ABSTRACT This study investigates whether pre-pubertal scrotal circumference (SC) and anti-Müllerian hormone (AMH) concentrations indicate sexual precocity in Brahman and Simmental bulls. Fifty-three bulls (Brahman, n = 27; Simmental, n = 26) were used. Scrotal circumference was measured at three periods: pre-puberty (Brahman = 19.99±0.20 months; Simmental = 9.13±0.17 months), puberty (Brahman = 21.42±0.20 months; Simmental = 18.26±0.17 months), and post-puberty (Brahman = 33.34±0.55 months; Simmental = 24.07±0.17 months). A single sample taken at the pre-pubertal period was used for […]

An experiment was conducted to determine the effect of varying dietary supplemental inclusion levels of onion and garlic mixture on semen quality characteristics of Koekoek breeder cocks aged 35-41 weeks. The experimental diets were isocaloric and isonitrogenous but with different supplemental inclusion levels of onion and garlic. A complete randomized design was used for the experiment. The three dietary supplemental levels based on garlic and onion supplemental inclusion levels were Q0 (0 g onion and 0 g garlic per 600 […]

The objective of this study was to evaluate the putative effects of the use of coffee husk as floor covering on boar semen quality. Sixteen boars were divided into two groups. The first group was held in a conventional system with a compact floor. The second group was kept on a compact floor covered with coffee pods. The experimental period was 60 days. Levels of caffeine and chlorogenic acid in the insemination doses (ID) before and after 96 h of […]

The objective of this study was to evaluate the effect of adding different doses of insulin to swine semen processed and stored at 15 ºC. The experiment used sixteen ejaculates from four commercial breeding pigs, distributed in a randomized block design (ejaculate) with split plot along time (0, 24, 48 and 72 hours of storage) with four treatments (insulin levels – 0.0 4.0 8.0 and 12.0 IU per dose) and 16 repetitions. The experimental unit was made of two insemination […]

Objetivou-se avaliar os efeitos da adição de fontes de óleo e dos níveis de suplementação de vitamina E na ração sobre a criopreservação de sêmen suíno. Foram utilizados 24 suínos machos reprodutores Dalboar 85, com idades de 12 a 18 meses, distribuídos em delineamento inteiramente casualizado, em arranjo fatorial 2 × 3, com duas fontes de óleo (soja e salmão) e três níveis de vitamina E (150, 300 e 450 mg/kg). O sêmen foi coletado semanalmente (1 coleta/macho), diluído com […]

Objetivou-se avaliar o efeito da adição de fontes de óleo e dos níveis de suplementação de vitamina E na ração sobre as características do sêmen suíno resfriado a 17ºC e 5ºC. Foram utilizados 24 suínos machos reprodutores Dalboar 85 distribuídos em delineamento inteiramente casualizado, em arranjo fatorial 2 x 3, com duas fontes de óleo (soja e salmão) e três níveis de antioxidantes (150, 300 e 450 mg de vitamina E/kg). Nos animais sob suplementação com óleo de salmão, a […]