Effect of salinity and temperature on the acute and chronic toxicity of arsenic to the marine rotifers Proales similis and Brachionus ibericus
Por:
Rebolledo, Uriel Arreguin, Nandini, S., Sarma, S. S. S., Escobar-Sanchez, Ofelia
Publicada:
1 ago 2020
Resumen:
Several abiotic factors influence the ecological responses of aquatic
invertebrates to metal toxicity. We examined the effect of salinity (10,
20, and 30 psu) and temperature (25 and 32 degrees C) on acute and
chronic arsenic (As) toxicity to the euryhaline rotifers, Proales
similis and Brachionus ibericus. In general, higher salinities and low
temperature resulted in lower arsenic toxicity. The population growth
studies indicated that P. similis was more sensitive than B. ibericus to
As. Arsenic toxicity intensified the vulnerability of P. similis to B.
ibericus competition. Life table parameters decreased with increasing As
levels in the medium. Chronic toxicity bioassays were more sensitive
than acute toxicity tests for determining the adverse effect of As to
rotifers. Our findings provide useful insights on the effect of arsenic
on rotifer populations exposed to different temperature and salinity
scenarios. Proales similis could be an important complement to
brachionid rotifers for marine toxicity bioassays.
Filiaciones:
Rebolledo, Uriel Arreguin:
Univ Autonoma Sinaloa, Fac Ciencias Mar, Ciencias Recursos Acuat, Mazatlan 82000, Sinaloa, Mexico
Nandini, S.:
(Corresponding Author), Univ Nacl Autonoma Mexico, Div Invest & Posgrad, Lab Zool Acuat, Campus Iztacala,Av Barrios 1, Tlalnepantla 54090, Estado De Mexic, Mexico
Univ Nacl Autonoma Mexico, Div Invest & Posgrad, Lab Zool Acuat, Campus Iztacala,Av Barrios 1, Tlalnepantla 54090, Estado De Mexic, Mexico
Sarma, S. S. S.:
Univ Nacl Autonoma Mexico, Div Invest & Posgrad, Lab Zool Acuat, Campus Iztacala,Av Barrios 1, Tlalnepantla 54090, Estado De Mexic, Mexico
Escobar-Sanchez, Ofelia:
CONACYT, Direcc Catedras CONACYT, Av Insurgentes Sur 1582, Del Benito Juarez 03940, Cdmx, Mexico
Univ Autonoma Sinaloa, Fac Ciencias Mar, Mazatlan 82000, Sinaloa, Mexico
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