Liver histology and hematological parameters of female Rhamdia quelen fed different lipid sources

Nivaldo Ferreira Do Nascimento,Ana Caroline Sousa Campos,Arlene Sobrinho Ventura,Robie Allan Bombardelli,Cleonice Cristina Hilbig,Laura Satiko Okada Nakaghi,Leandro Freitas Martins

doi:10.37496/rbz4920180204

Abstract

ABSTRACT The objective with this study was to evaluate the liver histology and hematological parameters of female Rhamdia quelen fed diets supplemented with different oils: 5% marine fish oil, 5% refined palm oil, 5% soybean oil, and a combination of the three. The lipid vacuolization (steatosis) in the liver was analyzed according to a score of vacuolization when: 0 = absence, 1 = reduced, 2 = intermediate, and 3 = intense. At the end of the experiment, females (n = [...]

Highlights

In fish farming, the diet represents the highest cost (Babalola and Apata, 2012), especially when its composition is derived from animal source, such as meal and fish oil
The objective with this study was to evaluate the liver histology and hematological parameters of female Rhamdia quelen fed diets supplemented with different oils: 5% marine fish oil, 5% refined palm oil, 5% soybean oil, and a combination of the three
The blood parameters were not influenced by the different diets, except for glucose levels, which was higher in the treatment with the mixture of oils

Summary

Introduction

The diet represents the highest cost (Babalola and Apata, 2012), especially when its composition is derived from animal source, such as meal and fish oil. Soybean oil represents 19 to 30% of oleic acid (C18:1n-9); 44 to 62% of linoleic acid (C18:2n-6), the main representative of the omega-6 fatty acids series; and 4 to 11% of linolenic acid (C18:3n-3), the main representative of the omega-3 series (Brasil, 1999). On the other hand, is considered a superior source of energy because it contains a large amount of saturated fatty acids (48%), represented mainly by palmitic acid (C16:0), and monounsaturated acids (42%), represented by oleic acid (C18:1n-9) (Ng, 2004; Ng and Wang, 2011). Vegetable oils can be used for partial or complete replacement of fish oil in fish diets (Babalola et al, 2011; Ayisi et al, 2018; Ayisi and Zhao, 2014; Ng, 2002)

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Conclusion