Transcriptional responses in newly-hatched Japanese medaka (Oryzias latipes) associated with developmental malformations following diluted bitumen exposure

Effects of generations in captivity and elevated rearing temperature on Ontario hatchery brook trout (Salvelinus fontinalis) fry quality and survival

“…Increased metabolic activity is thought to be another factor in the reduction of survival as embryos experience an increased oxygen demand and production of waste products (Cingi et al, 2010). Increased metabolic wastes have also been linked to occurrences of blue sac disease (Madison et al, 2020), and could be another source of mortality for fish reared on elevated temperatures. Nonetheless, while warmer waters have been found to have lower levels of dissolved oxygen (Irby et al, 2018), this variable was controlled for in our study (maintained above 9mg L -1 across both treatments (Cook, Burness, et al, 2018)); and water changes occurred every day to minimize waste accumulation.…”

Effects of generations in captivity and elevated rearing temperature on Ontario hatchery brook trout (Salvelinus fontinalis) fry quality and survival

“…Increased metabolic activity is thought to be another factor in the reduction of survival as embryos experience an increased oxygen demand and production of waste products (Cingi et al, 2010). Increased metabolic wastes have also been linked to occurrences of blue sac disease (Madison et al, 2020), and could be another source of mortality for fish reared on elevated temperatures. Nonetheless, while warmer waters have been found to have lower levels of dissolved oxygen (Irby et al, 2018), this variable was controlled for in our study (maintained above 9mg L -1 across both treatments ); and water changes occurred every day to minimize waste accumulation.…”

“…Higher instances of this gametal fusion in highly domestic fishes suggest the need to investigate existing brood stocks still displaying these developmental malformations and determine if genetic, environmental, or GxE interactions are the most likely source (Christie et al, 2016). Finally, blue sac disease is a common phenomenon that occurs when fish experience a metabolic change in response to environmental conditions like elevated temperatures (Madison et al, 2020). Although its expression was not influenced by temperatures in our study, it is a known occurrence in Brook trout that has been found to have bacterial (Aeromonas hydrophila) and environmental causes such as crowding stress and nitrogenous wastes (Kayiş et al, 2015).…”

Bioaccumulation and toxicokinetics of polycyclic aromatic compounds and metals in giant floater mussels (Pyganodon grandis) exposed to a simulated diluted bitumen spill

“…The effects of metals associated with dilbit on aquatic species have only been assessed by two controlled laboratory experiments (Krohn et al, 2020;Robidoux et al, 2018), and all other dilbit and bitumen research reported PAH concentrations without data on metals (Alderman et al, 2017;Alsaadi et al, 2018;Barron et al, 2018;Charbonneau, 2016;Chow, 2016;Dew et al, 2015;Everitt, 2020;Madison et al, 2015Madison et al, , 2017Madison et al, , 2020McDonnell et al, 2019;Philibert et al, 2016;Sereneo, 2016). The study conducted by Krohn et al (2020) revealed elevated vanadium, molybdenum, and cadmium in wood frog tadpoles (Lithobates sylvaticus) exposed to naturally weathered dilbit, but not at levels expected to harm development.…”