Individual growth and mortality of Rhithropanopeus harrisii (Decapoda: Panopeidae) in the estuarine region of Patos Lagoon, Southern Brazil

Abstract The present investigation aimed to estimate the individual growth and mortality of an invasive species found in estuarine region Patos Lagoon (Southern Brazil). For 20 months crabs were sampled, laboratory specimens Rhithropanopeus harrisii (Gould, 1841) measured (carapace width, CW, weight). Carapace width data was utilized for a modal progression analysis curve (von Bertalanffy model), size-converted catch curve. Von parameters estimated CW∞ = 16.92 mm k 1.28 year-1. Maximum longevity at 3.5 years. Instantaneous total 2.17 ± 0.30 It has been suggested that may be explained by low predation impact on R. harrisii, which, as consequence, lead slow this Lagoon.