Lipid requirement of bay snook (Petenia splendida Günther, 1862) juveniles

Uriel Rodríguez-Estrada, Otilio Méndez-Marín, Alfredo Pérez-Morales, Rafael Martínez-García, Emyr Peña-Marín, Roberto Civera-Cerecedo, Ernesto Goytortua-Bores, E., Rosario Martínez-Yáñez, Carlos A. Alvarez-González

Submited: 2019-08-30 17:56:41 | Published: 2020-09-01 15:36:11

DOI: https://doi.org/10.3856/vol48-issue4-fulltext-2429

Abstract


This research study is focused on the lipid requirements of Petenia splendida (0.65 ± 0.19 g) juveniles. Fish were fed with trout commercial diet (Silver Cup™ - 45% protein and 16% lipids), as control diet - CD (which is usually used to feed this species at commercial scale), and four isoproteic (45% crude protein) diet formulated with different lipid levels (5, 10, 15 and 20%). Diets were administered for 60 days by triplicate per treatment. Our results showed that fish fed with 10, 15 and 20% lipid levels were significantly higher (P < 0.05) in average weight and total length. Same treatments were significantly lower (P < 0.05) in terms of FCR compared to those shown in 5% and CD. However, fish fed 20% lipid level, showed a significant decrease in WG and a significant (P < 0.05) increase in FCR compared to those shown in 15% lipid level. Fish fed with 15% showed the highest weight gain and the lowest FCR compared with the rest of the treatments. Lipid efficiency ratio (LER) showed significant (P < 0.05) differences among experimental groups. Compared to other diets containing lipid levels (5, 10, and 20%) fish fed 15% diet recorded the lowest protein and lipid content in whole body. Additionally, based on second order polynomial regression analysis of WG, it was demonstrated that 16.2% lipid provides an optimal growth for P. splendida.

Rodríguez-Estrada U, Méndez-Marín O, Pérez-Morales A, Martínez-García R, Peña-Marín E, Civera-Cerecedo R, Goytortua-Bores, E. E, Martínez-Yáñez R, Alvarez-González C. Lipid requirement of bay snook (Petenia splendida Günther, 1862) juveniles. Lat. Am. J. Aquat. Res.. 2020;48(4): 674-685. Available from: doi:10.3856/vol48-issue4-fulltext-2429 [Accessed 27 Sep. 2020].
Rodríguez-Estrada, U., Méndez-Marín, O., Pérez-Morales, A., Martínez-García, R., Peña-Marín, E., Civera-Cerecedo, R., Goytortua-Bores, E., E., Martínez-Yáñez, R., & Alvarez-González, C. (2020). Lipid requirement of bay snook (Petenia splendida Günther, 1862) juveniles. Latin American Journal of Aquatic Research, 48(4), 674-685. doi:http://dx.doi.org/10.3856/vol48-issue4-fulltext-2429