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Biochemical components of the tissues of Perna perna and P. viridis (Lineo, 1758) (Bivalvia: Mytilidae), in relation to the growth under conditions of suspended cultivation

Abstract:

In the organisms, the variations of the biochemical composition of reproductive and somatic tissues in the growth permit to infer about its adaptative to environment. In the present study, we evaluate the changes observed in carbohydrates, lipids and proteins of digestive gland, muscle and gonad tissues of Perna perna and P. viridis, growing in suspended culture at Cariaco Gulf, Venezuela. The reproductive condition of both mussels and environmental factors (temperature, chlorophyll a and of the seston) were determinate. The results show that, in both species, the gonadic lobes showed the highest variations in the biochemical component. The variations in the biochemical components were direct explained by the variations in the gonad development and the food availability, particularly chlorophyll a for P. perna and total seston for P. viridis. The temperature was a negative factor affecting P. viridis. Along almost the whole experimental period, the contents of the different energy components observed in P. perna were higher than P. viridis, this indicate species that P. perna show a major capacity to exploit the resources alimentary present under the conditions of suspended cultivation.