New strategies for building and managing sustainable fish pond systems

Nouvelles stratégies de construction et de conduite de système de production en étang pour une pisciculture durable

Joël Aubin (1) , Marielle Thomas (2) , Thomas Lecocq (2) , Joël Robin (3, 4) , Aurélien Tocqueville (5) , Jésabel Laithier (5) , Alexandrine Pannard (6, 7) , Julie Coudreuse (8) , Marc Roucaute (1) , Christophe Jaeger (1) , Aurélie Wilfart (1) , Latourre Quentin (1) , Marie Maillot (1) , Michael S. Corson (1) , Cyprien Dupont (4, 3) , Léo Girard (3, 4)

1 SAS - Sol Agro et hydrosystème Spatialisation
2 URAFPA - Unité de Recherches Animal et Fonctionnalités des Produits Animaux
3 AGE - Agroécologie et Environnement
4 Isara
5 ITAVI
6 ECOBIO - Ecosystèmes, biodiversité, évolution [Rennes]
7 Département des Sciences Biologiques [Montréal]
8 ESE - Écologie et santé des écosystèmes

The SEPURE project, funded by FEAMP, aims to recommend new stocking practices to meet fish farmers' expectations, and to better understand the relationships between management practices, biodiversity and ES. It brings together scientists from different backgrounds (agronomy, ecology, biology, modeling, environmental sciences) to link farmers' practices, economic and environmental performance and pond response by monitoring water quality, phytoplankton, zooplankton, benthic macroinvertebrates, aquatic macrophytes and fish communities. After gathering available data on fish populations and fishing, a survey was carried out and meetings held with fish farmers in three emblematic pond areas in France: Dombes, Lorraine and Brenne-Sologne. Based on an analysis of the context and producers' expectations, stocking scenarios were drawn up. On 10 production sites, fish farmers applied these scenarios, and practices and ecosystems were monitored. The performance of experiments carried out in 2021 is currently being analyzed, and a second year of experiments has begun in 2022. Eleven scenarios with different species mixes were co-designed with fish farmers. They took into account numerous parameters, such as the complementarity of species based on their trophic and behavioral traits (Lecocq et al., 2019), water availability, summer water temperature, the existence of local and national markets, the presence of submerged vegetation, pond depth, feeding and liming practices and the use of ponds for other activities (e.g. hunting). Thus, stocking scenarios were diversified and covered several objectives, such as maximizing carp production, increasing profitability, allowing aquatic plants to develop to increase habitat availability for wildlife, and applying Chinese food web concepts. The new data generated by the SEPURE project should help support decision-making for the future development of the pond sector and help maintain this economic activity in the territories.

ritoires.

Keywords: Etangs; polyculture; Poisson; Biodiversité

Domains: Life Sciences [q-bio]

Joël Aubin, Marielle Thomas, Thomas Lecocq, Joël Robin, Aurélien Tocqueville, et al.. Nouvelles stratégies de construction et de conduite de système de production en étang pour une pisciculture durable. Journées de la recherche piscicole française, Jul 2022, Paris, France. 2022. ⟨hal-04114144⟩