Estimation of size at onset of sexual maturity and growth parameters in Norway lobster (Nephrops norvegicus) off the Portuguese coast

Abstract

The aim of the study was to analyse the size, growth and size at maturity of Nephrops norvegicus in two areas off the Portuguese coast. Samples were collected between September 2006 and January 2007. A total of 2081 individuals ranging between 25 and 88mm carapace length were collected, measured and sexed. The estimated growth parameters were L∞=88.33mm CL, k=0.38years-1 for males and L∞=64.45mm CL, k=0.38years-1 for females in the northern area, and L∞=94.86mm CL, k=0.41years-1 for males and L∞=69.20mm CL, k=0.44years-1 for females in the central area. Size at maturity was 50.7mm CL in the northern area and 46.9mm CL in the central area. © 2010 Elsevier B.V.