Abstract
Several health benefits have been attributed to conjugated linolenic acid isomers (CLnA). In this study, the diet for Nile tilapia was supplied with pomegranate seed oil (at 2.1%) as source of CLnA. The diet was provided to the fish for 15 and 30 days. The punic acid (40.58-53.77 mg g -1 of total lipids) was incorporated into Nile tilapia fillet after 15 and 30 days of experiment, respectively. When compared to the control diet, the level of total saturated fatty acids in fish were slightly increased. No change in the total amount of monounsaturated fatty acid was observed. The pomegranate seed oil diet was effective in the transference of CLnA to Nile tilapia.
Highlights
The pomegranate (Punica granatum) is cultivated around the world, especially in the Mediterranean area
Due to the high availability of pomegranate fruits in Brazil, this study aimed to evaluate the modifications in fatty acid composition and the incorporation of conjugated linolenic acid (CLnA) into tilapia fish fillet, after the fish being fed with diets supplemented with pomegranate seed oil
The PuA, from pomegranate seed oil, was the most found among the conjugated fatty acids in PSO diet (172.75 mg g-1 of total lipids)
Summary
The pomegranate (Punica granatum) is cultivated around the world, especially in the Mediterranean area. The pomegranate was commonly used in folk medicine for eliminating parasites, to treat and cure aphtae, ulcers, hemorrhage, microbial infections, and respiratory pathologies (Viuda-Martos, Fernández-López, & Pérez-Álvarez, 2010). According to Aviram and Rosenblat (2013), 50% of the fruit is edible. The edible parts of pomegranate fruits are consumed fresh or used for the preparation of fresh juice, canned beverages, jelly, jam, and paste, and it is used for flavoring and coloring beverage products (Viuda-Martos et al, 2010). 20% of the edible pomegranate part (seeds) is considered a byproduct, which is obtained during the processing of pomegranate juice (Aviram & Rosenblat, 2013). Seeds of pomegranate are a source of conjugated linolenic acid (CLnA). The CLnA isomers are found in plant seeds, such as bitter gourd (Momordica charantia), catalpa (Catalpa ovata), Chinese cucumber (Trichosanthes kirilowii), jacaranda (Jacaranda mimosifolia), marigold (Calendula officinalis), and tung (Aleurites fordii) (Koba, Belury, & Sugano, 2007)
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