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Idesia (Arica)

versión On-line ISSN 0718-3429

Resumen

MORAGA C, Paola; AVILA P, Roberto  y  VILAXA O, Arnaldo. Salinity and temperature optimum for oviparous reproduction and development of Artemia franciscana. Idesia [online]. 2015, vol.33, n.1, pp.85-92. ISSN 0718-3429.  http://dx.doi.org/10.4067/S0718-34292015000100009.

Artemia franciscana is one of the most used for food crop species in living organisms, because it has a number proteins and unsaturated fatty acids that play a key role in various metabolic functions of cultured species. This species corresponds to a small crustacean branquiópodo, non-selective filter, typical of aquatic habitats of high salinity. In adulthood, they can be bisexual and parthenogenetic species, females in both populations may result two types of reproduction, and ovoviviparous resulting in a fully formed nauplii may result; resulting in an oviparous and cysts that can provide an immediate explosion or enter diapause or cryptobiotic state for long periods of time, facilitating the production of nauplii throughout the year. In order to set the variables ofsalinity and optimum temperaturefor oviparous and subsequent development ofArtemiafranciscana in northern Chile, an experimental crop breeding adults, who underwent nine treatments with three replicates were performed, to different ranges of salinity (100 g/L, 120 g/L and 140 g/L) and temperature (20 °C, 25 °C and 30 °C), where the cysts obtained were collected daily and stored for two weeks and then determining their quality and based on the percentage hatching efficiency and applied to the analysis of data from two-way variance (ANOVA) to establish significant differences between treatments. The test results established that there is significant difference between the experimental temperature and salinity because salinity separately only has an effect on reproduction. Is underlined that adequate physicochemical parameters for oviparous A. franciscana is 120 g/L at 25 °C because it presents a significant difference at p < 0.054 level.

Palabras clave : Artemia; cystos; criptobyiosis; oviparous reproduction.

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