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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/46133

Title: The origins and evolution of dwarf males and habitat use in thoracican barnacles
Authors: Lin HC
Høeg JT
Yusa Y
Chan BK
Contributors: 國立臺灣海洋大學:海洋生物研究所
Keywords: Sexual system
Dwarf male
Morphological diversity
Date: 2015
Issue Date: 2018-05-02T08:40:07Z
Publisher: Mol Phylogenet Evol.
Abstract: Abstract: Barnacles are exceptional in having various sexual systems (androdioecy, hermaphroditism, dioecy) and with a high morphological diversity of males, though these are always minute (dwarf) compared to their female or hermaphrodite partners. For the first time, we use a multiple DNA marker-based phylogeny to elucidate the ancestral states and evolution of (1) dwarf males, (2) their morphology when present, (3) their attachment site on the partner, and (4) habitat use in thoracican barnacles. Our taxon sampling was especially rich in rare deep-sea Scalpelliformes and comprised species with diverse sexual systems and dwarf male morphologies. Within the thoracican barnacles dwarf male evolution is subject to extensive convergence, but always correlated to similar ecological conditions. Males evolved convergently at least four times from purely hermaphroditic ancestors, in each case correlated with the invasion into habitats with low mating group sizes. The independent evolution of dwarf males in these lineages dovetails with the males having different morphologies and occurring in several different locations on their sexual partner.
Relation: 91 pp1-11
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/46133
Appears in Collections:[海洋生物研究所] 期刊論文

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