| Relationships of barometric pressure and environmental temperature with incidence of parturition in beef cows. | |
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MedLine Citation:
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PMID: 22147487 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The relationship between barometric pressure (BARO) and maximum (MAX_T) and minimum (MIN_T) environmental temperatures with the incidence of parturition in beef cows was examined through exploratory data analysis. Spring- and fall-calving records from a 5-yr period (2005 through 2009) collected at the University of Arkansas, Livestock and Forestry Research Station (Batesville, AR) and Department of Animal Science Savoy Research Unit (Savoy, AR) were used. All cows were multiparous, predominately Angus, and naturally bred. During this period, 2,210 calves were born over a cumulative 1,547 d. Local weather station BARO and MAX_T and MIN_T data were obtained from the Southern Regional Climate Center, Louisiana State University, Baton Rouge, LA. The combined calving record and climate variables were used to determine differences in BARO, MAX_T, and MIN_T on d 0 (d of calving) and -1, -2, or -3 (d before calving, respectively) calving occurred (CALF) or did not occur (NOCALF). Location and season also were included in the model. For fall-calving cows, BARO on d 0 and -1, -2, or -3 was not different between CALF and NOCALF (P > 0.10). For spring-calving cows, BARO on d 0, -1, -2, and -3 was greater (P < 0.05) for CALF compared with NOCALF. The MAX_T was greater on d -1 (24.4° vs. 22.9°C) and -3 (24.8° vs. 23.4°C) for CALF in the fall compared with NOCALF (P < 0.05). No differences were detected in the fall for MAX_T on d 0 or -2 (P > 0.10). In the spring, lesser MAX_T was associated with CALF. Maximum environmental temperatures on d 0 (14.7° vs. 16.0°C), -1 (14.4° vs. 16.0°C), and -3 (14.0° vs. 15.7°C), were lesser for CALF compared with NOCALF (P < 0.05). No difference was detected on d -2 (P > 0.10). For fall, MIN_T was greater on d -1 (12.8° vs. 11.3°C), -2 (13.0° vs. 11.4°C), and -3 (13.1° vs. 11.7°C) for CALF compared with NOCALF (P < 0.05). In spring, MIN_T for d 0 (2.6° vs. 3.9°C), -1 (2.5° vs. 3.7°C), -2 (2.1° vs. 3.7°C), and -3 (1.8° vs. 3.8°C) were lesser (P < 0.05) for CALF verses NOCALF. These data indicate for spring-calving cows, a higher BARO and decrease in MAX_T and MIN_T was associated with CALF; whereas, for fall-calving cows an increase in MAX_T and MIN_T was associated with CALF. Therefore, monitoring weather conditions may assist producers in preparing for the obstetric assistance of beef cattle. |
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Authors:
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T R Troxel; M S Gadberry |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-12-6 |
Journal Detail:
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Title: Journal of animal science Volume: - ISSN: 1525-3163 ISO Abbreviation: - Publication Date: 2011 Dec |
Date Detail:
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Created Date: 2011-12-7 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8003002 Medline TA: J Anim Sci Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Animal Science, Division of Agriculture, University of Arkansas, Little Rock, AR 72204. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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