Growth in the early stages of the curimba, Prochilodus lineatus through the analysis of scales and body size is provided. The emergence of the first scales and the formation of daily rings are related to the size and age of individuals. Scales were observed from the 20th day in individuals over 11.2 mm. An equation was obtained relating the number of daily rings of the scales, age of the individuals reared in captivity and the day of the year in which the fish was captured, leading to its approximate day of birth/hatching. Two phases of development with different growth rates were determined: the first comprising the period between the 1st and 18th day; the second between the 19th and the 70th day.
Prochilodus lineatus; daily rings growth; fish growth; rings in scales
