Limited adaptation to non-natal osmotic environments at high water temperature in euryhaline wanderer fishes.
Limited adaptation to non-natal osmotic environments at high water temperature in euryhaline wanderer fishes.
复制标题
广盐游走鱼在高水温下对非出生渗透环境的适应有限。
DOI：
10.1007/s10641-019-00940-0
复制
发表时间：
2020
影响因子：
1.4
通讯作者：
Otake T
中科院分区：
文献类型：
--
作者：
Nakamura M;Watanabe S;Kaneko T;Masuda R;Tsukamoto K;Otake T
通过逐渐转移实验，研究了淡水物种hakonensis和海洋物种schlegelii黑porgyAcanthopagrus在出生和非出生渗透环境中对高低温的适应能力。每个物种的两组，一组适应其出生的渗透环境，另一组适应非出生的渗透环境，暴露在逐渐变化的温度下。在高温条件下，两物种的血浆渗透压（Posm）接近环境水的渗透压，在非出生渗透环境中观察到高死亡率，而在出生渗透环境中观察到高死亡率。相比之下，没有明确的证据表明在低温条件下，两种植物的渗透调节能力在出生和非出生渗透环境中有所下降。这些鱼类在高温下对非出生渗透环境的有限适应表明，全球变暖可能会阻碍它们进入非出生栖息地。
Gradual transfer experiments were conducted to see whether Japanese daceTribolodon hakonensis(freshwater species) and Japanese black porgyAcanthopagrus schlegelii(marine species) could acclimate to high and low temperatures in natal and non-natal osmotic environments. Two groups of each species, one acclimated to their natal osmotic environment and the other to a non-natal osmotic environment, were exposed to gradual temperature changes. Under high temperature conditions, the plasma osmolality (Posm) of both species approached the osmolality of ambient water, and high mortality was observed in the non-natal osmotic environments but not in the natal osmotic environments. In contrast, there was no clear evidence that the osmoregulatory capacity of either species had declined under low temperature conditions in the natal and non-natal osmotic environments. Limited adaptation of these fishes to non-natal osmotic environments at high temperature suggests that global warming may impair their entry to non-natal habitats.