Fish Waste Oil in Laying Hens* Diets

Abstract

The present study aimed to evaluate increasing levels of fish waste oil in laying hens diets on performance, egg quality, and sensory features of the eggs. 192 Hisex White laying hens with 29 weeks of age were used, with water and food ad libitum. The experimental design was completely randomized consisting of eight treatments corresponding to the inclusion levels of fish waste oil (0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0 and 3.5%) in the diets, with four replicates of six birds each. Data collected were subjected to polynomial regression at 5% of significance. Differences (p<0.05) were observed in feed intake and egg mass. Feed intake increased until 2.50% of fish waste oil in the diets. Differences were not observed (p>0.05) in all variables analyzed. Differences were observed (p<0.05) in flavor. Eggs from birds fed diets up to 2.00% present better acceptance by the tasters. Above this level, there was a considerable drop in acceptance. From these results, the present study indicates that the use of fish waste oilin laying hens diets did not affect the egg quality. However, its high inclusion negatively affected the feed intake, egg mass, and egg flavor.

Fatty acid profile of eggs produced by laying hens fed diets containing different shares of fish oil

“… Yalcin (2017) found out that fish oil could be added up to 1.5% to laying hens diets to preserve the organoleptic properties of eggs. Brelaz et al. (2019) investigated the fish oil use (from fish processing waste) in the laying hens feed aiming to affect performance, egg quality and sensory properties of eggs.…”

“…(2012) recommended the use of sources rich in EPA and DHA in the laying hens diets. The vegetable and fish oil combination in the laying hens feeding has been effective ( Kralik et al., 2008a , b ; Škrtić et al., 2008 ; Lemahieu et al., 2015 ; Brelaz et al., 2019 ) in enriching eggs with n-3 PUFA. Fish oil is added to feed in limited quantities due to the possible occurrence of undesirable odors in eggs ( Lawlor et al., 2010 ).…”

“…Fish oil is added to feed in limited quantities due to the possible occurrence of undesirable odors in eggs ( Lawlor et al., 2010 ). Research of some authors indicated that the different fish oils added to laying hens feed resulted in a significant n-3 PUFA increase in egg yolks ( Cherian et al., 2007 ; Kralik et al., 2008b ; Mariod et al., 2015 ; Brelaz et al., 2019 ). Eggs with high n-3 PUFA content are called “Enriched” eggs ( Cherian et al., 2007 ; Dong et al., 2018 ).…”

Performance and egg quality of Japanese quail fed diets containing microalgae Schizochytrium sp.

“…In recent years, the poultry and egg industries have explored nutritional strategies in the formulation of poultry diets, by modifying the composition of the yolk lipids (Brelaz et al, 2019). Therefore, the eggs can be considered a reference model for transferring nutrients from the diet, once the yolk fatty acid type is related to the consumed in the feed.…”

Effect of adding rapeseed oil, fish oil and selenium on the diet enriched with vitamin E and zinc on the yield and organoleptic properties of eggs

“…What is always about egg in mind is its nutritional value, but eggs also have other important effects that make this valuable protein component separate from other foods. Eggs are a good source of necessary protein, vitamins and minerals, and can be an important nutrient in the diet of individuals (Bourre and Galea, 2006). Simopoulos and Salem (1989) showed that in Greece, hens that were allowed to feed freely, especially those fed with weed and ALA-rich grains, had a good growth, and their eggs had more omega-3 fatty acids than other hens grown in cage.…”