Abstract:

113 sea urchins Strongylocentrotus intermedius were randomly chosen from 25 families and the test height, test diameter, body weight, test volume, test weight, test dry weight, gut wet weight, Aristotle’s lantern height, Aristotle’s lantern diameter, Aristotle’s lantern weight, gonad wet weight, gonad index, gonad moisture, total glucose content, total protein content, total amino acid content and fatty acid composition were measured and then analyzed. The results showed that the character of test, Aristotle’s lantern and gut had no significant difference among families and between genders. Gut wet weight, test volume and body weight had high variation in the population. Gonad index was highly significantly different among families, and also between genders; and gonad wet weight was significant different among families, and highly significantly different between genders, both them had high variation in the population. The gonad color lies between bright yellow and bright orange red. △E1 (light orange-yellow color difference) and △E2 (light yellow color difference) were both significantly different among families. Gonad color of female sea urchins was significantly better than male. The total protain and amino acid content had very significant difference. EPA and AA content in the gonad total lipid was (5.42±4.05)% and (4.42±2.92)%. DHA was a little lower (0.94±0.86)%, but with high variation (92.99%) and highly significant difference among families. Duncan Multiple Comparison showed that, the families that have better gonad trait were SIF2-16, SIF2-10, SIF2-7. The test diameter sorted from superior to inferior was family SIF2-9, SIF2-21, SIF2-3. The sort list of body weight was SIF2-9, SIF2-20, SIF2-21.