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Melatonin concentrations in the two jugular veins, and relationship with the seasonal reproductive activity in goats
- Source :
- Arias Montano. Repositorio Institucional de la Universidad de Huelva, instname, Theriogenology, Theriogenology, Elsevier, 2010, 74 (2), pp.221-228. ⟨10.1016/j.theriogenology.2010.02.005⟩
- Publication Year :
- 2010
- Publisher :
- Elsevier BV, 2010.
-
Abstract
- The authors investigated whether melatonin concentrations vary between the two jugular veins and whether absolute (nocturnal) or relative (nocturnal/diurnal ratio) plasma melatonin concentrations are associated with seasonal reproductive activity measured by oestrus or ovulatory activity in Payoya goats Thirty-two adult Payoya goats were penned under natural photoperiod. Oestrus activity was tested daily using aproned males-twice a week plasma was sampled for progesterone Melatonin plasma concentrations were studied at each equinox and solstice of the year in Jugular samples taken simultaneously by venipuncture Nocturnal and diurnal plasma melatonin concentrations from each jugular vein were assessed in 3 and 2 plasma samples per goat, respectively, taken at hourly intervals in each period No differences in melatonin concentrations between the two veins were observed. but there was a significant interaction (P < 0 001) between jugular vein and animal in nocturnal melatonin concentrations. There was no effect of sampling period on melatonin concentrations and the coefficient of correlation between sampling periods was very high The analyses performed indicated that neither absolute nor relative melatonin concentrations were related with the dates of onset or end of ovulatory/oestrus activity Therefore, we concluded that in goats (1) melatonin concentrations are highly variable between jugular veins in the same individual but not in the general population, (2) melatonin concentrations are highly repeatable for each individual, and (3) absolute and relative amplitudes of melatonin concentrations are not linked to the seasonal breeding activity in Mediterranean goats (C) 2010 Elsevier Inc. All rights reserved
- Subjects :
- Time Factors
Sexual Behavior, Animal
Food Animals
Jugular vein
Blood plasma
Small Animals
Melatonin
media_common
2. Zero hunger
photoperiodism
0303 health sciences
education.field_of_study
Goats
Reproduction
04 agricultural and veterinary sciences
Goat
cardiovascular system
Female
Seasons
hormones, hormone substitutes, and hormone antagonists
medicine.drug
endocrine system
medicine.medical_specialty
media_common.quotation_subject
Population
VEINE JUGULAIRE
Biology
Nocturnal
03 medical and health sciences
Jugular
RACE PAYOYA
Internal medicine
medicine
Animals
education
030304 developmental biology
Estrous cycle
[SDV.BA.MVSA]Life Sciences [q-bio]/Animal biology/Veterinary medicine and animal Health
MELATONINE
Equine
0402 animal and dairy science
SAISONALITE
Seasonality
040201 dairy & animal science
Endocrinology
CHEVRE MEDITERRANEENNE
Animal Science and Zoology
Jugular Veins
Subjects
Details
- ISSN :
- 0093691X
- Volume :
- 74
- Database :
- OpenAIRE
- Journal :
- Theriogenology
- Accession number :
- edsair.doi.dedup.....36c20afd1c86049122dda34b328e48fc