TY - JOUR
T1 - Effect of polycyclic aromatic hydrocarbons on the pallial fluid buffering capacity of the marine mussel, Mytilus galloprovincialis
AU - Guerra-Rivas, Graciela
AU - Gómez-Gutiérrez, Claudia M.
AU - Márquez-Rocha, Facundo J.
N1 - Funding Information:
This work was supported by a grant from UABC (Universidad Autonoma de Baja California) and CICESE (Centro de Investigacion Cientifica y de Estudios Superiores de Ensenada) and by a fellowship from CONACYT (Comision Nacional de Ciencia y Tecnologia) to Graciela Guerra Rivas. The authors are grateful to Oceanographer Luis Pamanes for supplying the organisms needed for this experiment.
PY - 2002
Y1 - 2002
N2 - Pallial fluid buffering capacity of the sea mussel Mytilus galloprovincialis was investigated to establish the potential of this biological parameter to serve as a biomarker. Four groups of 15 animals were used in a 72-h toxicity test. Group 1, the aerobic control group, was placed in a filtered aerated natural seawater aquarium. Groups 2-4 were subjected to hypoxic conditions by removal from water after animals were injected with a single dose of the following: group 2 (anaerobic control) was administered 10 μl of UV-treated filtered natural seawater; group 3 (anaerobic solvent control) was injected with 10 μl of acetonitrile and group 4 (PAH exposed group) with 10 μl of 2 mM anthracene. Pallial fluid was taken from all the animals following seawater immersion or air exposure. Pallial fluid from each individual was extracted, adjusted to pH 5.0 and titrated with NaOH until reaching pH 6.0. The buffering capacity index (β), defined as the amount of μequivalents of NaOH needed to change in one unit the pH of a 5-ml sample of pallial fluid, was calculated for each group. Values were: for group 1, β=3.17 (±0.782); for group 2, β=15.713 (±2.992); group 3 was β=18.124 (±2.288); and group 4 was β=28.109 (±11.398). The statistically significant increase (P<0.05) in group 4 compared with the other groups indicates that the buffering capacity index (β) is a worthy biological parameter to be further explored as a biomarker for ecotoxicological monitoring programs. The increase in buffering capacity is discussed and a biochemical link between anaerobic metabolism and the exposure to PAH is suggested to explain changes of this biological parameter.
AB - Pallial fluid buffering capacity of the sea mussel Mytilus galloprovincialis was investigated to establish the potential of this biological parameter to serve as a biomarker. Four groups of 15 animals were used in a 72-h toxicity test. Group 1, the aerobic control group, was placed in a filtered aerated natural seawater aquarium. Groups 2-4 were subjected to hypoxic conditions by removal from water after animals were injected with a single dose of the following: group 2 (anaerobic control) was administered 10 μl of UV-treated filtered natural seawater; group 3 (anaerobic solvent control) was injected with 10 μl of acetonitrile and group 4 (PAH exposed group) with 10 μl of 2 mM anthracene. Pallial fluid was taken from all the animals following seawater immersion or air exposure. Pallial fluid from each individual was extracted, adjusted to pH 5.0 and titrated with NaOH until reaching pH 6.0. The buffering capacity index (β), defined as the amount of μequivalents of NaOH needed to change in one unit the pH of a 5-ml sample of pallial fluid, was calculated for each group. Values were: for group 1, β=3.17 (±0.782); for group 2, β=15.713 (±2.992); group 3 was β=18.124 (±2.288); and group 4 was β=28.109 (±11.398). The statistically significant increase (P<0.05) in group 4 compared with the other groups indicates that the buffering capacity index (β) is a worthy biological parameter to be further explored as a biomarker for ecotoxicological monitoring programs. The increase in buffering capacity is discussed and a biochemical link between anaerobic metabolism and the exposure to PAH is suggested to explain changes of this biological parameter.
KW - Anaerobic metabolism
KW - Biomarker
KW - Buffering capacity
KW - Hypoxic
KW - Mussel
KW - PAH
KW - Pallial fluid
KW - Succinate
UR - http://www.scopus.com/inward/record.url?scp=0035996835&partnerID=8YFLogxK
U2 - 10.1016/S1532-0456(02)00061-3
DO - 10.1016/S1532-0456(02)00061-3
M3 - Artículo
C2 - 12106894
AN - SCOPUS:0035996835
SN - 1532-0456
VL - 132
SP - 171
EP - 179
JO - Comparative Biochemistry and Physiology - C Toxicology and Pharmacology
JF - Comparative Biochemistry and Physiology - C Toxicology and Pharmacology
IS - 2
ER -