title: Effects of sublethal Zn++ and Cd ++ concentrations on filtration rate, absorption efficiency and scope for growth in Donax trunculus (Bivalvia; Donacidae).
abstract: Physiological parameters (filtration rate measured as clearance rate; absorption efficiency measured as Conover index) and energy balance [scope for growth (SFG)] where determined under Zn++ (essential metal) and Cd++ (nonessential metal) at different concentration levels and timing. The toxic effect observed on Donax trunculus was higher for Cd++ than for Zn++ in almost all the parameters studied. The SFG is proposed as an integrated environmental biomarker to be used like a tool with others from different organization levels to obtain a more comprehensive vision of the ecological consequences of pollutants.
authors.affiliation: Department of Biology of Organisms, Simón Bolívar University, Baruta. A.P. 89000, Caracas 1080, Venezuela. lyaneuberger@gmail.com
authors.forename: Lya
authors.initials: L
authors.lastname: Neuberger-Cywiak
authors.forename: Y
authors.initials: Y
authors.lastname: Achituv
authors.forename: E M
authors.initials: EM
authors.lastname: Garcia
mesh_terms: D000042:Absorption; D000818:Animals; D049872:Bivalvia / Q000502:physiology*; D003300:Copper / Q000633:toxicity*; D004305:Dose-Response Relationship, Drug; D004734:Energy Metabolism / Q000187:drug effects; D004784:Environmental Monitoring / Q000379:methods*; D005374:Filtration; D014874:Water Pollutants, Chemical / Q000633:toxicity*; D015032:Zinc / Q000633:toxicity*
chemical_list: D014874:Water Pollutants, Chemical; D003300:Copper; D015032:Zinc