期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 99, 期 23, 页码 14884-14886出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.162339699
关键词
sex ratio; precocious sperm storage; allocation trade-off; hermaphroditism
Young colonies of the bryozoan Celleporella hyalina are capable of acquiring water-borne allosperm and of using it to fertilize ova for a period of 3-6 weeks after reaching female sexual maturity. In these simultaneous hermaphrodites, early allocation to female modules, but not male, is greatly enhanced by the acquisition of allosperm. The degree of enhancement is inversely proportional to coancestry of the recipient and donor colonies, thus promoting outcrossing. This apparently novel mechanism of adjusting operational sex ratio depends on the uptake and storage of sperm by nonreproductive (somatic) modules and subsequent translocation to females.
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