High mobility of the protandrous anemonefish Amphiprion frenatus:: nonrandom pair formation in limited shelter space
High mobility of the protandrous anemonefish Amphiprion frenatus:: nonrandom pair formation in limited shelter space
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DOI：
10.1007/s10228-004-0253-3
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发表时间：
2005-02-01
影响因子：
1.2
通讯作者：
Hattori, A
中科院分区：
文献类型：
--
作者：
Hattori, A
海葵鱼的早熟现象归因于随机配对的形成，这是由于它们在随机招募到孤立的宿主海葵后移动性有限所致。研究人员对海葵鱼 Amphiprion frenatus 的招募和运动与其群体结构和其寄主海葵在珊瑚礁上的空间分布进行了研究，海葵鱼栖息在孤立的单一寄主中，寄主间的运动很少见。幼虫往往会被招募到前居民消失的宿主中，这表明幼虫的招募不是随机的。在珊瑚大规模白化导致许多寄主死亡后，四分之一的珊瑚在三周内平均在寄主之间移动了 42 m，这表明它们的流动性可能很高。正常情况下的迁徙很少，可能是由于迁徙的效益较低。即使在运动之后，雌性也比宿主中的配偶大得多，而且体型较大的雌性倾向于与体型较大的雄性配对。尽管雌性的体型与其寄主的体型呈正相关，但雄性的体型却并非如此。建议单个寄主的大小不允许两条或更多的大型鱼共存，每对的大小组成受寄主大小的影响。一夫一妻制鱼类的早熟现象可能归因于在宿主有限的空间内非随机的配对形成。
Protandry in anemonefishes has been attributed to random pair formation, which results from their limited mobility after random recruitment to isolated host anemones. The recruitment and movement of the anemonefish Amphiprion frenatus were investigated in relation to its group structure and the spatial distribution of its host anemone on a coral reef, where it inhabits isolated single hosts and interhost movement is rare. A juvenile tended to be recruited to a host from which a former resident(s) had disappeared, indicating that larval recruitment is not random. After mass bleaching of corals during which many hosts died, a quarter of adults moved between hosts on average 42 m in 3 weeks, indicating that their mobility is potentially high. The few migrations under normal conditions were probably due to the low benefit of movements. Even after the movements, a female was much larger than her mate in a host, and a large female tended to pair with a large male. Although body size of females was positively correlated with their host size, that of males was not. It is suggested that the size of a single host does not allow the coexistence of two or more large fish, and the size composition of each pair is affected by the host size. Protandry in the monogamous fish may be attributed to the nonrandom pair formation in the limited space of a host.