Suchergebnisse

Abstract
One of the most valuable foods is meat, due its nutritional value, largely determined by the essential amino acids, fatty acids, vitamins, minerals, etc. At the same time, concern needs to be given to health of consumers by used products with less calories, which can be ensured by greater variety of game animals, including also deer grown in captivity. The aim of our investigation was to compare the nutrition value of elk, wild deer, farm deer, roe deer, and wild boar that were killed during hunting in Latvia. Meat samples (m. logissimus lumborum) were collected in the autumn- winter season. The results of the conducted research suggest that game meat samples have higher protein and essential fatty acid content in comparison with domestic animals. The amount of fat in all analysed samples did not differ greatly, although the fatty acid content in wild game meat differed significantly. The fatty acid profile was used to calculate the atherogenicity index (AI), which has a positive correlation with the risk of cardiovascular disorders. The formula AI = [C12 : 0 + (C14 : 0 × 4) + C16 : 0 ] / (Total unsaturated fatty acids) was used to calculate the ratio of total saturated fatty acids, ω-6 and ω-3. Regarding the microelement content of meat there were great differences in iron and manganese concentration among animals.

Farm animals are constantly facing perturbations due to changing environmental and farm conditions. Characterization of the animal's response when it is facing perturbations that influence performance and health is of main concern to ensure sustainable livestock production. Indeed, a better understanding of the adaptation mechanisms used by the animal to cope with challenges (through resistance and resilience) is a prerequisite to propose adequate farm management strategies. Several experimental studies have been conducted to investigate the influence of the environment on animal performance. Mathematical models can be used consider and to quantify the systemic aspects of the animal's response to a perturbation. Existing models of farm animal performance have accounted to a limited extent for environmental perturbations. With novel monitoring technologies, it is now possible to evaluate the impact of these perturbations on the animal in real time and with a high frequency. We propose a mechanistic model to describe the influence of a generic perturbation of unknown origin on feed intake of growing pigs. The model is based on two sub-models: InraPorc, a model to describe the performance of the growing pig in a standard environment, and the well-known spring-and-damper system used in physics to describe the behavior of a system in presence of an external force. The InraPorc model was used to describe the phenotypic performance of the animal in the absence of acute perturbing factors. The spring-and-damper system included two parameters to characterize the adaptive response of animals when facing a perturbation. The main interest of this characterization is to define new standards to rank animals based on feed efficiency together with their adaptive capacity, and to identify potential correlation between performance and robustness traits. We can then propose model-derived traits for genetic selection of more efficient and robust animals. Currently, the model is able to simulate the performance of animals facing with a single perturbation. Future development of the model will include successive perturbations of known or unknown origin. This study is part of the Feed-a-Gene project and received funding from the European Union's H2020 program under grant agreement no. 633531.

Chapter 1. Introduction -- Chapter 2. Protein Requirement -- Chapter 3. Utilization of Proteinaceous Nutrients -- Chapter 4. Peptides or Amino Acids? -- Chapter 5. Amino Acid Functions and Requirements -- Chapter 6. Simple Amino Acids: Gly, Ala, Asp, Gln -- Chapter 7. The Versatile Amino Acid: Tryptophan -- Chapter 8. A Bunch of Amino Acids: Phe, Tyr, Branched-Chain AAs, Ser, Thr -- Chapter 9. Sulfur Amino Acids -- Chapter 10. Basic Amino Acids and Prolines -- Chapter 11. Taurine -- Chapter 12. Nonprotein Amino Acids -- Chapter 13. Glucose -- Chapter 14. Glucose Homeostasis -- Chapter 15. Glucose Intolerance -- Chapter 16. Carbohydrate Transport -- Chapter 17. Protein Sparing by Carbohydrates -- Chapter 18. Carbohydrate Preference and Metabolism -- Chapter 19. Regulatory Potential of Carbohydrates -- Chapter 20. Oligosaccharides -- Chapter 21. Starch -- Chapter 22. Non-Starch-Polysaccharides & Fibers -- Chapter 23. Lipids -- Chapter 24. Lipid Homeostasis -- Chapter 25. Protein Sparing by Lipids -- Chapter 26. Fatty Acids -- Chapter 27. Essential Fatty Acids -- Chapter 28. Biosynthesis of Polyunsaturated Fatty Acids -- Chapter 29. PUFAs in Reproduction and Behavior -- Chapter 30. Trophic Transfer of PUFAs -- Chapter 31. Sterols, Phospholipids, Wax Esters -- Chapter 32. Vitamin A -- Chapter 33. Vitamin B -- Chapter 34. Vitamin C -- Chapter 35. Vitamin D -- Chapter 36. Vitamin E -- Chapter 37. Vitamin K -- Chapter 38. Nucleotides -- Chapter 39. Exogenous Enzymes -- Chapter 40. Intraspecific Variability.

Background: Methods and approaches that can be used in food and nutrition research are changing at a faster pace than ever. Whereas animal methods are mostly known for their use in food safety analysis (see Part I), they also play in important role in proof-of-concept and mechanistic studies of products, as well as studying potency, efficacy, and tolerance of foods and food ingredients. Members of the International Life Sciences Institute (ILSI) Europe have formed an expert group to review possibilities, opportunities, and challenges for the potential use of alternative testing strategies in nutrition research and regulatory requirements, supporting the 3Rs principle of Replacement, Reduction, Refinement of animal research, which can ultimately be used in support of regulatory submissions for pre-market authorisation. Scope and approach: For the different areas of food for specific groups and health claims, the acceptability of nonanimal approaches is evaluated in comparison to legislative requirements in Europe. The alternative approaches considered cover emerging tools and methodologies such as organoids, organs-on-a-chip or human in vitro gastrointestinal simulators. Conclusions: In nutrition research, there has been a long tradition of following a certain experimental trajectory for grounding scientific hypotheses starting from in vitro data moving on to in vivo verification in a preferred animal model and finally proving this in a human setting. From a regulatory perspective there is no specific requirement for animal experimentation that justifies the use of the majority of animal experiments in the assessment of nutritional content and value of food products. However, animal data are mostly considered as the standard, and guidance for alternative approaches that would be accepted is lacking. It is therefore important to further build evidence and offer validation for the adequacy of already existing in vitro tools to ensure their suitability for substantiating dose levels and further planning clinical ...

This paper reviews current knowledge on two feedstuffs, that is, insect meal and fish by-products, as alternatives to conventional animal protein sources. After an introductory part that highlights the need for sustainable development of animal production, the alternative protein sources are discussed. In particular, after providing some indications on their production and supply focussing on EU, a SWOT (Strengths, Weaknesses, Opportunities, and Threats) analysis was performed to identify the key factors that could help or impair the development of both protein sources production sectors. Finally, future perspectives are presented. The use of processed animal proteins derived from insects in farmed fish feeding is recognised by the EU legislation that authorises the use of proteins from seven insect species and the allowed substrates to rear insects. Insects have several advantages in nutritional value and the amino acid composition of their proteins generally meet animal requirements for good growth and health. The SWOT analysis indicated that insect meals can be considered as feed functional ingredients with beneficial properties that depend on the insect species, rearing system adopted, and the substrate used for their growth. Insects are expected to be increasingly used as a replacement for conventional animal-derived proteins, especially in aquafeeds. In the section regarding fishery and aquaculture by-products, the potential use of raw materials obtained during seafood processing is discussed. Peptides and amino acids recovered from as hydrolysed proteins can be used in animal feeds to partially substitute conventional protein feedstuffs thus providing nutrients, bioactive compounds and feed additives for animals. The SWOT analysis identified opportunities and weaknesses. Both the alternative protein sources are promising alternative feed ingredients for livestock production.

The electronic nose is an instrument that comprises an array of electronic chemical sensors and an appropriate pattern recognition system and capable of recognizing simple or complex volatile organic compounds' (VOCs) profiles associated to a product odour. The e-nose analysis of VOCs is of increasing interest as an analytical tool in many research areas, such as agricultural, food, pharmaceutical, biomedical, cosmetics, environmental, food, manufacturing, military. In the food industry, the electronic nose could represent a rapid and reliable tool for quality and safety assessment, freshness and shelf-life evaluation, authenticity assessment, foodstuff recognition, and process monitoring. This paper provides an overview of the applications of electronic nose in feed analysis and animal nutrition. Focus is placed on the applications as an analytical tool for quality control and management in the cereal and pet food industry. Further, this paper provides a critical outlook on the developments needed for transitioning of electronic nose use from research to industrial application in real contexts.

Throughout the ages the quest for food and drink has influenced humanity's economic, social and political development, and played a role in the organization of society and history. Nutrition (or what we choose to consume) influences the health of human beings and therefore their quality of life. Animal source foods are often the dietary component that evokes the widest array of complex scientific, economic, environmental and political issues. It is viewed as the most expensive component of any diet, yet can make significant contributions to human health through providing high quantities of essential nutrients. In addition to quantity, the high quality of the nutrients in animal source foods is important as high-quality nutrients are more readily absorbed into the human body than lower-quality nutrients from other food and non-food sources. As South Africans increasingly suffer the consequences of inappropriate diets (over- and under- nutrition), the role of animal source foods as part of a healthy diet requires continuous investment in research and extrapolation of information towards appropriate guidelines and recommendations. Although it is often suggested that the intake of animal source foods should be limited because of possible linkages between animal product consumption and health, scientific evidence increasingly indicates the beneficial role that animal source foods can play in preventing and combating obesity and certain non-communicable diseases related to over-nutrition. This article aims to describe the nutritional role of animal source foods as part of a healthy South African diet and presents a review of recent findings related to their nutrient contribution, as well as evidence relating to common health concerns. ; http://www.sasas.co.za ; am2014

1. Nutrient supply to the newborn ruminant -- 2. Energy nutrition of rumen micro-organisms -- 3. Manipulation of rumen fermentation and associative effects -- 4. Host animal control of microbial fermentation and host animal digestion -- 5. Absorption of nutrients -- 6. Energy metabolism of the host animal -- 7. Utilization of the energy of absorbed nutrients -- 8. Feed quality and feed intake -- 9. Feed evaluation, past and present -- 10. Towards future feed evaluation systems.

Unlike with conventional pig breeds, knowledge on growth and performance, and even more so on nutritional requirements, is very limited for local breeds. Using a modelling approach based on a growth model and data from literature or experiments from H2020 European Union project TREASURE, we determined the growth characteristics and nutritional requirements of nine local breeds (Alentejana, Basque, Bísara, Apulo Calabrese, Cinta Senese, Iberian, Krškopolje pig, Mangalitsa, and Moravka). Our results confirmed the lower growth potential of local pig breeds compared to conventional pig breeds. Moreover, a larger proportion of ingested and retained energy is dedicated to lipid deposition in local pig breeds, explaining the higher fat composition of the carcasses of these breeds. Our study provided initial insights into the nutritional requirements (such as amino-acids) of local pig breeds, providing a first step towards defining feeding strategies better adapted to the characteristics of these breeds.