 1840 by George Richmond. Contents.

Front pages with contents of No. 51, 52, 53, 1994, Spanish version

Cover. Contents.

Front pages with contents of No. 53, 1994

Front cover. Contents.

Front pages with contents of No. 54, 1994

Cover. Contents.

Front pages with contents of No. 55, 1995

Cover. Information for Supporters of the Charles Darwin Foundation. Contents.

Front pages with contents of No. 54 and 55, 1995, Spanish version

Cover. Contents.

Front pages with contents of No. 56, 1996

Cover. Contents.

Front pages with contents of No. 57, 1996

Front cover. Contents.

Front pages with contents of No. 56 and 57, 1997, Spanish version

Front cover. Contents.

Front pages with contents of No. 58, 1997

Front cover. Contents.

Evaluation of the nutrient composition of some unconventional feedstuffs

A trial was carried out to evaluate the nutrient composition of some unconventional feedstuffs to ascertain their suitability for incorporation into fish feed. Pawpaw seed, mudskipper meal, water melon seed, almond kernel and groundnut husk were processed and analyzed for their proximate and mineral composition using internationally established procedure. The results obtained showed that the experimental feed stuffs had percentage crude protein that ranged from 7.38% to 55.85%. The highest level (55.85%) was found in mudskipper meal while the lowest (7.38%) was found in groundnut husk. The experimental feed stuffs had appreciable levels of calcium, potassium and phosphorus ranging from 0.29% to 1.87%, 0.17 to 1.26 and 0.06 to 0.97 respectively. Almond kernel can be used to replace soybean meal in aqua feed. Also, mudskipper meal can be used to replace fish meal in order to produce a cheaper fish feed; but it was recommended that feeding trials should be conducted to ascertain the inclusion level at which they can be effectively incorporated. The potentials of some of these feedstuffs in fish feed formulation seem high.

Front pages with contents of No. 59, 1998

Front cover. Table of Contents.