EFFECT OF UNSATURATED FATTY ACIDS IN PRE-MATING DIETS ON NUMBER AND SIZE OF OVARIAN FOLLICLES AND REPRODUCTIVE PERFORMANCE AFSHARI EWES

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MOHAMMADI Z.; MIRZAEI ALAMOUTI H.R.; SHAHIR M.H.; AMANLOU H.; YAVARI M.

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ISSN: 2588-4824

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Journal: IRANIAN JOURNAL OF VETERINARY CLINICAL SCIENCES Year:2016 | Volume:9 | Issue:2 Page(s): 21-30

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Title

EFFECT OF UNSATURATED FATTY ACIDS IN PRE-MATING DIETS ON NUMBER AND SIZE OF OVARIAN FOLLICLES AND REPRODUCTIVE PERFORMANCE AFSHARI EWES

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Keywords

POLYUNSATURATED FATTY ACIDQ2

PRE-MATINGQ2

FOLLICLEQ2

REPRODUCTIVE PERFORMANCEQ3

EWEQ2

Abstract

In order to investigate the noncaloric effect of some fat supplements in PRE-MATING diets on the number and size of ovarian FOLLICLEs and REPRODUCTIVE PERFORMANCE EWEs, thirty two Afshari EWEs were synchronized for estrus during breeding season and were assigned to four diets in a completely randomized design. Experimental rations were regulated with 3% supplemental fat Sunflower oil (SFO), Fish oil (FO), Calcium salt of palm oil (CaPO) and an equal blend of SFO+FO with similar Metabolisable Energy (2.43 Mcal/kg). EWEs were adapted with basal diet for 12 days and then received the experimental diets for two weeks. Ultrasonography was conducted on ovaries in CIDR removal and mating days (estrus) to study the number and size of FOLLICLEs. Adding fish oil increased number of large FOLLICLEs in days CIDR removal (1.50mm) and mating (2.25mm) and also increased size of large FOLLICLEs in day mating (5.70mm). Mixture of unsaturated oils reduced the number and size of FOLLICLEs compared to using them alone in PRE-MATING diets (P<0.05). Lambing (175%) and twining rate (75%) were highest in EWEs fed FO and lowest (114.3% and 33.3% respectively) in EWEs fed SFO+FO (P<0.05). Generally, in this experiment unsaturated oils especially fish oil alone in premating diets increased the number and size of large FOLLICLEs and subsequently improved lambing and twining.

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