Poster De Conférence Année : 2024

Combined effects of temperature and copper exposure to shrimp Palaemon serratus in the context of global change

Résumé

The shrimp Palaemon serratus is a high commercially value species fished by professional and recreative fishermen, and living among algae and on the rocky shores in Normandy, France. However, this species is affected by anthropic activities, and for two decades the populations show high fluctuations and tend to decrease, justifying the European Project GeDuBouq (2020-23). In the frame of this project, we investigated the effects of copper on shrimps brought to the lab and maintained at 3 temperatures: 15 versus 22 and 24°C. For 21 days, 8 shrimps were exposed to 3 concentrations plus control (10, 100 and 1000 µg L-1 of Cu; 12 conditions), and this experiment was duplicated (January and October 2022). Mortality, molting and behaviour (activity and localisation in aquaria, reaction to a stimulus and to food) were daily or every other day checked whereas other biomarkers were studied at T0 and after 21d: amount of glycogen in muscle, malondialdehyde (MDA) and proteins in the digestive gland and hemocyte phagocytic activity. The results showed that a concentration of 1000 µg L-1 of Cu was lethal, and that a high temperature accelerated mortality and the molting rate. Moreover, a high temperature significantly increased the shrimp activity and their ability to quickly react to stimulus and food while their behavioural responses were more variable according to copper concentrations. Temperature had very slight effects on the biochemical biomarkers by contrast to copper that led, for example, to a lower amount of MDA in the digestive gland and a stimulation of the phagocytic activity

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Dates et versions

hal-05590968 , version 1 (14-04-2026)

Identifiants

  • HAL Id : hal-05590968 , version 1

Citer

Katherine Costil, Claire Guegan, Christelle Caplat, Olivier Basuyaux, Antoine Serpentini. Combined effects of temperature and copper exposure to shrimp Palaemon serratus in the context of global change. Primo22, Pollutant Responses in Marine Organisms, May 2024, Nantes, France. ⟨hal-05590968⟩
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