| 长牡蛎壳金选育群体性腺发育与营养成分的周年变化 |
| |
| 引用本文： | 邓传敏,孔令锋,于瑞海,李琪.长牡蛎壳金选育群体性腺发育与营养成分的周年变化[J].中国水产科学,2017,24(1):40-49. |
| |
| 作者姓名： | 邓传敏 孔令锋 于瑞海 李琪 |
| |
| 作者单位： | 中国海洋大学海水养殖教育部重点实验室,山东青岛,266003 |
| |
| 基金项目： | 山东省科技发展计划项目(2014GHY115002)，泰山学者种业计划专家项目，农业科技成果转化资金项目(2014GB-2B020029) |
| |
| 摘 要： | 为了评估长牡蛎(Crassostrea gigas)壳金选育群体的繁殖周期及营养价值,自2013年11月至2014年10月,对山东省刘公岛海区长牡蛎第三代壳金选育群体的性腺发育、营养成分(总蛋白、总脂肪、糖原)季节变化及其与环境因子的关系进行了研究,并比较了与普通养殖群体营养成分的差异。结果表明,长牡蛎壳金选育群体雌雄比例接近1︰1,性腺同步发育;配子发生开始于2月,全年只有1个产卵季节(6―8月),7月为两性配子排放高峰期。配子成熟及排放期间,水温处于较高水平,食物充足,可为性腺发育提供能量,也有利于幼体的存活和生长。卵母细胞直径从配子发生开始逐渐增大,并在产卵前达到最大值(36.88μm),产卵后则降低。营养成分分析表明,脂肪含量在性腺–内脏团中随配子发育积累储存,产卵后显著降低;糖原在性腺发育到4月时开始下降,为配子的发育提供能量;蛋白质在配子发育过程中大量合成,与繁殖活动存在密切联系。长牡蛎壳金选育群体外套膜的总蛋白含量显著高于普通养殖群体(P0.05),糖原和总脂肪含量显著低于普通养殖群体(P0.05),其他组织的一般营养成分未出现显著差异。研究表明,长牡蛎在壳金群体选育过程中营养成分已表现出分化,这为长牡蛎壳色选育提供了重要参考依据。
|
| 关 键 词： | 长牡蛎 壳金选育群体 性腺发育 营养成分 环境因子 |
| 修稿时间： | 2017/1/12 0:00:00 |
Seasonal variation in gonadal development and nutritive components in the golden shell colored strain of Pacific oyster (Crassostrea gigas) |
| |
| DENG Chuanmin,KONG Lingfeng,YU Ruihai,LI Qi.Seasonal variation in gonadal development and nutritive components in the golden shell colored strain of Pacific oyster (Crassostrea gigas)[J].Journal of Fishery Sciences of China,2017,24(1):40-49. |
| |
| Authors: | DENG Chuanmin KONG Lingfeng YU Ruihai LI Qi |
| |
| Institution: | The Key Laboratory of Mariculture, Ministry of Education;Ocean University of China, Qingdao 266003, China |
| |
| Abstract: | Seasonal variations in gonadal development of third-generation Crassostrea gigas golden shell colored strain were investigated in relation to environmental factors from November 2013 to October 2014,and the general nutrient components of the mantle,gill,gonadal-visceral mass,and adductor muscle were examined.In addition,the nutritive content of the golden shell colored strain was compared with that of commercially cultured oysters.The histological analysis showed that the female to male sex ratio was approximately 1 ∶ 1,and the gonads of both C gigas sexes developed synchronously.Gametogenesis began in February and spawning started in June and appeared to continue until August when water temperature was high and food was abundant.Mean oocyte diameters increased gradually from the beginning of gametogenesis and reached their maximum (36.99 μm) before spawning.The biochemical analyses showed that total gonadal fat content was relatively low compared with that of total protein and glycogen,but fat accumulated as the gonads developed,indicating that lipid is a major component of bivalve oocytcs.Glycogen content decreased significantly during sexual maturation,whereas total protein content increased as the gametes matured.Golden shell colored oysters had significantly higher protein content,but significantly lower glycogen and fat contents in the mantle than those of commonly cultured oysters (P＜0.05).General nutritional composition was not different among the other three organs.These results indicate that nutritive content was similar in the common and golden shell colored oysters and provide data for breeding the golden shell colored strain in the future. |
| |
| Keywords: | Crassostrea gigas golden shell colored strain gonadal development nutritive content environmental factors |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《中国水产科学》浏览原始摘要信息 |
| 点击此处可从《中国水产科学》下载免费的PDF全文 |
|
