Department of Biological Sciences, California State University, Long Beach, 1250 Bellflower Blvd., Long Beach, CA 90840-3702, USA.
J Fish Biol. 2010 Aug;77(2):329-40. doi: 10.1111/j.1095-8649.2010.02677.x.
The round stingray, Urobatis halleri, is a viviparous elasmobranch that inhabits inshore, benthic habitats ranging from the western U.S.A. to Panama. The population genetic structure of this species was inferred with seven polymorphic microsatellite loci in samples collected at three sites in coastal southern California, one near Santa Catalina Island, California and one in the eastern Gulf of California. Urobatis halleri is relatively common, but little is known of its movement patterns or population structure. Small F(ST) values (-0.0017 to 0.0005) suggested little structure among coastal populations of southern and Baja California. The population sampled at Santa Catalina Island, which is separated by a deep-water channel from the coastal sites, however, was significantly divergent (large F(ST), 0.0251) from the other populations, suggesting low connectivity with coastal populations. The Santa Catalina Island population also had the lowest allele richness and lowest average heterozygosity, suggesting recent population bottlenecks in size.
圆斑星鲨，Urobatis halleri，是一种胎生的软骨鱼，栖息在美国西部到巴拿马的近岸海底栖息地。在加利福尼亚州南部沿海的三个地点采集的样本中，使用七个多态性微卫星基因座推断了该物种的种群遗传结构，其中一个位于加利福尼亚州圣卡塔利娜岛附近，另一个位于加利福尼亚湾东部。圆斑星鲨相对常见，但对其运动模式或种群结构知之甚少。小的 F(ST) 值（-0.0017 至 0.0005）表明，南加利福尼亚和下加利福尼亚的沿海种群之间结构很少。然而，与沿海种群相比，在圣卡塔利娜岛采集的样本（与沿海地点由深水区隔开）的差异非常大（F(ST) 大，为 0.0251），表明与沿海种群的连通性较低。圣卡塔利娜岛种群的等位基因丰富度和平均杂合度也最低，表明其种群规模最近经历了瓶颈。
