Plasma retinoids concentration in Leptodactylus chaquensis (Amphibia: Leptodactylidae) from rice agroecosystems, Santa Fe province, Argentina

TEGLIA C; ATADEMO A; PELTZER P; GOICOECHEA H C; LAJMANOVICH R

CHEMOSPHERE

PERGAMON-ELSEVIER SCIENCE LTD

Lugar: Amsterdam; Año: 2015 vol. 135 p. 24 - 30

0045-6535

Retinoids are known to regulate important processes such as differentiation, development, and embryogenesis. Furthermore, agricultural pesticides often have been cited as a factor affecting indigenous amphibian populations, but possible effects of pesticides and the other factors associated with agricultural practices are understood poorly. Retinoid acid (RA), 13?Cis?retinoic acid (13?Cis?RA), retinol (ROH) in a native frog, Leptodactylus chaquensis from rice field (RF) and non?contaminated area (reference site; RS) was measured. The relation retinoic acid vs. retinol (RA/ROH) and 13?Cis?retinoic acid vs. retinol (13?Cis?RA/ROH) was also explored. RA and 13?Cis?RA activities were higher (93.7 ± 8.6 and 131.7 ± 11.4 µg mL?1; respectively) for individuals collected from RF, than for those from RS (65.5 ± 8.6 and 92.2 ± 10.2 µg mL?1; respectively). ROH did not vary between treatment sites. The relation among RA/ROH and 13?Cis?RA/ROH was significantly higher in RF. Our results suggest that retinoid homeostasis in L. chaquensis may be influenced by factors associated with intensive agricultural practices. In addiction RA and 13?Cis?RA activities in plasma of L. chaquensis would be suitable biomarkers of pesticide exposure in field monitoring.