Digestible protein levels and metabolic responses in juvenile piapara (Megaleporinus obtusidens)

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dc.contributor.authorDe Almeida, Viviane Do Nascimento Santana [UNESP]
dc.contributor.authorCarli, Gabriela Castellani [UNESP]
dc.contributor.authorSátiro, Thaise Mota [UNESP]
dc.contributor.authorDo Nascimento, Thiago Matias Torres [UNESP]
dc.contributor.authorTakahashi, Leonardo Susumu [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2023-07-29T13:56:43Z
dc.date.available2023-07-29T13:56:43Z
dc.date.issued2023-04-12
dc.description.abstractThis study aimed to determine the effects of dietary digestible protein (DP) on growth and physiological indicators in piapara. Three hundred piapara juveniles (24.0 ± 1.3 g) were distributed in 20 tanks of 130 L (15 fish/tank) with continuous aeration and water. Five isoenergetic diets (14.0 MJ·kg-1) were formulated to contain increasing levels of DP (21, 24, 27, 30 and 33%). After 77 days of feeding, increasing levels of digestible protein influenced final weight, specific growth rate and weight gain linearly (p < 0.05). Water ammonia concentration and liver alanine aminotransferase activity also showed a linear effect with an increasing DP level (p < 0.05), but no relationship was found between DP level and serum ammonia (p > 0.05). There was no linear and quadratic effect for hepatosomatic index, liver glycogen and liver lipid content (p > 0.05). On the other hand, the muscle lipid content decreased linearly with the increase in the DP level (p < 0.05), while the mesenteric fat index showed a linear and quadratic effect (p < 0.05) with an increasing curve until the peak of 25.77% DP. The activity of the hepatic malic enzyme also followed a quadratic pattern (p < 0.05) with a maximum point of 27.08% of DP. This contrasts with the hepatic enzyme glucose- 6-phosphate dehydrogenase, which increased linearly with the increase in the DP level (p < 0.05). The results showed better productive performance for fish fed with the highest levels of DP, though greater excretion of ammonia in the water was also shown. Diets below 27% DP resulted in greater energy reserve, amino acid catabolism and lipogenesis. Therefore, the inclusion of 28 to 30% DP in the diet will be ideal for growth and physiological responses in piapara.en
dc.description.affiliationUniversidade Estadual Paulista “Júlio de Mesquita Filho” Faculdade de Ciências Agrárias e Tecnológicas, SP
dc.description.affiliationUniversidade Estadual Paulista “Júlio de Mesquita Filho” Centro de Aquicultura, SP
dc.description.affiliationUnespUniversidade Estadual Paulista “Júlio de Mesquita Filho” Faculdade de Ciências Agrárias e Tecnológicas, SP
dc.description.affiliationUnespUniversidade Estadual Paulista “Júlio de Mesquita Filho” Centro de Aquicultura, SP
dc.identifierhttp://dx.doi.org/10.20950/1678-2305/bip.2023.49.e754
dc.identifier.citationBoletim do Instituto de Pesca, v. 49.
dc.identifier.doi10.20950/1678-2305/bip.2023.49.e754
dc.identifier.issn1678-2305
dc.identifier.issn0046-9939
dc.identifier.scopus2-s2.0-85160412293
dc.identifier.urihttp://hdl.handle.net/11449/248898
dc.language.isoeng
dc.relation.ispartofBoletim do Instituto de Pesca
dc.sourceScopus
dc.subjectEnergy retention
dc.subjectOmnivorous
dc.subjectPerformance
dc.subjectPhysiological indicators
dc.titleDigestible protein levels and metabolic responses in juvenile piapara (Megaleporinus obtusidens)en
dc.titleNíveis de proteínas digestíveis e respostas metabólicas em juvenis de piapara (Megaleporinus obtusidens)pt
dc.typeArtigo
unesp.author.orcid0000-0002-3176-5108[1]
unesp.author.orcid0000-0002-3274-2012[2]
unesp.author.orcid0000-0003-1204-1718[3]
unesp.author.orcid0000-0002-8386-6904[4]
unesp.author.orcid0000-0002-5820-188X[5]

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Jaboticabal - CAUNESP - Centro de Aquicultura da Unesp