The experiment was carried out to compare the performance of two Nile Tilapia strains (Thai and common) during the initial and growing phases. The fishes (50 in the starting phase and 40 in the growing phase) were assigned to a completely randomized design with two treatments and five replications. Better results were observed for the weight gain percentage, daily weight gain, feed:gain ratio and economic viability in both experimental phases, survival in the starting phase and final size in the […]

The experiment aimed to compare the use of 5% of inclusion of fish meal (FP), poultry by-products meal (FV), meat and bones meal (FO) and silkworm meal (FC) and a control (soybean meal and corn) as atractants on feed intake and performance of Nile tilapia fingerlings. One hundred and sixty eight Nile tilapia fingerlings (Thai strain) sexually reversed, with average initial weight of 0.72 ± 0.18 g were assigned to a completely randomized experimental design, with five treatments and five […]

The objective of this work was to verify the presence of endocrine cellules in the medium and posterior intestines, or rectum, and in the piloric cecum in three tropical freshwater Teleostei species with different feeding habits: piracanjuba, (Brycon orbignyanus) and piau (Leporinus friderici) omnivorous; and surubim (Pseudoplatystoma coruscans), carnivore. Seven exemplars of piracanjuba, with average weight and standard length of 410.16 ± 66.33 g and 27.42 ± 1.17 cm, respectively, 13 exemplars of piau with average weight and standard length […]

The knowledge of the anatomy of tropical forage grasses may help to improve its use as ruminant feed. The aim of this paper was to determine the area occupied by different tissues in stem and leaf in three cultivars of elephantgrass (Pennisetum purpureum Schumach.). Five plants of each cultivar were selected and segmented into three parts (apical, median and basal), this material being collected after ten weeks of regrowth. The stems were separated into two parts and the leaves segmented […]

The digestion of forages is determined by chemical and anatomical factors, which are affected by the growing stage of species. As the growing plants show a variety of tissues in anatomy and composition, it’s important to determine their relative participation in total dry matter production, as well their digestion rates. The aim of this paper was to determine the digestibility and chemical composition of leaf fractions (limbo, keel, sheath), as well as of the upper, median and lower part of […]

Silage evaluation of elephantgrass cv. Taiwan A146 was done at Faculdade de Medicina Veterinária e Zootecnia – UNESP-Botucatu. Six treatments were used with four replications as follows: A – elephantgrass with eight hours of wilting under the sun; B – elephantgrass; C – elephantgrass (98%) plus cassava meal (2%); D – elephantgrass (96%) plus cassava meal (4%); E – elephantgrass (92%) plus cassava meal (8%); F – elephantgrass (88%) plus cassava meal (12%). The efficiency meal (12%) was greater than […]

The experiment was carried out to evaluate saponins and tannins contents, the proteins solubility (PS) of 28 alfalfa cultivates: Crioula, Monarca, BR 4, Alto Great, MH 4, SW 9210 A, 5929, BR 1, El Grande, 5715, MH 15, Valley Plus, BR 2, Rio, SW 8210, Maricopa, ICI 990, 5888, P 30, Alfa-200, WL 516, SW 8112 A, BR 3, Florida 77, Araucana, Falcon, Semit 921 and Sutter. The analyzed material came from the 10th and 14th harvests (which occurred on […]

The objective of the experiment was to study the effect of pretreatment with 500 mg of sometribove (rbST) on superovulatory response, on number and embryos quality of twenty six crossbred holstein-zebu heifers, allocated into two treatments: T1 ¾ treated with rbST (n=13) and T2 – control (n=13). Thirteen superovulations were done between september and december of 1997 (period 1), and thirteen superovulations between the end of december 1997 and february of 1998 (period 2). For each period seven animals were […]

Embryos collections of foaling mares (n=19) and non-lactating mares (n=18) were compared. No differences were observed between treatments on embryo recovery rates (57.9% and 50.0%); on embryo age (7.84 and 7.86 days); on duration of collection (8.63 and 9.00 minutes); on recovery of flushed medium from the uterus (1921 and 1934 mL); on the size of 7-day embryo (.42 mm and .44 mm); on the size of 8-day embryo (1.11 mm and 1.66 mm); on the quality grade of the embryos (3.81 and 3.55); on […]

The evaluated animals has been bred fed only with grass, without any complementary alimentation during the dry season from 1988 to 1996. A total of 1206 observations of the gestation lenght (LG) was taken from the archives of the regional technical office of ABCZ (Escritório Técnico Regional da ABCZ) in Fortaleza – CE and from zoo-technical registers of the farm. For the statistical analyses of the data was used the SAS (Statistical Analysis System, 1990), through procedure GLM (general linear […]