Article: The effects of time and dose of pregnant mare serum gonadotropin (PMSG) on reproductive efficiency in hair sheep ewes
Tropical animal health and production. 2011 Dec., v. 43, no. 8
2011
Abstract: The aim of this study was to evaluate the effects of dose and application time of pregnant mare serum gonadotropin (PMSG) on reproductive performance of hair sheep ewes synchronized with fluorogesterone acetate (FGA) under tropical conditions of ... ...
| Abstract | The aim of this study was to evaluate the effects of dose and application time of pregnant mare serum gonadotropin (PMSG) on reproductive performance of hair sheep ewes synchronized with fluorogesterone acetate (FGA) under tropical conditions of Northeastern Mexico. Ninety-nine hair ewes (63 Blackbelly and 36 Pelibuey) were treated with intravaginal sponges during 10 days. After insertion of FGA sponges, ewes were divided into four groups, and PMSG was injected intramuscularly at doses of 100, 200, and 400 IU. Relative to FGA sponge removal, PMSG was administrated at −48 h, −24 h, and at sponge removal. PMSG was not administered to the control group. Control ewes had similar (P > 0.05) lambing rate, fertility, and fecundity than those treated with 100 IU of PMSG, but lower (P < 0.05) percentages to these variables than those treated with 200 and 400 IU of PMSG. Time to estrus decreased linearly, and ovulation rate increased quadratically as PMSG dose increased (0 to 400 IU). Administration of PMSG before sponge removal increased (P < 0.01) response to estrus and decreased (P < 0.01) interval to estrus compared with control. Ovulation rate, lambing rate, fertility, and fecundity were not affected (P > 0.05) by administration time of PMSG. Both dose and time of PMSG application did not affect (P > 0.05) pregnancy rate, percentage of single and multiple lambing, and prolificacy. In conclusion, results show that the dose of 400 IU of PMSG administered before sponge withdrawal in an estrus synchronization protocol improved reproductive efficiency of hair sheep ewes. |
|---|---|
| Keywords | acetates ; application timing ; controlled internal drug release devices ; estrus ; estrus synchronization ; ewes ; fecundity ; hairs ; lambing ; lambing rate ; ovulation ; pregnancy rate ; pregnant mare serum gonadotropin ; reproductive efficiency ; Mexico |
| Language | English |
| Dates of publication | 2011-12 |
| Size | p. 1567-1573. |
| Publishing place | Springer-Verlag |
| Document type | Article |
| ZDB-ID | 603363-5 |
| ISSN | 1573-7438 ; 0049-4747 |
| ISSN (online) | 1573-7438 |
| ISSN | 0049-4747 |
| DOI | 10.1007/s11250-011-9843-z |
| Database | NAL-Catalogue (AGRICOLA) |
Full text online
More links
Kategorien
In stock of ZB MED Bonn / Germany
| Z 2667: Show issues |
Order via subito
This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.
Inter-library loan at ZB MED
Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.