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The coast of Caiçara do Norte – RN is a known elasmobranchs nursery area, where the stingray Dasyatis guttata females and males of different sizes are captured. Since the species biological informations are scarce, the present study aimed to investigate the reproductive biology, the diet and the age and growth patterns of D. guttata in this area. Juvenile stingrays, including newborns, were more frequent in the catches. Dasyatis guttata reproduces throughout the year, but showed higher reproductive activity in the dry season. The LD50 estimated for females was 51.3 cm and for males was 43.5 cm. Regarding the diet, results characterized D. guttata as a generalist predator, that feeds upon the prey more available in the environment, and indicated that there are no significant differences between the diet composition of males and females, and between seasons of the year. However, an ontogenetic change was found, with the young feeding preferentially on crustaceans and the adults on bivalve molluscs. The species presented also a slow growth rate for both genders and it is suggested that the deposition of periodic growth marks occur once a year. The growth curve was fitted and the estimated growth parameters were: L∞ = 100.76 cm; k = 0.07; t0 = -2.18 for males; and L∞ = 137.57 cm; k = 0.06; t0 = -1.86 for females. Males and females achieve the maturity at about five years old.

Reprodução, alimentação, idade e crescimento de Dasyatis guttata (Bloch &amp; Schneider, 1801) (Elasmobranchii; Dasyatidae) na região de Caiçara do Norte - RN