Abstract
Seven populations of Gambusia holbrooki in seven different locations, showing different physical characteristics, were sampled periodically for over 1 year. Population density differed across locations and seasons. It varied widely during the reproductive season, following a similar pattern in all locations. In all populations the sex-ratio tended to became more male biased during the breeding season. Average male size at maturity also showed significant differences in place and time: it always tended to be smaller when population density was low and the sex-ratio was female-biased. This trend is in agreement with previous laboratory experiments which had shown a higher mating efficiency for small males when intrasexual competition was absent.
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.
