Genetic composition of a green turtle (Chelonia mydas) feeding ground population:: evidence for multiple origins
Genetic composition of a green turtle (Chelonia mydas) feeding ground population:: evidence for multiple origins
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DOI：
10.1007/s002270050254
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发表时间：
1998-02-01
期刊：
影响因子：
2.4
通讯作者：
Bowen, BW
中科院分区：
文献类型：
--
作者：
Lahanas, PN;Bjorndal, KA;Bowen, BW
迁徙海龟在觅食和筑巢区之间极难追踪，幼年和成年海龟栖息地之间的联系一般也不清楚。为了评估的饲养场（FG）人口的少年绿色海龟（Chelonia mydas Linnaeus）的组成，线粒体DNA控制区序列进行了检查，在1992年9月从大伊纳瓜，巴哈马采样的80个后远洋个体（直甲壳长度= 31至67厘米），并与来自9个大西洋和地中海筑巢殖民地的194个人。遗传标记，单倍型频率和最大似然（ML）分析的证据是一致的，表明多个殖民地有助于巴哈马FG人口。ML分析表明，大多数巴哈马FG青少年起源于西部（79.5%）和东部（12.9%）加勒比地区，这些比例大致相当于候选rookeries的大小。这些数据支持一个生命周期模型，其中个人成为汇集在孵化后（远洋）和少年（底栖）生境的洋流和移动之间的FGs的结果。大量收获未成熟的海龟在他们的饲养牧场将影响繁殖成功的贡献筑巢人口在广泛的地理范围。
Migratory marine turtles are extremely difficult to track between their feeding and nesting areas, and the link between juvenile and adult habitats is generally unknown. To assess the composition of a feeding ground (FG) population of juvenile green turtles (Chelonia mydas Linnaeus), mitochondrial DNA control region sequences were examined in 80 post-pelagic individuals (straight carapace length = 31 to 67 cm) sampled in September 1992 from Great Inagua, Bahamas, and compared to those of 194 individuals from nine Atlantic and Mediterranean nesting colonies. Evidence from genetic markers, haplotype frequencies, and maximum likelihood (ML) analyses are concordant in indicating that multiple colonies contribute to the Bahamian FG population. ML analyses suggested that most Bahamian FG juveniles originated in the western (79.5%) and eastern (12.9%) Caribbean regions, and these proportions are roughly comparable to the size of candidate rookeries. These data support a life-cycle model in which individuals become pooled in post-hatchling (pelagic) and juvenile (benthic) habitats as a consequence of ocean currents and movement among FGs. A substantial harvest of immature turtles on their feeding pastures will influence the reproductive success of contributing nesting populations over a wide geographic scale..