Propofol and benzocaine anesthetics responses profiles in Nile Tilapia

dc.contributor.authorGonçalves, Bruno Bastos
dc.contributor.authorGiaquinto, Percília Cardoso [UNESP]
dc.contributor.institutionGoiás Federal University
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2021-06-25T11:05:21Z
dc.date.available2021-06-25T11:05:21Z
dc.date.issued2020-09-01
dc.description.abstractImproving welfare in fish requires avoiding pain, stress and suffering. Propofol, 2,6diisopropylphenol, seems to be a good candidate as a fish anaesthetic, however, no study regarding propofol influence on Nile tilapia has yet been reported. With this aim, the efficiency of propofol and benzocaine was compared as anesthetic for fish following immersion exposure. Nile tilapia (Oreochromis niloticus) was used as model due its importance in aquaculture, been the most important fish for human consumption, where 4.5 million tonnes of fish are produced worldwide. At first, determination of effective anaesthetic concentrations to induce complete anesthesia was determined, under immersion, considering time to start decubitus stage. Then the magnitude of these anesthetics was tested, measuring its effects on time remaining in decubitus, posture recovery, ventilatory frequency (VF) and latency to feed. Benzocaine induced reduction of VF under decubitus. After the anesthetic effects, VF returned quickly to basal levels. The same pattern was observed for propofol, however with no return to basal levels after recovery. Time to start decubitus was similar in both anesthetic, but time to return was higher in propofol. The latency to feed was longer in fishes submitted to propofol. Thus, propofol is a more powerful anesthetic than benzocaine in Nile tilapia, with longer duration and deeper effect. Although the common usage of propofol is by intravenous injection, here we show that immersion is efficient as an anesthetic in fish and could be adopted as a protocol in experimentation as well aquaculture management. Analgesia in fish is an area in need of significant research as only a few studies exist and they provide some contrasting results.en
dc.description.affiliationLaboratory of Environmental Biotechnology and Ecotoxicology Institute of Tropical Pathology and Public Health of UFG Goiás Federal University
dc.description.affiliationGiaquinto Physiology Department Bioscience Institute São Paulo State University UNESP
dc.description.affiliationUnespGiaquinto Physiology Department Bioscience Institute São Paulo State University UNESP
dc.format.extent219-225
dc.identifierhttp://dx.doi.org/10.22034/iar.2020.1895923.1026
dc.identifier.citationInternational Aquatic Research, v. 12, n. 3, p. 219-225, 2020.
dc.identifier.doi10.22034/iar.2020.1895923.1026
dc.identifier.issn2008-6970
dc.identifier.issn2008-4935
dc.identifier.scopus2-s2.0-85092589984
dc.identifier.urihttp://hdl.handle.net/11449/208043
dc.language.isoeng
dc.relation.ispartofInternational Aquatic Research
dc.sourceScopus
dc.subjectAnesthesia
dc.subjectAnimal welfare
dc.subjectAquaculture
dc.subjectManagement
dc.subjectOreochromis niloticus
dc.subjectVentilatory frequency
dc.titlePropofol and benzocaine anesthetics responses profiles in Nile Tilapiaen
dc.typeArtigo

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