Reproductive seasonality in Saanen goats kept under tropical conditions

This study aimed to verify the reproductive seasonality in Saanen goats from distinct parity orders (nulliparous, primiparous, and pluriparous) throughout an entire year in the Southeast Region of Brazil. In addition, it was also verified the influence of environmental indexes, metabolic profile, bo...

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Veröffentlicht in:Tropical animal health and production 2019-02, Vol.51 (2), p.345-353
Hauptverfasser: Balaro, Mario Felipe A., de Mello, Samuel Guaraná Valverde, da Silva Santos, Alex, Cavalcanti, Luiza Mattos, Almosny, Nádia Regina Pereira, Fonseca, Jeferson F., Brandão, Felipe Z.
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container_end_page 353
container_issue 2
container_start_page 345
container_title Tropical animal health and production
container_volume 51
creator Balaro, Mario Felipe A.
de Mello, Samuel Guaraná Valverde
da Silva Santos, Alex
Cavalcanti, Luiza Mattos
Almosny, Nádia Regina Pereira
Fonseca, Jeferson F.
Brandão, Felipe Z.
description This study aimed to verify the reproductive seasonality in Saanen goats from distinct parity orders (nulliparous, primiparous, and pluriparous) throughout an entire year in the Southeast Region of Brazil. In addition, it was also verified the influence of environmental indexes, metabolic profile, body weight, and social interactions on the reproductive seasonality of these animals. Forty Saanen goats kept under intensive system at latitude 22° 52′ 30″ s and tropical photoperiod (11–13 h of light per day) were used. Every 15 days, blood from 24 animals (8 animals per group) was collected for assessment of serum progesterone levels. Monthly, environmental data (rainfall index, maximum and minimum temperature, and time of natural daylight) and blood were collected to evaluate the metabolic profile. Weighting and body condition score measurement were also carried out every 2 months. There was no difference in body weight and body condition score in primiparous and pluriparous goats. Nulliparous goats showed natural breeding season in the winter season while the primiparous and pluriparous goats remained cyclical in autumn and winter season. Regardless of the parity order, all goats showed a seasonal anestrus in the spring season. From December, social interactions were able to reestablish, in distinct degrees, the cyclical state in the goats. Likewise, environmental and weight indexes had low and moderate influence, respectively, on the reproductive seasonality in the Saanen goats kept under tropical conditions.
doi_str_mv 10.1007/s11250-018-1696-2
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In addition, it was also verified the influence of environmental indexes, metabolic profile, body weight, and social interactions on the reproductive seasonality of these animals. Forty Saanen goats kept under intensive system at latitude 22° 52′ 30″ s and tropical photoperiod (11–13 h of light per day) were used. Every 15 days, blood from 24 animals (8 animals per group) was collected for assessment of serum progesterone levels. Monthly, environmental data (rainfall index, maximum and minimum temperature, and time of natural daylight) and blood were collected to evaluate the metabolic profile. Weighting and body condition score measurement were also carried out every 2 months. There was no difference in body weight and body condition score in primiparous and pluriparous goats. Nulliparous goats showed natural breeding season in the winter season while the primiparous and pluriparous goats remained cyclical in autumn and winter season. Regardless of the parity order, all goats showed a seasonal anestrus in the spring season. From December, social interactions were able to reestablish, in distinct degrees, the cyclical state in the goats. 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In addition, it was also verified the influence of environmental indexes, metabolic profile, body weight, and social interactions on the reproductive seasonality of these animals. Forty Saanen goats kept under intensive system at latitude 22° 52′ 30″ s and tropical photoperiod (11–13 h of light per day) were used. Every 15 days, blood from 24 animals (8 animals per group) was collected for assessment of serum progesterone levels. Monthly, environmental data (rainfall index, maximum and minimum temperature, and time of natural daylight) and blood were collected to evaluate the metabolic profile. Weighting and body condition score measurement were also carried out every 2 months. There was no difference in body weight and body condition score in primiparous and pluriparous goats. Nulliparous goats showed natural breeding season in the winter season while the primiparous and pluriparous goats remained cyclical in autumn and winter season. 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subjects Anestrus
Animals
Biomedical and Life Sciences
Blood
Body weight
Breeding
Breeding seasons
Caprinae
Goats
Life Sciences
Metabolism
Parity
Progesterone
Rainfall
Rainfall index
Regular Articles
Seasonal variations
Seasons
Social behavior
Social factors
Social interactions
Spring (season)
Veterinary Medicine/Veterinary Science
Winter
Zoology
title Reproductive seasonality in Saanen goats kept under tropical conditions
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