Evolution and determinants of host specificity in the genus Lamellodiscus (Monogenea)
Evolution and determinants of host specificity in the genus Lamellodiscus (Monogenea)
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DOI：
10.1046/j.1095-8312.2002.00114.x
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发表时间：
2002-12-01
影响因子：
1.9
通讯作者：
Legendre, P
中科院分区：
文献类型：
--
作者：
Desdevises, Y;Morand, S;Legendre, P
研究了单殖吸虫属寄主专一性的进化及其决定因素。对已知的20种地中海鱼类进行了研究，均为鱼类寄生虫科(真骨目)。定义了一个考虑到其鱼类宿主物种的系统发育关系的特异性指数。在系统发育的背景下，使用独立对比的方法研究了特异性和其潜在决定因素之间的联系。寄主专一性似乎受到系统发育的高度制约，但也与寄主大小有关。将特异性映射到寄生虫系统发育树上表明，专业物种并不代表进化的死胡同，专业化也不是一种派生条件。这是假设，通才或专家的能力是由固有的，系统发育相关的特征控制的，专家物种倾向于使用大宿主，这可能是更可预测的。(C)2002年伦敦林尼安协会。
The evolution and determinants of host specificity in Lamellodiscus species (Monogenea, Diplectanidae) were investigated. The 20 known Mediterranean species were studied, all parasites of fishes from the family Sparidae (Teleostei). An index of specificity, which takes into account the phylogenetic relationships of their fish host species, was defined. The link between specificity and its potential determinants was investigated in a phylogenetic context using the method of independent contrasts. Host specificity in Lamellodiscus species appeared to be highly constrained by phylogeny, but also linked to host size. Mapping specificity onto the parasite phylogenetic tree suggests that specialist species do not represent an evolutionary dead end, and that specialization is not a derived condition. It is hypothesized that the ability to be generalist or specialist in Lamellodiscus is controlled by intrinsic, phylogenetically-related characteristics, and that specialist species tend to use large hosts, which may be more predictable. (C) 2002 The Linnean Society of London.