Occurrence of natural hybrid between pufferfishes, Takifugu xanthopterus and T. vermicularis, in Ariake Bay, Kyushu, Japan
Occurrence of natural hybrid between pufferfishes, Takifugu xanthopterus and T. vermicularis, in Ariake Bay, Kyushu, Japan
复制标题
日本九州有明湾河豚、Takifugu xanthopterus 和 T. vermularis 之间自然杂交的出现
DOI：
10.2331/suisan.57.1247
复制
发表时间：
1991
影响因子：
0.4
通讯作者：
K. Matsuura
中科院分区：
文献类型：
--
作者：
Y. Masuda;N. Shinohara;Yasuhiro Takahashi;O. Tabeta;K. Matsuura
对1985年和1986年在日本九州有明湾采集的6种东方鲀进行了形态学和酶消化学的研究。电泳分析表明，这些样品是T. xanthopterus和T.蠕虫，因为他们是杂合的有一个等位基因从T。xanthopterus和T.蠕虫在所有八个诊断位点。形态学观察结果表明，杂种的五个分裂性状的平均值介于亲本之间，杂种指数为16.7 ~ 73.3，平均值为44.4;（B）从3个分生型和7个形态计量学的值中提取的第一主成分（PC 1）可清楚地分离T。vermicularis从T. xanthopterus，与位于它们之间的杂交种;和（c）着色和身体刺的杂交种之间的亲种。杂交发生率很低（0.4%），与其他一些海洋鱼类的记录相同。
Six unidentifiable pufferfishes of the genus Takifugu collected in Ariake Bay, Kyushu, Japan in 1985 and 1986, were examined enzyme electrophoretically and morphologically. Electrophoretic analysis showed these specimens to be natural F1 hybrids between T. xanthopterus and T. vermicularis, since they were heterozygous of having one allele from T. xanthopterus and another from T. vermicularis at all the eight diagnostic loci. Morphological examinations showed intermediacy of the hybrid specimens, and supported the findings of the electrophoretic analysis: (a) mean values of five meristic characters of the hybrids fell between those of the parental species, hybrid indices ranging from 16.7 to 73.3, with a mean of 44.4; (b) the first principal component (PC1) extracted from the values for three meristics and seven morphometrics clearly separated T. vermicularis from T. xanthopterus, with the hybrids situated between them; and (c) coloration and body prickles of the hybrids were intermediate between those of the parent species. The incidence of hybridiza-tion was quite low (0.4%), as recorded for some other marine fishes.