GROWTH-HORMONE AND THYROID-HORMONES DURING ATLANTIC SALMON, SALMO-SALAR L, SMOLTING, AND AFTER TRANSFER TO SEAWATER
GROWTH-HORMONE AND THYROID-HORMONES DURING ATLANTIC SALMON, SALMO-SALAR L, SMOLTING, AND AFTER TRANSFER TO SEAWATER
复制标题
DOI：
10.1016/0044-8486(89)90413-4
复制
发表时间：
1989-11-01
期刊：
影响因子：
4.5
通讯作者：
PRUNET, P
中科院分区：
文献类型：
--
作者：
BOEUF, G;LEBAIL, PY;PRUNET, P
在两个不同年份的实验中，幼年鲑鱼 (Salmo salarL.) 的鳃 (Na+K+)-ATP 酶活性从 2 月到 4 月底“典型地”增加，并且在转移到海水之前其水平与海水性能（存活率、血浆渗透压和血浆氯化物水平）直接相关。甲状腺素 (T4) 激增发生在鳃酶水平达到峰值之前 2-3 周。 T4峰值后，鱼明显呈广盐性，但T4水平与海水适应性无关。在激增后至少1个月内，它们仍然能够快速适应海水。当鱼在淡水中时，三碘甲状腺原氨酸 (T3) 发生了两次显着增加：转移到海水中要么降低了 T3 和 T4，要么没有影响。在淡水中，血浆生长激素 (GH) 水平随着 T3 峰值急剧上升，即鳃 ATP 酶活性峰值前 2 周。转移到海水中后GH显着增加，并在7-10天内保持高水平，并在14天后恢复到基础水平。 GH 似乎在小鲑鱼和海水适应中发挥着重要作用。
Gill (Na+K+)-ATPase activity of juvenile salmon,Salmo salarL., increased “classically” from February to the end of April in experiments in two different years, and its level before transfer to seawater was correlated directly with seawater performance (survival, plsma osmotic pressure and plasma chloride levels). A thyroxine (T4) surge occurred 2–3 weeks before the peak of gill enzyme levels. After the T4 peak the fish were clearly euryhaline, but T4 levels were not correlated with seawater adaptability. They remained able to adapt rapidly to seawater for at least 1 month after the surge. Two significant increases of tri-iodothyronine (T3) occurred while the fish were in freshwater: transfer to seawater either decreased T3 and T4 or had no effect. In freshwater, plasma growth hormone (GH) levels rose sharply concomitant with the T3 peak, 2 weeks before peak gill ATPase activity. After transfer to seawater GH increased significantly, remaining high for 7–10 days, and returning to base levels after 14 days. GH appeared to play a major role in smolting and seawater adaptation.