• Área de Trabajo: 

Reproducción animal, enfasis Andrología (Theriogenology-Clinical Animal Andrology)

• Grado Académico e institución donde se obtuvo:

Lic. Médico Veterinario: Escuela de Medicina Veterinaria-UNA Heredia Costa Rica (Veterinary Medicine, School of Vet medicine, UNA-Costa Rica) (1990)

Master of Science en salud de hato y reproducción animal. Posgrado en Ciencias Veterinarias Tropicales. (MSc Herd health and animal reproduction. PCVET, UNA-COSTA RICA) (1997)

Doctorado Doctor en Philosophy (Ph.D). Departamento de Ginecología y Obstetricia, Universidad Sueca de Ciencias Agrícolas (SLU), Uppsala-Suecia (2000).

• Experiencia laboral:

Docente desde 1991 del Departamento de Reproducción EMV-UNA. Coordinador del Laboratorio de Andrología desde 1995 a la fecha.

• Publicaciones:

Revistas

-Induccion del Parto En Cerdas Con PGF2 a y Oxitocina Sintetica. Carmona, G., Quesada, L., Chacón, J. 1989: VI Congreso Nacional de Medicina Veterinaria, San José, 21-25 Agosto.

-Prevalence and risk factors for Tritrichomonas foetus infection in cattle in Northeastern CostaRica. Perez, E., Conrad, P., Hird, D., Ortuño, A., Chacón, J., Bondurant, R., Noordhuizen, J. 1992: Journal of Preventive Veterinary Medicine (14) 155-165.

-Tail stump sperm defect as a cause of sterility in an Indobrasil (Bos indicus) bull. J. Chacón and H. Rodríguez-Martínez. 1998: Reproduction in Domestic Animals (33) 405-407.

-Breeding soundness evaluation of extensively managed bulls in Costa Rica. Chacón, J., Pérez, E., Müller, E., Söderquist,    L., and Rodríguez-Martínez, H. 1999: Theriogenology (52)

221-231.

-Morphological features of the seminiferous and cauda epididymides epithelia of breeding Zebu bulls with normal and decreased testicular consistency. Jorge Chacón, Eduard Müller, and Heriberto Rodríguez-Martínez. 1999: Journal of Reproduction and Development (45) 119-128. 

-Scrotal circumference in grass-fed bulls extensively reared in Costa Rica. J. Chacón, D. Aranda, E. Pérez. 2000: Abstracts 14 th  International Congress on Animal Reproduction (1)

105.

-Assessment of sperm morphology in zebu bulls under field conditions in the tropics. J. Chacón. 2001: Reproduction in Domestic Animals 36 (2), 91-99.

-Seasonal variations in testicular consistency, scrotal circumference and spermiogramme parameters of extensively reared Brahman (Bos indicus) bulls in the tropics. J. Chacón, E. Pérez and H. Rodríguez-Martínez. 2002: Theriogenology (58), 41-50. 

-Prevalence and conception rate in extensively reared breeding zebu bulls with different levels of the sperm abnormality “tails coiled under the head”. J. Chacón. 2004: Abstracts 15 th  International Congress on Animal Reproduction. (1) 270. 

-Primary epididymal dysfunction in zebu bulls: Changes in sperm motility and morphologyaccording to ejaculation frequency. Chacón, J. 2008: Reproduction in Domestic Animals (43) Supplement 3, 162.

-Conception rate in extensively managed beef cattle herds bred by bulls with different andrological status in the south area of tropical Costa Rica. Navarro, L., Alpizar, E., Chacón J. 2008: Reproduction in Domestic Animals (43) Supplement 3, 166-167.

-Manejo reproductivo y diagnóstico andrológico del toro en ganaderías del trópico centroamericano. J. Chacón. 2009: Memorias XXI reunión bianual de la Asociación latinoamericana de producción animal (ALPA). Vol. 17, suplemento 1, 14-29.

-Clinical and pathological findings of a sac-like formation in the tunica vaginalis of a Nelore (Bos indicus) bull. J. Chacón and A. Berrocal. 2010: Reproduction in Domestic Animals 45 (2), 368-372.

-A proposal for categorization of scrotum length and its relationship with andrological classification in extensively managed bulls. J. Chacón, A. Jiménez and B. Vargas. 2010: Abstract 8th International Ruminant Reproduction. September 3-7, p.45.

-Ultrasonography of the scrotal contents in sound for breeding zebu bulls extensively reared in Costa Rica. J. Chacón, L. Navarro, B. Vargas and C. Víquez. 2012: Reproduction in Domestic Animals Vol. 47, Supplement 4: 519.

-Echographic assessment of scrotal contents in extensively reared bulls. J. Chacón, L. Navarro, B. Vargas and C. Víquez. 2012: Reproduction in Domestic Animals Vol. 47, Supplement 4: 520.

-Comparison of different methods for assessment of sperm morphology in bulls extensively reared. J. Chacón. 2014: 12 th International Symposium on Spermatology. 10-14 August. Newcastle-Australia.

-Correlations between body weight and scrotal circumference with age at puberty in zebu steers raised under tropical conditions. J. Chacón, A. Arias, K. Barrantes and B. Vargas. 2014. 9 th Biennial Conference of the Association for Applied Animal Andrology. 8-9 August. Newcastle-Australia.

-Deferred bulls: Are cycles per conception and pregnancy rate determined by the type of spermiogramme deviation under natural mating? L. Navarro and J. Chacón. 2016: Animal Reproduction Science Vol. 169, Special issue on the 10 the  biennial conference of the Association for Applied Animal Andrology: 127-128.

-Thermographic scrotal pattern in sound for breeding zebu bulls extensively managed in tropical Costa Rica. J. Chacón, B. Vargas and A. Chacón-Obando. Animal Reproduction Science Vol. 169, Special issue on the 10 th  biennial conference of the Association for Applied Animal Andrology: 128.

-Ionic concentration in the fluid collected from testis and epididymis in zebu bulls. J. Chacón, B. Vargas, R. Alfaro, L. Navarro, K. Barrantes and A. Jiménez. Abstracts 18 th  International Congress on Animal Reproduction. Tours-France. 26-30 June 2016: 332-333.

-Cycles per conception achieved by extensively managed beef bulls with different andrological status under natural mating in tropical Costa Rica. L. Navarro and J. Chacón. Abstracts 18 th  International Congress on Animal Reproduction. Tours-France. 26-30 June 2016: 104.

-Breeding Soundness Evaluation (BSE) in boars from Costa Rica. G. Castillo and J. Chacón. Abstracts 11 th  Biennial Conference of the Association for Applied Animal Andrology. New Orleans-USA. 14-16 Julio 2018. Animal Reproduction Science 194 (2018) e10. https://doi.org/10.1006/j.anireprosci.2018.04.026

-Testicular dimensions in boars. J. Chacón, G. Castillo and B. Vargas. Abstracts 11 th  Biennial Conference of the Association for Applied Animal Andrology. New Orleans-USA. 14-16 Julio 2018. Animal Reproduction Science 194 (2018) e11. https://doi.org/10.1006/j.anireprosci.2018.04.027

-Heritability and genetic correlations for scrotal circumference at different ages in Brahman bulls raised under tropical conditions. J Chacón, C. Víquez and B. Vargas. Animal Reproduction 15 (2018), suppl 1, p 1163.

Libros

-Applied Andrology in Cattle (Bos indicus). En: Animal Andrology, Theories and Applications. Editado por Peter J. Chenoweth y Steven Lorton. CABI International, 2014. Capítulo XIII ISBN-13: 978 1 78064 316 8