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dc.contributor.authorLazado, Carlo C.
dc.contributor.authorPedersen, Per Bovbjerg
dc.contributor.authorNguyen, Quang Huy
dc.contributor.authorLund, Ivar
dc.date.accessioned2018-01-26T14:15:14Z
dc.date.available2018-01-26T14:15:14Z
dc.date.created2017-07-29T08:33:45Z
dc.date.issued2017
dc.identifier.citationComparative Biochemistry and Physiology A. 2017, 212 107-116.nb_NO
dc.identifier.issn1095-6433
dc.identifier.urihttp://hdl.handle.net/11250/2479975
dc.description.abstractDigestive physiology is considered to be under circadian control, but there is little evidence in teleost fish. The present study explored the rhythmicity and plasticity to feeding schedules of enzymatic digestion in a candidate aquaculture fish, the permit (Trachinotus falcatus). The first experiment identified the rhythms of digestive factors throughout the light-dark (LD) cycle. Gastric luminal pH and pepsin activity showed significant daily variation albeit not rhythmic. These dynamic changes were likewise observed in several digestive enzymes, in which the activities of intestinal protease, chymotrypsin and lipase exhibited significant daily rhythms. In the second experiment, the existence of feed anticipatory activity in the digestive factors was investigated by subjecting the fish to either periodic or random feeding. Anticipatory gastric acidification prior to feeding was identified in periodically fed fish. However, pepsin activity did not exhibit such anticipation but a substantial postprandial increase was observed. Intestinal protease, leucine aminopeptidase and lipase anticipated periodic mealtime with elevated enzymatic activities. Plasma melatonin and cortisol demonstrated robust daily rhythms but feeding time manipulations revealed no significant impact. Plasma ghrelin level remained constant during the LD cycle and appeared to be unaffected by differing feeding regimes as well. Taken together, the digestive factors of permit were highly dynamic during the LD cycle. Periodic feeding entrained digestive physiology and mediated anticipatory gastric acidification and intestinal enzymatic activities. This knowledge will be essential in developing feeding protocols and husbandry-related welfare strategies that will further advance this candidate finfish as an aquaculture species.nb_NO
dc.language.isoengnb_NO
dc.titleRhythmicity and plasticity of digestive physiology in a euryhaline teleost fish, permit (Trachinotus falcatus)nb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.source.pagenumber107-116nb_NO
dc.source.volume212nb_NO
dc.source.journalComparative Biochemistry and Physiology Anb_NO
dc.identifier.doi10.1016/j.cbpa.2017.07.016
dc.identifier.cristin1483320
cristin.unitcode7543,1,4,0
cristin.unitnameFiskehelse
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode1


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