Sex differences in laterality are associated with reproduction in three-spine stickleback
McLean, Stephanie; Morrell, Lesley
Dr Lesley Morrell L.Morrell@hull.ac.uk
Associate Dean (Education)
Laterality, the partitioning of information processing into specific brain hemispheres, is widespread across animal taxa. Substantial unexplained variation in this trait exists, particularly between the sexes, despite multiple identified advantages of lateralisation. Here, we demonstrate a relationship between laterality (measured as directional biases), reproduction and experience of mating and parenting. Using three-spine sticklebacks Gasterosteus aculeatus, a species with uniparental male care, we showed that individuals of the caring sex (males) were more strongly lateralised than the non-caring sex (females) during reproduction, and that laterality was reduced outside the breeding season in males. Additionally, males with experience of mating and parenting were more strongly lateralised than males without this experience. Our findings suggest that fitness related behaviours that vary between the sexes, such as reproductive behaviours including courtship, spawning and parenting, are significant but previously unidentified sources of variation in laterality.
McLean, S., & Morrell, L. (in press). Sex differences in laterality are associated with reproduction in three-spine stickleback. The American naturalist, https://doi.org/10.1086/714138
|Journal Article Type||Article|
|Acceptance Date||Dec 19, 2020|
|Online Publication Date||Mar 1, 2021|
|Deposit Date||Mar 1, 2021|
|Publicly Available Date||Mar 2, 2022|
|Journal||The American naturalist|
|Publisher||University of Chicago Press|
|Peer Reviewed||Peer Reviewed|
|Keywords||Cerebral lateralisation; Variation in laterality; Sex-differences; Parental care; Reproduction; Gasterosteus aculeatus|
This file is under embargo until Mar 2, 2022 due to copyright reasons.
Contact L.Morrell@hull.ac.uk to request a copy for personal use.
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