Leo J.W., 1992. The effect of feeding carp (Cyprinus carpio L.) fry with pellets of varying protein content. Acta Ichthyol. Piscat. 22 (1): 63-73.

The influence of pellets containing 10%, 20%, 30% and 40% protein content on morphometric parameters of carp fry was investigated. A highly significant correlation between protein content and increase in body weight, head weight, body length was found. A significant correlation was recorded for weight of trunk and entrails, length of head and intestine, body thickness and maximum body height. No significant correlation was found for the Fulton nutrition factor, the dorsal index (according to Kiselev), body circumference, percentage of protein and fat in flesh.