Effects of thermal stress on physiological responsess in male red hybrid tilapia oreochromis

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dc.contributor.authorHazza Roshada Ramli
dc.date.accessioned2019-11-27T02:56:35Z
dc.date.available2019-11-27T02:56:35Z
dc.date.issued2017-06
dc.description.abstractEffect of thermal stress on some physiological activities were examined in male red hybrid tilapia (Oreochromis sp.). The 24h loss of equilibrium temperature (LET50) and lethal temperature (LT50) were preliminarily identified using water temperature regime of 28, 30, 32, 34 and 36 °C, and determined at 31.6 and 33.6 °C, respectively. Fish were then subjected to gradual acclimation at 1°C/8 h from 28 to 31 °C, and exposed for a duration of 1, 7 and 14 days. The effect of sublethal thermal stress on the activities of cortisol, HMG-CoA reductase, osmolality, ionic composition and total protein in plasma; citrate synthase activities in brain, liver and kidney tissues, 11-ß hydroxylase activity in testis tissue, as well as oxidative stress responses (lipid peroxidation, superoxide dismutase, catalase, glutathione-S-transferase) in muscle, liver and kidney tissues were investigated. Plasma cortisol was gradually increased from day 1 to day 7, but decreased on day 14. Plasma HMG-CoA reductase and 11-ß hydroxylase in testis tissue were also significantly increased (p < 0.05) on day 14.en_US
dc.identifier.urihttps://umt-ir.umt.edu.my/xmlui/handle/123456789/14235
dc.language.isoenen_US
dc.publisherUniversiti Malaysia Terengganuen_US
dc.subjectTilapiaen_US
dc.subjectFish-cultureen_US
dc.subjectCichlidae (Chichlids)en_US
dc.subjectSH 167 .T54 H3 2017en_US
dc.titleEffects of thermal stress on physiological responsess in male red hybrid tilapia oreochromisen_US
dc.typeThesisen_US
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