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dc.contributor.authorMartinez-Llorens, Silvia
dc.contributor.authorPeruzzi, Stefano
dc.contributor.authorFalk-Petersen, Inger Britt
dc.contributor.authorGodoy-Olmos, Sergio
dc.contributor.authorUlleberg, Lars Olav
dc.contributor.authorTomas-Vidal, Ana
dc.contributor.authorPuvanendran, Velmurugu
dc.contributor.authorOdei, Derrick Kwame
dc.contributor.authorHagen, Ørjan
dc.contributor.authorFernandes, Jorge Manuel de Oliveira
dc.contributor.authorJobling, Malcolm
dc.date.accessioned2021-10-27T08:12:25Z
dc.date.available2021-10-27T08:12:25Z
dc.date.created2021-01-12T09:17:15Z
dc.date.issued2021
dc.identifier.citationPLOS ONE. 2021, 16 (1), .en_US
dc.identifier.issn1932-6203
dc.identifier.urihttps://hdl.handle.net/11250/2825878
dc.description.abstractTriploid, sterile Atlantic salmon (Salmo salar) could make a contribution to the development of the farming industry, but uncertainties about the performance and welfare of triploids have limited their adoption by farmers. In this study, we compared the ontogeny of digestive tract morphology and enzyme activities (pepsin, trypsin, chymotrypsin, alkaline phosphatase and aminopeptidase) of diploid and triploid Atlantic salmon. Fish were fed diets based on fishmeal (STD) or a mix of fishmeal and hydrolysed fish proteins (HFM) whilst being reared at low temperature from start-feeding to completion of the parr-smolt transformation. Fish weights for each ploidy and feed combination were used to calculate thermal growth coefficients (TGCs) that spanned this developmental period, and the data were used to examine possible relationships between enzyme activities and growth. At the end of the experiment, faeces were collected and analyzed to determine the apparent digestibility coefficients (ADCs) of the dietary amino acids (AAs). Digestive tract histo-morphology did not differ substantially between ploidies and generally reflected organ maturation and functionality. There were no consistent differences in proteolytic enzyme activities resulting from the inclusion of HFM in the diet, nor was there improved digestibility and AA bioavailability of the HFM feed in either diploid or triploid fish. The triploid salmon had lower ADCs than diploids for most essential and non-essential AAs in both diets (STD and HFM), but without there being any indication of lower intestinal protease activity in triploid fish. When trypsin-tochymotrypsin activity and trypsin and alkaline phosphatase (ALP) ratios (T:C and T:ALP, respectively) were considered in combination with growth data (TGC) low T:C and T:ALP values coincided with times of reduced fish growth, and vice versa, suggesting that T:C and T:ALP may be used to predict recent growth history and possible growth potential.
dc.language.isoengen_US
dc.relation.urihttps://hdl.handle.net/10037/20286
dc.titleDigestive tract morphology and enzyme activities of juvenile diploid and triploid Atlantic salmon (Salmo salar) fed fishmealbased diets with or without fish protein hydrolysatesen_US
dc.typeJournal articleen_US
dc.typePeer revieweden_US
dc.description.versionpublishedVersion
dc.description.versionpublishedVersion
dc.source.pagenumber28en_US
dc.source.volume16en_US
dc.source.journalPLOS ONEen_US
dc.source.issue1en_US
dc.identifier.doi10.1371/journal.pone.0245216
dc.identifier.cristin1869542
dc.relation.projectNorges forskningsråd: 248028
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.fulltextoriginal
cristin.qualitycode1


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