Results 171 to 180 of about 2,138 (195)
Some of the next articles are maybe not open access.
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
openaire +1 more source
A field study of reproductive performance and productivity of Pelibuey ewes in Southeastern Mexico
Tropical Animal Health and Production, 2013The objective was to evaluate the reproductive performance and productivity of Pelibuey ewes in two flocks in Southeastern Mexico. Animals grazed on irrigated star grass (Cynodon plectostachyus). In flock 1, lambs grazed with their mothers from 7 to 70 days of age (weaning age), whereas in flock 2, they were confined and offered chopped grass, a ...
Juan Gabriel, Magaña-Monforte +3 more
openaire +2 more sources
Phenotype Characterization of Pelibuey Native Lambs Resistant to Haemonchus contortus
Annals of the New York Academy of Sciences, 2008Specific phenotypic traits of the blood‐feeder nematode Haemonchus contortus were characterized on Pelibuey native, cross‐breed sheep in a tropical region of Mexico with background of anthelmintic problems. Data were collected on 4‐month‐old lambs (n= 63) and analyzed weekly in three stages: stage 1 (S1, not infected (0–3 weeks)); S2, first infection ...
Jorge L, Gonzalez +7 more
openaire +2 more sources
Seasonal variations in circulating testosterone and luteinizing hormone in Pelibuey lambs
Small Ruminant Research, 1992Abstract This study was carried out to determine seasonal variations in circulating testosterone and luteinizing hormone levels in ram and castrate male Pelibuey lambs. Body weights at the end of the study were 36.9 ± 1.2 kg for the intact and 38.8 ± 1.6 kg for the castrate lambs.
A. González +3 more
openaire +1 more source
Productivity of Pelibuey and Blackbelly ewes in Mexico under extensive management
Small Ruminant Research, 1996Abstract Data of 550 Pelibuey (PB) and 250 Barbados Blackbelly (BB) ewes mated during 1987–1990 were used to determine their productivity and some other economic traits at lambing and weaning. Ewes were grazed on native vegetation and given a grain-based supplement during the dry season (November–May) of each year.
J.C. Segura, L. Sarmiento, O. Rojas
exaly +2 more sources
Daily production and testicular and epididymal sperm reserves of Pelibuey rams
Theriogenology, 1994Abstract Eleven Pelibuey rams 3.5 to 4 yr of age and weighing 48 to 60 kg, were used to determine daily sperm production, testicular sperm production and epididymal sperm reserves. Previous to castration, semen was collected from each animal twice daily for 60 consecutive days.
J. Martínez, T. Limas, N. Perón
openaire +1 more source
Determination of carcass traits in Pelibuey ewes using biometric measurements
Small Ruminant Research, 2017Abstract The objective of this study was to evaluate de relationship between biometric measurements (BM) and carcass traits of 28 Pelibuey ewes. The BM were obtained the day before the slaughter and included height at withers (HW), rib depth (RD), body diagonal length (BDL), body length (BL), pelvic girdle length (PGL), rump depth (RuD), rump height (
Emmanuel Bautista-Díaz +8 more
openaire +1 more source
FecGE mutation in pelibuey sheep
Animal Genetics, 2020Elizabeth Pérez‐Ruiz +5 more
openaire +2 more sources
infection induces a variable immune response in resistant and susceptible Pelibuey sheep
Veterinary Immunology and Immunopathology, 2021Glafiro Torres-Hernández +2 more
exaly