On the biology and fishery of Aristeus antennatus (Risso, 1816), (Decapoda, Dendrobranchiata) in the Ibiza Channel (Balearic Islands, Spain)

摘要: This study presents data on the biology and fishery of Aristeus antennatus in Ibiza Channel, obtained from monthly samples carried out commercial catches landed port Santa Pola during 1992, 1993 1994. The estimations undertaken von Bertalanffy Growth Model (VBGF) parameters gave high K values, indicating that males would reach 23 mm CL first year females 29 CL, which represent a maximum life expectancy three four years, respectively. reproduction period, based percentages maturation, fecundity spawning activity, was defined as starting at end spring lasting through summer, with greatest intensity months June to September. sizes maturity (L50) 18.1 for 21.9 females, indicated maturation have take place within life. total annual landings whole zone fluctuated around an average 76 t per year. mean catch unit effort (CPUE), expressed kilograms shrimp by boat fishing day, 29.12 kg/boat/day. values biomass, yields mortalities LCA VPA showed stock slightly overexploited, although resource able cope variations hardly altering. demonstrated rate biomass production (Turnover), mortality vector having greater effect older age classes, especially females. fact could be due not being equally accessible, since exploitation largest sizes, predominated.