Lethal CO2effects during long-term exposure are also
poorly known.Fivelstad et al.[1999] reported 5 and 8%
mortality at the end of 62 day exposure to 5 and 9 torr,
respectively for freshwater Atlantic salmon (Salmo salar)
smolts, while 1 and 5% mortalities were found for seawater
postsmolts of the same species at 12 and 20 torr after
43 days [Fivelstad et al., 1998]. Smart et al.[1979] found
little difference in mortality for freshwater rainbow trout,
Oncorhynchus mykiss, reared for 275 days at PCO2of 4 to
17 torr. No mortality occurred by 10 week exposure of
juvenile spotted wolf fish,Anarhichas minor,toPCO2of up
to 20 torr [Foss et al., 2003]. Life-long CO2 exposure
experiments have not been conducted nor is there any
information on effects of CO2
exposure over generations.
Assessing long-term effects is of utmost importance because
the fate of a population depends on how the population