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Selfing in a malacostracan crustacean: why a tanaidacean but not decapods
Title: | Selfing in a malacostracan crustacean: why a tanaidacean but not decapods |
Authors: | Kakui, Keiichi Browse this author →KAKEN DB | Hiruta, Chizue Browse this author |
Keywords: | Crustacea | Malacostraca | Tanaidacea | Apseudes | Self-fertilization | Hermaphroditism |
Issue Date: | Sep-2013 |
Journal Title: | Naturwissenschaften |
Volume: | 100 |
Issue: | 9 |
Start Page: | 891 |
End Page: | 894 |
Publisher DOI: | 10.1007/s00114-013-1079-5 |
PMID: | 23846305 |
Abstract: | The crustacean class Malacostraca,with over 22,000 species, includes commercially important members, such as crabs, shrimps, and lobsters. A few simultaneous hermaphrodites are known in this group, but self-fertilization was unknown. Here we show, through microscopy and breeding experiments, that the simultaneously hermaphroditic malacostracan Apseudes sp. (order Tanaidacea) can self-fertilize; individuals reared in isolation become hermaphroditic via a male-like phase and produce eggs that develop into fertile adults. Although selfing occurs in crustaceans like the Branchiopoda, in which simultaneous hermaphrodites have the sex ducts united, in decapods the separation of gonadal ducts and gonopores, specialized mating organs, and complex mating behavior appear to have constrained the evolution of selfing. In contrast, in most tanaidaceans, sperm is released externally by a male and reaches the eggs in the female brood pouch, where fertilization occurs. This mode of fertilization permitted Apseudes sp. to achieve selfing without large modifications in morphology or behavior. |
Rights: | The final publication is available at link.springer.com |
Type: | article (author version) |
URI: | http://hdl.handle.net/2115/66188 |
Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 角井 敬知
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