Martin-Podevin, Loéva (2022) Does fishway passage success depend on individual phenotype? A study in three-spined sticklebacks (Gasterosteus aculeatus). Master's Research Project 1, Marine Biology.
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Abstract
High numbers of artificial barriers such as dams, pumping stations and sluices are constructed worldwide to help us with several social and economic purposes. However, these structures can also block the migration of fish and prevent them from completing their life cycles. To mitigate this, fishways have been implemented to allow the safe passage of migratory fish species and restore river connectivity. Studies have shown that the passage success of fishways can vary between fish species based on their morphology, physiology and behaviour (fish length, swimming behaviour). This study aimed to investigate whether fishways can induce a phenotypic bias in exploration behaviour, fish length and timing of migration using three-spined sticklebacks (Gasterosteus aculeatus). To research this, fish were caught at two sampling sites in the Netherlands (n=191) and tested for their exploratory behaviour using passive transponder tags (PIT). Then, sticklebacks of known behavioural phenotypes were released in front of a fishway equipped with antennas to track their movements. Although passage success and latency to cross the fishway were not associated with variation in exploration behaviour and fish length, passage success was partly phenotype dependent for individual timing of migration. Timing of migration was a strong predictor of passage success with late migrants being more successful and faster at using the fishway.
| Item Type: | Thesis (Master's Research Project 1) |
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| Supervisor name: | Nicolaus, M. |
| Degree programme: | Marine Biology |
| Thesis type: | Master's Research Project 1 |
| Language: | English |
| Date Deposited: | 18 Oct 2022 12:29 |
| Last Modified: | 18 Oct 2022 12:29 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/28857 |
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