海洋科学2017，Vol.41Issue(8)：16-23,8.DOI:10.11759/hykx20140110001
盐度对瘤背石磺幼贝存活、生长性能和肌肉生化成分的影响
Effects of salinity on survival, growth performance, and bio-chemical composition of muscle in juvenile Onchidium struma
摘要
Abstract
To investigate the effects of salinity on growth and the biochemical components of muscle in juvenile Onchidium struma, in this study, we cultured individuals [wet weight (2.96 ± 1.02) g] with artificial seawater at different salinity levels (5, 15, 25, 35 and 45) for 60 days, and then determined the growth performance and nutri-tional composition of the muscle. The results indicate that: (1) Onchidium struma grows well in a salinity range of 25-45, with a survival rate over 90％. The rate of weight gain, specific growth rate, and protein efficiency ratio at a salinity of 25 was significantly higher than those at other salinity levels (P < 0.05) and the feed conversion ratio was also decreased significantly (P < 0.05). (2) With an increase in salinity, the muscle moisture of Onchidium struma decreased significantly (P < 0.05), crude ash showed an increasing trend after an initial decrease, and the effect on muscle of the calcium and phosphorus content was not significantly different (P > 0.05). The crude protein content was highest at a salinity of 25, or 76.66％, and the crude fat content increased significantly in high salinity (P < 0.05) and had the lowest and highest at salinity levels of 25 and 45, respectively. (3) Most amino acids showed a de-creasing trend after an initial increase with an increase in salinity. We observed the highest level at a salinity of 25, although the difference was not significant. The amino acid flavor of glutamic acid, aspartic acid, and proline were significantly affected by salinity. (4) The effect of salinity on every type of fatty acid was significantly different, and the n-3 PUFA and n-6 PUFA increased over a salinity range of 5 to 35, whereas the n-3 PUFA/ n-6 PUFA values gradually increased. Unlike most seawater shellfish, the DHA content of Onchidium struma is far lower than the EPA content. These test results indicate that salinity has a significant effect on Onchidium struma growth perform-ance and the biochemical composition of muscle, and that the appropriate salinity level can improve Onchidium struma muscle quality and flavor.关键词
瘤背石磺(Onchidiumstruma)/盐度/生长性能/肌肉成分Key words
Onchidium struma/salinity/growth performance/muscle composition分类
农业科技引用本文复制引用
陈威,沈永龙,黄金田,李强,张明明..盐度对瘤背石磺幼贝存活、生长性能和肌肉生化成分的影响[J].海洋科学,2017,41(8):16-23,8.基金项目
国家自然科学基金项目 (31470130) [National Natural Science Foundation of China, Respiratory Mechanism & Structure and Expression of Hemocyanin Gene of Onchidium struma, No.31470130] （31470130）
