Robert Victor Knox

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Article
2020

Effects of flush feeding strategy before breeding on reproductive performance of modern replacement gilts: impacts on ovulation rate and litter traits

Mallmann, A. L., Arend, L. S., Oliveira, G. S., Mellagi, A. P. G., Ulguim, R. R., Bernardi, M. L., Bortolozzo, F. P. & Knox, R. V., Jun 1 2020, In : Journal of animal science. 98, 6

Research output: Contribution to journalArticle

2019

Effects of feeding melatonin during proestrus and early gestation to gilts and parity 1 sows to minimize effects of seasonal infertility

Arend, L. S., Knox, R. V., Greiner, L. L., Graham, A. B. & Connor, J. F., Nov 4 2019, In : Journal of animal science. 97, 11, p. 4635-4646 12 p.

Research output: Contribution to journalArticle

Open Access
2018

Design and biological effects of a vaginally administered gel containing the GnRH agonist, triptorelin, for synchronizing ovulation in swine

Knox, R. V., Stewart, K. R., Flowers, W. L., Swanson, M. E., Webel, S. K. & Kraeling, R. R., May 2018, In : Theriogenology. 112, p. 44-52 9 p.

Research output: Contribution to journalArticle

Differential gene expression of Eph-ephrin A1 and LEPR-LEP with high or low number of embryos in pigs during implantation

Fu, Y., Knox, R. V., Li, L. & Ren, S., Aug 2018, In : Reproduction in Domestic Animals. 53, 4, p. 937-946 10 p.

Research output: Contribution to journalArticle

Ovulation and fertility responses for sows receiving once daily boar exposure after weaning and OvuGel® followed by a single fixed time post cervical artificial insemination

Ulguim, R. R., Bortolozzo, F. P., Wentz, I., Johnston, M., Webel, S. K., Arend, L. & Knox, R. V., Jan 1 2018, In : Theriogenology. 105, p. 27-33 7 p.

Research output: Contribution to journalArticle

2017

Effect of numbers of sperm and timing of a single, post-cervical insemination on the fertility of weaned sows treated with OvuGel®

Knox, R. V., Esparza-Harris, K. C., Johnston, M. E. & Webel, S. K., Apr 1 2017, In : Theriogenology. 92, p. 197-203 7 p.

Research output: Contribution to journalArticle

Effects of estrus synchronization using Matrix® followed by treatment with the GnRH agonist triptorelin to control ovulation in mature gilts

Knox, R. V., Webel, S. K., Swanson, M., Johnston, M. E. & Kraeling, R. R., Oct 2017, In : Animal reproduction science. 185, p. 66-74 9 p.

Research output: Contribution to journalArticle

2016

Artificial insemination in pigs today

Knox, R. V., Jan 1 2016, In : Theriogenology. 85, 1, p. 83-93 11 p.

Research output: Contribution to journalArticle

Effect of timing of relocation of replacement gilts from group pens to individual stalls before breeding on fertility and well-being

Knox, R. V., Shen, J., Greiner, L. L. & Connor, J. F., Dec 2016, In : Journal of animal science. 94, 12, p. 5114-5121 8 p.

Research output: Contribution to journalArticle

2015

Enhanced fertility prediction of cryopreserved boar spermatozoa using novel sperm function assessment

Daigneault, B. W., Mcnamara, K. A., Purdy, P. H., Krisher, R. L., Knox, R. V., Rodriguez-Zas, S. L. & Miller, D. J., May 1 2015, In : Andrology. 3, 3, p. 558-568 11 p.

Research output: Contribution to journalArticle

Genetic gain and economic values of selection strategies including semen traits in three- and four-way crossbreeding systems for swine production

González-Peña, D., Knox, R. V., Macneil, M. D. & Rodriguez-Zas, S. L., Mar 31 2015, In : Journal of animal science. 93, 3, p. 879-891 13 p.

Research output: Contribution to journalArticle

The effect of extender, method of thawing, and duration of storage on in vitro fertility measures of frozen-thawed boar sperm

Knox, R. V., Ringwelski, J. M., McNamara, K. A., Aardsma, M. & Bojko, M., Jan 1 2015, In : Theriogenology. 84, 3, p. 407-412 6 p.

Research output: Contribution to journalArticle

2014

Effect of day of mixing gestating sows on measures of reproductive performance and animal welfare

Knox, R., Salak-Johnson, J., Hopgood, M., Greiner, L. & Connor, J., Apr 2014, In : Journal of animal science. 92, 4, p. 1698-1707 10 p.

Research output: Contribution to journalArticle

Effects of altering the dose and timing of triptorelin when given as an intravaginal gel for advancing and synchronizing ovulation in weaned sows

Knox, R. V., Taibl, J. N., Breen, S. M., Swanson, M. E. & Webel, S. K., Aug 2014, In : Theriogenology. 82, 3, p. 379-386 8 p.

Research output: Contribution to journalArticle

Impact of pig insemination technique and semen preparation on profitability

Gonzalez-Peña, D., Knox, R. V., Pettigrew, J. & Rodriguez-Zas, S. L., Jan 2014, In : Journal of animal science. 92, 1, p. 72-84 13 p.

Research output: Contribution to journalArticle

Mortality, morbidity, and fertility after accidental electrical shock in a swine breeding and gestation barn

Knox, R. V., Shipley, C. F., Bressner, G. E. & Jarrell, V. L., Jan 1 2014, In : Journal of Swine Health and Production. 22, 6, p. 300-305 6 p.

Research output: Contribution to journalArticle

Novel and traditional traits of frozen-thawed porcine sperm related to in vitro fertilization success

Daigneault, B. W., McNamara, K. A., Purdy, P. H., Krisher, R. L., Knox, R. V. & Miller, D. J., Jul 15 2014, In : Theriogenology. 82, 2, p. 266-273 8 p.

Research output: Contribution to journalArticle

The effect of numbers of frozen-thawed boar sperm and addition of prostaglandin F2α at insemination on fertility in pigs

Knox, R. V. & Yantis, B. M., Jan 1 2014, In : Animal reproduction science. 151, 3-4, p. 194-200 7 p.

Research output: Contribution to journalArticle

2013

An analysis of survey data by size of the breeding herd for the reproductive management practices of North American sow farms

Knox, R. V., Rodriguez-Zas, S. L., Sloter, N. L., McNamara, K. A., Gall, T. J., Levis, D. G., Safranski, T. J. & Singleton, W. L., Jan 1 2013, In : Journal of animal science. 91, 1, p. 433-445 13 p.

Research output: Contribution to journalArticle

Effect of interval between inseminations when using frozen-thawed boar sperm on fertility and fetal paternity in mature gilts

Ringwelski, J. M., Beever, J. E. & Knox, R. V., Mar 1 2013, In : Animal reproduction science. 137, 3-4, p. 197-204 8 p.

Research output: Contribution to journalArticle

Effect of variability in lighting and temperature environments for mature gilts housed in gestation crates on measures of reproduction and animal well-being

Canaday, D. C., Salak-Johnson, J. L., Visconti, A. M., Wang, X., Bhalerao, K. & Knox, R. V., Mar 1 2013, In : Journal of animal science. 91, 3, p. 1225-1236 12 p.

Research output: Contribution to journalArticle

2012
2011

Synchronization of ovulation and fertility in weaned sows treated with intravaginal triptorelin is influenced by timing of administration and follicle size

Knox, R. V., Willenburg, K. L., Rodriguez-Zas, S. L., Greger, D. L., Hafs, H. D. & Swanson, M. E., Jan 15 2011, In : Theriogenology. 75, 2, p. 308-319 12 p.

Research output: Contribution to journalArticle

The current value of frozen-thawed boar semen for commercial companies

Knox, R. V., Sep 1 2011, In : Reproduction in Domestic Animals. 46, SUPPL. 2, p. 4-6 3 p.

Research output: Contribution to journalArticle

2010

Effect of number of motile, frozen-thawed boar sperm and number of fixed-time inseminations on fertility in estrous-synchronized gilts

Spencer, K. W., Purdy, P. H., Blackburn, H. D., Spiller, S. F., Stewart, T. S. & Knox, R. V., Sep 1 2010, In : Animal reproduction science. 121, 3-4, p. 259-266 8 p.

Research output: Contribution to journalArticle

2009

Assessment of follicle population changes in sows from day of weaning and during estrus using real-time ultrasound.

Knox, R., Taibl, J., Altmyer, M., Breen, S., Canaday, D. & Visconti, A., 2009, In : Society of Reproduction and Fertility supplement. 66, p. 199-200 2 p.

Research output: Contribution to journalArticle

2008

An update on North American boar stud practices

Knox, R. V., Levis, D., Safranski, T. & Singleton, W., Nov 1 2008, In : Theriogenology. 70, 8, p. 1202-1208 7 p.

Research output: Contribution to journalArticle

2006

Effect of altering dose of PG600 on reproductive performance responses in prepubertal gilts and weaned sows

Breen, S. M., Rodriguez-Zas, S. L. & Knox, R. V., Oct 1 2006, In : Animal reproduction science. 95, 3-4, p. 316-323 8 p.

Research output: Contribution to journalArticle

Effect of PG600 and adjusted mating times on reproductive performance in weaned sows

Breen, S. M., Rodriguez-Zas, S. L. & Knox, R. V., Jun 1 2006, In : Animal reproduction science. 93, 1-2, p. 157-164 8 p.

Research output: Contribution to journalArticle

Evaluation of methodology for administration of porcine FSH for use in estrus induction and for increasing ovulation rate in prepubertal gilts

Jackson, A. L., Breen, S. M., Rodriguez-Zas, S. L. & Knox, R. V., Sep 1 2006, In : Theriogenology. 66, 4, p. 1042-1047 6 p.

Research output: Contribution to journalArticle

Impact of biological and economic variables on optimal parity for replacement in swine breed-to-wean herds

Rodriguez-Zas, S. L., Davis, C. B., Ellinger, P. N., Schnitkey, G. D., Romine, N. M., Connor, J. F., Knox, R. V. & Southey, B. R., Sep 1 2006, In : Journal of animal science. 84, 9, p. 2555-2565 11 p.

Research output: Contribution to journalArticle

2005

Effect of age and physical or fence-line boar exposure on estrus and ovulation response in prepubertal gilts administered PG600

Breen, S. M., Farris, K. L., Rodriguez-Zas, S. L. & Knox, R. V., Feb 2005, In : Journal of animal science. 83, 2, p. 460-465 6 p.

Research output: Contribution to journalArticle

Recruitment and selection of ovarian follicles for determination of ovulation rate in the pig

Knox, R. V., Aug 1 2005, In : Domestic Animal Endocrinology. 29, 2, p. 385-397 13 p.

Research output: Contribution to journalArticle

2004

Effect of housing system and boar exposure on estrus expression in weaned sows

Knox, R. V., Breen, S. M., Willenburg, K. L., Roth, S., Miller, G. M., Ruggiero, K. M. & Rodriguez-Zas, S. L., Oct 1 2004, In : Journal of animal science. 82, 10, p. 3088-3093 6 p.

Research output: Contribution to journalArticle

2003

Bioeconomic evaluation of sow longevity and profitability

Rodriguez-Zas, S. L., Southey, B. R., Knox, R. V., Connor, J. F., Lowe, J. F. & Roskamp, B. J., Dec 1 2003, In : Journal of animal science. 81, 12, p. 2915-2922 8 p.

Research output: Contribution to journalArticle

Effect of boar exposure at time of insemination on factors influencing fertility in gilts

Willenburg, K. L., Miller, G. M., Rodriguez-Zas, S. L. & Knox, R. V., Jan 1 2003, In : Journal of animal science. 81, 1, p. 9-15 7 p.

Research output: Contribution to journalArticle

Plasma gonadotropins and ovarian hormones during the estrous cycle in high compared to low ovulation rate gilts

Knox, R. V., Vatzias, G., Naber, C. H. & Zimmerman, D. R., Jan 1 2003, In : Journal of animal science. 81, 1, p. 249-260 12 p.

Research output: Contribution to journalArticle

2002

Effect of frequency of boar exposure and adjusted mating times on measures of reproductive performance in weaned sows

Knox, R. V., Miller, G. M., Willenburg, K. L. & Rodriguez-Zas, S. L., Apr 2002, In : Journal of animal science. 80, 4, p. 892-899 8 p.

Research output: Contribution to journalArticle

2001

Administration of P.G. 600 to sows at weaning and the time of ovulation as determined by transrectal ultrasound

Knox, R. V., Rodriguez-Zas, S. L., Miller, G. M., Willenburg, K. L. & Robb, J. A., Apr 2001, In : Journal of animal science. 79, 4, p. 796-802 7 p.

Research output: Contribution to journalArticle

2000

Effect of subcutaneous vs intramuscular administration of P.G. 600 on estrual and ovulatory responses of prepubertal gilts

Knox, R. V., Tudor, K. W., Rodriguez-Zas, S. L. & Robb, J. A., Jul 2000, In : Journal of animal science. 78, 7, p. 1732-1737 6 p.

Research output: Contribution to journalArticle

1999

Influence of norgestomet in combination with gonadotropins on induction of estrus and ovulation in prepubertal gilts

Knox, R. V. & Tudor, K. W., Jun 1999, In : Journal of animal science. 77, 6, p. 1348-1352 5 p.

Research output: Contribution to journalArticle

Visualizing the reproductive tract of the female pig using real-time ultrasonography

Knox, R. V. & Althouse, G. C., Dec 1 1999, In : Journal of Swine Health and Production. 7, 5, p. 207-215 9 p.

Research output: Contribution to journalArticle

1994

Identification of relaxin gene expression and protein localization in the uterine endometrium during early pregnancy in the pig

Knox, R. V., Zhang, Z., Day, B. N. & Anthony, R. V., Dec 1994, In : Endocrinology. 135, 6, p. 2517-2525 9 p.

Research output: Contribution to journalArticle