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פותח על ידי קלירמאש פתרונות בע"מ -
Seasonal variation in semen characteristics and the fertility of finn cross rams subjected to frequent ejaculation
Year:
1986
Source of publication :
Animal Reproduction Science
Authors :
אמיר, דוד
;
.
גסיטוע, חיים
;
.
לרר, רמי
;
.
רון, מיכה
;
.
Volume :
10
Co-Authors:
Amir, D., Institute of Animal Science, A.R.O., The Volcani Center, P.O.B. 6, Bet Dagan, Israel
Gacitua, H., Institute of Animal Science, A.R.O., The Volcani Center, P.O.B. 6, Bet Dagan, Israel
Ron, M., Institute of Animal Science, A.R.O., The Volcani Center, P.O.B. 6, Bet Dagan, Israel
Lehrer, A.R., Institute of Animal Science, A.R.O., The Volcani Center, P.O.B. 6, Bet Dagan, Israel
Facilitators :
From page:
75
To page:
84
(
Total pages:
10
)
Abstract:
Three Finn cross rams were put on a daily regime of five successive ejaculations for 17 consecutive days in June, August-September, November-December and March. The semen characteristics of the first and fifth ejaculates, and the fertility of the ewes receiving these ejaculates, were examined. Ewes were inseminated once, either naturally or artificially, 51-54 hours after the end of a hormone treatment for synchronization or induction of oestrus. The semen volume, sperm density, sperm number and the percentage of abnormal spermatozoa decreased from the first to the fifth ejaculate from 0.58 to 0.49 ml; 3.6 to 2.9 × 109; 2.2 to 1.5 × 109; and from 13.9% to 11.1%, respectively. A significant season × ejaculate interaction on sperm density and number was found. The sperm density, sperm number and percentage of abnormal spermatozoa also decreased in the course of the 17-day experimental periods (b = -0.058 × 109, -0.039 × 109, and -0.28%, respectively). The mean percentage of abnormal spermatozoa of the first and fifth ejaculates was higher in March (20.8%) than in June (7.1%), August-September (8.5) and November-December (13.5%). The fertility of the sperm, assessed by the lambing rates of the ewes, was not significantly different after artificial insemination (53.0%) from that obtained after natural service (61.7%); during the first days (45.0%) from that found during the last days (53.2%) of the 17-day experimental periods; and of the first ejaculate (54.4%) from the fertility of the fifth ejaculate (59.5%). A significant decrease was observed in sperm fertility in March (36% lambing rate vs 54-70% in the other seasons). It is concluded that an ejaculation frequency of five successive ejaculations for 17 consecutive days does not affect the fertility of Finn cross rams, irrespective of the season of semen collection. © 1986.
Note:
Related Files :
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/0378-4320(86)90141-7
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
31685
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:04
Scientific Publication
Seasonal variation in semen characteristics and the fertility of finn cross rams subjected to frequent ejaculation
10
Amir, D., Institute of Animal Science, A.R.O., The Volcani Center, P.O.B. 6, Bet Dagan, Israel
Gacitua, H., Institute of Animal Science, A.R.O., The Volcani Center, P.O.B. 6, Bet Dagan, Israel
Ron, M., Institute of Animal Science, A.R.O., The Volcani Center, P.O.B. 6, Bet Dagan, Israel
Lehrer, A.R., Institute of Animal Science, A.R.O., The Volcani Center, P.O.B. 6, Bet Dagan, Israel
Seasonal variation in semen characteristics and the fertility of finn cross rams subjected to frequent ejaculation
Three Finn cross rams were put on a daily regime of five successive ejaculations for 17 consecutive days in June, August-September, November-December and March. The semen characteristics of the first and fifth ejaculates, and the fertility of the ewes receiving these ejaculates, were examined. Ewes were inseminated once, either naturally or artificially, 51-54 hours after the end of a hormone treatment for synchronization or induction of oestrus. The semen volume, sperm density, sperm number and the percentage of abnormal spermatozoa decreased from the first to the fifth ejaculate from 0.58 to 0.49 ml; 3.6 to 2.9 × 109; 2.2 to 1.5 × 109; and from 13.9% to 11.1%, respectively. A significant season × ejaculate interaction on sperm density and number was found. The sperm density, sperm number and percentage of abnormal spermatozoa also decreased in the course of the 17-day experimental periods (b = -0.058 × 109, -0.039 × 109, and -0.28%, respectively). The mean percentage of abnormal spermatozoa of the first and fifth ejaculates was higher in March (20.8%) than in June (7.1%), August-September (8.5) and November-December (13.5%). The fertility of the sperm, assessed by the lambing rates of the ewes, was not significantly different after artificial insemination (53.0%) from that obtained after natural service (61.7%); during the first days (45.0%) from that found during the last days (53.2%) of the 17-day experimental periods; and of the first ejaculate (54.4%) from the fertility of the fifth ejaculate (59.5%). A significant decrease was observed in sperm fertility in March (36% lambing rate vs 54-70% in the other seasons). It is concluded that an ejaculation frequency of five successive ejaculations for 17 consecutive days does not affect the fertility of Finn cross rams, irrespective of the season of semen collection. © 1986.
Scientific Publication
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