Sperm Morphology and Viability

Kamar, G. A. R.; Badreldin, A. L.

doi:10.1159/000141546

Cited by 10 publications

(10 citation statements)

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“…It was noted that the period of highest ejaculatory responsiveness coincided almost exactly with the period of highest sperm concentrations, sperm abnor¬ malities and sexual activity. The large numbers of abnormalities were pre¬ sumably a reflection of the large numbers of spermatozoa produced and the high sexual activity which did not allow the spermatids to be retained for Kamar & Badreldin (1959b) have suggested that spermatozoa with abnormal heads are always dead cells. The somewhat higher values recorded in this study for the semen charac¬ teristics of the Beltsville Small White, compared with the Bronze, turkeys may be due to their greater adaptability to hot climates.…”

Section: Discussionmentioning

confidence: 99%

“…Ejaculatory responsiveness was measured by the percentage of successful trials. Semen volume (ml), motility (rating score- Kamar, 1960), concentration (spermatozoa/mm3), percentage live spermatozoa (Kamar, 1959a), percentage abnormal spermatozoa (Kamar, 1959b), total number of spermatozoa, number of live spermatozoa, and number of abnormal sperma¬ tozoa/ejaculate were estimated by the methods previously used for fowl [Gallus domesticus).…”

Section: Methodsmentioning

confidence: 99%

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Semen Characteristics of Two Breeds of Turkeys

Kamar¹,

Rizik²

1972

Reproduction

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Semen samples were collected from ten Bronze and ten Beltsville Small White turkeys by the massage method without milking the copulatory organ. The birds were kept under natural conditions at Giza, Egypt (lat. 30\s=deg\N). Four collections were tested each month throughout 1 year. The collections of alternate weeks were used for studying the physical and chemical characteristics respectively. The largest volumes of semen were produced between March and October, and the smallest between November and February. The best semen quality was recorded between November and April, and the poorest between May and August. A sharp decline in all semen characteristics occurred during May. If the causes of this decline can be avoided, the time of obtaining best semen qualities is prolonged. The semen production of Beltsville Small White turkeys was better than that of the Bronze breed. Wide seasonal variations in types of sperm abnormality were observed.Seminal fructose and vitamin C were high between November and April, and low from May to August. Semen quality was directly related to levels of seminal fructose and vitamin C. Slight seasonal and monthly variations were observed in inorganic phosphate levels. The rate of fructose metabolism by the spermatozoa was high during the first hour and decreased consistently thereafter. The large quantity of carbon dioxide produced during the first hour depressed sperm viability.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Semen Characteristics of Two Breeds of Turkeys

Kamar¹,

Rizik²

1972

Reproduction

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show abstract

“…For instance, in the chicken (Cecil and Bakst, 1986) and the northern pintail (Penfold et al, 2000), the number of morphologically normal sperm increased as the season progressed, while higher number of abnormal sperms were mostly observed at the beginning of the breeding season. The rapid production of morphologically normal sperm is likely to be important for reproductive success as a high number of morphologically abnormal sperms correlate well with infertility (Kamar and Baldredin, 1959;Wishart and Palmer, 1986;Soley et al, 1991). In that sense, we observed higher number of abnormal and dead sperms at the beginning of the breeding season (which also correspond to winter months), while lower numbers were observed later on.…”

Section: Monthmentioning

confidence: 99%

Predicting ejaculate quality and libido in male ostriches: Effect of season and age

Bonato

Malecki

Rybnik-Trzaskowska

et al. 2014

Animal Reproduction Science

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“…Samples from one single comb male were grossly abnormal and have been omitted from the comparison. Abnormal sperm were classified following the descriptions given by Kamar and Badreldin (1959). Since the proportions of each type of abnormality were very small and did not differ among the groups, they have been combined in the summary.…”

Section: Exchanging Seminal Plasmasmentioning

confidence: 99%