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Invasive mosquitofish (Gambusia holbrooki) affect egg-laying and behaviour of Spanish pygmy newts (Triturus pygmaeus)

Newts exposed to caged or free-swimming mosquitofish laid fewer eggs than newts not exposed to the invasive species, suggesting that chemical or visual cues alone were sufficient to alter the behaviour of gravid newts. Our results suggest that mosquitofish can reduce the reproductive success of native pygmy newts in the wild, highlighting the need for management efforts to mitigate this impact. Leer más.

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