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Effects of Randomly Fired Underwater Currents as an Occupational Enrichment Program in Rainbow Trout (Oncorhynchus mykiss)

dc.contributor.authorVillarroel, Morris
dc.contributor.authorMiranda de la Lama, Genaro C.
dc.contributor.authorBermejo Poza, Rubén
dc.contributor.authorPérez, Concepción
dc.contributor.authorGonzález De Chávarri Echániz, Elisabeth
dc.contributor.authorTorrent, Fernando
dc.contributor.authorFuente Vázquez, Jesús De La
dc.date.accessioned2023-06-16T14:26:09Z
dc.date.available2023-06-16T14:26:09Z
dc.date.issued2021-11-01
dc.description.abstractOccupational enrichment (OE) is directed at introducing variations in the tank water so that fish can exercise as they do in the wild. Two trials were carried out to test the effects of randomly fired underwater currents (RFC) on rainbow trout (Oncorhynchus mykiss) maintained in tanks in a recirculation system, using 1226 trout distributed in two independent trials. In Trial 1, fingerling trout (n = 6 tanks, n = 40 fish per tank) were classified into two groups based on low (13%) or high (30%) coefficient of variation in live weight (CV), and exposed to RFC or no currents (controls). In Trial 2, adult trout (n = 12 tanks, n = 20 fish per tank) were either exposed to RFC or to a constant current (controls) from two submerged pumps. Both trials lasted four weeks. No significant differences in growth were observed between treatments in either trial. In Trial 1, RFC fish maintained a similar CV throughout the trial, while CV decreased in controls. Also, in Trial 1, plasma cortisol levels were higher and creatine phosphokinase (CPK) levels lower in tanks with a low initial CV. In Trial 2, the CV was lower in RFC trout, where cortisol levels were also significantly lower and triglycerides significantly higher. The results suggest that OE using RFC can have positive effects by helping to reduce stress levels, and provides fish with biologically meaningful environmental enrichment related to the natural history of the species.
dc.description.departmentDepto. de Producción Animal
dc.description.departmentSección Deptal. de Fisiología (Veterinaria)
dc.description.facultyFac. de Veterinaria
dc.description.refereedTRUE
dc.description.sponsorshipEU ANIHWA ERA-Net
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/77424
dc.identifier.doi10.3390/w13213057
dc.identifier.issn2073-4441
dc.identifier.officialurlhttps://doi.org/10.3390/w13213057
dc.identifier.relatedurlhttps://www.mdpi.com/2073-4441/13/21/3057
dc.identifier.urihttps://hdl.handle.net/20.500.14352/5025
dc.issue.number21
dc.journal.titleWater
dc.language.isoeng
dc.page.initial3057
dc.publisherMPDI
dc.relation.projectIDERA58-WIN-FISH
dc.rightsAtribución 3.0 España
dc.rights.accessRightsopen access
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/es/
dc.subject.keywordtrout welfare
dc.subject.keywordenvironmental enrichment
dc.subject.keywordoccupational enrichment
dc.subject.keywordunderwater currents
dc.subject.keywordfish stress
dc.subject.ucmPiscicultura
dc.subject.unesco3105.02 Piscicultura
dc.titleEffects of Randomly Fired Underwater Currents as an Occupational Enrichment Program in Rainbow Trout (Oncorhynchus mykiss)
dc.typejournal article
dc.volume.number13
dspace.entity.typePublication
relation.isAuthorOfPublication0d6a72b6-296f-4f45-a49f-e9a74e6c576c
relation.isAuthorOfPublicationf9d5504c-ba5b-4ac0-9e17-75c53b33b6bf
relation.isAuthorOfPublication7cfcf12c-6ea2-4622-88f2-0de4cce1ec13
relation.isAuthorOfPublication.latestForDiscovery0d6a72b6-296f-4f45-a49f-e9a74e6c576c

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