Within recent years, demand as well as supply of products to replace meat, so called meat alternatives, have increased. For future products, new plant-based protein sources are of high interest. Protein from pea and especially from algae provide huge potential for human nutrition as well as for the environment. To provide insight on consumers' opinions on the development of new meat alternatives, this study investigated consumers' opinions of pea and algae burgers compared to the traditional beef burger in terms of taste, health, and environmental friendliness. It has also explored the influence of factors such as meat commitment, food neophobia, and the attitude towards vegetarians and vegans; it has then compared the findings between three European countries with different culinary backgrounds. The online survey was conducted with meat-eating participants from Germany (N=567), France (N=605), and the United Kingdom (N=562). Participants in all three countries expected pea and algae burgers to be less tasty, but healthier and more environmentally friendly compared to the beef burger. Expectations of taste, health, and environmental friendliness of pea and algae burgers were negatively influenced by higher levels of meat commitment, more negative attitudes towards vegetarian and vegan lifestyles, and higher food neophobia. Although the attitudes towards vegetarian lifestyles were generally negative, pea and algae emerged as promising protein sources because of their favorable health and environmental friendliness expectations. Nevertheless, negative taste expectations and attitudes towards meat-free diets remain a challenge for the adoption of more plant-based diets.

Performance, meat quality and litter quality were determined in 4000 male and female Ross 308 broilers fed on starter diet (soybean meal or rapeseed meal and peas) and grower-finisher diets based on either soybean meal (control) or substituting rapeseed meal or rapeseed meal and pea in different proportions (100/0%, 75/25% or 50/50%) for soybean meal in iso-nitrogenous basis. Performance of the birds fed with soybean meal diets was superior compared to that of the birds fed with rapeseed meal and pea based diets. Bird performance was the poorest and mortality the highest for the birds fed with the rapeseed meal grower diet. In this experiment birds did not reach performance target for the age and strain of bird. Overall, diet based solely on rapeseed meal protein is not suitable for broiler production. However, dietary rapeseed meal inclusion clearly improved fatty acid profile of breast meat. The omega-6/omega-3-ratio was 4.1, 2.4 and 2.7 for soybean meal, rapeseed meal, and rapeseed meal and peas based diets, respectively. There were no differences in sensory quality evaluation of breast meat between the treatments.