Advanced breeding and 'buck effect' in indigenous Greek goats
| Autor: | Bernard Leboeuf, Melpomeni Avdi, M. Terqui |
|---|---|
| Přispěvatelé: | Insémination Caprine et Porcine (ICP), Institut National de la Recherche Agronomique (INRA), Physiologie de la reproduction et des comportements [Nouzilly] (PRC), Institut National de la Recherche Agronomique (INRA)-Institut Français du Cheval et de l'Equitation [Saumur]-Université de Tours-Centre National de la Recherche Scientifique (CNRS), Institut National de la Recherche Agronomique (INRA)-Institut Français du Cheval et de l'Equitation [Saumur]-Université de Tours (UT)-Centre National de la Recherche Scientifique (CNRS), ProdInra, Migration |
| Rok vydání: | 2004 |
| Předmět: |
0303 health sciences
General Veterinary [SDV]Life Sciences [q-bio] 0402 animal and dairy science 04 agricultural and veterinary sciences [INFO] Computer Science [cs] Biology 040201 dairy & animal science [SDV] Life Sciences [q-bio] 03 medical and health sciences Animal science [INFO]Computer Science [cs] Animal Science and Zoology Flock ComputingMilieux_MISCELLANEOUS 030304 developmental biology Demography |
| Zdroj: | Livestock Production Science Livestock Production Science, Elsevier, 2004, 87, pp.251-257 |
| ISSN: | 0301-6226 |
| Popis: | This article presented the results of “buck effect” in local Greek genotypes. These observations were made in an experimental station and in private flocks where sexual activity of males and females were determined. Testis volume increased two-fold from January to July. Intensity of sexual behaviour also rose in March when five of 14 bucks displayed sexual behaviour. All five bucks remained seasonally active throughout the experiment. The volume of their ejaculate increased from 0.8 to 1.2 ml, but the total counts of spermatozoa and the concentration decreased. Motility and viability remained high (4% and 70–80%, respectively) during the full experimentation period and did not show significant seasonal differences. Ovarian activity of some females continued up to March but all females were in ovarian inactivity throughout spring. Despite this 100% inactivity, all ovulated after buck introduction. This suggested that the breeding period could be advanced using “buck effect”, with males that where not at the maximum of their sexual activity. |
| Databáze: | OpenAIRE |
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