PROGRESS ON SEX PHEROMONE RESEARCH IN AQUATIC CRUSTACEANS:A REVIEW
Sex pheromones play an important role in the reproductive processes of crustaceans,including mate recognition and mate choice.The chemical characterization of sex pheromones is viewed as a major step in improving our understanding of chemical communication during the reproduction of crustaceans.Apart from the species whose mating rigidly follows molting,characterizing the sex pheromones of the species without a linkage between mating and molting may improve our understanding of sex pheromones of crustaceans.There are two types of sex pheromones in crustaceans,i.e.,distance(soluble)pheromone that acts over a distance to attract mating partners,and contact pheromone,an insoluble coating on the body surface.In recent years,three chemicals,i.e.,uridine-5'-tri-phosphate,uridine-5'-di-phosphate,and N-acetylglucos-amino-1,5-lactone were identified as candidate components of decapod crustacean distance sex pheromones.Some caridean shrimps use lipophilic cuticular hydrocarbons as contact pheromone.Although great advances have been made in understanding the function and characteristics of sex pheromones in crustaceans,the chemical identity of sex pheromones remains largely unknown.This paper is a brief review of the research advances in crustacean sex pheromones and the approaches used to identify distance sex pheromones,to provide fundamental information for further identification of sex pheromone in aquatic crustaceans.