Abstract
General condition, biochemical composition changes and fatty acids in several tissues of I. argentinus at different sexual stages were studied. Ovarian maturation involves a simultaneous increase in ovary mass and in protein and lipid levels. Testes weights were modified less than the ovary with maturation and showed a constant biochemical composition during spermatogenesis. The digestive gland grew through most of the maturation process in both sexes. Water level was high in immature squid and low in mature females and males, and varied inversely to that of lipids. Dorsal mantle maintained a constant biochemical composition, between February (immature) and June (fertilized females and mature males). All tissues contained high concentration of polyunsaturated fatty acids followed by saturated fatty acids and monosaturated fatty acids. This digestive gland of the squid is rich in polyenoic fatty acids, 20:5n-3 and 22:6n-3. This tissue could be a cheap raw material, presently discarded, for production of polyunsaturated fatty acids.
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