Abstract
Two sister species of Chaoborus exist in Europe. They are found in two distinct habitats that differ strongly in habitat persistence time. Chaoborus flavicans is found primarily in lakes inhabited by fish, whereas Chaoborus crystallinus is found exclusively in small ponds without fish. Chaoborus flavicans has evolved an adaptive response to predatory fish. In the presence of fish chemicals it can migrate vertically in the water column and can thus avoid predation. Chaoborus flavicans can therefore coexist with fish. Chaoborus crystallinus avoids oviposition into water bodies that are inhabited by fish and hence lives only in small fish-free ponds. These differences lead to several testable hypotheses: (1) The extinction risk of local populations of C. crystallinus is higher than that for C. flavicans. (2) C. crystallinus has a higher dispersal probability than C. flavicans. (3) The spatial population structure of each species differ. The results from a 3-yr population survey verified the first hypothesis ...
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
