Temperature-dependent sex determination in fish revisited: prevalence, a single sex ratio response pattern, and possible effects of climate change.
Temperature-dependent sex determination in fish revisited: prevalence, a single sex ratio response pattern, and possible effects of climate change.
复制标题
DOI：
10.1371/journal.pone.0002837
复制
发表时间：
2008-07-30
期刊：
影响因子：
3.7
通讯作者：
Piferrer F
中科院分区：
文献类型：
--
作者：
Ospina-Alvarez N;Piferrer F
在生殖分布的脊椎动物中，性别决定机制可以分为基因型（GSD）或温度依赖（TSD）。鱼类中的一些TSD病例受到质疑，但普遍的观点是TSD在这组动物中非常常见，对温度有三种不同的反应模式。我们分析了现场和实验室数据的59种鱼类的TSD已明确或暗示声称到目前为止。对于每一个物种，我们收集了性染色体存在或不存在的数据，并确定性比反应是否是在该物种在野外经历的温度下获得的。如果是这样，我们研究这种反应是否具有统计学意义。我们发现的证据表明，许多情况下，观察到的性别比例的变化，在响应温度揭示了热改变，否则占主导地位的GSD机制，而不是TSD的存在。我们还表明，在那些实际上有TSD的鱼类中，对温度升高的性比反应总是导致高度雄性偏向的性比，即使是1-2°C的微小变化也会显着改变淡水和海洋物种的性比，从1∶1（雄性∶雌性）到3∶1。我们证明，TSD在鱼类中的分布远不如目前认为的那样广泛，这表明TSD显然是鱼类性别决定的例外。此外，物种与TSD表现出只有一个一般的性比的反应模式，以温度。然而，一些鱼类种群的生存能力与TSD可能会受到损害，通过改变其性别比例作为对气候变化预测的幅度的温度波动的反应。
In gonochoristic vertebrates, sex determination mechanisms can be classified as genotypic (GSD) or temperature-dependent (TSD). Some cases of TSD in fish have been questioned, but the prevalent view is that TSD is very common in this group of animals, with three different response patterns to temperature. We analyzed field and laboratory data for the 59 fish species where TSD has been explicitly or implicitly claimed so far. For each species, we compiled data on the presence or absence of sex chromosomes and determined if the sex ratio response was obtained within temperatures that the species experiences in the wild. If so, we studied whether this response was statistically significant. We found evidence that many cases of observed sex ratio shifts in response to temperature reveal thermal alterations of an otherwise predominately GSD mechanism rather than the presence of TSD. We also show that in those fish species that actually have TSD, sex ratio response to increasing temperatures invariably results in highly male-biased sex ratios, and that even small changes of just 1–2°C can significantly alter the sex ratio from 1∶1 (males∶females) up to 3∶1 in both freshwater and marine species. We demonstrate that TSD in fish is far less widespread than currently believed, suggesting that TSD is clearly the exception in fish sex determination. Further, species with TSD exhibit only one general sex ratio response pattern to temperature. However, the viability of some fish populations with TSD can be compromised through alterations in their sex ratios as a response to temperature fluctuations of the magnitude predicted by climate change.
登录
查看更多内容
影响因子：
2.4
作者：
Craig, JK;Foote, CJ;Wood, CC
通讯作者：
Wood, CC
影响因子：
4.5
作者：
Bezault, Etienne;Clota, Frederic;Baroiller, Jean-Francois
通讯作者：
Baroiller, Jean-Francois
DOI：
10.1073/pnas.0701638104
发表时间：
2007-06-05
影响因子：
11.1
作者：
Biro, Peter A.;Post, John R.;Booth, David J.
通讯作者：
Booth, David J.
DOI：
10.1016/s1532-0456(01)00267-8
发表时间：
2001-12-01
影响因子：
3.9
作者：
Baroiller, JF;D'Cotta, H
通讯作者：
D'Cotta, H
影响因子：
2.4
作者：
BEAMISH, FW
通讯作者：
BEAMISH, FW