Santiago T. Peña, Jr., DVM, PhD, DPCSP

Dr. Santiago T. Peña, Jr. graduated Doctor of Veterinary Medicine, Cum Laude at the College of Veterinary Medicine, Visayas State University. He completed his Master’s and Doctoral degrees (Tropical Veterinary Science) as an AusAID scholar (ADS/AAS) from James Cook University, Townsville, Queensland, Australia, under the late Prof. Phillip Summers, and Dr. Damien Paris (JCU, AU), Dr. Bruce Gummow (JCU, AU) and Dr. Anthony Parker (OSU, USA), respectively.

Dr. Peña specializes on sperm biology with special focus on semen evaluation (CASA), processing, and freezing (LN2). His work on the impact of heat stress on sperm DNA integrity induced by tropical summer, and mitigation using a custom formulated antioxidant supplement (PLoS ONE 14: e0216143) are well cited. His research interests have also expanded on the epidemiological investigations against antibiotic residues, and on-farm biosecurity and herd health management.

He handles the subjects on Reproductive Physiology, Theriogenology, Swine Production and Herd Health Management, and Animal Nutrition and Feeding Management. While serving as an Associate Editor of the Annals of Tropical Research and Science and Humanities journals, Dr. Peña also chairs the Institutional Animal Care and Use Committee (IACUC) of the University.

Current Projects:

  • Optimizing Boar Sperm Cryopreservation Towards Effective Industry Utilization and Genetic Conservation (DOST-PCAARRD)
  • Semen Quality Evaluation of the Philippine Native Boar (DOST-PCAARRD)
  • Prevalence and Nature of Antibiotic Residues in Pork and Poultry Meats Collected from Public Wet Markets and Private Meatshops in Leyte (PCHRD-EVHRDC)
  • VET Mends: CVM Integrated Veterinary Outreach (Extension- VSU)

Publications:

Peña, S.T., Stone, F., Gummow, B., Parker, A.J. and Paris, D.B., 2021. Susceptibility of boar spermatozoa to heat stress using in vivo and in vitro experimental models. Tropical Animal Health and Production, 53, 97. | View
Bernardes, D.T.C. and Peña Jr, S.T., 2020. Biosecurity and readiness of smallholder pig farmers against potential African Swine Fever outbreak and other pig diseases in Baybay City, Leyte, Philippines. Scientia Agropecuaria, 11 (4), pp. 611-620. | View
Peña, S.T., Bolambot, SMG., Lañada, E.B. 2020. “Prevalence of dermatophye infection in pigs among small-holder farmers in Baybay City, Leyte, Philippines and associated risk factors. Exploratory Animal and Medical Research. 10 (2). | View
Layola, M.D.A., De Asis, G.R. and Peña Jr, S.T., 2020. Physicochemical characteristics of milk and teat yield of different goat breeds under normal tropical rearing conditions. Jurnal Veteriner 21 (1), pp. 53-62. | View
Macapanas, R. G and Peña Jr, S.T., 2020. Prevalence and morphometric evaluation of cystic ovaries in pigs slaughtered in Tacloban City abattoir, Philippines. International Journal of Veterinary Science, 10(1), pp. 59-63. | View
Peña, S.T.Jr., Stone, F., Gummow, B., Parker, A.J. and Paris, D.B., 2019. Tropical summer induces DNA fragmentation in boar spermatozoa: implications for evaluating seasonal infertility. Reproduction, Fertility and Development, 31(3), pp.590-601. | View
Peña Jr, S.T., Gummow, B., Parker, A.J. and Paris, D.B., 2019. Antioxidant supplementation mitigates DNA damage in boar (Sus scrofa domesticus) spermatozoa induced by tropical summer. PloS ONE, 14(4), p.e0216143.| View
Peña, S.T.Jr. and Lañada, E. B., 2019. Predictors of success or failure in artificially inseminated buffalo cows in Baybay City, Leyte, Philippines: An unmatched case-control study. Buffalo Bulletin 38 (1): 119-126, | View
Andico Jr, W.V. and Peña Jr, S.T., 2019. Biosecurity practices in high throughput Philippine backyard pig herds: a multiple correspondence analysis. International Journal of Veterinary Science, 8(4): 316-323. | View
Tanduyan, C.J.M. and Peña Jr, S.T., 2018. Combined vitamins, minerals and amino acid supplement improves eggshell quality but not egg weight in Japanese quails (Coturnix coturnix japonica). Malaysian Journal of Animal Science, 21(2): 39-48. | View
Peña Jr., S.T., Gummow, B., Parker, A.J. and Paris, D.B., 2017. Revisiting summer infertility in the pig: could heat stress-induced sperm DNA damage negatively affect early embryo development?. Animal Production Science, 57(10), pp.1975-1983.| View
Peña Jr, S. T., Summers, P., Gummow, B. and Paris, D.B., 2015. Oviduct binding ability of porcine spermatozoa develops in the epididymis and can be advanced by incubation with caudal fluid. Theriogenology, 83(9): 1502-1513. | View
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