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Current estimates predict that due to population growth by 2050, the world will need about 70% more food than is currently being produced. With the growth of the population whose diet also requires protein intake, livestock production will continue to grow, and proteins of animal origin will remain an important part of the population’s diet. The production of proteins of animal origin will increase in the future mainly due to the increased production of pork and poultry meat. Therefore, the demand for protein in feed will increase, as pigs and poultry have a greater need for protein in feed compared to ruminants. Therefore, the needs and challenges for nowadays are to find those sources of protein that will satisfy the nutritional needs of the largest part of the population and animals, and for which production will be cheaper and more accessible than for the sources of protein that are currently used in human and animal nutrition. To date, several new sources of protein for human and animal nutrition are already in use, and their importance will be even greater in the future. Insects, proteins from single-celled organisms and algae are increasingly used as alternative protein supplements. In addition, microbial technology and biological fermentation can improve the digestibility and, thus, the utility value of protein supplements.

In the Serbian market, fish is available from aquaculture (such as carp and trout) and from fishing (commercial and recreational catch). In the past ten years, from 2012 to 2021, there has been a decrease in the production of carp due to reduced farming areas, but trout production has increased. On average, during this period, aquaculture production yielded approximately 5,491 tons of carp and 2,977 tons of trout, while the fish catch averaged around 2,979 tons. The yield per hectare in carp ponds was 800 kg, while in trout ponds, it was 20 kg per square meter. As the demand for fish exceeds the domestic supply, the market is supplemented with imported fish.

The use of meat in traditional Serbian cuisine can be divided into three periods. The first period is the time from the arrival of Slavs in the Balkans, through the Middle Ages to the early 19 th century. The second period, the 19 th and the first half of the 20 th centuries, can be marked as special due to significant changes that impacted traditional Serbian cuisine, compared to the first period. It was a period during which the Europeanization of Serbia took place in all spheres of life, including cuisine. After World War II, Serbia and many surrounding countries eperienced a great surge in industrialization in all economic fields, including that of food production. The last sixty years has seen the globalization of our food supply, with food being transported globally from one part of the world to another, and which resulted in neglected traditional, local cuisines. Therefore, many countries, including Serbia, recognize a need for preserving traditional cuisine. This recognition has initiated several mechanisms for maintaining Europe's gastronomic herit-age. Preservation of traditional cuisine in Serbia has special significance for tourism development.

The objective of this study was to determine the effect of breed line and age on carcass chemical composition in broiler chickens. Chemical composition of broiler breast meat and drumstick with thigh were compared within3 lines (Cobb, Ross, and Hubbard). Each line was divided into two groups, aged 42 and 50 days. Chemical composition of meat was determined 48 hours after slaughter and was very variable depending on the breed and age of the broilers. The most significant differences were observed in fat content. Breast meat and meat from drumstick with thigh of younger broilers (42 days old) had significantly lower fat content than older broilers (50 days old). Cobb broilers, 42 days old, had significantly lower percentages of fat (p lt 0.01) in breast meat and meat from drumsticks with thighs than other broiler lines of the same age, while 50 day old Hubbard broilers had lower fat levels in breast meat and meat from drumsticks with thighs than meat from the other two broiler provenances (Cobb or Ross) of the same age. Hubbard broilers (42 days old) had significantly lower (p lt 0.01) levels of water and protein in breast meat and meat from drumsticks with thighs compared to the other broiler lines. Interactions between breed line and age were found for fat percentage in breast meat and meat from drumsticks with thighs. Meat quality of broilers of different provenances can be estimated by determining the chemical composition of breast meat and meat from drumsticks with thighs.

The aim of this study was to determine the slaughter weight, hot carcass weight, cold carcass weight, dressing percentage, chilling loss, forequarter weight, hindquarter weight and participation of forequarters and hindquarters of the beef cattle breeds Simmental (males, females and cattle from repurchase) and Holstein Friesian. A total of 100 animals were studied. After slaughter, carcass parameters were measured individually. The results show that the Holstein Friesian cattle had a significantly lower (p lt 0.01) average slaughter weight, hot carcass weight, cold carcass weight and dressing percentage than Simmental beef cattle. Also, females had a significantly lower average cold carcass weight than males (p lt 0.05). Male Simmental beef cattle had significantly higher (p lt 0.01) average forequarter and hindquarter weights than female Simmental beef cattle and Holstein Friesian cattle.