Chum salmon fry grow faster in seawater, exhibit greater activity of the GH/IGF axis, higher Na+, K+-ATPase activity, and greater gill chloride cell development
Chum salmon fry grow faster in seawater, exhibit greater activity of the GH/IGF axis, higher Na+, K+-ATPase activity, and greater gill chloride cell development
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鲑鱼鱼苗在海水中生长更快，表现出更高的 GH/IGF 轴活性、更高的 Na、K-ATP 酶活性以及更强的鳃氯细胞发育
DOI：
10.1016/j.aquaculture.2010.10.035
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发表时间：
2012
期刊：
影响因子：
4.5
通讯作者：
Iwata M
中科院分区：
文献类型：
--
作者：
Murakami J;Okada R;Sadamoto H;Kobayashi S;Mita K;Sakamoto Y;Yamagishi M;Hatakeyama D;Otsuka E;Okuta A;Sunada H;Takigami S;Sakakibara M;Fujito Y;Awaji M;Moriyama S;Lukowiak K;Ito E;Pierce AL;Iwata M
模拟孵化程序，在淡水(FW)和海水(SW)中饲养鲑鱼(Oncorhynchus Keta)鱼苗，以确定其对生长的影响。在49天和70天的两次实验中，SW组的鱼苗呈指数增长，而FW组的鱼苗则呈线性增长。适应水华49天的鱼苗在返回水华7天后存活良好。Sw组鳃Na+，K+-ATPase活性高于FW组。鳃细丝中氯细胞数量增多，体积变大。移植后14d，垂体生长激素(GH)基因表达水平升高。Sw组仔鱼肝脏和鳃中GH受体(GHR)和胰岛素样生长因子-I(IGF-I)的mRNA水平升高。
Chum salmon (Oncorhynchus keta) fry were reared in freshwater (FW), mimicking the hatchery enhancement program, and in seawater (SW) to determine the effect on growth. The fry groups in SW showed exponential growth, whereas those in FW grew in a linear manner in two experiments over 49 and 70days. Fry adapted to SW for 49days survived well after returning to FW for 7days. Gill Na+, K+-ATPase activity in the SW group was higher than that of the FW group. The chloride cells in gill filaments increased in number and developed larger in size in SW fry. Pituitary growth hormone (GH) mRNA levels increased 14days after transfer to SW. The mRNA levels of GH receptor (GHR) and insulin-like growth factor I (IGF-I) in the liver and gill increased in the fry reared in SW.