The false limpet Siphonaria gigas, a simultaneous hermaphrodite, lives in pairs in rock fissures on the Pacific coast of Panama

Roberto C. Lombardo; John H. Christy; Roberto Cipriani

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The false limpet Siphonaria gigas, a simultaneous hermaphrodite, lives in pairs in rock fissures on the Pacific coast of Panama

机译：假Siphonaria gigas，同时雌雄同体，成对生活在巴拿马太平洋海岸的岩石裂缝中

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The pulmonate limpet Siphonaria gigas, a simultaneous hermaphrodite, lives in the mid- to upper-intertidal zone on rocky shores in the tropical Eastern Pacific. Samples along five transects taken in June-July, 2004, on Culebra Point (8°54'N to 79°31'W), Republic of Panama, showed that 71 % of the population occurred in fissures, a significant preference for this habitat. Of 200 adults in 27 fissures, 150 lived side by side in pairs with their shells touching or nearly so, a significant deviation from the number of pairs expected given a random arrangement. Pair frequency did not increase with limpet density suggesting pairing was not an incidental consequence of crowding. Pair living was unknown in the genus Siphonaria, and is very uncommon among simultaneous hermaphrodites. Reproductive synchrony and restrictions on movement due to predation and environmental stress may limit opportunities for encountering and mating with multiple partners favoring pair living in S. gigas.

机译：肺Siphonaria gigas，同时雌雄同体，生活在热带东太平洋多岩石海岸的中上潮间带。 2004年6月至7月，在巴拿马共和国库莱布拉角（西纬8°54'至西经79°31'）上沿五个样带采集的样本显示，该地区有71％的人口生活在裂隙中，这是该生境的显着优势。在27个裂隙中的200个成年动物中，有150个成对并排成对生活，它们的壳接触或接近，几乎成对排列，这与随机排列的预期成对数目有很大差异。配对频率没有随帽贝密度增加而增加，这表明配对不是拥挤的偶然结果。配对生活在虹吸管属中是未知的，并且在同时的雌雄同体中非常罕见。由于掠食和环境压力而导致的生殖共生和行动受限，可能会限制与生活在巨型链球菌中的成对伴侣的多个伴侣相遇和交配的机会。

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《Marine biology》 |2013年第3期|729-735|共7页
作者
Roberto C. Lombardo; John H. Christy; Roberto Cipriani;
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Department of Marine Biology and Biodiversity, Graduate School of Fisheries Sciences, Hokkaido University, 3-1-1 Minato, Hakodate 041-8611, Hokkaido, Japan;

Smithsonian Tropical Research Institute, Balboa, Ancon, Apartado 0843-03092, Panama, Repiiblica de Panama;

Department of Biological Science, California State University Fullerton, P.O. Box 6850, Fullerton, CA 92834-6850, USA;

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The false limpet Siphonaria gigas, a simultaneous hermaphrodite, lives in pairs in rock fissures on the Pacific coast of Panama

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