Effect of Salinity on Cold Tolerance of Juvenile Blue Tilapias
Effect of Salinity on Cold Tolerance of Juvenile Blue Tilapias
复制标题
DOI：
10.1577/1548-8659(1989)118
复制
发表时间：
1989-11
影响因子：
1.4
通讯作者：
A. Zale;R. W. Gregory
中科院分区：
文献类型：
--
作者：
A. Zale;R. W. Gregory
在实验室里，通过降低温度1℃/d直到鱼死亡，测定了罗非鱼幼鱼在盐度为0-35%o时的耐寒性。保持在等渗介质(11.6%o)中的鱼比在高盐度或低盐度水中的鱼在较低的温度下存活。因此，可以预计这种外来物种在北美的潜在范围将延伸到河口生境的最北端。由于蓝色罗非鱼在淡水和等渗介质中的耐热性差异很小(约1℃)，因此额外的生存范围也可能相对较小。
Abstract Cold tolerances of juvenile blue tilapias Oreochromis aureus at salinities ranging from 0 to 35%o were determined in the laboratory by decreasing temperatures 1°C/d until fish died. Fish maintained in isosmotic media (11.6%o) survived at lower temperatures than those in water ofhigher or lower salinity. Therefore, the potential range of this exotic species in North America can be expected to extend farthest north in estuarine habitats. Inasmuch as the difference in thermal tolerance between blue tilapias in fresh water and those in isosmotic media was small (about 1°C), the additional habitable range may also be relatively small.