期刊
ANIMAL BEHAVIOUR
卷 148, 期 -, 页码 53-62出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.anbehav.2018.12.005
关键词
assortative mating; mate choice; male-male competition; snail; trail following
资金
- Swedish Research Councils
- GENECO
- Xunta de Galicia (Grupo de Referencia Competitiva) [ED431C2016-037]
- Ministerio de Economia y Competitividad [CGL 2016-75482-P]
- Fondos FEDER ('Unha maneira de facer Europa')
- Royal Swedish Academy of Sciences
- Research Grants Council of the Hong Kong SAR Government via the General Research Fund (GRF) [HKU 17121914 M]
- Uvigo Marine Research Centre - 'Escellence in Research (INUGA)' Program from the Regional Council of Culture, Education and Universities
- European Union through the ERDF Operational Program Galicia 2014-2020
- VR and Formas
- Agriculture, Fisheries and Conservation Department of the Hong Kong SAR Government [MPA 01/5/2 Pt. 12]
Sexual size dimorphism is widespread among dioecious species, but its underlying driving forces are often complex. A review of sexual size dimorphism in marine gastropods revealed two common patterns: first, sexual size dimorphism, with females being larger than males, and, second, females being larger than males in mating pairs. Both patterns suggest sexual selection and sexual size dimorphism are causally related. To test this hypothesis, we investigated, first, mechanisms driving sexual selection on size in three congeneric marine gastropods with different degrees of sexual size dimorphism, and, second, the correlation between male/female sexual selection and sexual size dimorphism across several marine gastropod species. Male mate choice via mucus trail following (as evidence of sexual selection) was found during the mating process in all three congeneric species, even though not all species showed sexual size dimorphism. There was also a significant and strong negative correlation between female sexual selection and sexual size dimorphism across 16 cases from seven marine gastropod species. These results suggest that sexual selection does not drive sexual size dimorphism. There was, however, evidence of males utilizing a similar mechanism to choose mates (i.e. selecting a female slightly larger than their own size) which may be widespread among gastropods, and, in tandem with sexual size dimorphism varying between species, provides a plausible explanation of the mating patterns observed in marine gastropods. (C) 2018 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.
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