Follicular Dynamics and Oestrous Detection in Thai Postpartum Swamp Buffaloes (Bubalus bubalis)
| Autor: | S. Sirivaidyapong, Mongkol Techakumphu, M. Yindee, Ben Colenbrander, Heriberto Rodriguez-Martinez, C. Lohachit, A. Na-Chiangmai, G.C. van der Weyden |
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| Rok vydání: | 2011 |
| Předmět: |
Ovulatory follicle
geography medicine.medical_specialty geography.geographical_feature_category biology media_common.quotation_subject Spontaneous ovulation biology.organism_classification Swamp Cervical mucus Endocrinology Animal science Internal medicine Follicular phase medicine Animal Science and Zoology Bubalus Ovulation Biotechnology media_common |
| Zdroj: | Reproduction in Domestic Animals. 46:e91-e96 |
| ISSN: | 0936-6768 |
| DOI: | 10.1111/j.1439-0531.2010.01647.x |
| Popis: | Contents This study characterized follicular activity and oestrous behaviour from 5 to 9 days post-calving up to the 4th ovulation postpartum (pp) in 16 multiparous (range 2–7 parities) Thai swamp buffalo cows (Bubalus bubalis), aged 4–12 years and weighing from 432 to 676 kg. Ovarian follicular activity was examined by transrectal ultrasonography (TUS) every morning. Oestrous detection was performed twice daily by direct personal observation of behaviour and for presence of clear cervical mucus discharge and indirectly by video camera recording during 21 h/day. A follicular wave-like pattern was present before the 1st ovulation leading to short oestrous cycles. Growth rates and maximum diameters of the ovulatory follicles did not differ between the 1st and 4th ovulations. However, growth rate for non-ovulatory dominant follicles (DF) before the 1st ovulation was lower than for the ovulatory follicle (p |
| Databáze: | OpenAIRE |
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