+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Gnrh use in sexual cycle control of rasa aragonesa ewes



Gnrh use in sexual cycle control of rasa aragonesa ewes



Archivos de Zootecnia 37(137): 51-60



Two experiments for GnRH practical use (a few applications -1 or 3- and various doses -5 to 100 g-) for sexual cycle control for Rasa Aragonesa ewes were carried out in seasonal anoestrus (March-April 1986, experiment 1: 108 ewes in 7 groups, two controls) or in moderate sexual activity season (January 1987, experiment 2: 40 ewes in 4 groups, one control), with progestagen treatment. For the first experiment, fertility rate at induced oestrus was significantly highest for the two control groups (43.75 and 46.67%) than for experimental ones (0 to 18.75%) except for group 4 (37.50%), although a recovery in 2nd oestrus for the group 6 (smallest doses of GnRH) was observed. In experiment 2, GnRH application at mating did not affect fertility rate except in group 2, where treatment was applied 24 hours after sponge removal and his figures were improved in the 2nd oestrus; furthermore, these last animals had the highest ovulation rate (1.62 vs. 1.20 for the other experimental groups and 1.11 for the control); it suggests those ewes had no luteal function. The results indicate that GnRH practical use in seasonal anoestrus does not induce follicular growth and normal luteal function; nevertheless, results in experiment 2 are not clear enough, and some deeper studies should be carried out.

Please choose payment method:






(PDF emailed within 1 workday: $29.90)

Accession: 005532241

Download citation: RISBibTeXText


Related references

The crossbreeding of finnish landrace and romanov breeds with rasa aragonesa 1. production growth and carcass characteristics of f 1 and rasa aragonesa lambs. Anales Instituto Nacional de Investigaciones Agrarias Serie Ganadera (20): 25-46, 1984

Opioidergic and nutritional involvement in the control of luteinizing hormone secretion of postpartum Rasa Aragonesa ewes lambing in the mid-breeding season. Animal Reproduction Science 52(4): 267-277, 1998

The possibility of selecting against seasonality of reproduction in Rasa Aragonesa ewes. 38th Annual Meeting of the European Association for Animal Production, Lisbon, Portugal, 28 September 1 October 1987 Volume 2 Commissions on cattle production, sheep and goat production, pig production and horse production: 950-951, 1987

Effects of passive immunization against testosterone in rasa aragonesa ewes. Investigacion Agraria Produccion y Sanidad Animales 5(1-2): 25-32, 1990

Estimating fat reserves in Rasa Aragonesa ewes: A comparison of different methods. Canadian Journal of Animal Science 83(4): 695-701, 2003

Lipogenic activity in Rasa Aragonesa ewes of different body condition score. Canadian Journal of Animal Science 85(1): 101-105, 2005

Clinical chemical values and variations in Rasa Aragonesa ewes and lambs. Small Ruminant Research 13(2): 133-139, 1994

Effect of melatonin and plane of nutrition on reproductive parameters of Rasa Aragonesa ewes. ITEA Produccion Animal 98(1): 51-58, 2002

Determination of ovulation time in Rasa Aragonesa ewes after treatment by ear-implant with SC-21009. VIIIth International Congress on Animal Reproduction and Artificial Insemination, Krakow, July 12-16, 1976 Proceedings Volume I Communication Abstracts: 168, 1976

Effect of exogenous melatonin on in vivo and in vitro prostaglandin secretion in Rasa Aragonesa ewes. Theriogenology 60(7): 1345-1355, 2003

The effects of exogenous melatonin on wool quality and thyroid function in Rasa Aragonesa ewes. Spanish Journal of Agricultural Research 5(2): 164-171, 2007

Changes in adipocyte volume and body condition score in rasa aragonesa ewes during lactation and after drying off. Annales de Zootechnie 38(2-3): 83-90, 1989

Freemartinism and FecXR allele determination in replacement ewes of the Rasa Aragonesa sheep breed by duplex PCR. Theriogenology 72(8): 1148-1152, 2009

Performance of Romanov X Rasa Aragonesa ewes in a grazing system on irrigated areas in Aragon, Spain. 38th Annual Meeting of the European Association for Animal Production, Lisbon, Portugal, 28 September 1 October 1987 Volume 2 Commissions on cattle production, sheep and goat production, pig production and horse production: 1062-1063, 1987

Regulation of LH secretion during seasonal anestrus by dopaminergic pathways in Rasa Aragonesa ewes treated or not with melatonin. Canadian Journal of Animal Science 83(2): 311-313, 2003