Introduced Zacco platypus mate with native Opsariichthys evolans
53% of spawning events were interspecific mating and only 43% were between native Opsariichthys evolans mating pairs. The Zacco platypus male satellites might prefer to engage with Z. platypus, while O. evolans might engage by chance. However, introduced males of Z. platypus may be unable to recognize conspecific females. Meanwhile, introduced females of Z. platypus also have a mate choice preference for males of Z. platypus. Therefore, Z. platypus male hybridization might significantly reduce the successful mating ratio of O. evolans, leading to a dramatic reduction in native O. evolans offspring in the future.
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