Background: The purpose of the study was to determine if the effect of llama OIF on LH secretion is mediated by stimulation of the hypothalamus or pituitary gland.Methods: Using a 2-by-2 factorial design to examine the effects of OIF vs GnRH with or without a GnRH antagonist, llamas with a growin...
A poor nutritional state may explain the low fertility rates of domestic camelids from Puna herds. The objective of this study was to determine the relationship between the nutritional state of alpacas before the breeding period and their reproductive success. The body live weight (BLW) and body ...
Norambuena, Cecilia
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Hernández, Francisca
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Alfaro, Jorge
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Cárcamo, Gustavo
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Clavarría, Ángela
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Velasco, Miriam
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[Relationship between the nutritional state before the breeding period and the reproductive success in alpacas (Vicugna pacos) from the Chilean Puna]
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Relationship between the nutritional state before the breeding period and the reproductive success in alpacas (Vicugna pacos) from the Chilean Puna
This study was designed to determine the effect of location of the preovulatory dominant follicle and stage of ovarian follicle development on ovulation rate and embryo survival in alpacas. In Experiment 1, mature lactating alpacas were randomly assigned to one of two groups according to the loca...
Ratto Fuster, Marcelo
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Cervantes, M.
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Norambuena, C.
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Silva Jiménez, Mauricio
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Miragaya, M.
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Huanca, W.
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[Effect of location and stage of development of dominant follicle on ovulation and embryo survival rate in alpacas]
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Effect of location and stage of development of dominant follicle on ovulation and embryo survival rate in alpacas
Cumulus-oocyte complexes (COC) were collected from abbatoir-derived llama ovaries and cultured in vitro for 28, 30, or 36 h at 39°C in 5% CO 2 to determine the time required for maturation. The majority of COC (n = 298, 87%) were classified as categories 1 and 2 (COC with ≥5 layers or 2-4 compact...