TY - JOUR
T1 - Oxidative stress response in an endangered goodeid fish (Girardinichthys viviparus) by exposure to water from its extant localities
AU - Vega-López, Armando
AU - Jiménez-Orozco, Fausto Alejandro
AU - García-Latorre, Ethel
AU - Domínguez-López, Maria Lilia
N1 - Funding Information:
We are grateful to SEMARNAT, Dirección General de Vida Silvestre, Mexico, for authorizing the collection of parent specimens. Our thanks also go to the staff of the “Lago de Texcoco” Project, CNA, for support in the field. This study was financed by the Instituto Politécnico Nacional, CGPI code 20041154. A. Vega-López, E. García-Latorre and M.L. Domínguez-López are fellows of EDI and COFFA IPN and SNI.
PY - 2008/9
Y1 - 2008/9
N2 - The oxidative stress response in Girardinichthys viviparus after exposure to water from its extant habitants was evaluated. The distribution range of this endangered species is currently restricted to a single lake, which receives domestic and industrial wastewater treated to a secondary level, but this is also contaminated with PCBs. Fish were exposed to water from Lake Texcoco, its extant habitat or another one, the Lake Zumpango proposed as a candidate to re-introduction. To predict the damage induced by sublethal increases in PCBs, assessment is also made of fish response to water from these localities enriched with PCB mixtures. Adult fish born in the laboratory were exposed to filtered surface water or to the PCB-enriched water for 1, 2, 4, 8 and 16 days. An assessment of the oxidative stress response in G. viviparus revealed four characteristic response patterns that were frequently observed: (1) increased lipid-peroxidation (LPOX), depressed SOD and increased CAT; (2) an increase in all three biomarkers; (3) reduced LPOX, unchanged SOD and increased CAT; (4) increased LPOX and depressed SOD and CAT. Our results demonstrate the complexity stress response of this endangered species while indicating that preventive measures are urgent to control the discharge of pro-oxidants in its environment.
AB - The oxidative stress response in Girardinichthys viviparus after exposure to water from its extant habitants was evaluated. The distribution range of this endangered species is currently restricted to a single lake, which receives domestic and industrial wastewater treated to a secondary level, but this is also contaminated with PCBs. Fish were exposed to water from Lake Texcoco, its extant habitat or another one, the Lake Zumpango proposed as a candidate to re-introduction. To predict the damage induced by sublethal increases in PCBs, assessment is also made of fish response to water from these localities enriched with PCB mixtures. Adult fish born in the laboratory were exposed to filtered surface water or to the PCB-enriched water for 1, 2, 4, 8 and 16 days. An assessment of the oxidative stress response in G. viviparus revealed four characteristic response patterns that were frequently observed: (1) increased lipid-peroxidation (LPOX), depressed SOD and increased CAT; (2) an increase in all three biomarkers; (3) reduced LPOX, unchanged SOD and increased CAT; (4) increased LPOX and depressed SOD and CAT. Our results demonstrate the complexity stress response of this endangered species while indicating that preventive measures are urgent to control the discharge of pro-oxidants in its environment.
KW - Catalase
KW - Endemic fish
KW - Lipid-peroxidation
KW - PCBs
KW - ROS
KW - SOD
KW - Sex-linked differences
UR - http://www.scopus.com/inward/record.url?scp=48349088743&partnerID=8YFLogxK
U2 - 10.1016/j.ecoenv.2007.10.031
DO - 10.1016/j.ecoenv.2007.10.031
M3 - Artículo
C2 - 18078994
SN - 0147-6513
VL - 71
SP - 94
EP - 103
JO - Ecotoxicology and Environmental Safety
JF - Ecotoxicology and Environmental Safety
IS - 1
ER -