{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T00:58:36Z","timestamp":1791248316525,"version":"4.1.0"},"reference-count":23,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2016,9,30]],"date-time":"2016-09-30T00:00:00Z","timestamp":1475193600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"Conselho Nacional de Pesquisa"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Reprod Domestic Animals"],"published-print":{"date-parts":[[2017,2]]},"abstract":"<jats:title>Contents<\/jats:title>\n                  <jats:p>\n                    The objective of this study was to detect the reasons of rooster's fertility decrease at 50\u00a0weeks of age. Therefore, the reproductive system of broiler breeder roosters was laparoscopic, macroscopic and histopathology evaluated, and a comparison of the anatomical aspect with the sperm analysis and birds\u2019 age was realized. Cobb roosters (\n                    <jats:italic>n<\/jats:italic>\n                    \u00a0=\u00a059) were distributed into two groups (30 and 50\u00a0weeks). Evaluations were performed with laparoscopy, macroscopy and histopathology, and seminal quality, blood serum testosterone concentration and weight were also determined. The old roosters presented smaller testicle size, higher intensity epididymal lithiasis and lower testicle sperm production, compared to the young roosters. The use of the endoscope could easily distinguish a normal\u2010sized testicle than an atrophic one. Four old roosters with severe testicular atrophy did not show spermatogenesis, although three still had sperm in the ejaculate. This would falsely indicate a wrong diagnosis of normal fertility before the testicular atrophy took place. In conclusion, in addition to the weight increase with age, the testicular atrophy and impairment of sperm production seemed to be the main reason to the decrease in the rooster's fertility at 50\u00a0weeks of age. Therefore, the use of the laparoscopy as a way to detect the roosters with testicular atrophy before 50\u00a0weeks of age and their removal from them flock could be useful as a diagnostic tool to prevent the birds\u2019 fertility loss.\n                  <\/jats:p>","DOI":"10.1111\/rda.12804","type":"journal-article","created":{"date-parts":[[2016,9,30]],"date-time":"2016-09-30T01:24:24Z","timestamp":1475198664000},"page":"67-75","source":"Crossref","is-referenced-by-count":44,"title":["Detecting reproductive system abnormalities of broiler breeder roosters at different ages"],"prefix":"10.1111","volume":"52","author":[{"given":"MA","family":"Lagares","sequence":"first","affiliation":[{"name":"Department of Veterinary Clinic and Surgery Universidade Federal de Minas Gerais  Belo Horizonte Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"R","family":"Ecco","sequence":"additional","affiliation":[{"name":"Department of Veterinary Clinic and Surgery Universidade Federal de Minas Gerais  Belo Horizonte Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"NRS","family":"Martins","sequence":"additional","affiliation":[{"name":"Department of Preventive Veterinary Medicine Universidade Federal de Minas Gerais  Belo Horizonte Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"LJC","family":"Lara","sequence":"additional","affiliation":[{"name":"Department of Animal Science, Veterinary School Universidade Federal de Minas Gerais  Belo Horizonte Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"JSR","family":"Rocha","sequence":"additional","affiliation":[{"name":"Department of Animal Science, Veterinary School Universidade Federal de Minas Gerais  Belo Horizonte Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"DAR","family":"Vilela","sequence":"additional","affiliation":[{"name":"Instituto Brasileiro de Meio Ambiente e dos Recursos Naturais Renov\u00e1veis (IBAMA)  Belo Horizonte Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"VM","family":"Barbosa","sequence":"additional","affiliation":[{"name":"Department of Animal Science, Veterinary School Universidade Federal de Minas Gerais  Belo Horizonte Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"PF","family":"Mantovani","sequence":"additional","affiliation":[{"name":"Department of Preventive Veterinary Medicine Universidade Federal de Minas Gerais  Belo Horizonte Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"JFV","family":"Braga","sequence":"additional","affiliation":[{"name":"Department of Veterinary Clinic and Surgery Universidade Federal de Minas Gerais  Belo Horizonte Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"IS","family":"Preis","sequence":"additional","affiliation":[{"name":"Department of Veterinary Clinic and Surgery Universidade Federal de Minas Gerais  Belo Horizonte Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"VA","family":"Gheller","sequence":"additional","affiliation":[{"name":"Department of Veterinary Clinic and Surgery Universidade Federal de Minas Gerais  Belo Horizonte Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"PC","family":"Cardeal","sequence":"additional","affiliation":[{"name":"Department of Animal Science, Veterinary School Universidade Federal de Minas Gerais  Belo Horizonte Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"NC","family":"Bai\u00e3o","sequence":"additional","affiliation":[{"name":"Department of Animal Science, Veterinary School Universidade Federal de Minas Gerais  Belo Horizonte Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2016,9,30]]},"reference":[{"key":"e_1_2_9_2_1","first-page":"7","volume-title":"Proceedings of the ENCONTRO T\u00c9CNICO DE CI\u00caNCIAS AVI\u00c1RIAS","author":"Bai\u00e3o N. C.","year":"2001"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1637\/7192-040808R1"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.3382\/ps.0652330"},{"key":"#cr-split#-e_1_2_9_5_1.1","unstructured":"Cobb\u2010Vantress Inc. (2008).Breeder management guide[Internet].Siloam Springs AR:Cobb Vantress modified 2008 Dec 15"},{"key":"#cr-split#-e_1_2_9_5_1.2","unstructured":"cited 2009 Nov 19. Retrived from:http:\/\/www.cobbvantress.com\/contactus\/brochures\/Breeder_guide_2008.pdf"},{"key":"e_1_2_9_6_1","unstructured":"Fantini M. O. O. F. (2007).Efeitos da redu\u00e7\u00e3o do peso corporal sobre as caracter\u00edsticas reprodutivas de galos adultos de matriz pesada. Tesis 43p. (Doutorado em Ci\u00eancia Animal) Escola de Veterin\u00e1ria Universidade Federal de Minas Gerais."},{"key":"e_1_2_9_7_1","doi-asserted-by":"publisher","DOI":"10.1095\/biolreprod37.4.969"},{"key":"e_1_2_9_8_1","doi-asserted-by":"crossref","first-page":"237","DOI":"10.1002\/9781119265306.ch16","volume-title":"Reproduction in farm animals","author":"Froman D. 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