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Downing, J.A., Joss, J., Connell, P. and Scaramuzzi, R.J., “Ovulation rate and the concentrations of gonadotrophic and metabolic hormones in ewes fed lupin grain,” Journal of Reproduction and Fertility, 103(1). 137-145. Jan.1995.

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Article

Effect of Feeding Longan Dimocarpus longan Residue before Estrus Synchronization on Reproductive Performance in Ewes

1Department of Animal and Aquatic Science, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand

2Goat and Sheep Unit, Department of Animal and Aquatic Science, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand


World Journal of Agricultural Research. 2015, Vol. 3 No. 3, 113-118
DOI: 10.12691/wjar-3-3-4
Copyright © 2015 Science and Education Publishing

Cite this paper:
Tossapol Moonmanee, Saowaluck Yammuen-art, Mintra Seel-audom, Yongyouth Srivichai. Effect of Feeding Longan Dimocarpus longan Residue before Estrus Synchronization on Reproductive Performance in Ewes. World Journal of Agricultural Research. 2015; 3(3):113-118. doi: 10.12691/wjar-3-3-4.

Correspondence to: Tossapol  Moonmanee, Department of Animal and Aquatic Science, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand. Email: tossapol.m@cmu.ac.th

Abstract

To evaluate the effect of feeding longan residue (longan fruit; grade C) before estrus synchronization on reproductive performance in sheep, sixteen ewes observed in estrus were selected and randomly assigned to 2 groups: control group (n=8) received the maintenance diet whiles the longan-supplemented group (n=8) received the maintenance diet plus 300 g DM/head/day of longan fruit for 17 days. Blood concentrations of glucose, insulin, progesterone (P4), and estradiol (E2), and follicular population were recorded. After the nutritional treatments, all ewes were synchronized for estrus with controlled intravaginal drug release (CIDR) devices and 400 IU pregnant mare serum gonadotropin. Ewes exhibiting estrus were subjected to assisted natural mating by rams. Ewes fed longan-supplemented diet had greater feed intake than ewes fed the control diet. Glucose concentrations were higher in longan-supplemented than those in control ewes on days 7, 14, and 17. Insulin concentrations were only higher in longan-supplemented group than those in control group on day 17. The longan-supplemented ewes had higher E2 concentrations than non-supplemented ewes on days 14 and 17. On days 14 and 17, numbers of total follicles had significantly greater in longan-supplemented ewes compared with control ewes. Estrous response and conception rate were not different between control and treatment ewes. It was concluded that the 17 days of dietary supplementation stimulate ovary (total follicles) ready to respond to the synchronization of estrus. However, dietary supplementation with longan fruit in ewes prior to the start of the estrus synchronization did not enhance reproductive performance.

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