Two females with colored urogenital organ, rounded off abdomen, color egg released, and uniform size and four males with semen released under abdomen pressure were selected to determine the best insemination dose for artificial fertilization of grey jundia, Rhamdia quelen (Quoy & Gaimardm, 1824), oocytes. Females and males received two doses of carp pituitary extract: the first one of 0.5 and 0.25 mg.kg-1 and the second of 5.0 and 2.5 mg.kg-1 for females and males, respectively. Both females produced 169 […]

This experiment was conducted to determine the dietary threonine requirements for Nile tilapia. The fishes (37.61 ± 1.16 of initial weight) were allotted to a completely randomized design with four treatments, three replicates and 25 fishes per experimental unit. It was used a reference diet with 27% of CP and 3,000 kcal of DE/kg, supplemented with L-threonine, resulting in diets with 0.92, 1.06, 1.21, and 1.35% of total threonine. Synthetic amino acids were added to mantain their profile according to […]

The objectives of this trial were to analyze the skin histology and to evaluate the influence of tanning technique and the direction removal of samples on skin quality of silver-plated carp (Hypophtalmichthys molitrix). Twenty-three fishes were sacrificed and the skin was removed for tanning. Samples of three fishes were settled in formol 10% and, after inclusion in paraffin, the samples were cut with approximately 5 mm of thickness and colored by the hematoxylin-eosin technique (HE). After skin tanning, the samples […]

This research evaluated the effect of different methods (fillet skin removal and tanning methods [with or without chromium salts and bioleather]) on leather resistance characteristics of Nile Tilapia (Oreochromis niloticus). Skin from 40 tilapias (450 g) were removed: 20 by pliers and 20 by machine. After skin tanning, the samples were removed for resistance tests, which were done, in a climatized environment (23ºC) and 50% air relative humidity, with EMIC dynamometer, at removal speed of 100 ± 20 mm/mm. No […]

Data consisting of 47.668 records of a Nellore-Angus crossbred population, raised in several regions of Brazil, from 1991 to 2001, were used to estimate heritability for post-weaning daily gain (ADG) and for scrotal circumference at yearling age (SCY) using REML. Genetic and phenotypic trends for ADG were also estimated. The model used to estimate heritability and breeding values (BVs) for ADG included the fixed effects of breed composition (defined by the percentage of contribution of the Nellore breed of the […]

Data from a Nelore population was used to evaluate environmental effects and to estimate genetic parameters for days to calving (DPP). The influence of contemporary group, age at breeding season, month of last calving and weaning weight of the calf at the end of the breeding season were evaluated with fixed models. The weaning weight of the calf at the end of the breeding season was the only effect that did not influence DPP. Two different contemporary group (CG) definitions […]

This study aimed to evaluate 27 microsatellites for genetic characterization of Brazilian native goats using samples of hair collected from 332 animals of the Moxotó, Canindé, Serrana Azul, Marota, Repartida and Graúna breeds. Twenty-seven microsatellites were selected, amplified by polymerase chain reaction (PCR). The amplified products were submitted to electrophoreses in poliacrylamide gel using an ABI 377XL automatic sequencer. The number of alleles ranged between three (MAF209) and twenty-three (CSSM66). Averages of expected and observed heterozigosity were respectively 0,672 and […]

This experiment was carried out to study the effects of feeding trace minerals as organic complex on the performance and bone characteristics for pullets in the period from 7-12 weeks old. The treatments consisted of the supplementation of trace minerals in the inorganic form (control) and organic form with inclusion of 0.4% in the diet, that corresponds to the supplement levels of 60, 80, 70, 10, 1, and 0.3 ppm of zinc, iron, manganese, copper, iodine and selenium, respectively, and […]

Two trials were carried out to evaluate the effects of feeding of increasing defatted corn germ meal (DCGM) levels to broilers. In the first trial, for determination of nutritional value by method of total excreta collection, 120 19-day old broilers were allotted to a completely randomized design with three treatments and four replications of 10 birds each. The treatments consisted of corn and soybean meal-based diets with increasing DCGM levels: 0, 20, and 40%. Mean values of coefficients of metabolization […]

It was studied the effect of soybean meal (SBM) composition, varying in CP (SBM44%, SBM46% and SBM48%), on performance, metabolism and intestinal micrometry of broilers. Three SBM were produced from the SBM with 48.4% CP and increasing levels of toasted soybean hulls. Three hundred and twelve birds were assigned to three treatments with eight replicates. The diets were formulated for three periods: 1 to 7 days, 8 to 21 days and 22 to 42 days of age. All dietary treatments […]