Caracterización reproductiva del caprino Criollo­Neuquino

LANARI MR; FERNANDEZ J; CUETO MARCELA; BRUNO GALARRAGA, MARÍA MACARENA;; SILVESTRE P; GIBBONS A,

ARCHIVOS LATINOAMERICANOS DE PRODUCCIóN ANIMAL

ALPA

Lugar: Venezuela; Año: 2021 vol. 29 p. 199 - 214

1022-1301

Abstract: The Criollo­Neuquina goat breed inhabits the province of Neuquén (Argentina) and constitutes the wayof life of 1 600 breeders from northern Neuquén, due to its high reproductive efficiency and productive potential. Inthis work, the reproductive characterization of this breed is presented, addressing the study of seasonal variation ofthe reproductive activity in adult females and males, the initiation of sexual activity in female and male kids, themale effect, and pre­ovulatory follicular dynamics. These investigations constitute one of the most exhaustivereproductive characterizations of a caprine breed. The reproductive cycle is markedly seasonal, with mating inautumn and kidding in spring. Females present a period of fertile estrus of 5 months, between April and August;with higher ovulation rates at the beginning of the season than at the end (1.7 vs 1.0 ovulations / goat). The sexualactivity of the males is seasonal, presenting the highest activity between March and June. Males and females areprecocious in their development, being fertile from their first autumn of life, as long as they reach an adequate bodydevelopment. The work confirms the response to the male effect, with an estrus concentration higher than 80 %between 8 to 11 days after introduction of the males. The pre­ovulatory follicular dynamics presents some of thereproductive strategies described in prolific sheep breeds. Advances in the knowledge of the reproductivephysiology of a breed in a certain region constitute studies of reference to establish different management strategiesand improve its productive efficiency. This knowledge allows implementing a rational use of reproductivetechniques to be used in conservation, dissemination or genetic improvement programs.