2017
DOI: 10.1590/1678-4162-9233
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Comb, cloaca and feet scores and testis morphometry in male broiler breeders at two different ages

Abstract: In broiler breeder roosters, the weight of the testes is positively associated with daily sperm production and fertility. In birds, the testes are located in the coelomic cavity, not being accessible to reproductive evaluation as mammalian testes. The reproductive evaluation of roosters is based on phenotypic traits. Any changes on testes will be reflected on fertility levels. The aim of this paper was to evaluate the potential of association of phenotypic traits as body weight (BW), comb scores (COS), cloaca … Show more

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Cited by 3 publications
(4 citation statements)
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References 10 publications
(14 reference statements)
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“…It was to be expected thus body weight is a trait affected by age (Hocking and Bernard, 1997). The results are in accordance with the Leão et al (2017) who showed that body weight increased with age (25 to 45 weeks of age) in male broiler breeders. Meanwhile, Özdemir (2019) reported that an increase in bodyweight with age in both İspenç genotype roosters and chickens.…”
Section: Methodssupporting
confidence: 90%
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“…It was to be expected thus body weight is a trait affected by age (Hocking and Bernard, 1997). The results are in accordance with the Leão et al (2017) who showed that body weight increased with age (25 to 45 weeks of age) in male broiler breeders. Meanwhile, Özdemir (2019) reported that an increase in bodyweight with age in both İspenç genotype roosters and chickens.…”
Section: Methodssupporting
confidence: 90%
“…Kumar et al (2022) in a study carried on Aseel and Kadaknath chickens at 24 week of age reported a correlation between body weight and comb length. Almost similar study was carried by Leão et al (2017) that showed positive significant correlation between histological comb score and live weight. Also, Rizzi and Verdiglione (2015) reported that there was a correlation between comb and wattles weight and body weight in Italian purebreds of Robusta lionata.…”
Section: Methodssupporting
confidence: 52%
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“…Comb growth is closely related to testosterone and aggressiveness in poultry (Mukhtar & Khan2012). The stimulation of intracellular fluid generation by fibroblasts in the comb and dewlap by testosterone and dihydrotestosterone is known to affect the growth of these tissues (Leão et al 2017). The comb is located on the head and functions for thermoregulation (Iyasere et al 2021), so a large comb provides better temperature regulation than smaller combs.…”
Section: )mentioning
confidence: 99%