R V Knox

Summary

Affiliation: University of Illinois
Country: USA

Publications

  1. ncbi request reprint Effects of altering the dose and timing of triptorelin when given as an intravaginal gel for advancing and synchronizing ovulation in weaned sows
    R V Knox
    Department of Animal Science, University of Illinois, Urbana, Illinois, USA Electronic address
    Theriogenology 82:379-86. 2014
  2. ncbi request reprint Impact of swine reproductive technologies on pig and global food production
    Robert V Knox
    Department of Animal Sciences, University of Illinois, 360 Animal Sciences Laboratory, 1207 West Gregory Drive MC 630, Urbana, IL, 61801, USA
    Adv Exp Med Biol 752:131-60. 2014
  3. doi request reprint An analysis of survey data by size of the breeding herd for the reproductive management practices of North American sow farms
    R V Knox
    Department of Animal Sciences, University of Illinois at Champaign Urbana, Urbana, IL 61801, USA
    J Anim Sci 91:433-45. 2013
  4. doi request reprint Synchronization of ovulation and fertility in weaned sows treated with intravaginal triptorelin is influenced by timing of administration and follicle size
    R V Knox
    Department of Animal Science, University of Illinois, 360 Animal Science Lab, 1207 West Gregory Drive, MC 630 Urbana, Illinois, USA
    Theriogenology 75:308-19. 2011
  5. doi request reprint The current value of frozen-thawed boar semen for commercial companies
    R V Knox
    Department of Animal Sciences, University of Illinois, Champaign Urbana, IL 61801, USA
    Reprod Domest Anim 46:4-6. 2011
  6. ncbi request reprint Administration of p.g. 600 to sows at weaning and the time of ovulation as determined by transrectal ultrasound
    R V Knox
    Department of Animal Sciences, University of Illinois, Urbana 61801, USA
    J Anim Sci 79:796-802. 2001
  7. ncbi request reprint Effect of PG600 and adjusted mating times on reproductive performance in weaned sows
    S M Breen
    Department of Animal Sciences, University of Illinois, 360 Animal Science Laboratory, 1207 West Gregory Drive, Champaign Urbana, IL 61801 3939, USA
    Anim Reprod Sci 93:157-64. 2006
  8. ncbi request reprint Effect of altering dose of PG600 on reproductive performance responses in prepubertal gilts and weaned sows
    S M Breen
    Department of Animal Sciences, University of Illinois, Champaign Urbana, IL 61801 3939, USA
    Anim Reprod Sci 95:316-23. 2006
  9. ncbi request reprint Effect of housing system and boar exposure on estrus expression in weaned sows
    R V Knox
    Department of Animal Sciences, University of Illinois, Urbana 61801, USA
    J Anim Sci 82:3088-93. 2004
  10. ncbi request reprint Effect of subcutaneous vs intramuscular administration of P.G. 600 on estrual and ovulatory responses of prepubertal gilts
    R V Knox
    Department of Animal Sciences, University of Illinois, Champaign Urbana 61801 3939, USA
    J Anim Sci 78:1732-7. 2000

Collaborators

Detail Information

Publications20

  1. ncbi request reprint Effects of altering the dose and timing of triptorelin when given as an intravaginal gel for advancing and synchronizing ovulation in weaned sows
    R V Knox
    Department of Animal Science, University of Illinois, Urbana, Illinois, USA Electronic address
    Theriogenology 82:379-86. 2014
    ..The results of these studies indicate that 200 μg of TG given intravaginally at 96 hours after weaning (OvuGel) synchronizes ovulation and results in fertility similar to Controls. ..
  2. ncbi request reprint Impact of swine reproductive technologies on pig and global food production
    Robert V Knox
    Department of Animal Sciences, University of Illinois, 360 Animal Sciences Laboratory, 1207 West Gregory Drive MC 630, Urbana, IL, 61801, USA
    Adv Exp Med Biol 752:131-60. 2014
    ..In all cases, the adoption of these technologies has aided in the creation of a sustainable supply of safe and affordable pork for consumers around the world [den Hartog, Adv Pork Prod 15:17-24, 2004]. ..
  3. doi request reprint An analysis of survey data by size of the breeding herd for the reproductive management practices of North American sow farms
    R V Knox
    Department of Animal Sciences, University of Illinois at Champaign Urbana, Urbana, IL 61801, USA
    J Anim Sci 91:433-45. 2013
    ..These results suggest that reproductive management of farms in key areas related to weaning, breeding, gestation, and labor use could be a source of variation in reproductive performance...
  4. doi request reprint Synchronization of ovulation and fertility in weaned sows treated with intravaginal triptorelin is influenced by timing of administration and follicle size
    R V Knox
    Department of Animal Science, University of Illinois, 360 Animal Science Lab, 1207 West Gregory Drive, MC 630 Urbana, Illinois, USA
    Theriogenology 75:308-19. 2011
    ..However, ovulation induction and timed AI success may benefit from an approach that ensures sows have adequate follicle development at time of treatment...
  5. doi request reprint The current value of frozen-thawed boar semen for commercial companies
    R V Knox
    Department of Animal Sciences, University of Illinois, Champaign Urbana, IL 61801, USA
    Reprod Domest Anim 46:4-6. 2011
    ....
  6. ncbi request reprint Administration of p.g. 600 to sows at weaning and the time of ovulation as determined by transrectal ultrasound
    R V Knox
    Department of Animal Sciences, University of Illinois, Urbana 61801, USA
    J Anim Sci 79:796-802. 2001
    ..In summary, P.G. 600 enhanced the expression of estrus and ovulation in weaned sows but, breeding protocols may need to be optimized for time of ovulation based on the interval from weaning to estrus...
  7. ncbi request reprint Effect of PG600 and adjusted mating times on reproductive performance in weaned sows
    S M Breen
    Department of Animal Sciences, University of Illinois, 360 Animal Science Laboratory, 1207 West Gregory Drive, Champaign Urbana, IL 61801 3939, USA
    Anim Reprod Sci 93:157-64. 2006
    ..Overall, these data suggest that for sows injected with PG600 at weaning and receiving two AI, breeding at 0 h and 24h after onset of estrus is recommended...
  8. ncbi request reprint Effect of altering dose of PG600 on reproductive performance responses in prepubertal gilts and weaned sows
    S M Breen
    Department of Animal Sciences, University of Illinois, Champaign Urbana, IL 61801 3939, USA
    Anim Reprod Sci 95:316-23. 2006
    ..Reducing dose of PG600 for weaned sows did not alter estrus or ovulation, but the 0.5x dose increased farrowing rate compared to no PG600...
  9. ncbi request reprint Effect of housing system and boar exposure on estrus expression in weaned sows
    R V Knox
    Department of Animal Sciences, University of Illinois, Urbana 61801, USA
    J Anim Sci 82:3088-93. 2004
    ..In addition, refractory behavior occurs in approximately 30 to 40% of sows and is influenced by housing relative to the boar, day of estrus, and interval from last boar exposure...
  10. ncbi request reprint Effect of subcutaneous vs intramuscular administration of P.G. 600 on estrual and ovulatory responses of prepubertal gilts
    R V Knox
    Department of Animal Sciences, University of Illinois, Champaign Urbana 61801 3939, USA
    J Anim Sci 78:1732-7. 2000
    ..Results of this study indicated that s.c. administration of P.G. 600 significantly improved the induction of estrus in prepubertal gilts compared to i.m. administration...
  11. ncbi request reprint Impact of biological and economic variables on optimal parity for replacement in swine breed-to-wean herds
    S L Rodriguez-Zas
    Departments of Animal Sciences, University of Illinois at Urbana Champaign, Urbana, Illinois 61801, USA
    J Anim Sci 84:2555-65. 2006
    ..However, the optimization process should be a dynamic one that adapts to changes in replacement rates, salvage value, replacement cost, and revenues per piglet...
  12. ncbi request reprint Effect of estrogen formulation and its site of deposition on serum PGFM concentrations, uterine contractility, and time of ovulation in artificially inseminated weaned sows
    K L Willenburg
    Department of Animal Sciences, University of Illinois, Urbana, IL, USA
    Anim Reprod Sci 80:147-56. 2004
    ....
  13. ncbi request reprint Influence of hormone supplementation to extended semen on artificial insemination, uterine contractions, establishment of a sperm reservoir, and fertility in swine
    K L Willenburg
    Department of Animal Sciences, University of Illinois, Urbana 61801, USA
    J Anim Sci 81:821-9. 2003
    ..Therefore, in situations of lowered fertility, hormone addition could be a strategy to limit infertility in swine...
  14. ncbi request reprint Factors influencing estrus and ovulation in weaned sows as determined by transrectal ultrasound
    R V Knox
    Department of Animal Sciences, University of Illinois, Urbana 61801, USA
    J Anim Sci 79:2957-63. 2001
    ..The data suggest lactation length, early return to estrus, and parity by season effects are associated with risk of failure to express estrus and ovulate...
  15. ncbi request reprint Bioeconomic evaluation of sow longevity and profitability
    S L Rodriguez-Zas
    Department of Animal Sciences, University of Illinois at Urbana Champaign, Urbana 61801, USA
    J Anim Sci 81:2915-22. 2003
    ..These results suggest that the magnitude of the economic improvement attained through the use of sow genetic lines with longer longevity depends on the economic context under which the evaluation is made...
  16. ncbi request reprint Effect of age and physical or fence-line boar exposure on estrus and ovulation response in prepubertal gilts administered PG600
    S M Breen
    Department of Animal Sciences, University of Illinois, Urbana 61801 3939, USA
    J Anim Sci 83:460-5. 2005
    ..The administration of PG600 to 180-d-old gilts in conjunction with 4 d prior fence-line boar exposure may improve induction of estrus, ovulation, and decrease age at puberty...
  17. ncbi request reprint Effect of boar exposure at time of insemination on factors influencing fertility in gilts
    K L Willenburg
    Department of Animal Sciences, University of Illinois, Urbana 61801, USA
    J Anim Sci 81:9-15. 2003
    ....
  18. ncbi request reprint Effect of frequency of boar exposure and adjusted mating times on measures of reproductive performance in weaned sows
    R V Knox
    Department of Animal Sciences, University of Illinois, Urbana 61801, USA
    J Anim Sci 80:892-9. 2002
    ..2) and 3X (10.7) numbers were greater than 1X (10.0). It appears that once-daily estrus detection combined with delayed mating could achieve optimal reproductive performance...
  19. doi request reprint Effect of variability in lighting and temperature environments for mature gilts housed in gestation crates on measures of reproduction and animal well-being
    D C Canaday
    Department of Animal Sciences, University of Illinois, Urbana Champaign 61801, USA
    J Anim Sci 91:1225-36. 2013
    ..However, room temperature does impact physiological, behavioral, and immune responses of mature gilts and should be considered as a potential factor that may influence gilt well-being during the first 30 d postbreeding...
  20. ncbi request reprint Recruitment and selection of ovarian follicles for determination of ovulation rate in the pig
    R V Knox
    Department of Animal Sciences, 360 Animal Sciences Laboratory, 1207 West Gregory Drive, University of Illinois, Urbana, IL 61801, USA
    Domest Anim Endocrinol 29:385-97. 2005
    ..Therefore, FSH appears to be involved in the maintenance of a pool of medium follicles that can be selected by LH to mature and ovulate...