Heuschele Jan, Candolin Ulrika
Department of Biological and Environmental Sciences, University of Helsinki, PO Box 65, Helsinki 00014, Finland.
Biol Lett. 2007 Aug 22;3(4):411-3. doi: 10.1098/rsbl.2007.0141.
Human-induced eutrophication is a serious environmental problem that constrains visual communication and influences the mate choice process in fishes. Eutrophication also changes the chemical environment and the pH of the water, which could influence the use of olfactory cues in mate choice. Here, we show that an increase in pH enhances the use of male olfactory cues in mate choice in three-spined sticklebacks, Gasterosteus aculeatus. In a laboratory choice experiment, gravid females were more attracted to male olfactory cues when pH was raised. This could compensate for impaired visual communication in eutrophied waters and facilitate adaptive mate choice.
人为导致的富营养化是一个严重的环境问题，它限制了视觉交流，并影响鱼类的配偶选择过程。富营养化还会改变水的化学环境和pH值，这可能会影响配偶选择中嗅觉线索的使用。在这里，我们表明，pH值的升高增强了三刺鱼（Gasterosteus aculeatus）在配偶选择中对雄性嗅觉线索的利用。在一项实验室选择实验中，当pH值升高时，怀孕的雌性对雄性嗅觉线索更感兴趣。这可以弥补富营养化水域中视觉交流受损的问题，并促进适应性配偶选择。
