Reproductive Seasonality of Corriedale Rams under Extensive Rearing Conditions

Pérez, Raúl López; López, Almudena López; Castrillejo, A.; Bielli, Alejandro; Laborde, D.; Gastel, T; Tagle, Rodrigo; Queirolo, Dante; Franco, Jorge Quintal; Forsberg, M.; Rodríguez‐Martínez, H.

doi:10.1186/bf03548513

Cited by 34 publications

(1 citation statement)

References 19 publications

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“…The food supply and source of nutrients can be highly variable in terms of the quality and quantity due to seasonal variations, and these animals are exposed to a great variety of climatic conditions and the presence of predators. All of these factors can impact the reproductive performance of the male and the pregnancy rate of the flock [ 74 ]. Therefore, it is recommended to frequently monitor the body condition score of the males during the breeding season, assess the hoof health and limb integrity and treat animals promptly when needed.…”

Section: Ram and Ram Lamb Nutritionmentioning

confidence: 99%

Reproductive Management of Rams and Ram Lambs during the Pre-Breeding Season in US Sheep Farms

Maquivar

Smith

Busboom

2021

Animals

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In sheep farms, achieving economic and productive efficiency and sustainability goals is directly related with the reproductive management of the animals. Genetically, the male contribution to the offspring is 50%, but in practical terms, there is a greater potential impact of the ram on reproductive results, because one male has the potential to affect a large group of females and therefore greatly affects the entire flock. Unfortunately, the selection of males for breeding in the US sheep industry has been traditionally conducted based on phenotypical traits, without a genetic/reproductive evaluation, and/or health assessment or records. Therefore, it is important to establish integrative management practices to select the rams and ram lambs to be used in the breeding season. Among these practices are genomic testing, a comprehensive breeding soundness evaluation and assessment of health status and records of the males before the breeding season, to detect and correct potential issues.

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Section: Ram and Ram Lamb Nutritionmentioning

confidence: 99%

Reproductive Management of Rams and Ram Lambs during the Pre-Breeding Season in US Sheep Farms

Maquivar

Smith

Busboom

2021

Animals

View full text Add to dashboard Cite

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Significance of Body Condition Scoring System to Optimize Sheep Production

Maurya

Sejian

Singh

et al. 2017

Sheep Production Adapting to Climate Change

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Semen variables and sperm membrane protein profile of Saanen bucks (Capra hircus) in dry and rainy seasons of the northeastern Brazil (3°S)

et al. 2014

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The Saanen is a highly productive breed, and for this reason, it has been raised in Brazil, but mostly under climate conditions completely different from where the breed originated. The objective of this study was to investigate variations in semen parameters and sperm membrane proteins from Saanen bucks (n = 7) raised in Northeastern Brazil, during dry season (September, October, and November) and rainy season (March, April, and May). We showed that during the dry season, sperm motility, concentration, and the percentage of normal sperm decreased as compared to the rainy season. Rectal temperatures of bucks had no significant (p > 0.05) variations during the dry and rainy seasons. However, temperatures of left and right skin testis were higher (p < 0.05) during the dry as compared to the rainy season. Expression of three proteins (lysine-specific demethylase 5D, adenosine triphosphate (ATP) synthase subunit d, and radial spoke head protein 9 homolog) in sperm membrane were more intense in rainy season and only one protein (cytosol aminopeptidase) had greater expression in the dry season of the year. Our results show that mechanisms of testicular thermoregulation of Saanen bucks did not prevent a decrease in seminal parameters during the dry season. This deterioration may be related to reduced expression of proteins associated with important functions in sperm membrane.

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Reproductive Seasonality of Corriedale Rams under Extensive Rearing Conditions

Cited by 34 publications

References 19 publications

Reproductive Management of Rams and Ram Lambs during the Pre-Breeding Season in US Sheep Farms

Reproductive Management of Rams and Ram Lambs during the Pre-Breeding Season in US Sheep Farms

Significance of Body Condition Scoring System to Optimize Sheep Production

Semen variables and sperm membrane protein profile of Saanen bucks (Capra hircus) in dry and rainy seasons of the northeastern Brazil (3°S)

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