Supplementation of Slow-Release Melatonin Improves Recovery of Ovarian Cyclicity and Conception in Summer Anoestrous Buffaloes (Bubalus bubalis)
| Autor: | SK Dabas, Ashwani Kumar, A. S. Mahla, S. Mehrotra, Mahak Singh, YK Soni, Ravjibhai Karshanbhai Chaudhari, K. Narayanan, N. Srivastava, Gurmej Singh, B.L. Kumawat, V. P. Maurya |
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| Rok vydání: | 2015 |
| Předmět: |
medicine.medical_specialty
Buffaloes Ovary Estrous Cycle Biology Insemination Anestrus Melatonin 03 medical and health sciences Subcutaneous injection 0302 clinical medicine Endocrinology Animal science Pregnancy Internal medicine medicine Animals Insemination Artificial Progesterone Estrous cycle 030219 obstetrics & reproductive medicine 0402 animal and dairy science Radioimmunoassay 04 agricultural and veterinary sciences 040201 dairy & animal science medicine.anatomical_structure Delayed-Action Preparations Fertilization Animal Science and Zoology Female Seasons Corn oil Biotechnology medicine.drug Hormone |
| Zdroj: | Reproduction in domestic animals = Zuchthygiene. 51(1) |
| ISSN: | 1439-0531 |
| Popis: | The role of melatonin as a protective neurohormone against restoring cyclicity in summer anoestrous animals in photoperiod species has gained wider acceptance. This study was designed to uncover the evidence the slow-release melatonin (MLT) has on initiation of ovarian cyclicity and conception rate (CR) in summer anoestrous buffaloes. Thus, buffaloes diagnosed as summer anoestrous (absence of overt signs of oestrus, concurrent rectal examination and radioimmunoassay for serum progesterone at 10 days interval) were grouped as untreated (Group I, sterilized corn oil, n = 8) and treated (Group II, single subcutaneous injection of MLT @18 mg/50 kg bwt in sterilized corn oil, n = 20). Animals treated and detected in oestrus were artificially inseminated (AI) followed by division into Group III (second dose of MLT on 5th day post-AI, n = 8) and Group IV (no melatonin administration, n = 10). Blood samples were collected at 4 days interval for estimation of serum MLT, progesterone and oestrogen using radioimmunoassay kit. Mean oestrous induction rate (OIR), oestrous induction interval (OII), interoestrous interval (IOI) and CR were estimated. Compared to control, concentration of melatonin was significantly (p < 0.05) higher in treated group ranging from 14.34 ± 1.72 to 412.31 ± 14.47 pg/ml whereas other two hormones did not show any concentration difference. Melatonin-administered buffaloes showed significantly (p < 0.05) higher (90%) OIR with OII of 18.06 ± 1.57 days. Results showed improvement in conception rate in buffaloes administered with post-insemination melatonin. It can be concluded from the study that slow-release melatonin supplementation restored cyclicity in summer anoestrous animals resulting in improvement in conception rate in buffaloes. |
| Databáze: | OpenAIRE |
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