Document Detail

Enhancement of the male effect on reproductive performance in female Mediterranean goats with long day and/or melatonin treatment.
MedLine Citation:
PMID:  22079098     Owner:  NLM     Status:  Publisher    
The aim of this study was to determine whether the male effect on reproductive performance in female Mediterranean goats could be enhanced if used in combination with long day and/or melatonin treatments. Thirty-two does were exposed to long days (16h of light/day) for 95days. At the end of this period, 16 received one melatonin implant (group LD-M) and 16 did not (group LD). Simultaneously, 16 does under natural photoperiod were implanted with melatonin (group M) or given no treatment (group C, n=16). On April 14th, after 49days of isolation from males, all does were exposed to bucks fitted with marking harnesses. Oestrous activity, as detected by visual observation, was recorded daily. Transrectal ultrasonography was used to record ovulation, and ovarian activity confirmed by determining plasma progesterone concentration. Oestrous activity, ovulation and fertility were greater in all treatment groups compared with group C (P<0.05), but no differences in ovulation rate or litter size were observed (P>0.05). Productivity (mean number of kids per female) of the LD-M and M groups was significantly greater than in group C (1.50±0.01 and 1.37±0.01 vs. 0.69±0.01 kids, respectively) (P<0.05). Combining melatonin treatment with natural or artificial long days adds to the impact of the male effect.
Luis A Zarazaga; Irma Celi; José L Guzmán; Benoît Malpaux
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-11-10
Journal Detail:
Title:  Veterinary journal (London, England : 1997)     Volume:  -     ISSN:  1532-2971     ISO Abbreviation:  -     Publication Date:  2011 Nov 
Date Detail:
Created Date:  2011-11-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9706281     Medline TA:  Vet J     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 Elsevier Ltd. All rights reserved.
Departamento de Ciencias Agroforestales, Universidad de Huelva, Campus de Excelencia Internacional Agroalimentario, ceiA3, Carretera de Palos de la Frontera s/n, 21819 Palos de la Frontera, Huelva, Spain.
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