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MEPS 646:93-107 (2020)  -  DOI:

Combined effects of temperature and hypoxia shape female brooding behaviors and the early ontogeny of the Chilean kelp crab Taliepus dentatus

Simone Baldanzi1,2,*, Daniela Storch3, Marco Fusi4, Nicolas Weidberg2,5, Alexandra Tissot2, Sergio A. Navarrete2,6, Miriam Fernández2

1Facultad de Ciencia del Mar y de Recursos Naturales, Universidad de Valparaíso, Av. Borgoño 16344, Viña del Mar 2520000, Chile
2Estación Costera de Investigaciones Marinas (ECIM), Pontificia Universidad Católica de Chile, Av. Bernardo O’Higgins 340, Santiago 2690000, Chile
3Integrative Ecophysiology, Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Am Handelshafen 12, 27570 Bremerhaven, Germany
4School of Applied Sciences, Edinburgh Napier University, Edinburgh EH11 4BN, UK
5Department of Arctic Marine Biology, Faculty of Biosciences, Fisheries and Economics, University of Tromsø, Muninbakken 21, 9019 Tromsø, Norway
6Center for Applied Ecology and Sustainability (CAPES), LINCGlobal, Pontificia Universidad Católica de Chile, Santiago 8331150, Chile
*Corresponding author:

ABSTRACT: The ecophysiology of marine ectotherms is regulated by the interaction of temperature with environmental drivers, such as dissolved oxygen (DO). The combination of low levels of DO and temperature in the ocean affects physiological and behavioral responses, especially in early life history traits of marine species. Here, we aimed to investigate the combined effect of ecologically relevant values of temperature and DO on female brooding behavior as well as on the early ontogeny of the Chilean kelp crab Taliepus dentatus. In a laboratory experiment, after acclimation and mating of females and males in constant temperatures (11 or 14°C), we exposed brooding females to 1 of 2 temperatures (11 or 14°C) and 1 of 2 DO levels (normoxia or cycling hypoxia). We tested the effects of these 4 treatments on embryo and larval sizes, embryo developmental time, female brooding behavior (i.e. embryo ventilation), larval hatching (i.e. number of hatched larvae), Zoea 1 survival to starvation, and swimming speed. We found a negative effect of temperature on the size of early embryos, but no interactions were detected in embryo size during development. High temperature and low DO increased female brooding behavior and larval size, reduced the number of hatched larvae, and affected larval swimming speed. Embryo development time and larval survival were negatively affected by temperature. These results suggest that an increasing frequency of hypoxic events, combined with ocean warming, might have important consequences on marine invertebrate brooders, affecting female fecundity, larval performance and, potentially, their dispersal ability even well within their optimal thermal range.

KEY WORDS: Environmental drivers · Egg size · Larval size · Offspring size-performance relationship · Larval swimming speed · Brachyuran crabs · Life history traits

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Cite this article as: Baldanzi S, Storch D, Fusi M, Weidberg N, Tissot A, Navarrete SA, Fernández M (2020) Combined effects of temperature and hypoxia shape female brooding behaviors and the early ontogeny of the Chilean kelp crab Taliepus dentatus. Mar Ecol Prog Ser 646:93-107.

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