Dietary Aloysia triphylla essential oil on growth performance and biochemical and haematological variables in Nile tilapia

The effect of clinoptilolite as a feed additive on selected rainbow trout ( Oncorhynchus mykiss ) haematological and biochemical parameters, before and after stress treatment

“…Furthermore, WBC, Hb and MCH were generally lower, and PCV higher, after stress treatment, though differences in the values were not statistically significant. Similar results have been described in juvenile Nile tilapia ( Oreochromis niloticus ) by de Souza et al (2020), where an increase in PCV and RBC levels was observed as a possible compensatory response to a decrease in Hb and MCHC after being fed a diet with the addition of Aloysia triphylla essential oil. PCV, RBC and Hb are all connected to oxygen transport capacity and a decrease in PCV and RBC levels may indicate anaemia (de Souza et al, 2020).…”

“…Similar results have been described in juvenile Nile tilapia ( Oreochromis niloticus ) by de Souza et al (2020), where an increase in PCV and RBC levels was observed as a possible compensatory response to a decrease in Hb and MCHC after being fed a diet with the addition of Aloysia triphylla essential oil. PCV, RBC and Hb are all connected to oxygen transport capacity and a decrease in PCV and RBC levels may indicate anaemia (de Souza et al, 2020). According to Adeyemo et al (2009), handling and transport stress caused a (non‐significant) reduction in PCV and RBC in African catfish ( Clarias gariepinus ) compared with a non‐stressed group.…”

“…However, Khodanazary et al (2013) observed an increase of GLUC in common carp (Cyprinus carpio) after the addition of zeolite and perlite, which also corresponds to our results. These increased GLUC values may also reflected higher growth rates or higher conversion efficiency (Yousefian et al, 2010 (Kanyilmaz & Tekellioğlu, 2016;de Souza et al, 2020). These parameters in our study, except for ALT, which was significantly elevated, were not significantly affected by the treatments, suggesting that dietary zeolite values do not have a serious detrimental effect on TA B L E 4 Fish haematological parameters (mean ±SD) in the control and experimental treatments before (A) and after (B) stress induction.…”

“…There were observed a significant quadratic effect on CHOL and ALT values, but at the same time, no significant trend was occurred in UREA, AST and ALP values with dietary zeolite addition (Kanyilmaz & Tekellioğlu, 2016). Elevated plasma ALT, AST and ALP are potentially associated with diagnostic functions caused by liver, gut or bile ducts damages (Kanyilmaz & Tekellioğlu, 2016; de Souza et al, 2020). These parameters in our study, except for ALT, which was significantly elevated, were not significantly affected by the treatments, suggesting that dietary zeolite values do not have a serious detrimental effect on rainbow trout health.…”

A blend of herbal essential oils enhanced the growth performance, blood bio-immunology traits, and intestinal health of Nile tilapia (Oreochromis niloticus)

“…Nile tilapia (Oreochromis niloticus) becomes the main commercial finfish species in the whole world because of its delicious taste, profitable value, and resistance to unstable farming conditions (Mengistu et al, 2020). The inclusion of EOs in tilapia diets is previously applied, such as oregano (Mabrok, Wahdan, 2018), thymol (Valladão et al, 2019), orange peel (Acar et al, 2015), menthol (Magouz et al, 2021), fennel (Abdel Rahman et al, 2017), Aloysia triphylla (de Souza et al, 2020), and ginger (Brum et al, 2017). The results concluded positive effects of incorporating EOs in tilapia diets on feed utilization, digestion capacity, the abundance of beneficial microorganisms in the intestine, metabolic functions, immune response, antioxidative status, and resistance against infection.…”