[Coral-List] Anyone have any information regarding effects of nanomaterials on corals?

[Seyed Ali Johari]

Dear List members

Anyone have any information regarding effects of nanomaterials on corals?

Here is a new paper published with online Open Access in Iranian Journal of
Fisheries Sciences.

Title: *Toxicity comparison of colloidal silver nanoparticles in various
life stages of rainbow trout (Oncorhynchus
mykiss)<http://www.jifro.ir/browse.php?a_id=873&slc_lang=en&sid=1&ftxt=1>
*

Abstract: Recognizing the significance of the life stage of fish for
nano-eco-toxicological studies, the acute toxicity of colloidal silver
nanoparticles (AgNPs) was tested in three different life stages of rainbow
trout. Fishes were exposed to colloidal AgNPs at nominal concentrations of
100, 32, 10, 3.2, 1, 0.32, 0.1, and 0.032 mg/L. The estimated 96 hr LC50
values were 0.25, 0.71, and 2.16 mg/L for the eleutheroembryos, larvae and
juveniles, respectively, revealing a higher sensitivity for the early life
stages. In addition, a dose-dependent blood plasma reduction of chloride
and potassium, also increase of cortisol and cholinesterase were observed
in the juveniles to exposed AgNPs when compared to the controls. Thus,
colloidal AgNPs should be classified as “very toxic” and “toxic” to the
eleutheroembryo-larva and juvenile stages, respectively, meaning that the
release of nanosilver into the aquatic environment or its direct
application as an antimicrobial agent in aquaculture should no longer be
allowed.

Kine Regards
Ali