PURPOSE: Fish farming in barrage pond is a rearing system commonly used worldwide. Obtaining good water quality is essential to improve sustainability of these ecosystems, both for health of fish consumers and environmental considerations. However, ponds are often located in agricultural landscape, but few study reports impact of pesticide pressure on these ecosystems. This study characterizes five sites in Northeastern France. This work establishes an initial framework for pesticide monitoring with the aim to improve understanding of the fate of pesticides in ponds. METHODS: This framework is based on surveys indicating managements and Geographical Information System (GIS) for five ponds and their watersheds (sites: C-0, C-25, C-45, C-75 and C-85) and completes with some analysis of a large spectrum of pesticide residues in surface waters. RESULTS: Watersheds show a gradient of crop proportion ranging from 0% to 82% of the watershed area, mainly rapeseed, wheat, barley and maize. Ponds were representative of local Northeastern France management. Many pesticides, and also nutrients, were measured in water with concentrations varying between sites and seasons. The sum of quantified molecules ranged from 0.17 μg/l for site C-0 (March) to 8.81 μg/l for site C-25 (October). Concentrations of metaldehyde, quinmerac, isoproturon and bentazon were sometimes above 1 μg/l. CONCLUSIONS: There is a strong connection between pond and watershed, due to water supply throughout the fish production cycle. Sites with small pond/big watershed are the most exposed to acute contamination a few days after spraying because water discharges are not diluted.
PURPOSE: Fish farming in barrage pond is a rearing system commonly used worldwide. Obtaining good water quality is essential to improve sustainability of these ecosystems, both for health of fish consumers and environmental considerations. However, ponds are often located in agricultural landscape, but few study reports impact of pesticide pressure on these ecosystems. This study characterizes five sites in Northeastern France. This work establishes an initial framework for pesticide monitoring with the aim to improve understanding of the fate of pesticides in ponds. METHODS: This framework is based on surveys indicating managements and Geographical Information System (GIS) for five ponds and their watersheds (sites: C-0, C-25, C-45, C-75 and C-85) and completes with some analysis of a large spectrum of pesticide residues in surface waters. RESULTS: Watersheds show a gradient of crop proportion ranging from 0% to 82% of the watershed area, mainly rapeseed, wheat, barley and maize. Ponds were representative of local Northeastern France management. Many pesticides, and also nutrients, were measured in water with concentrations varying between sites and seasons. The sum of quantified molecules ranged from 0.17 μg/l for site C-0 (March) to 8.81 μg/l for site C-25 (October). Concentrations of metaldehyde, quinmerac, isoproturon and bentazon were sometimes above 1 μg/l. CONCLUSIONS: There is a strong connection between pond and watershed, due to water supply throughout the fish production cycle. Sites with small pond/big watershed are the most exposed to acute contamination a few days after spraying because water discharges are not diluted.
Authors: René P Schwarzenbach; Beate I Escher; Kathrin Fenner; Thomas B Hofstetter; C Annette Johnson; Urs von Gunten; Bernhard Wehrli Journal: Science Date: 2006-08-25 Impact factor: 47.728
Authors: Damien A Devault; Magali Gérino; Christophe Laplanche; Frédéric Julien; Peter Winterton; Georges Merlina; François Delmas; Puy Lim; José Miguel Sánchez-Pérez; Eric Pinelli Journal: Sci Total Environ Date: 2009-02-01 Impact factor: 7.963
Authors: John Bostock; Brendan McAndrew; Randolph Richards; Kim Jauncey; Trevor Telfer; Kai Lorenzen; David Little; Lindsay Ross; Neil Handisyde; Iain Gatward; Richard Corner Journal: Philos Trans R Soc Lond B Biol Sci Date: 2010-09-27 Impact factor: 6.237