Effects of temperature experienced during embryonic development on biomass and C and N composition at hatching in Palaemon serratus (Pennant, 1777)

Jean‐baptiste Baudet (1) , Benoît Xuereb (1) , Michael Danger (2) , Vincent Felten (2) , Aurélie Duflot (1) , Emeline Maniez (1) , Frank Le Foll (1) , Romain Coulaud (1)

1 SEBIO - Stress Environnementaux et BIOsurveillance des milieux aquatiques
2 LIEC - Laboratoire Interdisciplinaire des Environnements Continentaux

In decapod crustaceans, the conditions experienced during embryonic develop-ment trigger phenotypic plasticity of the larvae at hatching. The objective of this study was to test the effects of temperature during embryonic development of Palaemon serratus on the phenotypic plasticity of hatching larvae. We incubated egg- bearing females from eggs laying to hatching at four temperatures (10, 15, 18 and 20°C). Weight, carbon and nitrogen contents were measured on newly laid eggs and on freshly hatched larvae. The duration of embryonic development was negatively correlated with incubation temperature. At 20°C, all females aban-doned their eggs during development. Incubation temperature had no effect on the weight and the percentage of N of the larvae at hatching, while it did affect their percentage of C and their C/N ratio. Embryos incubated at 10°C seemed to produce larvae with fewer lipid reserves than those incubated at 15 and 18°C. They probably overconsumed their lipid reserves to compensate for the metabolic losses due to the low temperature. These results provide information on the link between maternal investment per egg and larval development in P. serratus.

Mots clés: C/N, decapod, eggs, larvae, phenotypic plasticity

Domaines: Sciences du Vivant [q-bio]

Jean‐baptiste Baudet, Benoît Xuereb, Michael Danger, Vincent Felten, Aurélie Duflot, et al.. Effects of temperature experienced during embryonic development on biomass and C and N composition at hatching in Palaemon serratus (Pennant, 1777). Acta Zoologica, 2023, ⟨10.1111/azo.12461⟩. ⟨hal-04027028⟩