Citation:Deepananda K.H.M.A., & D. Gajamange, W.A.J.P. De Silva, H.C.E. Wegiriya (2011). Acute toxicity of a glyphosate herbicide, Roundup, to two freshwater crustaceans. J. Natn. Sci. Foundation Sri Lanka, 39 (2): 169-173
Date:2011
Abstract:
The acute toxicity of a glyphosate herbicide
Roundup®, contaminating freshwater ecosystems in Sri Lanka
was investigated with two species of the most common
freshwater crustaceans: calanoid copepod (Phyllodiaptomus
annae Apstein) and decapod shrimp (Caridina nilotica P.
Roux). LC50 values in adult males were determined using
standard toxicity assays under static conditions. The 48h LC50
value for P. annae was estimated as 1.06 mg/L and the values
of 72 h and 96 h LC50 for C. nilotica were 107.53 and 60.97
mg/L, respectively. The present study reveals that Roundup®
may cause a significant impact on native non-target organisms.
Further studies are needed to establish the toxic effect of
Roundup® to the very important structural group in the aquatic
ecosystems in Sri Lanka.
