Garlic essential oil increases rates of eggs fertilization and hatching of Rhamdia quelen larvae in an artificial incubation system

Abstract

The objective of this study was to evaluate the effects of garlic (Allium sativum) essential oil on the rates of eggs fertilization and hatching and on the normal development of larvae of artificially incubated silver catfish (Rhamdia quelen). The experiment was carried out using a completely randomized experimental design with four treatments and five replicates. The treatments consisted of introducing garlic essential oil into the incubators, which used a closed system of water recirculation, at concentrations of 0, 1, 3, and 5mg L-1. Rates of eggs fertilization and larval hatching were determined at 10 and 24h after the beginning of eggs hydration. Morphology of larvae was assessed with the aid of a stereo microscope to determine the rate of normal development. The concentration of 5mg L-1 promoted better rates of eggs fertilization and larval hatching. Concentrations of garlic essential oil had a linear effect on eggs fertilization rates and larval hatching. Garlic oil did not influence the morphology of the larvae (P>0.05). It is recommended to use 5mg L-1 of garlic essential oil to promote better rates of eggs fertilization and larval hatching of artificially incubated silver catfish.

The effects of microencapsulated garlic (Allium sativum) extract on growth performance, body composition, immune response and antioxidant status of rainbow trout (Oncorhynchus mykiss) juveniles

“…Also, it possesses enhancing immune activities that include the promotion of lymphocyte proliferation, cytokine release, phagocytosis, and natural killer cell activity (Kyo et al 1998). Several previous studies have demonstrated the garlic ability to improve immune system capability (Nya et al 2010;Nwabueze 2012), antioxidant capacity (Drobiova et al 2011), growth performance and feed utilization (Lee et al 2012), body content and enzyme activity , egg fertilization and larval hatching (Marengoni et al 2017) in different aquatic animals. However, these properties have not yet been reported for microencapsulated garlic extract.…”

Dietary garlic essential oil on development parameters of severum post-larvae

“…Rice field eel (Monopterus albus) fed 800 mg kg -1 of composed allicin died after three days of feeding (Huang et al, 2001) and juvenile red bellied pacu (Colossoma barchypomum), also receiving a diet containing composed allicin, had a reduction in growth rate (Xiang and Liu, 2002). The most toxic components of allicin degradation are diallyl disulfide and diallyl trisulfide (Zhao et al, 2013;Marengoni et al, 2017). Moreover, degradation products of organosulfur compounds can be toxic when high concentrations thereof reach the intestines, interfering with normal metabolism, suppressing mitosis, leading to slow growth and even fish death (Shakya and Labh, 2014).…”