In recent years, various studies have been carried out with O. maya with the purpose of evaluating thermal preferences by exposing juvenile and adult octopuses to multiple temperatures and experimental tests to know the thermal resistance and determine physiological events.
In the present study, the consequences of the exposure of adult female octopus to high temperatures on the physiological state of juveniles maintained in different thermal regimes were evaluated. Juveniles from stressed (30ºC) and unstressed (24ºC) females were kept at 25°C and 30ºC for a period of 20 to 30 days. To which the routine oxygen consumption and the maximum activity metabolism, the activity of the antioxidant defense mechanisms (ANTIOX) and some indicators of the damage produced by free radicals (ROS) were measured. It was observed that octopuses from stressed females kept at 30ºC were unable to survive for more than 15 days. In contrast, the octopuses from unstressed females kept at 30ºC for up to 20 days showed an ability, although limited, to regulate the presence of (ROS).
Growth Coefficient (CDC): In experiment 1, temperature did not affect growth. However, there is a tendency to obtain higher growth in specimens exposed to 25°C. In contrast, in experiment 2 it was observed that temperature exerted a significant effect on growth (P <0.05) with values 3.1 times higher in the specimens exposed to 30°C compared to 25°C.
In evaluations of oxygen consumption for both juveniles from stressed and non-stressed females, the specimens exposed to 30°C had an oxygen consumption that increased with exposure time, while oxygen consumption was maintained at 25°C constant.
In the octopuses kept at 30°C in experiment 1, it was identified that after 15 days of exposure, the enzymes of the antioxidant system collapsed, allowing the accumulation of peroxidized lipids (LPO). In the octopuses subjected to 30°C of experiment 2, it could be seen that they were able to control (ROS) levels from the first day, managing to maintain this until day 12 of exposure. By day 20, a reduction in the activity of Superoxide dismutase (SOD) and Catalase (CAT) was observed, anticipating a progressive increase in Protein Carboxylation (PO) and peroxidized lipids (LPO).