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为了提高文蛤等经济贝类的稚贝成活率,对文蛤等7种经济贝类的生殖腺中脂肪及脂肪酸的含量进行了研究。试验结果表明:不同的贝类总脂肪含量不同,其中,缢蛏最高,可达25.48%,虾夷扇贝22.32%,文蛤21.27%,泥蚶19.89%,紫贻贝16.79%,杂色鲍15.75%,青蛤含量最低,只有14.88%。由于浙江沿海的缢蛏一般是在10~11月产卵、受精及完成胚胎发育,在这种低温条件下配子的成熟和受精卵发育需要大量的能量,缢蛏的脂肪含量为最高,精巢为11.02%(占所取样品干重),卵巢为14.46%。雌雄生殖腺的脂肪含量也不同,一般是雌性生殖腺脂肪含量明显高于雄性生殖腺。不饱和脂肪酸的含量大于饱和脂肪酸,其中,紫贻贝含量最高,为67.23%,文蛤次之67.19%,泥蚶第三64.27%,虾夷扇贝59.74%,缢蛏59.40%,青蛤最低,仅为57.51%。生殖腺的质量是繁殖成败的关键,其中脂质的积累是影响生殖腺发育的主要因素之一。
In order to improve the survival rate of juvenile shellfish, such as clam, the contents of fat and fatty acids in the gonads of seven kinds of economic shellfish such as clams were studied. The results showed that: the total fat content of different shellfish was different, among which the highest was .4,, up to 25.48%, 22.32% from Scallop, 21.27% from Clam, 19.89% from Scallop, 16.79% Cyclina content is the lowest, only 14.88%. As the shrimps in Zhejiang coastal area generally lay eggs, fertilize and complete the embryo development from October to November, a large amount of energy is required for the development of mature gametes and fertilized eggs at this low temperature, with the highest fat content in the catfish and 11.02% (Taking the dry weight of the sample taken), ovary 14.46%. Male and female gonadal fat content is also different, generally female gonads fat content was significantly higher than the male gonads. The content of unsaturated fatty acid was higher than that of saturated fatty acid, among which, the content of purple mussel was the highest, 67.23%, the second was 67.19%, the third was 64.27%, the second was 59.74% and the second was 59.40% 57.51%. The quality of the gonads is the key to the success or failure of reproduction, in which the accumulation of lipids is one of the main factors that affect the development of gonads.