Early life stages of Northern shrimp (Pandalus borealis) are sensitive to fish feed containing the anti-parasitic drug diflubenzuron.

Autor: Bechmann RK; International Research Institute of Stavanger (IRIS), Mekjarvik 12, 4070, Randaberg, Norway. Electronic address: rkb@iris.no., Lyng E; International Research Institute of Stavanger (IRIS), Mekjarvik 12, 4070, Randaberg, Norway. Electronic address: ely@iris.no., Westerlund S; International Research Institute of Stavanger (IRIS), Mekjarvik 12, 4070, Randaberg, Norway. Electronic address: sw@iris.no., Bamber S; International Research Institute of Stavanger (IRIS), Mekjarvik 12, 4070, Randaberg, Norway. Electronic address: sba@iris.no., Berry M; International Research Institute of Stavanger (IRIS), Mekjarvik 12, 4070, Randaberg, Norway. Electronic address: mabe@iris.no., Arnberg M; International Research Institute of Stavanger (IRIS), Mekjarvik 12, 4070, Randaberg, Norway. Electronic address: mar@iris.no., Kringstad A; The Norwegian Institute for Water Research (NIVA), Gaustadalléen 21, NO-0349 Oslo, Norway. Electronic address: alfhild.kringstad@niva.no., Calosi P; Université du Québec à Rimouski, Département de Biologie, Chimie et Géographie, Campus de Rimouski, 300, Allée des Ursulines, Rimouski, Québec, G5L 3A1, Canada. Electronic address: Piero_Calosi@uqar.ca., Seear PJ; Department of Genetics, College of Medicine, Biological Sciences and Psychology, University of Leicester, University Road, LE1 7RH, Leicester, UK. Electronic address: ps255@leicester.ac.uk.
Jazyk: angličtina
Zdroj: Aquatic toxicology (Amsterdam, Netherlands) [Aquat Toxicol] 2018 May; Vol. 198, pp. 82-91. Date of Electronic Publication: 2018 Feb 28.
DOI: 10.1016/j.aquatox.2018.02.021
Abstrakt: Increasing use of fish feed containing the chitin synthesis inhibiting anti-parasitic drug diflubenzuron (DFB) in salmon aquaculture has raised concerns over its impact on coastal ecosystems. Larvae of Northern shrimp (Pandalus borealis) were exposed to DFB medicated feed under Control conditions (7.0 °C, pH 8.0) and under Ocean Acidification and Warming conditions (OAW, 9.5 °C and pH 7.6). Two weeks' exposure to DFB medicated feed caused significantly increased mortality. The effect of OAW and DFB on mortality of shrimp larvae was additive; 10% mortality in Control, 35% in OAW, 66% in DFB and 92% in OAW + DFB. In OAW + DFB feeding and swimming activity were reduced for stage II larvae and none of the surviving larvae developed to stage IV. Two genes involved in feeding (GAPDH and PRLP) and one gene involved in moulting (DD9B) were significantly downregulated in larvae exposed to OAW + DFB relative to the Control. Due to a shorter intermoult period under OAW conditions, the OAW + DFB larvae were exposed throughout two instead of one critical pre-moult period. This may explain the more serious sub-lethal effects for OAW + DFB than DFB larvae. A single day exposure at 4 days after hatching did not affect DFB larvae, but high mortality was observed for OAW + DFB larvae, possibly because they were exposed closer to moulting. High mortality of shrimp larvae exposed to DFB medicated feed, indicates that the use of DFB in salmon aquaculture is a threat to crustacean zooplankton.
(Copyright © 2018 The Authors. Published by Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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