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Determinação da idade à puberdade em borregas da raça Churra Galega Bragançana nascidas no Inverno

Authors: Correia, Teresa Montenegro; Valentim, Ramiro; Azevedo, Jorge; Maurício, Raimundo; Mendonça, Álvaro; Lobo, Vera;

Determinação da idade à puberdade em borregas da raça Churra Galega Bragançana nascidas no Inverno

Abstract

Este trabalho teve como principal objectivo estudar a idade à puberdade de um grupo de borregas da raça Churra Galega Bragançana, nascidas no início do Inverno e sujeitas às condições de maneio da Escola Superior Agrária de Bragança (ESAB). Neste sentido, na cidade de Bragança (latitude 41° 49' N, longitude 6° 40' W e altitude 720 metros), mais precisamente na Quinta de Santa Apolónia, pertencente à ESAB, 15 borregas da raça Churra Galega Bragançana, com uma idade inicial de cinco meses, foram seleccionadas para a realização deste estudo. As borregas da raça Churra Galega Bragançana produziram a primeira subida das concentrações plasmáticas de progesterona (P>0,5 ng/ml) com uma idade aproximada de 6,3 meses e com um peso corporal médio de 33,8 kg, ou seja, com cerca de 70,5% do seu peso adulto. Os primeiros sinais detectáveis de cio, surgiram quando estas tinham uma idade próxima dos 7,7 meses, um peso corporal médio de 34,0 kg e uma percentagem média de peso adulto de 70,8%. Em todas as borregas estudadas, a primeira ovulação foi “silenciosa” e a duração da primeira fase lútea foi curta.

Country
Portugal
Related Organizations
Keywords

Raça Churra Galega Bragançana, Puberdade

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green