Although fish nutrition science is far from establishing general standards of nutritional requirements, the need for developing low impact feeds has long been included in the agenda of aquaculture’s international scientific and business communities of. Not only is absolutely possible to formulate environmental friendly feeds, as it is necessary modeling the formulation of these feeds. However, it is necessary higher accuracy to develop species-specific formulations, considering interactions of the biology and nutritional physiology of the species with the feedstuffs and […]

In order to evaluate diets with high nutritional density, with or without industrial amino acid supplementation, adjusted at net energy base, it was used 80 pluriparous lactating sows with the same genetic pattern, distributed in an experimental block design composed of four diets, 20 blocks, considering each sow an experimental unity. The criteria used for formation of the blocks were the weight and parity order. Diets were formulated by the combination of four levels of crude protein (18.33; 15.23; 19.63; […]

It was evaluated the addition of calcium oxide (0; 0.5; 1.0; 1.5; and 2.0% of dry matter) effect on the chemical composition and ruminal degradability of the dry matter and neutral detergent fiber, on the losses of dry matter, and on the microbial population in sugar cane silages. A design with five levels of calcium oxide and three replications was used. All the variables were influenced by the addition of calcium oxide in the silages, except the composition in acid […]

Athletic production is what is sought from the horse. As mammary development is important to the dairy cow, skeletal development is important to horses meeting their production goals. As any integrative physiologist will appreciate, the variables that come together to result in optimal skeletal development are complex. Nutrition is one of these, and it contains two broad variables; the supply of dietary nutrients and energy. This presentation will focus on dietary energy and its links with skeletal development. I propose […]

Reproductive capacity is controlled by a large number of factors such as season, social interactions and metabolic status. However, the influence of emotional reactivity on reproductive success has not been intensively investigated in farm animals. In this review, we define emotion reactivity and the expression of its inter individual variability named temperament. We briefly describe our protocol to measure temperament in sheep and discuss the heritability of temperament traits. Using the results obtained from our flock of sheep selected for […]

The objective of this paper is to discuss the formation of partnerships, networks and strategic alliances in the production chain of Brazilian beef. The basic concepts of networks, strategic alliances and, cooperation are discussed. Four cases of alliances are analyzed, based on the existent literature. Finally, the work is finished pointing the success reasons in an alliance.

The aim of the review is to show the major scientific advances achieved in the animal reproduction area and how they can affect the productive and reproductive performance of cattle in Brazil. The knowledge about the mechanisms involved in the reproductive physiology control, in endocrine, cellular and molecular level allowed the development of reproductive biotechnologies. Among these the TAI has been used in large scale, with some advantages such as the multiplication of genetically superior animals, increasing on birth rate […]

In this review article we present an overall summary of the role that high-grain/low forage diets have on rumen composition of microbiota and how changes in the diet affect the release of bacterial cell wall components that are toxic to the host. One of these toxic compounds is lipopolysaccharide or endotoxin, a component of the outer membrane of all Gram-negative bacteria. Moreover, data are provided that support the concept that endotoxin translocates into the blood circulation and show that rumen […]

Water is a nutrient of extreme importance for animals and must be considered vital in any rearing phase. The increasing scarcity of this precious natural resource has concerned different segments of society in order to find solutions for rational and sustainable use of this nutrient. Small ruminants, especially sheep and goats, have social and economic importance due to their great ability in adapting to adverse environmental conditions and using water efficiently. Thus, they might be a good alternative to mitigate […]

It was evaluated in this work, the degree of natural infestation by external parasites in beef cattle females from three genetic groups. Countings of cattle tick (Rhipicephalus (Boophilus) microplus), horn fly (Haematobia irritans) and beef-worm (Dermatobia hominis) were performed from July 2003 to December 2004 in females from the genetic groups Nellore (NE), Angus x Nellore (AN), Canchim x Nellore (CN), and Simmental x Nellore (SN) naturally infested. It was realized from 6 to 10 countings in each animal, totalizing […]