Molecular assessment of the genetic integrity, distinctiveness and phylogeographic context of the Saltwater crocodile (Crocodylus porosus) on Palau
Molecular assessment of the genetic integrity, distinctiveness and phylogeographic context of the Saltwater crocodile (Crocodylus porosus) on Palau
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对帕劳咸水鳄（Crocodylus porosus）的遗传完整性、独特性和系统发育地理学背景进行分子评估
DOI：
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发表时间：
2007
影响因子：
2.2
通讯作者：
A. Caccone
中科院分区：
文献类型：
--
作者：
M. Russello;P. Brazaitis;J. Gratten;G. Watkins;A. Caccone
咸水鳄（Crocodylus porosus）是最大和分布最广的鳄鱼物种，因此具有特殊的保护和经济利益。与其分布区的其他部分类似，C。在过去的世纪，分布在帕劳共和国的白海豚经历了严重的种群下降，主要是由于商业狩猎和根除运动。此外，在1930年代，数千条没有记录的鳄鱼物种和来源被进口到帕劳，用于商业养殖目的，这可能会污染当地咸水鳄鱼的基因库。对在帕劳共和国收集的39个个体的分析显示，在苏拉威西岛、婆罗洲和澳大利亚采样的人群共有一个单一的线粒体DNA控制区单倍型。线粒体DNA的结果，在6个位点的微卫星基因型数据相结合，没有发现证据的特有帕劳C。porosus和可能引入的鳄鱼物种。没有证据表明在帕劳人口的遗传瓶颈，但一个多余的罕见等位基因被确定，间接表明最近的历史的混合物可能与引进非本地C。多孔的根据这些发现，Palauan C. porosus应包括在单一的ESU先前建立的所有咸水鳄恢复一个固定的，但地理分布广泛的单倍型。虽然帕劳C。尽管porosus相对于所有其他采样种群表现出显着的遗传分化，但目前有证据表明，种群的遗传完整性可能已因引入非本地咸水鳄而受到损害，因此无法将其划分为一个独特的管理单位。
The saltwater crocodile (Crocodylus porosus) is the largest and most broadly distributed crocodilian species, and thus is of special conservation and economic interest. Similar to other parts of its range throughout the Indo-Pacific, C. porosus distributed in the Republic of Palau have experienced a severe population decline over the past century primarily due to commercial hunting and eradication campaigns. In addition, several thousand crocodiles of undocumented species and origin were imported into Palau during the 1930’s for commercial farming purposes, potentially polluting the gene pool of the endemic saltwater crocodiles. Analysis of 39 individuals collected throughout the Republic of Palau revealed a single mitochondrial DNA control region haplotype shared by populations sampled in Sulawesi, Borneo and Australia. The mtDNA results, in combination with microsatellite genotypic data at six loci, detected no evidence for inter-specific hybridization between endemic Palauan C. porosus and potentially introduced Crocodylus species. There was no evidence for a genetic bottleneck in the Palauan population, however an excess of rare alleles was identified, indirectly suggesting a recent history of admixture potentially linked to introductions of non-native C. porosus. Following from these findings, Palauan C. porosus should be included in the single ESU previously established for all saltwater crocodiles given the recovery of a fixed, but geographically widespread haplotype. Although Palauan C. porosus exhibited significant genetic differentiation relative to all other sampled populations, it’s delineation as a distinct management unit is precluded at the present time by evidence that the genetic integrity of the population may have been compromised by the introduction of non-native saltwater crocodiles.
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影响因子：
3.3
作者：
Alan R. Templeton;K. Crandall;C. Sing
通讯作者：
Alan R. Templeton;K. Crandall;C. Sing
影响因子：
1.9
作者：
GUO, SW;THOMPSON, EA
通讯作者：
THOMPSON, EA
影响因子：
1.9
作者：
LOUIS, EJ;DEMPSTER, ER
通讯作者：
DEMPSTER, ER
DOI：
10.1073/pnas.94.17.9197
发表时间：
1997-08-19
影响因子：
11.1
作者：
Rannala, B;Mountain, JL
通讯作者：
Mountain, JL