Knowl. Manag. Aquat. Ecosyst.
Number 423, 2022
Climate change impact on freshwater communities and ecosystem functioning
|Number of page(s)||13|
|Published online||11 March 2022|
Effects of temperature on the survival and development of the early life stages of northern pike (Esox lucius)
University of Lorraine, UR AFPA, USC INRAE 340, Vandoeuvre-lès-Nancy, F-54506, France
2 CNRS (National Center for the Scientific Research − France)
* Corresponding author: email@example.com
Accepted: 15 February 2022
In the context of global change, the aim of this study was to investigate the effects of temperature on the survival rate and various variables (development time, morphometric measures, energy values) for both embryos and post-hatch stages until first food intake of northern pike (Esox lucius). We applied five constant temperatures (8, 10, 12, 14 and 16 °C) and their effects were analyzed during the entire endogenous feeding period at three stages: hatching, emergence and first food intake. Around 80,000 eggs from five females and five males were used. As expected, the development time was three times longer at 8 than at 16 °C. The survival rate of well-formed post-hatch stages at the end of the endogenous feeding period was similar between temperatures: 76% (10 °C), 73% (12 °C), 72% (14 °C), 72% (16 °C), except at 8 °C (70%). Also at 16 °C, post-hatch stages were larger and had the highest energy value when starting feeding exogenously. These results are in accordance with current models that predict an increase of the distribution area of northern pike in France in coming decades associated with climate change projections (1 to 5 °C increase by 2100 for France).
Key words: Global warming / endogenous feeding period / egg / post-hatch stage / energy value / northern pike
© E. Réalis-Doyelle et al., Published by EDP Sciences 2022
This is an Open Access article distributed under the terms of the Creative Commons Attribution License CC-BY-ND (https://creativecommons.org/licenses/by-nd/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. If you remix, transform, or build upon the material, you may not distribute the modified material.
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