versión On-line ISSN 0717-7178
DUPRE M., Enrique. Reproduction, molt and development of the spiny lobster of Juan Fernandez, Jasus frontalis, in laboratory conditions. Investig. mar. [online]. 2000, vol.28, pp. 165-174. ISSN 0717-7178. http://dx.doi.org/10.4067/S0717-71782000002800012.
In the present study the molting period, mating, egg carrying, phyllosome eclosion and duration of larval development of the spiny lobster Jasus frontalis were determined at different temperatures. All the observations were carried out using sexually mature individuals in 2000 l (molting period), and 50 l ( larval eclosion and development) seawater tanks. Larval development was also observed in vitro in one-liter glass beakers. It was found that males and females did not molt within the same time periods. Males molted between February and March every year when the temperature reached 17.0 ± 0.5ºC or 16.9 ± 0.4ºC. Females molted from the middle of April to the middle of June when temperatures varied between 15 ± 0.5ºC and 13.1 ± 0.2ºC. Growth at each molt was 1.3 to 3.6 mm in both males and females, and hardening of the new carapace occurred within three days. Initiation of the egg carrying (berried) stage occurred between June and August, and eclosion of larvae between October and December of each year. Embryonic development lasted 115 ± 3 days at 13ºC and 78 ± 9 days at 18ºC. In all cases observed, eclosion occurred after sunset and prior to midnight. The female participates actively in liberation of the naupliosome larvae, which swim actively for 10-20 minutes, after which they molt and become the first phyllosome larvae
Palabras clave : reproductive cycle; molt; hatching; larval development; Jasus frontalis.