Effect of Synthetic Thyroprotein on Seasonal Variation in Volume and Concentration of Cock Semen ,

Huston, Till M.; Wheeler, Robert S.

doi:10.3382/ps.0280262

Cited by 10 publications

(5 citation statements)

References 24 publications

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“…Wilson (1949) showed that fertility in the female was not seriously affected by high temperatures. It has been demonstrated by others, however, that the fertilizing capacity of the cock declines during hot weather (Parker and McSpadden, 1943;Huston and Wheeler, 1949). Huston and Carmon (1958) found no statistically significant differences in fertility between cocks held at high (90°F.)…”

mentioning

confidence: 86%

Effects of High Temperature on Semen Production and Fertility in the Domestic Fowl

Boone

Huston

1963

Poultry Science

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mentioning

confidence: 86%

Effects of High Temperature on Semen Production and Fertility in the Domestic Fowl

Boone

Huston

1963

Poultry Science

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“…Semen quality has been found to decline during hot weather (Huston and Wheeler, 1949;Boone and Huston, 1963). Other factors affecting semen production or quality include dietary deficiencies such as starvation (Boone et al, 1967), vitamin E or essential fatty acid deficiency (Jensen, 1968), levels of toxins such as alflatoxin (Briggs et al, 1972), abnormally high levels of iodine Wilson, et al, 1971;Wilson et al, 1965), but not by dietary calcium levels (Wilson et al, 1969a).…”

Section: Other Parameters Affecting Fertility Semen Production and Bmentioning

confidence: 99%

Prediction of the Fertility Potential of Broiler Breeder Males

Wilson¹,

Piesco²,

Miller³

et al. 1979

World's Poultry Science Journal

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Semen Quality Characteristics and FertilityThe selection of males for breeder flocks is usually based on such characteristics as posture, body conformation, maturity, body size, ~~~~ ~ ~ ~ *Ha. Agr. Exp. Sta. Journal Series No. 1062. 95 96condition of the legs and feet, appearance of the head, general health and vigour, and appearance of eyes. Although these characteristics are useful in selecting males they do not assure that high fertility will be obtained. Several attempts have been made to relate various semen quality characteristics to fertility. There is much disagreement in the literature, however, regarding the importance and reliability of semen traits in predicting fertility. Differences can, of course, be expected between the results obtained from natural mating and artificial insemination. Although measurements of semen traits have been succcssful in detecting sterile birds, the prediction of fertilizing capacity appears to be complex and influenced by numerous factors other semen quality.In order to make fertility predictions or male breeding worth predictions based on semen evaluation, high correlations between semen characteristics and fertility must be found. Then a statistical model may be fitted using the semen quality values as independent variables to define the dependent variable, fertility. In addition, when attempting to obtain an estimate of fertility or breeding potential, one must keep in mind that it is influenced by genetical, physiological and social factors.Semen quality characteristics are generally believed to be inherited (Lake, 1971; Marini and Goodman, 1969) and differences in semen characteristics and fertility have been reported between breeds (Parker et al., 1942;Allen and Champion, 1955; Taneja and Gowe, 1961 a and b;McDaniel and Craig, 1962), between inbred lines (Williams and McGibbon, 1956; De-Silva, 1963) and between families (Boone, 1968).Heritability values for such traits as semen quantity, concentration and motility were found to be high (Soller et al. 1965b) as were the repeatabilities of such measurements. Nestor and Brown (1976a) reported that measurements of semen quality made early in the reproductive life of the male were not closely correlated with subsequent evaluations and did not permit accurate prediction of future semen production. Nestor (1976) successfully selected turkeys for increased semen yield, however, there were no consistent changes in percent fertility, percent hatchability of fertile eggs or number of poults per hen associated with the increases in semen yield. Some success also has been reported for the selection for fertility when using frozen chicken semen (Scott et al., 1977).Concentration of spermatozoa in semen has been claimed to be significantly related to fertility (following AI), having a correlation coefficient of 321 (Kamar, 1960) and .481 (Boone, 1968). Others have presented data indicating that it is not significantly related to fertility (

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“…Huston and Carmon (1958) found no significant differences in fertilizing capacity of males held at 31.7 C and those held at normal variable temperatures. However, others, including Parker and McSpadden (1943) and Huston and Wheeler (1949), found that the fertilizing capacity of the cock declines in hot weather. …”

Section: Resultsmentioning

confidence: 95%

Effects of Ambient Temperature on Sexual Maturity in Chickens

Boone

Hughes

et al. 1980

Poultry Science

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Ninety-six, 14-day-old Single Comb White Leghorns (48 males and 48 females) in each of two trials were divided into three groups and grown thereafter under one of the ambient temperatures of 21, 29, or 35 C. Age at sexual maturity of males was decreased in both trials as temperature was increased. First semen was produced at 54 and and 56 days of age in Trials 1 and 2, respectively, when the ambient temperature was 35 C and 68 and 63 days at 21 C for Trials 1 and 2, respectively. Sexual maturity of females was significantly delayed at the highest ambient temperature. Semen quality was only slightly affected by the highest ambient temperature. Although egg production was seriously affected at 35 C, fertility and hatchability, except in a few instances, were only mildly affected.

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Effect of Synthetic Thyroprotein on Seasonal Variation in Volume and Concentration of Cock Semen ,

Cited by 10 publications

References 24 publications

Effects of High Temperature on Semen Production and Fertility in the Domestic Fowl

Effects of High Temperature on Semen Production and Fertility in the Domestic Fowl

Prediction of the Fertility Potential of Broiler Breeder Males

Effects of Ambient Temperature on Sexual Maturity in Chickens

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