UVAS Library

Your cart is empty.

Your search returned 2 results. Subscribe to this search

Not what you expected? Check for suggestions
Unhighlight Highlight
|
1.
No cover image available
Development Of Physical And Reproductive Standards For Selection Of Sahiwal Bulls

by Ejaz Ahmad | Prof .Dr. Nasim Ahmad | Prof.Dr.Muhammad Aleem | Prof.Dr.Nuhamm | Faculty of Veterinary Sciences.

Material type: book Book; Format: print Publisher: 2010Dissertation note: The present study is the first, to the best of our knowledge which demonstrate the physical and reproductive criteria for selection of Sahiwal sires to be used in Al. Although the artificial insemination (AT) is being practiced in Pakistan for the last 3-4 decades, however, no significant improvement in milk production has taken place in Sahiwal cattle. Perhaps one of the reasons that Sahiwal bulls used as AT sires were not screened through standard reproductive and productive criteria. Therefore the objectives of the present study were (1) to develop the standards of body weight and scrotal circumference (2) to determine the number of pixels of testes through Ultrasonography from birth until >100 months of age and (3) to develop standards for semen characteristics (volume, motility, concentration, morphology, plasma membrane and acrosome integrity) from puberty until 60 months of age in Sahiwal bulls. This study was carried out at following locations: LES Jhangirabad District Khanewal, SPU Qadirabad District Sahiwal. The study was based on 128 Sahiwal bulls of different age groups (from o to >100 months of age). Bulls were evaluated for scrotal circumference (SC), body weight (BW) and number of pixels of testicular ultrasonograms (NP). Semen was evaluated once a week for 5 consecutive weeks from regularly donor bulls (n = 86) ranging in age from 25-30 to >100 mo. Semen volume, motility, concentration, morphology, percent live sperms, plasma membrane integrity (PMI) and normal acrosome (NAR) were compared between different age groups. Mean SC and BW increased (P<0.05) in a curvilinear manner from birth to >100 mo of age. Mean NP of testicular ultrasonograms increased (P<0.05) from 0 to 24 mo and then plateaued until >100 mo of age. Body weight, SC, and NP were positively correlated with age from birth until >100 mo (r = 0.91, 0.87, 0.40 respectively). Ejaculate volume (5.7 ± 0.2 vs. 4.6 ± 0.09 ml) and sperm concentration (1281.6 ± 17.7 vs. 1115.8 ± 55.9 x 06/ml) increased (P<0.05) in mature bulls compared to younger ones. However, motility (68.6 ± 0.3%), plasma membrane integrity (50.8 ± 1.0%) and normal acrosome (74.8 ± 0.5%) remained insignificant due to age. In six of eight age groups studied morphological abnormalities were well within the range (18.1 ± 0.3%). In conclusion the BW, SC and NP of testicular ultrasonograms, ejaculate volume and concentration increased with age, moreover, semen quality is fairly independent of age except volume and concentration in Sahiwal bulls. These standards could serve as criteria for selecting young bulls as AT sires. Availability: Items available for loan: UVAS Library [Call number: 1074,T] (1).

Place hold Add to cart
2.
No cover image available
Effect Of Used Cidr (Controlled Internal Grug Releasing Device) And Fish Follicle Stumulating Hormone) On Estrus

by Zahid Naseer | Prof.Dr.Nasim Ahmad | Dr.Khalid Javed | Prof.Dr.Muhammad Aleem.

Material type: book Book; Format: print ; Nature of contents: biography; Literary form: Publisher: 2009Dissertation note: Reproductive efficiency is the primary factor affecting productivity in buffaloes, but is greatly hindered by weak estrus symptoms, long postpartum anoestrus and subsequent calving interval. The use of controlled internal drug release (CTDR) devices for the synchronization of estrus in cattle is now well accepted throughout the world. The use of CIDR devices has permitted the opportunity to synchronize estrus in buffaloes efficiently during the low breeding season. The objective of the present study was to determine the effect of once used CIDR and FSH on estrus expression and pregnancy rate (PR) during low breeding season in Nili-Ravi buffaloes. Two experiments were conducted during June-August, 2008. In experiment 1, buffaloes received either a used CIDR (UCIDR, n 26) or a new CIDR (NCTDR, n = 24) for 7 d and PGF2a on d 6. During the experiment, two CIDRs were lost in used CIDR group. At the end of the experiment 48 buffaloes were under observation; UCIDR (n = 22) and NCIDR (n = 26). Estrus detection was done twice daily. Buffaloes were inseminated, 12 and 24 hr after the onset of estrus. Pregnancy diagnosis was performed 45 days post insemination using ultrasonography. Estrus expression was similar (P>0.05) between UCIDR (84.6 1%) and NCIDR (95.45%) buffaloes. The mean interval to estrus from PGF2x in UCIDR was 64.5 1.2 h compared to 68 ± 2.5 h in NCIDR (P>0.05). The pregnancy rate did not differ (P>0.05) due to treatment (34.61% in UCIDR vs. 36.36% in NCIDR). In experiment 2, buffaloes at unknown stages of estrous cycle received CIDRs on d 0 and PGF2a on d 6. Animals were either treated with two injections of FSH (5 I.U. i/rn at 12 hr interval; n = 10) starting at CIDR removal on d 7 or remaind untreated (Control, n 10). At the end 19 buffaloes were under observation because of lost of one CIDR from FSH group. Estrus detection, insemination and pregnancy diagnosis was similar as in experiment 1. FSH treatment did not affect the proportion of buffaloes expressing estrus, mean interval from PGF2a administration to estrus and. ovulation, size of ovulatory follicle or pregnancy rate (P>0.05; overall estrus expression rate (84.2%), interval to estrus from PGF2a (62.8 ± 3.3h) and interval to ovulation from estrus (35 ± 5.6h), ovulatory follicle size (10.55 ± 0.55 mm), pregnancy rate (26.3%). In conclusion, a) compared to NCJDR devices, previously UCIDR devices are equally effective to induce estrus and ovulation synchronization with comparable pregnancy rate in buffaloes during low breeding season and b) low dose FSH treatment at CIDR removal did not improve estrus expression or Availability: Items available for loan: UVAS Library [Call number: 1085,T] (1).

Place hold Add to cart

Implemented and Maintained by UVAS Library.
For any Suggestions/Query Contact to library or Email:[email protected] Phone:+91 99239068
Website/OPAC best viewed in Mozilla Browser in 1366X768 Resolution.