BISC 313 Lecture Notes - Lecture 11: Sockeye Salmon, Imidacloprid, Clothianidin

• School: Simon Fraser University
• Department: Department of Humanities Biological Sciences
• Course: BISC 313
• Professor: Vicki Marlatt

Document Summary

Canadian water quality guideline for the protec1on of aqua1c life (ccme) = 0. 23 g/l. Governments are recently developed methods and measuring concentra1ons in canadian environment. Fisheries and oceans canada article: low level chronic exposure to wild salmon. Sockeye salmon < = 150 ug/l not lethal. Lots of fertilized embryos and then monitored the growth of sockeye salmon to 3. 5 exposure period (fry stage) No effects of length, weight, etc from these imidacloprid treatments. Similar study with clothianidin concentration with testosterone & estradiol tested. Testosterone and estradiol is for reproduction & growth. Fall 2020: estrogen receptor alpha increased, gonad differentiation, development, no direct effect on mortality or body size. Effect of waterborne clothianidin on sockeye salmon hepatic glucocorticoid receptor 2 gene expression after clothianidin exposures initiatives 1 hr post-fertilization to the swim-up fry developmental stage. Important for stress response -> important for fight or flight (escape predators, etc)