Anti-oxidant defence mechanisms and oxidant damage indicators measured in adults of Octopus maya exposed at optimal (24°C) and high (30°C) temperatures

There is the raw data of the evaluations of effects of temperature on males and females of Octopus maya acclimated for 30 d at 24 and 30°C. Data here are: 1. Routine metabolic rates measured in open respirometers during 24h, (RMR24h), without values, used to LMR data 2. The low oxygen consumption data (LMR) obtained from 20% lower quartile data distribution of the RMR 24h 3. High metabolic rate (HMR) measured in animals exposed to 35°C for 5 min in an intermittent respirometer. 4. Values of Q10 calculated with LMR, RMR 24h and HMR data 5. Data of activities of Catalase (CAT), superoxide dismutase (SOD), total glutathione (GSH), lipoperoxidation (LPO), Carbonylation (PO), total protein, acetyl-cholinesterase (AChE), and carboxylesterase (CbE) of hearts and muscle of males and females of O. maya. Abstract Since thermal stress enhances the energy demands, it is possible to hypothesize that the harmful effects of high temperatures observed in cephalopods are the result of the limited capacity of adults to channel more energy than those that the reproductive activity demands. In this sense, the present study was designed to know how thermal stress modulates the energy physiology of Octopus maya adults, evaluated through the relationship between temperature, respiratory metabolism (measured as thermal metabolic scope: TMS), antioxidant defence mechanisms (ANTIOX) and oxidant damage indicators (ODI). Sixty-seven males and females of O. maya were individually distributed in two different temperatures of 24, and 30°C. TMS resulted lower in females and males acclimated to 30°C than in animals maintained at 24°C. At the same time, higher values of ANTIOX and ODI were registered in the branchial hearts than in muscle arms and both octopus males and females acclimated at 30 than 24°C. Octopus Carboxyl-esterase (CbE) and acetylcholinesterase (AChE) were not affected by the acclimation temperature and by sex; however higher values in the branchial hearts than the muscle of those enzymes were observed. Results obtained in the present study demonstrated in adults of O. maya that 30°C is a temperature where animals are in a limit of energy production, probably as a result of the incapacity of animals to transport oxygen to mitochondria. Although the animals are adapted to satisfy their basic energy requirements at 30 °C, it is not enough to cover all the demands energy needed of reproduction. At 30°C, oxidative stress is present explaining the reduction in the production of eggs, viable sperm and therefore in the quality of the progeny