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首页> 外文期刊>Marine Biology: International Journal on Life in Oceans and Coastal Waters >Maternal temperature stress modulates acclimation and thermal biology in Octopus maya (Cephalopoda: Octopodidae) juvenile progeny
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Maternal temperature stress modulates acclimation and thermal biology in Octopus maya (Cephalopoda: Octopodidae) juvenile progeny

机译：Maternal temperature stress modulates acclimation and thermal biology in Octopus maya (Cephalopoda: Octopodidae) juvenile progeny

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Abstract High temperatures alter the physiological condition of Octopus maya embryos, juveniles, and adults, and the time of exposure could have a key role in their thermal tolerance. The present study evaluates the effects of temperature and exposure time on octopus juveniles obtained from a thermally stressed female and a control female when exposed to optimal (25?°C) and high temperatures (30?°C) for 20 and 30?days, respectively. The results showed a transgenerational temperature effect that was expressed with low survival, depressed routine resting and high metabolic rates. Moreover, a collapse of antioxidant defense enzymes and high levels of oxidative damage products were detected in juveniles from thermally stressed females. Stress was lethal for animals acclimated at 30?°C, while the performance of juveniles acclimated at optimal temperature (25?°C) was conditioned by high oxidative stress levels and a reduction of the high metabolic rate (HMR) even after 30?days of experiment. In contrast, juveniles from the non-thermally stressed female had an optimal performance when acclimated at 25?°C but at 30?°C, they had a comparatively higher HMR during the first 8?days. These results suggest energy surplus in those animals to escape from warming scenarios before experiencing oxidative damage accumulation. Further studies should confirm if epigenetic alterations could be involved.

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