Morphological and molecular differentiation between three allopatric populations of the littoral crab Pachygrapsus transversus (Gibbes, 1850) (Brachyura: Grapsidae)
Morphological and molecular differentiation between three allopatric populations of the littoral crab Pachygrapsus transversus (Gibbes, 1850) (Brachyura: Grapsidae)
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DOI：
10.1080/00222939800771031
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发表时间：
1998-10-01
影响因子：
0.8
通讯作者：
Schubart, CD
中科院分区：
文献类型：
--
作者：
Cuesta, JA;Schubart, CD
沿岸的蟹类物种Pachygrapsus transversus（Gibbes，1850）具有广泛的分布范围，从东太平洋到东大西洋和地中海。美洲大陆和大西洋被认为是浮游幼虫扩散的障碍。因此，来自东太平洋（巴拿马）、西大西洋（加勒比海）和东大西洋（西班牙）的螃蟹种群被认为是遗传隔离的。在16S线粒体DNA基因的DNA序列以及幼虫和成虫的形态测量和着色显着差异，这些人群之间被发现。与太平洋动物相比，大西洋两岸的种群之间更接近的遗传相似性表明，偶尔会发生跨大西洋的基因突变。
The littoral grapsid crab species Pachygrapsus transversus (Gibbes, 1850) has a wide distribution ranging from the eastern Pacific to the eastern Atlantic and Mediterranean. The American continent and the Atlantic Ocean are believed to act as barriers for dispersal of planktotrophic larvae. The crab populations studied, from the eastern Pacific (Panama), the western Atlantic (Caribbean), and the eastern Atlantic (Spain) were, therefore, assumed to be genetically isolated. Remarkable differences in DNA sequence of the 16S mt-DNA gene as well as in larval and adult morphometry and coloration were found between these populations. A closer genetic similarity between the amphi-Atlantic populations in comparison to the Pacific animals, suggests the occurrence of occasional gene how across the Atlantic Ocean.