The California killifish, Fundulus parvipinnis, is a marine species that lives in salt marshes, estuaries and wetlands along the California and Baja California coasts. In order to estimate levels of dispersal between different coastal habitats over its range, we have studied six populations using morphological and genetic markers. Lateral line scale and vertebrae counts showed significant differences between individuals collected north of Punta Eugenia and south of Punta Eugenia. Morphological differences across Punta Eugenia were accompanied by large genetic differences at the mitochondrial control region (5.8%). Gene flow was in general very reduced over the range of the species (pairwise average F(st)=0.70, Nm=0.30), with a strong break at Punta Eugenia (F(st)=0.95, Nm=0.03). Such limited interchanges between coastal habitats have important theoretical and conservation implications.

译文

:加利福尼亚州的鱼类,Fundulus parvipinnis,是一种海洋生物,生活在加利福尼亚州和下加利福尼亚州沿海的盐沼,河口和湿地中。为了估计在其范围内不同沿海生境之间的扩散水平,我们使用形态和遗传标记研究了六个种群。侧线鳞片和椎骨计数显示在蓬塔尤金尼亚北部和蓬塔尤金尼亚南部收集的个体之间存在显着差异。整个蓬塔欧尼亚地区的形态学差异都伴随着线粒体控制区的较大遗传差异(5.8%)。一般而言,在整个物种范围内,基因流量都大大减少了(成对平均F(st)= 0.70,Nm = 0.30),在蓬塔尤金尼亚州有一个强力突破(F(st)= 0.95,Nm = 0.03)。沿海生境之间的这种有限的交流具有重要的理论和保护意义。

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