archipelago. Arquiptlago. Life and Marine Sciences. Supplement 2 (Part B): 83-

Important reproduction aspects of six demersal species from Azores were studied: red (blackspot) seabream (Pagellus bogaraveo), bluemouth (Helicolenus daclylopterus), two alfonsinos (Beryx splendens and Beryx decadac~lus), yellow-orange scorpionfish (Pontinus kuhlii) and silver scabbardfish (Lepidopus caudatus). Sex ratios were calculated and tested by chi-square analysis. In order to determine the size at first maturity, maturation ogives were estimated using Logistic or Gompertz models. The gonadosomatic index was determined for those species for which the reproductive period was not well known. The ratio of males to females was significantly different (p<0.05) from 1:l for all species: P. bogaraveo (1:0.20), H. dactylopterus (1:0.86), B. splendens (1:1.25), B. decadactylus (1: 1.38), P. kuhlii ( l : 1.75) and L. calrdatus (1: 1.74). Length and corresponding age (years