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Selfing in a malacostracan crustacean: why a tanaidacean but not decapods

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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)

Submitter: 角井 敬知

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