Temperature-mediated plasticity in the development of Palaemon serratus larvae from winter and summer laying

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Répercussions des dommages à l’ADN spermatique sur le développement embryo-larvaire chez la crevette bouquet, Palaemon serratus

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Influence of temperature and diet qualityon larval performance of Palaemon serratus

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Temperature-mediated developmental plasticity in winter and summer larvae of Palaemon serratus

International audienceThis is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain

Effets de la disponibilité alimentaire et de la température sur la plasticité du développement larvaire et leurs conséquences sur la fitness des juvéniles chez Palaemon serratus

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

International audienceIn 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

Effects of temperature on the performance of Palaemon serratus (Pennant, 1777) larvae from winter and summer laying

International audienceIn the common prawn, Palaemon serratus (Pennant, 1777), the females release larvae twice a year (winter andsummer layings). We investigated seasonal differences in larval phenotypes and their consequences on larvalperformance. We measured the biomass and carbon (C) and nitrogen (N) content (proxy of lipid and proteinreserves) at hatching of larvae laid by 6 winter and 6 summer females collected on the coast of Seine-Maritime(France). We incubated these larvae at 3 temperatures (12, 16, and 20 ◦C) and quantified the effects of tem-perature and season on survival, development time, biomass, and C and N content and ratio at metamorphosis. At hatching, winter larvae were larger than summer larvae, but their C/N was similar. Development time increased with decreasing temperature, with no seasonal difference. Within the same clutch, the longer the development time, the greater the weight of the larvae, without affecting their C/N ratio. Seasonal differences in maternal per offspring investment were not as pronounced as expected. Surprisingly, the summer larvae survived and grew better than the winter ones, at least at 16 and 20 ◦C

Combined effects of temperature and diet on the performance of larvae produced by young and old Palaemon serratus females

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