TY - JOUR
T1 - Comparative sensitivities of larval stages of the cane toad, Rhinella marina, and the striped marsh frog, Limnodynastes peronii, to atrazine
AU - Siddiqua, Khurshida Akter
AU - Alquezar, Ralph
AU - Wilson, Scott Paton
PY - 2013
Y1 - 2013
N2 - Variations in larval sensitivities to atrazine were determined in the Australian native striped marsh frog, Limnodynastes peronii, and the introduced cane toad, Rhinella marina. The static acute test design involved six nominal concentrations of atrazine, including control, solvent control, 3, 6, 12, and 24mgL-1. Gosner stages 22-23 as hatchlings, stages 25-26, 28-29, and 32-33 as premetamorphic, 36-37 as prometamorphic and 40-41 as metamorphic climax stages of cane toads and the first four sets of Gosner stages of striped marsh frogs were exposed to atrazine treatments for 96h. Results showed that late larval stages were more sensitive than early stages and different premetamorphic stages showed variations in sensitivities in both test species. The striped marsh frog showed a stronger concentration-and stage-dependent response and greater sensitivity to atrazine than the cane toad. In both experimental species, Gosner stages 28-29 showed better concentration-dependent increase in sensitivities to atrazine compared with other larval stages. It can be concluded that inter-and intra-species variations in sensitivities to atrazine may occur in Australian anurans and native species may show greater sensitivity to acute concentrations of atrazine than the introduced cane toad.
AB - Variations in larval sensitivities to atrazine were determined in the Australian native striped marsh frog, Limnodynastes peronii, and the introduced cane toad, Rhinella marina. The static acute test design involved six nominal concentrations of atrazine, including control, solvent control, 3, 6, 12, and 24mgL-1. Gosner stages 22-23 as hatchlings, stages 25-26, 28-29, and 32-33 as premetamorphic, 36-37 as prometamorphic and 40-41 as metamorphic climax stages of cane toads and the first four sets of Gosner stages of striped marsh frogs were exposed to atrazine treatments for 96h. Results showed that late larval stages were more sensitive than early stages and different premetamorphic stages showed variations in sensitivities in both test species. The striped marsh frog showed a stronger concentration-and stage-dependent response and greater sensitivity to atrazine than the cane toad. In both experimental species, Gosner stages 28-29 showed better concentration-dependent increase in sensitivities to atrazine compared with other larval stages. It can be concluded that inter-and intra-species variations in sensitivities to atrazine may occur in Australian anurans and native species may show greater sensitivity to acute concentrations of atrazine than the introduced cane toad.
KW - Australian anurans
KW - herbicide
KW - inter-and intra-species
KW - susceptibility
UR - http://www.scopus.com/inward/record.url?scp=84885967465&partnerID=8YFLogxK
U2 - 10.1071/ZO13001
DO - 10.1071/ZO13001
M3 - Article
AN - SCOPUS:84885967465
VL - 61
SP - 320
EP - 327
JO - Australian Journal of Zoology
JF - Australian Journal of Zoology
SN - 0004-959X
IS - 4
ER -