ABSTRACT The Masked Booby is a highly vagile, pantropical seabird of which up to six subspecies have been recognised: S. d. dactylatra, S. d. californica, S. d. personata, S. d. melanops, S. d. bedouti and S. d. tasmani. The genetic distinction of several S. dactylatra colonies has been previously investigated, but this has not yet been conducted for the Bedout Island population in Western Australia, which has been considered by some to be part of a distinct subspecies. Suspected population decline on Bedout Island has renewed interest in determining the extent to which genetic novelty might be threatened. To answer this question, morphological and mitochondrial control region sequence variation were used to determine the distinction of the Bedout Island population. Whereas the morphological measures were equivocal, six haplotypes were identified from 31 individuals, none of which were shared by individuals previously sampled from the Indo-Pacific. The Bedout Island haplotypes were most closely related to other haplotypes found in a distinct Indian Ocean haplogroup, but haplotype frequencies at Bedout Island differed significantly from all other. This indicates that the Bedout Island population rarely exchanges mitochondrial genes with any of the other Masked Booby colonies presently studied, which may reflect dependence on local recruitment for its persistence.

中文翻译：

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西澳大利亚贝多岛上的蒙面鲣鸟（Sula dactylatra）的遗传特征

摘要 蒙面鲣鸟是一种高度灵活的泛热带海鸟，其中多达六个亚种已被确认：S. d. dactylatra, S. d. 加利福尼亚州，S. d. 人格，S. d. 梅拉诺普斯，S. d. Bedouti 和 S. d. 塔斯马尼 之前已经研究了几个 S. dactylatra 群体的遗传差异，但尚未对西澳大利亚的贝多岛种群进行过研究，有人认为该种群是不同亚种的一部分。Bedout Island 上可疑的人口下降重新引起了人们对确定遗传新颖性可能受到威胁的程度的兴趣。为了回答这个问题，使用形态学和线粒体控制区序列变异来确定 Bedout Island 种群的区别。虽然形态测量是模棱两可的，从 31 个个体中鉴定出 6 个单倍型，其中没有一个与先前从印度-太平洋地区采样的个体共享。Bedout Island 单倍型与在不同印度洋单倍群中发现的其他单倍型最密切相关，但 Bedout Island 的单倍型频率与所有其他单倍型有显着差异。这表明 Bedout Island 种群很少与目前研究的任何其他 Masked Booby 群体交换线粒体基因，这可能反映了其持久性依赖于当地招募。但是 Bedout Island 的单倍型频率与其他所有地区都有显着差异。这表明 Bedout Island 种群很少与目前研究的任何其他 Masked Booby 群体交换线粒体基因，这可能反映了其持久性依赖于当地招募。但是 Bedout Island 的单倍型频率与其他所有地区都有显着差异。这表明 Bedout Island 种群很少与目前研究的任何其他 Masked Booby 群体交换线粒体基因，这可能反映了其持久性依赖于当地招募。