Hastening Time to Ejaculation in Donkey Jacks Treated with the PGF2α Analog, Cloprostenol Sodium
Panzani, Duccio (University of Pisa. Department of Veterinary Clinical Sciences)
Quaresma, Miguel (University of Trás-os-Montes e Alto Douro. Center of Animal and Veterinary Science)
Fanelli, Diana (University of Pisa. Department of Veterinary Clinical Sciences)
Camillo, Francesco (University of Pisa. Department of Veterinary Clinical Sciences)
Moroni, Rebecca (University of Pisa. Department of Veterinary Clinical Sciences)
Rota, Alessandra (University of Pisa. Department of Veterinary Clinical Sciences)
Martins-Bessa, Ana (University of Trás-os-Montes e Alto Douro. Center of Animal and Veterinary Science)
Nóvoa, Miguel (Association for the Study and Protection of Donkeys)
Catalán, Jaime (Universitat Autònoma de Barcelona. Departament de Medicina i Cirurgia Animals)
Canisso, Igor F. (University of Illinois. Department of Veterinary Clinical Medicine)
Conte, Giuseppe (University of Pisa. Department of Agriculture, Food and Environment)
Miró, Jordi (Universitat Autònoma de Barcelona. Departament de Medicina i Cirurgia Animals)

Date:	2020
Abstract:	Semen collection in donkey jacks can last up to 90 min due to the long courtship needed for this species' males to obtain sexual excitation and erection. In several domestic animals, ProstaglandinF2α successfully stimulated excitement in the male prior to collection and enhanced semen production. In our study, the prostaglandin analog cloprostenol sodium, administered prior to the semen collection, hastened erection and ejaculation in almost all donkey jacks. No differences have been found in semen production compared to control. Due to the long courtship needed to attain excitation and erection, donkey semen collection can take up to 90 min. ProstaglandinF2α (PGF2α) has been reported to hasten the onset of erection and ejaculation in domesticated mammals, presumably by inducing smooth muscle contractions in the internal genitalia. However, while it has been anecdotally used in donkeys, it has yet to be critically evaluated. This study aimed to compare behavioral and semen parameters in Catalan, Balearic, Amiata, and Miranda jacks treated with the PGF2α analogue cloprostenol sodium immediately prior to exposure to an estrus jenny. Nineteen donkeys were assigned in a crossover design to receive cloprostenol sodium (125 µg, i. m. ; n = 53 collections) or saline (1 mL, i. m. ; n = 53 collections). There were no differences for erection (52/53 vs. 52/53) or ejaculation (52/53 vs. 48/53) for collection attempts assigned to saline or cloprostenol sodium, respectively. Cloprostenol sodium significantly hastened treatment-to-erection and treatment-to-ejaculation times from 12. 0 ± 1. 6 to 6. 0 ± 1. 6 min and from 14. 0 ± 1. 4 to 9. 6 ± 1. 4 min, respectively. Significant effects of breed and age were observed in behavioral and parameters, but there were no effects of cloprostenol sodium administration on semen parameters. In conclusion, cloprostenol sodium administration immediately prior to semen collection hastened time to collect semen in donkeys with no detrimental effects on semen quality and can be used by practitioners to circumvent long delays in donkey semen collection.
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Donkey ; Semen collection ; Cloprostenol sodium ; Erection ; Ejaculation
Published in:	Animals, Vol. 10 (november 2020) , ISSN 2076-2615

DOI: 10.3390/ani10122231
PMID: 33261078

11 p, 2.2 MB

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