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Aquac. J., Volume 5, Issue 3 (September 2025) – 1 article

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Article
Effect of Commercial Diets on Growth and Digestive Physiology in Guppies (Poecilia reticulata)
by Yael José Trejo-Sánchez, Graciela María Pérez-Jiménez, Gabriel Núñez-Nogueira, Luis Daniel Jiménez-Martínez, Otilio Méndez-Marín, Gloria Gertrudys Asencio-Alcudia, Uriel Rodríguez-Estrada, Rafael Martínez-García, Carlos Alfonso Álvarez-González and César Antonio Sepúlveda-Quiroz
Aquac. J. 2025, 5(3), 10; https://doi.org/10.3390/aquacj5030010 - 8 Jul 2025
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Abstract
The objective of this work was to evaluate the effects of three commercial diets for ornamental fish (BIOMAA Spiruflake® (T1), Tetra TetraMin Tropical Flakes® (T2), LOMAS tropical fish flakes® (T3)) compared to a balanced feed for trout (Silver Cup TM [...] Read more.
The objective of this work was to evaluate the effects of three commercial diets for ornamental fish (BIOMAA Spiruflake® (T1), Tetra TetraMin Tropical Flakes® (T2), LOMAS tropical fish flakes® (T3)) compared to a balanced feed for trout (Silver Cup TM (T4)) on the growth, survival, digestive enzyme activity, and intestinal and liver morphology of guppy (Poecilia reticulata) fry after 31 days of feeding. The highest growth was in T2 (0.101 ± 0.004 g) and T4 (0.084 ± 0.008 g) (p < 0.05). Fish fed with T1, T2, and T4 presented the greatest total length. T4 (98 ± 2.828%) and T1 (96 ± 5.656%) had the highest survival. Fish fed with T2 and T4 showed the best growth index values (AWG, SGR, FCR). T4 showed greater alkaline protease, trypsin, and chymotrypsin activity and better in vitro digestibility. The fish fed the T4 diet had the lowest intestinal fold height and the smallest hepatocyte diameter. A cheaper aquaculture diet (T4) significantly improved guppy juvenile nutrition compared to ornamental feeds. Further research should focus on developing species-specific ornamental diets for enhanced fish welfare. Full article
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