Ontogenetic variation in fin ray segmentation between latitudinal populations of the medaka, Oryzias latipes
Ontogenetic variation in fin ray segmentation between latitudinal populations of the medaka, Oryzias latipes
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青鳉、Oryzias latipes 纬度种群之间鳍条分割的个体发育变异
DOI：
10.1007/s10641-011-9839-6
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发表时间：
2011
影响因子：
1.4
通讯作者：
Yamahira K
中科院分区：
文献类型：
--
作者：
Kawajiri M;Yamahira K
鳍鳍鱼的鳍条由多个骨节组成，每个鳍条通过在尖端增加一个新的节而延长。因此，鳍条的长度是由线段的数量和每个线段的长度决定的。对青鳉（Oryzias latipes）的北方和南方野生种群的臀鳍鳍条进行比较，发现南方鱼的每个鳍条有更多的节，导致臀鳍比北方鱼更长。当鱼饲养在一个实验室共同的环境中，分割的鳍条开始早于南方鱼的身体大小。此外，在南方雄性中，体节增加的速度在一定的身体尺寸后加快，表明性成熟。个体发育过程中，这些模式的节添加与鳍射线伸长的模式是一致的。虽然远段往往是较长的，除了最近的段，在这两个群体中，南部的鱼比北方鱼在鳍条的任何位置的段较短。这些结果表明，种群间鳍长的变化主要是由于遗传基础的差异，在控制段添加，并且每个段的长度并不有助于它。我们怀疑，鳍射线分割是由甲状腺和性激素，不同种群之间的调节。我们还发现，在每条鳍条的基部，有些节相互融合，其功能和机制尚不清楚。
Fin rays of ray-finned fishes are composed of multiple bony segments, and each fin ray elongates by adding a new segment to the tip. Therefore, fin ray length is determined by the number of segments and the length of each segment. A comparison of the anal fin rays of a northern and southern wild population of the medaka,Oryzias latipes, revealed that southern fish had more segments per fin ray, resulting in longer anal fins than the northern fish. When fish were reared in a laboratory common environment, segmentation of the fin rays started earlier with respect to body size in the southern fish. In the southern males, moreover, the rate of segment addition accelerated after a certain body size, indicating sexual maturity. These patterns of segment addition during ontogeny were consistent with the patterns of fin ray elongation. Although distal segments tended to be longer, except for the most proximal segment, in both populations, the southern fish had shorter segments than the northern fish at any position on fin rays. These results indicate that the interpopulation variation in fin length is largely due to genetically-based differences in the control of segment addition, and that the length of each segment does not contribute to it. We suspect that fin ray segmentation is regulated by thyroid and sex hormones that differ between populations. We also found that some segments fuse with each other at the base of each fin ray, the functions and mechanisms of which remain unclear.
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臀鳍在雄性青鳉 Oryzias latipes 受精成功中的作用
影响因子：
1.9
作者：
Y. Koseki;K. Takata;K. Maekawa
通讯作者：
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甲状腺素和硫脲对真鲷幼体发育的影响
DOI：
--
发表时间：
1989
期刊：
影响因子：
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作者：
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通讯作者：
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影响因子：
16.8
作者：
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通讯作者：
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影响因子：
3.3
作者：
Yamahira, Kazunori;Kawajiri, Maiko;Irie, Takahiro
通讯作者：
Irie, Takahiro
DOI：
10.1016/j.expthermflusci.2016.11.020
发表时间：
2017-04-01
影响因子：
3.2
作者：
Huang, Guanghan;Yuan, Wei;Lu, Longsheng
通讯作者：
Lu, Longsheng