Nienhuis, Rik (2021) Origin-dependent schooling behaviour in three-spined sticklebacks (Gasterosteus aculeatus). Master's Research Project 1, Biology.
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Abstract
Water management in the Netherlands can be detrimental to anadromous fish species. Human-induced barriers built on migration routes of fish have split off migratory populations. Land-locked populations lose the ability to migrate, while marine populations may need to find new migration routes. In this study I looked at behavioural differences in three-spined sticklebacks between three F1 lab-bred populations (land-locked, marine and hybrid). This was done by recoding groups of fish from each population in a flow chamber. I extracted for each population the distance to the centre of the school, the interindividual distance and the orientation. My main finding is the significant difference in orientation between the migrants and residents, indicating genetic population differentiation in this aspect of their schooling behaviour. For the other aspects of schooling, no significant differences were found, pointing towards no genetic basis for distance to the centre of the school and interindividual distance. Alternatively, these behaviours may be genetically constrained and not able to evolve in the timeframe of isolation. The interindividual distance of fish swimming close together in a school exhibited high individual repeatability, suggesting this social behaviour may be heritable. The interindividual distance of fish swimming far apart in a school exhibited high repeatability in different trials, suggesting that school composition is important for school density.
| Item Type: | Thesis (Master's Research Project 1) |
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| Supervisor name: | Nicolaus, M. and Stamhuis, E.J. |
| Degree programme: | Biology |
| Thesis type: | Master's Research Project 1 |
| Language: | English |
| Date Deposited: | 13 Dec 2021 15:04 |
| Last Modified: | 13 Dec 2021 15:04 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/26358 |
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