Plasticity in size and age at maturity in a monogamous fish : effect of host coral size and frequency dependence

作者: T. Kuwamura , Y. Nakashima , Y. Yogo

DOI: 10.1007/S002650050253

关键词: CoralCnidariaStylophora pistillataSexual maturityBiologyCoelenterataReproductive successStylophora (coral)EcologyAnimal ecology

摘要: The number and maximum body size of the gobioid fish, Paragobiodon echinocephalus, increase with its obligate host coral, Stylophora. Only largest two individuals breed monogamously in each coral head, reproductive success spawning is positively correlated size. In this study, plasticity age at maturity P. echinocephalus was examined. We analyzed life history data from gobies 15–20 mm TL (total length) their initial marking. Gobies found larger corals were lower rank order began to later a size, usually upon moving other corals. ranged widely 17.2 36.0 TL. After maturation, growth rates decreased. Mortality, however, not affected by timing maturation. did affect mortality marked but rate juveniles prior marking appeared be higher smaller estimated lifetime differ between inhabiting different Thus species may maintained frequency-dependent selection choosing that affects an individual’s social status.

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