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- W2796404300 abstract "Abstract In female Octopus maya the reproductive success has well-defined thermal limits; beyond which, spawning, number of eggs, fecundity, and the viability of the embryos are reduced. Observations of wild male O. maya suggest that temperatures below 27°C favour their reproductive performance. From these observations we hypothesize that, as in females, the temperature modulates the reproductive performance of adult O. maya males. The study was directed to evaluate the physiological condition, reproductive success, and histological damage in testis of male O. maya exposed to thermal stress, to determine the implications of ocean warming over their reproductive performance. High temperatures (28-30°C) negatively affect the growth and health of male O. maya. In octopuses maintained at 30°C, as a consequence of the thermal stress we observed an increment in the haemocytes number, a reduction in the oxygen consumption rate, and an inflammatory process in the testis. The number of spermatozoa per spermatophore was not affected by temperature, but higher spermatophores production was observed at 30°C. The paternity analysis showed that the offspring had multiple paternity with an average of 10 males contributing in a single spawn. The paternal contribution was affected by temperature with high, medium, or no paternal contribution in animals maintained at 24°C (control group), 28°C, and 30°C, respectively. The temperatures from 28°C to 30°C deeply affected the reproductive performance of Octopus maya males." @default.
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- W2796404300 date "2018-02-18" @default.
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- W2796404300 title "Effects of chronic thermal stress on the reproductive performance of male Octopus maya" @default.
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- W2796404300 doi "https://doi.org/10.1101/267476" @default.
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