Protective effect of high alkalinity against the deleterious effects of chronic waterborne cadmium exposure on the detection of alarm cues by Juvenile Silver Catfish (Rhamdia quelen) Article

Kochhann, D, Benaduce, APS, Copatti, CE et al. (2009). Protective effect of high alkalinity against the deleterious effects of chronic waterborne cadmium exposure on the detection of alarm cues by Juvenile Silver Catfish (Rhamdia quelen) . ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY, 56(4), 770-775. 10.1007/s00244-009-9291-1

cited authors

  • Kochhann, D; Benaduce, APS; Copatti, CE; Lorenzatto, KR; Mesko, MF; Flores, EMM; Dressler, VL; Baldisserotto, B

authors

abstract

  • The objective of the present study was to analyze the effect of chronic cadmium (Cd) exposure at two alkalinity levels (63 and 92 mg l-1 CaCO3) on the antipredatory behavior of juvenile silver catfish (Rhamdia quelen) exposed to conspecific skin extract and predator odor. At an alkalinity of 63 mg l-1 CaCO3, 30 days of exposure to either 4.5 or 8.0 μg l-1 Cd impaired the catfish's antipredatory response to alarm cues. However, silver catfish exposed to 4.5 μg l -1 Cd at an alkalinity of 92 mg l-1 CaCO3 responded to skin extract and predator odor. In catfish exposed to 8.0 μg l-1 Cd at the same alkalinity, only the number of feeding bites decreased, and this occurred only for specimens exposed to predator odor. Our results show that higher alkalinity protected against the deleterious effects of Cd on alarm cue detection but only in the larvae exposed to the lowest waterborne Cd level. © 2009 Springer Science+Business Media, LLC.

publication date

  • May 1, 2009

published in

Digital Object Identifier (DOI)

start page

  • 770

end page

  • 775

volume

  • 56

issue

  • 4