TUBER YAM (Dioscorea hispida) COULD INFLUENCE REPRODUCTIVE HORMONE OF TIGER GROUPER (Epinephelus fuscoguttatus)

Ahmad Daud Om*a, Kamarul Azlan Azizanb, Syarul Nataqain Baharum b
 
 
aFisheries Research Institute, Tanjong Demong, 22200 Besut, Terengganu, Malaysia
bInstitute of Systems Biology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
1966adom@gmail.com.com

Tuber of different species of genus Dioscorea (Dioscoreaceae Family) are known as yam or Ubi Gadong in Malaysia. It more 600 species exist in Africa, Asia and Tropical America and about 19 noncultivated Dioscorea species in Malaysia. This important plant is lots of biological activities of have been reported for antioxidative, anti-fungal, anti-mutagenic   hypoglycaemic,  immunomodulary effect and it is used as an important ingredient of dietary supplements. Some tubers have been evaluated for steroid hormone production. Therfore, an attempt has discover to analysis the role of tuber for enhancement reproductive hormone of tiger grouper.

The yields phytoestrogen as hormone in was analyzed with GC-MS, successfully with prostaglandin (PGE1) 0.378 mg/mL in 200mg sample (Fig.1).  The fatty acid composition of tuber yam was dominating with Palmitic acid as saturated fatty acid (32%) and  followed by  linoleic acid the unsaturated fatty acid (30.0%). The effects brought by these substances were explored the hormones expressions in tubers Yam in the 50 days implant experiment (Fig.2). Tiger grouper test with tubers Yam (ethanol solvent) showed highest increased estradiol hormone after 40 days implanted.

It showed, tuber yam could be effects to enhance reproductive hormone of Tiger Grouper. It may stimulate the sex steroid production and in turns may potentially exert some positive actions on reproductive success of brood stock management