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Enrichment and variability of rearing environment influence brain size and behaviour of hatchery-reared wild brook charr (Salvelinus fontinalis)

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dc.contributor.advisor McLaughlin, Rob
dc.contributor.author Goodwin, Melissa
dc.date.accessioned 2021-04-13T20:20:32Z
dc.date.available 2021-04-13T20:20:32Z
dc.date.copyright 2021-04
dc.date.created 2021-03-15
dc.identifier.uri https://hdl.handle.net/10214/24728
dc.description.abstract Fishes reared in conventional hatchery conditions can show reduced ability to respond to novel situations, potentially reducing their post-release survival and contribution to wild population recovery. Research has hypothesized that rearing fish under more complex and variable conditions will (1) encourage brain development, (2) improve behavioral performance in novel situations, and (3) potentially increase individual survival upon release. I evaluated the first two hypotheses by rearing subsets of juvenile brook charr (Salvelinus fontinalis) from eight families under treatment conditions differing in habitat complexity, and variability in the location of habitat structure and the timing and location of feeding. After a three-month rearing period, individuals were tested for risk taking in a novel environment and time to consume a novel prey item. Afterward, brains were extracted and weighed. Here, I demonstrate that rearing fish under more complex and variable environmental conditions encourages brain development and influences behavioural performance in novel situations. en_US
dc.language.iso en en_US
dc.subject Brook Charr en_US
dc.subject Hatchery en_US
dc.subject Behaviour en_US
dc.subject Captivity en_US
dc.subject Survival en_US
dc.subject Brain Size en_US
dc.subject Variability en_US
dc.subject Enrichment en_US
dc.subject Rearing Environment en_US
dc.subject Captive rearing en_US
dc.subject Structural complexity en_US
dc.subject Habitat complexity en_US
dc.subject Feeding variability en_US
dc.subject Fish en_US
dc.subject Novelty en_US
dc.subject Brain weight en_US
dc.subject Brain development en_US
dc.subject Population recovery en_US
dc.subject Conservation en_US
dc.title Enrichment and variability of rearing environment influence brain size and behaviour of hatchery-reared wild brook charr (Salvelinus fontinalis) en_US
dc.type Thesis en_US
dc.degree.programme Integrative Biology en_US
dc.degree.name Master of Science en_US
dc.degree.department Department of Integrative Biology en_US
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