The Effects of altrenogest administration in sows on the variation of piglet birth weight and pre-weaning piglet mortality

Name: Supatee Kitkha

LCSH: Kasetsart University -- Dissertations. Ph.D. (Agricultural Biotechnology) 2017

Classification :.LCCS: SF396.9

LCSH: Kasetsart University. Interdisciplinary Graduate Program -- Dissertations

LCSH: Piglets -- Mortality

LCSH: Piglets -- Growth

Abstract: The heterogeneity of follicular development and ovulation time resulted in higher piglet birth weight (BW) variation, which increased pre - weaning piglet mortality (PWM). Therefore, this study composed of 3 objectives; experiment 1 (Exp. 1) to identify the factors that involve in piglet BW and compare piglet survival rate between birth orders (BO), Exp.2, to evaluate the effects of ALT treatment on the homogeneity of follicular development and reproductive performance and Exp.3, to examine the effects of altrenogest (ALT) treatment accompanied with ovulation induction by human chorionic gonadotropin (hCG) and fixed - time artificial insemination (AI) on piglet BW variation, PWM and pre - weaning performance. Exp. 1 revealed that the higher parity and litter size (LS) had negative effects on piglet BW including the reduction of average BW (AvBW) with a greater variability (p < 0.001). Moreover, the later born piglets had a lower survival rate (p < 0.001). Exp. 2, the sows were assigned into 4 treatments depending on doses and durations of ALT treatment. The results indicated that ALT-4–2 (ALT 20 mg/d, 7 days; D-4–D2; D0 = weaning day) improved follicular growth and homogeneity of follicular size (FS) (p < 0.05). Exp3, the sows were divided into 4 groups depending on ALT treatment and ovulation induction time. The ALT+hCG72 (ALT 20 mg/d, D-4–D2 ; hCG 750 IU intramuscular injection (im) at 72 h post ALT; AI at 24 and 40 h after hCG) treatment in sows could reduce piglet BW variation and the number of eliminated PWM piglets at weaning (p < 0.05). This study demonstrated that in sows, intervention of follicular development and ovulation time could reduce piglet BW variation and PWM in some degrees.

Kasetsart University. Office of the University Library

Address: Bangkok

Email: tdckulib@ku.ac.th

Name: Anuchai Pinyopummin

Role: Thesis Advisor

Created: 2017

Modified: 2023-06-28

Issued: 2023-06-28

วิทยานิพนธ์/Thesis

application/pdf

URL: https://kasetsart.idm.oclc.org/login?url=https://www.lib.ku.ac.th/KUthesis/2560/supatee-kit-all.pdf

CallNumber: SF396.9.S96

eng

DegreeName: Doctor of Philosophy

Level: Doctoral Degree

Descipline: Agricultural Biotechnology

Grantor: Kasetsart University

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