Moisture content in diets in the co-feeding phase of Pseudoplatystoma sp. influences performance and digestive process.

Autor: Dorce LS; Faculdade de Ciências Agrárias, Universidade Federal da Grande Dourados, Rodovia Dourados - Itahum, km 12, Dourados, 79804970, Mato Grosso do Sul, Brazil., Godoy AC; Faculdade de Ciências Agrárias, Universidade Federal da Grande Dourados, Rodovia Dourados - Itahum, km 12, Dourados, 79804970, Mato Grosso do Sul, Brazil. ufgd.work.group.aqua@gmail.com.; Departamento de Pesquisa em Recursos Naturais, Instituto Federal de Educação do Paraná, 475 Civica Avenue , Assis Chateaubriand, 85935-000, Paraná, Brazil. ufgd.work.group.aqua@gmail.com., Santos RFB; Departamento de Bioquímica, Universidade Federal de Pernambuco, Rod. Governador Mário Covas, Cidade Universitária, Recife, 50670420, Pernambuco, Brazil., Ota ÉDC; Laboratório de Macroecologia e Evolução, Universidade Estadual do Mato Grosso do Sul, Rodovia Dourados - Itahum, km 12, Dourados, 79804970, Mato Grosso do Sul, Brazil., Reges JAU; Faculdade de Ciências Agrárias, Universidade Federal da Grande Dourados, Rodovia Dourados - Itahum, km 12, Dourados, 79804970, Mato Grosso do Sul, Brazil., Ferreira ACV; Faculdade de Ciências Agrárias, Universidade Federal da Grande Dourados, Rodovia Dourados - Itahum, km 12, Dourados, 79804970, Mato Grosso do Sul, Brazil., Braz PH; Laboratório de Macroecologia e Evolução, Universidade Federal da Fronteira Sul, Rodovia BR 182 - Km 466 - Rural , Realeza, 98400000, Paraná, Brazil., Neu DH; Faculdade de Ciências Agrárias, Universidade Federal da Grande Dourados, Rodovia Dourados - Itahum, km 12, Dourados, 79804970, Mato Grosso do Sul, Brazil., Honorato CA; Faculdade de Ciências Agrárias, Universidade Federal da Grande Dourados, Rodovia Dourados - Itahum, km 12, Dourados, 79804970, Mato Grosso do Sul, Brazil.
Jazyk: angličtina
Zdroj: Veterinary research communications [Vet Res Commun] 2024 Oct; Vol. 48 (5), pp. 2977-2988. Date of Electronic Publication: 2024 Jul 03.
DOI: 10.1007/s11259-024-10448-3
Abstrakt: Live food in the initial life stages of neotropical fish is essential for their development and health; however, it can significantly increase production costs. This study uses complete diets with varying moisture contents (47%, 35%, 24%, and 8%) as a cost-effective alternative in the co-feeding phase of surubim larvae, assessing their influence on development, digestive enzymes, and liver metabolism. In a completely randomized design, 3200 three-day-old Pseudoplatystoma sp. larvae (0.001 g) were distributed evenly among 16 aquariums (20 L), with 200 individuals per aquarium. For the first five days, all larvae were fed Artemia exclusively, after which they were fed experimental diets with varying levels of humidity (47%, 35%, 24%, and 8%) six times a day across four treatments and four replicates. The 21-day feeding trial demonstrated that larvae fed with 24% and 8% moisture diets exhibited increased (p < 0.05) weight gain, final length, and protein efficiency rate. The remaining growth parameters (i.e., specific growth rate and condition factor) did not show significant differences (p > 0.05) among the dietary treatments. Enzymatic analysis revealed that the 47% moisture diet enhanced the amylase and alkaline phosphatase activities, whereas the 24% and 35% moisture diets elevated the lipase and protease activities. The 47% moisture diet also resulted in increased alanine aminotransferase, aspartate aminotransferase, and albumin levels, along with visible hepatic histopathologies in samples, such as visible lipid vacuoles, displacement of the nucleus of the hepatocyte, and increased sinusoid spaces. No significant liver changes were observed in fish fed with other diets. Principal component analysis showed that diets with 8-24% moisture content were the most beneficial during the co-feeding phase of surubim larviculture.
(© 2024. The Author(s), under exclusive licence to Springer Nature B.V.)
Databáze: MEDLINE
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