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首页> 外文期刊>Marine biology >Population differentiation of the Atlantic spotted dolphin (Stenella frontalis) in the western North Atlantic, including the Gulf of Mexico
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Population differentiation of the Atlantic spotted dolphin (Stenella frontalis) in the western North Atlantic, including the Gulf of Mexico

机译：大西洋斑点海豚（Stenella frontalis）在北大西洋西部（包括墨西哥湾）的种群分化

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Information about the genetic population structure of the Atlantic spotted dolphin [Stenella fron-talis (G. Cuvier 1829)] in the western North Atlantic would greatly improve conservation and management of this species in USA waters. To this end, mitochondrial control region sequences and five nuclear microsatellite loci were used to test for genetic differentiation of Atlantic spotted dolphins in the western North Atlantic, including the Gulf of Mexico (n = 199). Skin tissue samples were collected from 1994-2000. Significant heterozygote deficiencies in three microsatellite loci within samples collected off the eastern USA coast prompted investigation of a possible Wahlund effect, resulting in evidence for previously unsuspected population subdivision in this region. In subsequent analyses including three putative populations, two in the western North Atlantic (n = 38, n = 85) and one in the Gulf of Mexico (n = 76), significant genetic differentiation was detected for both nuclear DNA (R_(ST) = 0.096, P ≤ 0.0001) and mitochondrial DNA (Φ_(ST) = 0.215, P ≤ 0.0001), as well as for all pair-wise population comparisons for both markers. This genetic evidence for population differentiation coupled to known biogeo-graphic transition zones at Cape Hatteras, North Carolina and Cape Canaveral, Florida, USA, evidence of female philopatry, and preliminary support for signifi- cant genetic differences between previously documented morphotypes of Atlantic spotted dolphins in coastal and offshore waters all indicate that the biology and life history of this species is more complex than previously assumed. Assumptions of large, panmictic populations might not be accurate in other areas where S. frontalis is continuously distributed (e.g., eastern Atlantic), and could have a detrimental effect on long-term viability and maintenance of genetic diversity in this species in regions where incidental human-induced mortality occurs.
机译：有关北大西洋西部大西洋斑点海豚[Stenella fron-talis（G. Cuvier 1829）]的遗传种群结构的信息将大大改善该物种在美国水域的保护和管理。为此，线粒体控制区序列和五个核微卫星基因座被用于测试包括墨西哥湾在内的北大西洋西部的大西洋斑海豚的遗传分化（n = 199）。从1994-2000年收集皮肤组织样品。在美国东部海岸附近采集的样品中的三个微卫星基因座中明显存在杂合子缺陷，这促使人们对可能的沃伦德效应进行了调查，从而为该地区以前未曾怀疑的种群细分提供了证据。在随后的分析中，包括三个假定的种群，两个在北大西洋西部（n = 38，n = 85），一个在墨西哥湾（n = 76），两个核DNA（R_（ST） = 0.096，P≤0.0001）和线粒体DNA（Φ_（ST）= 0.215，P≤0.0001），以及两个标记的所有成对群体比较。人口分化的遗传证据与美国佛罗里达州北卡罗来纳州哈特拉斯角和美国佛罗里达州卡纳维拉尔角的已知生物地理图形过渡带相结合，是女性哲学的证据，并为先前发现的大西洋斑海豚形态学之间的显着遗传差异提供了初步支持。在沿海和近海水域，都表明该物种的生物学和生活史比以前设想的要复杂。在额叶链球菌连续分布的其他地区（例如，东部大西洋），大量的恐慌性种群的假设可能不准确，并且可能对该物种长期存在的地区以及该物种的遗传多样性的长期生存和维持产生不利影响。人为死亡的发生。

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