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Growth of Nursing Pigs and Characteristics of Nursed Mammary Gland According to the Anatomical Location
It has been suggested that the anterior mammary glands may be
larger, produce more milk, or provide a more comfortable nursing
position for pigs (Donald, 1937; Gill and Thomson, 1956), whereas
others have suggested that there is no difference in milk production
among glands (Hartman et al., 1962; Pond et al., 1962). The true
advantages for pigs nursing anterior mammary glands remains
uncertain.
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Effect of Lowering Serum Somatoropin and Insulin-Live Growth Factor-I on Puberty and Ovulation Rate in Gilts
We are trying to understand how changes in growth and metabolism interact with ovarian function and thus overall reproductive performance. A com mon link
between these two important processes is the metabolic hormones. Both growth and reproduction are affected by changes in circulating concentrations of
somatotropin (ST) and insulin-like growth factor-I (IGF-I). Pigs with higher blood concentrations of ST and IGF-I because of elevated endogenous production or
exogenous administration deposit more lean and less adipose tissue. What we do not clearly under stand is the effect of elevating ST and IGF-I on reproductive
performance
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Early Farrowing and Colostrum Formation
The physiology underlying the formation of colostrum and the development of the lactation function in the mammary gland of the
sow is in close synchrony with birth of the young pig. This is necessary so that colostrum is available at the time of birth when the
newborn pig is critically dependent on the colostrum. What happens when this synchrony between farrowing and colostrum formation
becomes disrupted?
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Production and Reproduction Responses in Boars Divergently Selected for Testosterone Levels
The production of faster growing, more efficient, leaner pigs is of primary interest in the swine industry. Boars grow faster, convert feed more effi ciently and have
less fat than barrows. The higher rate of gain seen in intact males relative to castrates is related to differences in endogenous testosterone levels. Positive
correlations exist between growth and blood concentrations of testosterone. The early determination of testosterone levels in addition to other criteria represents a
novel approach to identify superior breeding animals.
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GHANA - Agric News
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