Embryonic development, hatching time and newborn juveniles of Octopus tehuelchus under two culture temperatures

The development of cephalopods early life stages is strongly influenced by environmental variables, especially temperature. Octopus tehuelchus (d'Orbigny, 1834) an Atlantic Patagonian fishery resource currently being studied as a new species for cultivation; however it not known how temperature modulates its stages. In this work, egg masses were artificially incubated at 13 and 16 °C under controlled aquarium conditions. each thermal treatment, the embryonic development, embryo morphometry survival throughout embryogenesis, well embryogenesis duration recorded. After hatching, morphological description juveniles was achieved time in starvation calculated both temperatures. At mean 85 days shorter than °C. For treatments, highest mortalities occurred up to beginning organogenesis, no significant differences hatching success observed. also showed potential increase or decrease juvenile performance post period. This resulted reduction size weight born but average increment 7 their when compared octopus reared chromatophore pattern similar treatments characteristic species. observed seem show adaptive mechanisms that optimize embryos viability different temperatures can be found northern coast. From practical point view, our findings are important define biological parameters associated procedures cultivation O. tehuelchus.