Document Detail


Effect of nutritional supplementation upon pregnancy rates of goats under semiarid rangelands and exposed to the male effect.
MedLine Citation:
PMID:  22311376     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The aim of this study was to evaluate possible effects of improved protein and energy diet upon reproductive outcomes of adult goats under marginal rangeland grazing conditions and exposed to the male effect during the anoestrous-dry season. Adult goats (Nubian × Criollo, nonpregnant, nonlactating, n = 160, 22° 50' N, 100° 59' W, 1,653 m) were randomly divided in two experimental groups: Control (CG; n = 80) and Supplemented (SG; n = 80). Both CG and SG goats were kept together during the day for ranging a semiarid rangeland while separated accordingly at night. SG goats were individually supplemented [400 g kg(-1) day(-1) ; 14% CP and 2.92 Mcal DE kg(-1)] during a 30-day period. Thereafter, both the CG [35.5 ± 0.94 kg LW, 1.95 ± 0.06 U, body condition score (BCS)] and the SG [39.5 ± 0.94 kg LW, 2.29 ± 0.06 BCS] were exposed to adult males (Nubian, n = 4, two per group) of proven libido and fertility and kept together at night (1700-0900) during a 42-day experimental breeding period. At the beginning of the breeding period, both LW (P < 0.001) and BCS (P < 0.001) were higher in the SG, which was also reflected in higher pregnancy rate (92.5 vs. 76.3%, P < 0.01). Nonetheless, both CG and SG depicted an increased abortion rate (52.5 vs. 41.9% P > 0.05), respectively. Results suggest that nutritional supplementation and the male effect were able to successfully invoke neurophysiological pathways to increase ovarian activity and to promote a uterine milieu prone to the establishment of pregnancy during the anoestrus season. However, the increased abortion rates observed in the study occurred irrespective of the nutritional regime offered during the premating stage. Therefore, there is a need to align the last third of gestation to the onset of the grazing season in order to increase reproductive and economic efficiency in those rangeland-based marginal goat production systems.
Authors:
Jorge Urrutia-Morales; Cesar A Meza-Herrera; Leonardo Tello-Varela; Marta O Díaz-Gómez; Sergio Beltrán-López
Related Documents :
18530566 - Articulatory constaints on coarticulation in fricatives as a function of tongue involve...
25198256 - Fetal surgery: principles, indications, and evidence.
22313256 - Birth and clinical pregnancy from fresh and frozen oocytes fertilized with cryopreserve...
10497796 - Heritability of hand preference in chimpanzees (pan troglodytes): evidence from a parti...
1395686 - In vitro fertilization and development of frozen-thawed bovine oocytes.
21355466 - Twin pregnancy after in vitro fertilization in a woman with a unicornuate uterus.
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-2-5
Journal Detail:
Title:  Tropical animal health and production     Volume:  -     ISSN:  1573-7438     ISO Abbreviation:  -     Publication Date:  2012 Feb 
Date Detail:
Created Date:  2012-2-7     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  1277355     Medline TA:  Trop Anim Health Prod     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias, San Luis Potosí, Mexico.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Exploring physical activity level in patients with thoracic cancer: implications for use as an outco...
Next Document:  Immunohistochemical expression of p16, p21, p27 and cyclin D1 in oral nevi and melanoma.