پردیس کشاورزی و منابع طبیعی دانشگاه تهران Iranian Journal of animal Science 2008-4773 52 3 2021 11 22 Effect of feed form and stock density on performance assessed and some behavioral ‎parameters assessed by image processing, in broiler chickens Effect of feed form and stock density on performance assessed and some behavioral ‎parameters assessed by image processing, in broiler chickens 141 152 84913 10.22059/ijas.2021.318838.653814 FA Farshid Jamalpor M.Sc. Graduate, Department of Animal Science, Agricultural Sciences and Natural Resources University of ‎Khuzestan, Mollasani, Iran, P.O. Box: 6341773637‎ Somayyeh Salari Associate Professor, Department of Animal Science, Agricultural Sciences and Natural Resources University of Khuzestan, ‎Mollasani, Iran, P.O. Box: 6341773637‎ 0000-0003-2202-2633 Saman Abdanan Mehdizadeh Asisstant Professor, Department of Biosystem Sciences, Agricultural Sciences and Natural Resources University of Khuzestan, ‎Mollasani, Iran Journal Article 2021 02 23 This experiment was conducted to evaluate effect of feed form and stocking density on performance and some behavioral parameters of 208 one-day-old broiler chickens (Ross 308), for 42 days.  Treatments were 2 feed forms (pellet <em>versus</em> mash) and 2 levels of density (10 and 16 birds/m²) that was performed in completely randomized design with 2×2 factorial arrangement and 4 replicates. Performance parameters were recorded weekly and carcass characteristics measured on day 42 of age. For evaluating behavioral parameters, 8 cameras were used. The results showed that feed intake, body weight gain and feed conversion ratio were improved in broilers fed pellet diets compared to the birds fed mash diets at whole period of experiment (P<0.05). Abdominal fat was increased in birds that consumed mash diet in high stocking density (P<0.05). In the morning of the third week, the activity index of birds that consumed mash diet in high stocking density increased significantly (P<0.05). The results of this study indicate that feed form could not affect performance and behavioral parameters of broilers in high stocking density, although, pelleting diets improved performance parameters and high stock density increased average around feeder activity of broiler chickens. This experiment was conducted to evaluate effect of feed form and stocking density on performance and some behavioral parameters of 208 one-day-old broiler chickens (Ross 308), for 42 days.  Treatments were 2 feed forms (pellet <em>versus</em> mash) and 2 levels of density (10 and 16 birds/m²) that was performed in completely randomized design with 2×2 factorial arrangement and 4 replicates. Performance parameters were recorded weekly and carcass characteristics measured on day 42 of age. For evaluating behavioral parameters, 8 cameras were used. The results showed that feed intake, body weight gain and feed conversion ratio were improved in broilers fed pellet diets compared to the birds fed mash diets at whole period of experiment (P<0.05). Abdominal fat was increased in birds that consumed mash diet in high stocking density (P<0.05). In the morning of the third week, the activity index of birds that consumed mash diet in high stocking density increased significantly (P<0.05). The results of this study indicate that feed form could not affect performance and behavioral parameters of broilers in high stocking density, although, pelleting diets improved performance parameters and high stock density increased average around feeder activity of broiler chickens. https://ijas.ut.ac.ir/article_84913_15fef3221d2f218785adee089c17fd28.pdf