Untitled

Abstract

This study evaluated the effects of diet containing 1 and 2 g kg -1 T. terrestris extract on growth and reproductive performance of male Convict cichlid (C. nigrofasciatum). 117 male C. nigrofasciatum with an average initial weight of 2.30 ± 0.04 g were distributed into glass aquariums (13 fish/tank) in 3 replicates. The highest weight gain was obtained in 1 g kg -1 (123.83 ± 6.41 g) followed by 2 g kg -1 extract (121.13 ± 8.09 g) and control (80.10 ± 11.71 g) group (P< 0.05). In groups that received extract, specific growth rate increased significantly (P< 0.05). Comparison of feed conversion ratio and condition factor in different treatments indicates no significant differences (P> 0.05). Protein levels of dried body decreased after feeding the fish with extract (P< 0.05). Fish fed with extract showed higher lipid and moisture content than fish fed by control diet (P< 0.05). The highest belly diameter was observed in treatment containing 1 g kg -1 extract (9.93 ± 0.23 cm, P< 0.05). Fertilization (%) decreased significantly in 2 g kg -1extract when compared with control and other group (P< 0.05). The highest amount of hatching rate (%) was observed in 1 g kg -1(94.24 ± 3.01) and its least amount was found in 2 g kg -1 extract (72.65 ± 0.23, P> 0.05).

Dietary supplementation ofTribulus terrestrisextract improves growth and reproductive performances of the male Nile tilapia (Oreochromis niloticus)

“…The results of present study showed that tribulus terrestris extract has a great positive effect on growth performance, due to androgenic effect of Tribulus terrestris that have a major role in the growth and differentiation of reproductive organs. Similar findings were recorded by Yeganeh et al, (2017) who found that the supplemented T. terrestris extract as a feed additive for C. nigrofasciatum improves growth performance and hatchability per cent. Furthermore, T. terrestris administration increased appetite, food utilization and protein synthesis due to its androgenic effect (Donaldson, 1979;Jayaprakas & Sindhu, 1996;Mukhopadhyay, Venkatesh, & Das, 1986).…”

“…In order to reduce the use of antibiotics and other chemicals in the field of aquaculture, many feed additives were used as probiotics and phytobiotics (Elsabagh et al, 2018;Yeganeh, Sotoudeh, & Movaffagh, 2017). Recently, phytobiotics (plant additives) are extensively used as aquafeed additives due to its comparatively harmless natural components and to improve fish growth performance, weight gain and feed conversion ratio in the fish farms (Yeganeh et al, 2017).…”

Effect of some Nutritional and Enviromental Factors on Production of Mono Sex Nile Tilapia (Oreochromis niloticus)

“…On the contrary of nursery stage, T9 gave the highest weight gain, final weight, SGR, and best FCR, followed by T8, while the basal diet was the worst. These results may agree with Yeganeh et al (2017) in the superiority of the two doses of T. terrestris extract compared to the control diet, no significant differences were observed among doses of T. terrestris extract in FCR and survival. At the same time, they may differ in that the best effect came with the lowest dose (the highest WG and FW were obtained at 1g/kg -1 followed by 2 g/kg -1 T. terrestris extract).…”

Enhancement of Skin Mucus Immunity, Carotenoid Content, Sexual Parameters, and Growth Response in Guppy Fish (Poecilia reticulata) Fed with Green Algae (Chaetomorpha aerea) Diets

“…Hormonal function has been demonstrated by several bioactive chemicals that have been separated from plants. The most active phytoestrogens have estrogenic activity and interact with oestrogen receptors, whereas interactions between isoflavones and phytoestrogens and the androgen and progesterone receptors are less prevalent [42,43]. Earlier studies have shown that plant compounds can mimic sex hormones as agonists or antagonists to nuclear receptors, as well as modulate the biosynthesis of sex hormones by altering the activity and expression of enzymes [44][45][46][47].…”