Abstract

LAGOS, L; URIARTE, I; YANY, G  and  ASTORGA, M. Effect of temperature on the culture of larvae of the bivalve Mytilus chilensis originated from broodstocks from different latitudes in a controlled environment. Cienc. mar [online]. 2012, vol.38, n.3, pp.543-550. ISSN 0185-3880.  https://doi.org/10.7773/cm.v38i3.2081.

D-veliger larvae from Mytilus chilensis broodstocks from natural banks of Punta Arenas and Chiloé (Chile) were grown at 9 ± 0.5 °C and 15 ± 0.5 °C to compare results under two culture temperatures. During this experiment, larvae were fed Isochrysis galbana (clone T-ISO). The larvae were grouped into four groups depending on origin of broodstock and the culture temperature. The growth rate was statistically higher in the group from Punta Arenas at 15 °C, while settlement length was smaller in the group from Chiloé at 9 °C. In both cases, the remaining groups did not differ significantly. Settlement survival showed no significant differences between populations and temperatures. Both populations showed a better use of accumulated thermal units (°C day^-1) during growth at 9 °C than at 15 °C. Despite the genetic differentiation of the Punta Arenas population, the productive outcome of M. chilensis larvae from broodstocks from different latitudes is similar.

Keywords : mussels; larvae; survival; growth; temperature.

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