Role of Male effect on Reproductive Efficiency of Nulliparous Santa Inês and Morada Nova ewes raised in Different Regions

Fernando Tenório Filho, José Carlos Ferreira-Silva, Pábola Santos Nascimento, Leopoldo Mayer de Freitas Neto, Marcelo Tigre Moura, José Monteiro Almeida Irmão, Marcos Antonio Lemos Oliveira

Abstract


Background: The male effect is an attractive strategy to increase herd production by concentrating mating events and deliveries and further allowing the adoption of genetic improvement programs. It holds similar efficiency to those chemically based estrous synchronization methods, but has the advantage of being a natural method. The work was aimed to evaluate the influence of male effect on estrous induction and synchronization, pregnancy and prolificacy of nulliparous Santa Inês and Morada Nova ewes raised in Semiarid and Zona da Mata regions of Pernambuco state.

Materials, Methods & Results: Santa Inês (n = 80) and Morada Nova (n = 80) females, with age from 11 to 12 months, after being evaluated and selected, were identified with plastic ear tags, weighted and maintained isolated from males, during 30 days before experiment onset, without any physical, visual, olfactive and auditive contact. Estrous events were observed twice a day (6:00 and 16:00 h) by trained personnel, during a breeding season of 60 days, and estrous were considered synchronized when detected, within first five days of breeding season. Rams of Santa Inês (n = 2) and Morada Nova (n = 2) breeds were selected based upon reproductive capacity by an andrology exam, and were marked on the externum bone region with a wax and ink (4:1) mixture, and were marked in female lots in order to identify females in estrous. After ten days of breeding season onset, rams were again marked with the same wax and ink mixture, but with a different ink color. Pregnancy diagnosis was performed on day 30 by ultrasonography and confirmed on day 60 after the last mating. The statistical analysis was performed using SAS, version 8. Differences of 5% (P < 0.05) or lower were considered significant. The results show that estrous synchronization in the semiarid region in both breeds was detected in 10% of females. The total pregnancy on first service was 45.00% and on second was 52.94%, with 85.18% of singleton and 14.81% twin deliveries, with prolificacy de 1.15 ± 0.38. In the Zona da Mata region 10% Santa Inês and 15% Morada Nova females had synchronized estrous (P > 0.05). The total pregnancy was 42.50% on first, 64.70% on second service and total delivery was 86.20% singletons, 12.06% twins and 3.33% triples with prolificacy of 1.15 ± 0.31. On both Semiarid and Zona da Mata regions, the majority of estrous events occurred between the11th and 15th day of the breeding season for Santa Inês ewes and between 6th and 10th day for Morada Nova ewes.

Discussion: The occurrence of estrous, for both breeds, in both regions, were detected throughout the breeding seasons, despite most estrous detections were within the initial fifteen days, which normally happens with cycling pluriparous females, in disagreement with findings in the literature that young females display lower reproductive performance on the first breeding season. However, the sexual inexperience of young females is not equivalent to lack of male receptivity, since then, could not be responsible for late estrous onset in a breeding season of young females. In agreement with this statement, and based on the data described here, it has been described that young ewes display estrous within the initial 18 days of breeding season onset. The estrous dispersion in biostimulation programs is normally due to female cyclicity, a physiological condition that lowers the sensibility to estradiol negative feedback response, but are still responsible to the presence of males.


Keywords


biostimutation; pregnancy; prolificacy.

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References


Almeida-Irmão J.M., Freitas Neto L.M., Moura M.T., Neves J.P., Lima P.F. & Oliveira M.A.L. 2014. Duration of the breeding season on the reproductive performance of Anglo-Nubian goats during dry and rainy periods. Veterinary Science Development. 4(1): 43-45.

Alves C.G.T., Almeida-Irmão J.M., Moura M.T., Silva J.C.F., Deus P.R., Neves J.P., Bartolomeu C.C., Lima P.F. & Oliveira M.A.L. 2014. Influence of male-to-female ratio and climatic conditions on the reproductive performance of anglo nubian goats. Boletim da Indústria Animal. 71(3): 284-290.

Alves C.G.T., Silva J.C.F., Almeida-Irmão J.M., Moura M.T., Bartolomeu C.C., Lima P.F. & Oliveira M.A.L. 2015. Reproductive outcomes using different distances for preconditioning for male effect in goats during two distinguish climate seasons. Boletim de Indústria Animal. 72(1): 69-76.

Bandeira D.A., Santos M.H.B., Correia Neto J. & Nunes J.F. 2004. Aspectos gerais da caprino-ovinocultura no Brasil e seus reflexos produtivo e reprodutivo. In: Santos M.H.B., Oliveira M.A.L. & Lima P.F. (Eds). Diagnóstico de gestação na cabra e na ovelha. São Paulo: Varela, pp.1-8.

Caldas E.L.C., Freitas Neto L.M., Almeida-Irmão J.M., Silva J.C.F., Silva P.G.C., Veloso Neto H., Neves J.P., Moura M.T., Lima P.F. & Oliveira M.A.L. 2015. The influence of separation distance during the preconditioning period of the male effect approach on reproductive performance in sheep. Veterinary Science Development. 5(1): 17-20.

Colégio Brasileiro de Reprodução Animal (CBRA). 1998. Manual para exame e avaliação de sêmen animal. 2.ed. Belo Horizonte: CBRA, 50p.

Dýrmundsson Ó.R. 1973. Puberty and early reproductive performance in sheep. II. Ram lambs. Animal Breeding Abstracts. 41(9): 419-430.

Dýrmundsson Ó.R. 1978. Studies on the breeding season of Icelandic ewes and ewe lambs. Journal of Agricultural Science. 90(2): 275-281.

Evans A.C.O., Flynn J.D., Quinn K.M., Duffy P., Quinn P., Madgwick S., Crosby T.F., Boland M.P. & Beard A.P. 2001. Ovulation of aged follicles does not affect embryo quality or fertility after a 14-day progestogen estrous synchronization protocol in ewes. Theriogenology. 56(5): 923-936.

Evans A.C.O., Duffy P., Crosby T.F., Hawken P.A.R., Boland M.P. & Beard A.P. 2004. Effect of ram exposure at the end of progestagen treatment on estrus synchronization and fertility during the breeding season in ewes. Animal Reproduction Science. 84(3-4): 349-358.

Falcão D.P., Santos M.H.B., Freitas Neto L.M., Neves J.P., Lima P.F. & Oliveira M.A.L. 2008. Uso da PGF2α no puerpério para reduzir o anestro pós-parto de cabras em aleitamento contínuo e controlado. Ciência Animal Brasileira. 9(2): 512-518.

Fonseca J.F., Souza J.M.G. & Bruschi J.H. 2007. Sincronização de estro e superovulação em ovinos e caprinos. In: Simpósio de Caprinos e Ovinos da Ev-UFMG. (Belo Horizonte, Brasil). pp.167-194.

Gelez H. & Fabre-Nys C. 2004. The “male effect” in sheep and goats: a review of the respective roles of the two olfactory systems. Hormones and behavior. 46(3): 257-271.

Gelez H., Lindsay D.R., Blache D., Martin G.B. & Fabre-Nys C. 2003. Temperament and sexual experience affect female sexual behaviour in sheep. Applied Animal Behaviour Science. 84(1): 81-87.

González-Stagnaro C. 1991. Control y manejo de los factores que afectam al comportamiento reproductivo de los pequenõs rumiantes en el mediotropical. In: Internetional Symposium on nuclear and Related Techiques in Animal production and Health. (Viena, Áustria). pp.405-421.

Instituto Brasileiro de Geografia e Estatística (IBGE). 2011. Produção da Pecuária Municipal. Censo Demográfico: Dados Distritais. Rio de Janeiro, v.37. IBGE. 1-55p.

Lima-Verde J.B., Lopes Junior E.S., Teixeira D.I.A., Paula N.R.O., Medeiros A.A., Rondina D. & Freitas, V.J.F. 2003. Transcervical embryo recovery in Saanen goats. South African Society for Animal Science. 33(2): 127-131.

Lima S.A. 2006. O efeito macho sobre a manifestação de estro em ovelhas Merino e Santa Inês. 132f. Recife, PE. Tese (Doutorado em Ciência Veterinária) - Programa de Pós graduação em Ciência Veterinária, Universidade Federal Rural de Pernambuco.

Lassoued N., Khaldi G., Chimeneau P., Conié Y. & Thimonier J. 1997. Role of uterus in early regression of corpora lutea induced by ram effect in seasonally anoiestrous barbarine ewes. Reprodution Nutrition and Development. 37(5): 559-571.

Lassoued N., Khaldi G., Cognié Y., Chemineau P. & Thimonier J. 1995. Effet de la progesterone sur le taux d’ovulation et la durée du cycle ovarien induits par effet male chez la brebis Barbarine et la chèvre locale tunisienne. Reprodution Nutrition and Development. 35(4): 415-426.

Luna-Orozco J.R., Fernández I.G., Gelez H. & Delgadillo J.A. 2008. Parity of female goats does not influence their estrus and ovulatory response to the male effect. Animal Reproduction Science. 106(3-4): 352-360.

Machado I.B.B., Fernandes A.A.O. & Selaive-Villarroel A.B. 1999. Parâmetros reprodutivos de ovinos deslanados Morada Nova e Santa Inês mantidos em pastagem cultivada no estado do Ceará. Revista Científica de Produção Animal. 1(2): 81-87.

Moraes J.C.F., Souza C.J.H., Gonçalves P.B.D., Freitas F.J.V. & Lopes Júnior E.S. 2008. Controle do estro e da ovulação em ruminantes. In: Gonçalves P.B.D., Figueiredo J.R. & Freitas V.J.F. (Eds). Biotécnicas aplicadas à reprodução animal. 2.ed. São Paulo: Rocca, pp.33-55.

Mies Fillho A. 1988. Tecnologia do sêmen e inseminação artificial na espécie ovina. In: Congresso Brasileiro de Reprodução Animal. (Belo Horizonte). pp.1-16.

Neves J.P., Irala P.N.D., Gonzalez C.I.M. & Dornelles W.M. 1982. Utilização do diluente Tris na inseminação artificial em ovinos. Revista Centro de Ciências Rurais. 12(2-3): 181-187.

Oliveira M.A.L., Guido S.I. & Lima P.F. 2001. Comparison of different protocols used to induce and synchronize estrus cycle of Saanen Goats. Small Ruminant Research. 40(3): 149-153.

Prasad S.P., Roy A. & Pandey M.D. 1971. Influence of age body weight, and season on the reproductive performance of Barbari goats. Agra University Journal Of Research Science. 20(1): 31-39.

Robinson J.J., Ashworth C.J., Rooke J.A., Mitchell L.M. & Mcevoy T.G. 2006. Nutrition and fertility in ruminant livestock. Animal Feed Science and Technology. 126(3-4): 259-276.

Rodrigues A., Figueiredo E.A.P. & Bandeira D.A. 1992. Características de prolificidade, taxa de parição e período de gestação de cabras Pardo-alemã, Anglo- Nubiana e Sem raça definida (SRD). João Pessoa: EMEBA-PB. pp.18.

Rosa H.J.D. & Bryant M.J. 2002. The “ram effect” as a way of modifying the reproductive activity in the ewes. Small Ruminant Research. 45(1): 1-16.

Salles M.G.F. & Araújo A.A. 2006. Indução do estro em cabras leiteiras pelo efeito macho. In: XI Semana Universitária. UECE. (Fortaleza).

Santos M.H.B., Lima P.F. & Oliveira M.A.L. 2004. Diagnóstico de gestação na cabra e na ovelha. São Paulo: Varela, pp.97-116.

Silva F.L.R., Araújo A.M. & Figueiredo E.A. 1998. Características de crescimento e de reprodução em ovinos Somalis no Nordeste brasileiro. Revista Brasileira de Zootecnia. 27 (6): 1107-1114.

Simplício A.A., Riera G.S. & Figueiredo E.A.P. 1982. Desempenho produtivo de ovelhas da raça Somalis Brasileira no Nordeste do Brasil. Pesquisa Agropecuária Brasileira. 17(12): 1795-1803.




DOI: https://doi.org/10.22456/1679-9216.80929

Copyright (c) 2018 Fernando Tenório Filho, José Carlos Ferreira-Silva, Pábola Santos Nascimento, Leopoldo Mayer de Freitas Neto, Marcelo Tigre Moura, José Monteiro Almeida Irmão, Marcos Antonio Lemos Oliveira

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