Results 131 to 140 of about 594 (167)
The presence of small ruminant lentiviruses in Mexican Pelibuey sheep
Theriogenology, 2016 The transmission frequency of small ruminant lentiviruses (SRLVs) through the placenta is controversial and may be associated with breed susceptibility. In Mexico, SRLV infections in sheep have been poorly studied. This work explores the presence of antibodies and proviral DNA in Mexican Pelibuey sheep. Enzyme-linked immunosorbent assays (ELISAs; three
Damian DE ANDRÉS +2 more
exaly +4 more sources
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Phenotypic expression of parasite susceptibility to Haemonchus contortus in Pelibuey sheep
Veterinary Parasitology, 2017The objective of this study was to determine if the mean faecal egg count (FEC) from a first experimental Haemonchus contortus infection could be used to classify parasite-naïve Pelibuey hair sheep as parasite-resistant high responders and parasite-susceptible low responders.
J F J Torres-Acosta +2 more
exaly +3 more sources
Influence of FecGE mutation on the reproductive variables of Pelibuey ewes in the anestrus period
Tropical Animal Health and Production, 2021The growth and differentiation factor 9 (GDF9) intervenes in the fecundity and prolificacy of the ewe, which are important variables that participate in the reproductive efficiency of a flock. The objective of this study was to evaluate the influence of FecGE mutation of the gene GDF9 in the natural response of the manifestation to estrus, return to ...
Canuto Muñoz-García +6 more
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Endocrinology of the Postpartum Period in the Pelibuey Ewe
Journal of Animal Science, 1987The postpartum (PP) period in the Pelibuey ewe was studied. Laparotomies were performed on 14 ewes in the first year at d 10, 20 and 30 PP, and at d 10 and 20 PP in the second year on 17 ewes. Progesterone concentrations were determined in serum taken daily, from 4 to 7 d after parturition until estrus.
A, Gonzalez +3 more
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Fattening of Pelibuey hair sheep and crossbreds (Rambouillet-Dorset×Pelibuey) in the Mexican tropics
Small Ruminant Research, 1998A study was conducted on a farm in tropical Mexico with 19 crossbred (Pelibuey×Rambouillet-Dorset) and 20 Pelibuey hair sheep lambs, each group subdivided into male and female subgroups. Feeding in total confinement was with a ration of 6% guinea grass and 94% of a mixture of 37.5% poultry litter, 37.5% corn, 14.5% molasses, 7% coconut oilmeal, 2% urea,
J Pineda +3 more
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Reproductive activity of Pelibuey and Suffolk ewes at 19° north latitude
Animal Reproduction Science, 2007Under photoperiod regulated conditions, some Pelibuey ewes appear to express estrous cycles continuously throughout the year. Ovulatory activity of Suffolk ewes has not being determined at 19 degrees N. The aim of the present study was to describe the annual reproductive cycle of Pelibuey and Suffolk ewes under natural conditions at 19 degrees N.
J Valencia
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Morphological characterization of Pelibuey sheep in Colima, México
Tropical Animal Health and Production, 2012A study was conducted with the objective to characterize the morphology of Pelibuey sheep in the state of Colima, Mexico. A total of 386 sheep were scored for 12 body measurements in addition to live weight and five racial and eight functional indices were calculated.
Victalina, Arredondo-Ruiz +7 more
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Effects of crossbreeding Mexican Pelibuey sheep with Rambouillet and Suffolk on carcass traits
Meat Science, 2005Fifty nine lambs: Pelibuey (P), Suffolk×Pelibuey (SP) and Rambouillet×Pelibuey (RP), were used to evaluate the effect of crossbreeding on carcass characteristics and composition. Following carcass evaluation, muscle, bone, subcutaneous, seam, internal, total fat and other tissues were dissected.
J, Gutiérrez, M S, Rubio, R D, Méndez
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Circannual estrous variations and ovulation rate in Pelibuey ewes
Small Ruminant Research, 1992Abstract Twelve cycling, mature ewes were kept with two vasectomized rams under constant nutrition maintenance conditions to study annual estrous activity and ovulation. Mean ovulation rate per month was 1.2 corpora lutea (CL) /ewe and 1.72 CL/ewe ovulating, mean proportion of ewes ovulating per month was 69%; proportions of ewes ovulating varied ...
A. Gonzalez +3 more
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Estimation of mature live weight of Mexican Pelibuey sheep
Proceedings of the British Society of Animal Science, 2007Current nutritional models as the CNCPS-sheep (Cannas et al., 2004) are built with the possibility to consider breed effects. An important effect included in the prediction of live weight gain is the maturity index of the animal (the actual weight of the animal in relation to their adult weight). During a concurrent evaluation of the CNCPS-sheep model,
F. Duarte +2 more
openaire +1 more source