Made available in DSpace on 2022-04-28T19:05:19Z (GMT). No. of bitstreams: 0 Previous issue date: 2016-01-01; An amount of 82 nulliparous female water buffaloes were studied to compare the signs of induced estrus with hormone protocols (P). Treatments PI (n=29), PII (n=28) and PIII (n=25) received 2.0 mg of estradiol benzoate and intravaginal device of progesterone for nine days. After removing the device, 0.5 ...
Made available in DSpace on 2022-04-28T19:05:20Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-01-01; A total of 120 nulliparous water buffaloes were used to evaluate the effect of different hormonal protocols with fixedtime artificial insemination on the pregnancy rate. Protocol 1 received 2.0 mg of estradiol benzoate and a progesterone intravaginal device for nine days. After the device removal, 0.5 m...
Made available in DSpace on 2022-04-29T08:44:53Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-11-16; This study aimed to characterize the annual reproductive cycle of Santa Inês sheep in the Fluminense lowland region (latitude 22° 27′ 45″ south, Rio de Janeiro, Brazil) between September 2011 and August 2012. Ten ewes were maintained in a semi-intensive system under natural photoperiods with access to p...
Made available in DSpace on 2022-04-29T08:44:54Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-03-01; The study aimed to evaluate the reproductive, metabolic and hormonal profiles of Santa Inês ewes during winter and summer in the tropical climate of Rio de Janeiro State, Brazil. The ewes (n = 16) were prepared for induction of synchronised oestrus with a short-term hormonal treatment, and follicular dy...
Cooling and freezing processes cause physical and chemical damage to sperm by cold shock and oxidative stress. This study aimed to evaluate the effect of two antioxidants on sperm parameters of cooled and frozen-thawed ram semen diluted in an egg yolk-based extender. Semen was collected from 30 rams and processed in two consecutive experiments to test the inclusion of different concentrations of quercetin and b...
The use of cooled semen in artificial insemination operations results in higher pregnancy rates than the use of frozen semen. This result seems to be related to the more severe damage triggered by the freezing process than that observed during refrigeration. Due to its ability to bind to sperm-binding proteins and calcium ions, sodium caseinate has been studied as a substance capable of preventing early sperm c...
Made available in DSpace on 2018-11-12T17:27:25Z (GMT). No. of bitstreams: 0 Previous issue date: 2016-06-01. Added 1 bitstream(s) on 2021-07-14T17:51:36Z : No. of bitstreams: 1 S1809-68912016000200217.pdf: 362165 bytes, checksum: 0f7d26e6f271c124dab70a242b342218 (MD5); Resumo Vários fatores extratireoidianos como idade, raça, doenças concomitantes e fármacos podem influenciar na função e no diagnóstico do hipo...
Aiming to determine the relationship between the frequency of testicular shape and the andrological aspects in young Nellore bulls, 18,676 animals were assessed. All andrological examinations were performed between the years 2000 and 2008. Animals were classified as able for breeding, able for breeding in natural mating system, unable for breeding and discarded. The testicular shape was classified as long, fair...
Estrus synchronization is a reproductive biotechnology used to improve artificial insemination or pairing through the manipulation of the estrous cycle at a desirable time. Employing this technique in captive pacas (Cuniculus paca L.) is important because it creates expectation of meeting the demand for paca meat and, consequently, reduces poaching. Thus, this research aims to verify the effect of a progestogen...