Abstract
Even when provided with abundant food and grown in isolation, Daphnia magna from arctic Canada responds to declining photoperiods by producing male and then ephippial offspring. In contrast, clones of English origin do not alter their reproductive behaviour when exposed to photoperiod shifts. Hybrid clones show an intermediate response in terms of ephippial egg production, but a variable response in male production. The results indicate that variation exists at gene loci controlling sexual behaviour in local populations as well as between distant populations. The significance of this variation is discussed in relation to the environmental heterogeneity encountered by D. magna over its extensive range.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.