Testicular Function in Boars Exposed to Elevated Ambient Temperature1
نویسندگان
چکیده
منابع مشابه
Influence of elevated ambient temperature on reproductive performance of boars.
Twelve Yorkshire boars were randomly assigned to one of two temperature controlled chambers to determine the influence of elevated ambient temperature on reproductive performance. Heat stressed boars were exposed to 34.5 -+ 1.0 C for 8 hr and 31.0 + 1.0 C for 16 hr daily for 90 days. Control boars were maintained at 23.0 -+ 1.0 C throughout the experimental period. Semen was collected twice wee...
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Responses to elevated CO"2 have not been measured for natural grassland ecosystems. Global carbon budgets will likely be affected by changes in biomass production and allocation in the major terrestrial ecosystems. Whether ecosystems sequester or release excess carbon to the atmosphere will partly determine the extent and rate that atmospheric CO"2 concentration rises. Elevated CO"2 also may ch...
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Antioxidant metabolism is responsive to environmental conditions, and is proposed to be a key component of ozone (O(3)) tolerance in plants. Tropospheric O(3) concentration ([O(3)]) has doubled since the Industrial Revolution and will increase further if precursor emissions rise as expected over this century. Additionally, atmospheric CO(2) concentration ([CO(2)]) is increasing at an unpreceden...
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1. The wetland sedge Scirpus olneyi Gray displays fast rates of CO 2 assimilation and responds positively to increased atmospheric CO 2 concentration. The present study was aimed at identifying the ecophysiological traits specific to S. olneyi that drive these CO 2 -assimilation patterns under ambient and elevated CO 2 conditions. 2. The net ecosystem exchange (NEE) of CO 2 between S. olneyi co...
متن کاملRelationships among measures of testicular development and endocrine function in boars.
Nine blood samples were taken at 30-min intervals from 36 Landrace X Large White boars at each of eight ages (42, 56, 70, 84, 98, 112, 126 and 140 d). Serum concentrations of luteinizing hormone (LH), follicle-stimulating hormone (FSH), testosterone (T) and estradiol-17 beta (E2) were quantified by radioimmunoassay procedures. The maximum concentration of LH and the age at maximum concentration...
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ژورنال
عنوان ژورنال: Biology of Reproduction
سال: 1979
ISSN: 0006-3363,1529-7268
DOI: 10.1095/biolreprod20.2.235