Spawning induction and embryonic development of the clam Ameghinomya antiqua (King, 1832)

Artificial cultivation increases clams' availability and is an alternative to the extraction from natural banks. The culture of clams requires species-specific research in different growth stages, studies on effects interactions parameters are essential obtain control proper development larvae. This paper aims compare methods induce spawning, describe embryonic development, effect densities yield "D" larvae "taca" clam Ameghinomya antiqua. Breeders were collected southwest coast Quinchao Island, Chiloé, Chile. Spawning induction assays performed comparing combinations biological physical factors. Experiments density obtention performed, was described at 11 ± 1°C. spawning inductions successfully achieved with addition food combined temperature changes, resulting liberation oocytes a jelly coat diameter 140 μm. Trochophore observed 40 h post-fertilization. percentage embryos developed showed significant differences when testing cultures 20, 40, 60 mL-1. 20 mL-1 ones that obtained greater number (50%). These results suggest changes describes technology for first time.