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Reproductive behaviour of female rosy bitterling Rhodeus ocellatus in response to a female-biased operational sex ratio
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SYSNO ASEP 0428525 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Reproductive behaviour of female rosy bitterling Rhodeus ocellatus in response to a female-biased operational sex ratio Author(s) Liao, C. (CN)
Yu, D. (CN)
Chen, Y. (CN)
Reichard, Martin (UBO-W) RID, ORCID, SAI, SAI
Liu, H. (CN)Number of authors 5 Source Title Behaviour. - : Brill - ISSN 0005-7959
Roč. 151, č. 6 (2014), s. 755-768Number of pages 14 s. Language eng - English Country NL - Netherlands Keywords alternative reproductive behaviour ; female aggression ; operational sex ratio ; bitterling Subject RIV EG - Zoology R&D Projects GBP505/12/G112 GA ČR - Czech Science Foundation (CSF) Institutional support UBO-W - RVO:68081766 UT WOS 000335205100004 EID SCOPUS 84899057738 DOI 10.1163/1568539X-00003168 Annotation While the effect of Operational Sex Ratio (OSR) on reproductive behaviour of males has been studied extensively, little is known of the response of females facing a female-biased OSR. We investigated the effect of different OSRs on female reproductive behaviour using the rosy bitterling, Rhodeus ocellatus, a freshwater fish that lays its eggs inside the gills of living freshwater mussels. Three levels of OSR (male/female ratio 1:1, 1:3 and 1:5) were tested. We demonstrated that inspection of the mussel (spawning substrate) by individual females increased with increasingly female-biased OSR, but that the rate of following territorial male decreased. Aggression towards other females was not affected by the OSR. Interestingly, when a male bitterling led a non-dominant female towards the mussel, the dominant female would become aggressive to the male and chase the non-dominant female away. Aggression towards male followed a bell-shaped pattern and was highest at an OSR of 1:3. In both the female-biased OSRs examined, almost 50% of dominant females tended to chase away other females and defend the mussel, showing territoriality in a similarmanner to males. These observations suggest that female reproductive behaviour is strongly affected by the OSR, and their reproductive tactics during courtship change from a passive role in courtship (following a male) to an active role in courtship (approaching a male), with presence of female territorial behaviour as the OSR becomes increasingly female-biased. This study provides strong evidence that a female-biased OSR has an important effect on female reproductive behaviour. Workplace Institute of Vertebrate Biology Contact Hana Slabáková, slabakova@ivb.cz, Tel.: 543 422 524 Year of Publishing 2015
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