The impact of carbon dioxide on freshwater fish behaviors

Freshwater environments have the potential to be impacted by acidification due to increases in dissolved carbon dioxide (CO2). Recent work in the marine environment suggests that increased CO2 levels due to climate change can negatively affect a fish’s ability to detect predators, home to natal environments, and perform aerobically. The potential for elevated CO2 to have similar negative impacts on freshwater communities remains understudied. The objective of our study was to quantify the effects of elevated CO2 on the behaviors of fathead minnows (Pimephales promelas) and silver carp (Hypophthalmichthys molitrix) following exposure to conspecific skin extracts (alarm cues). In fathead minnows, their response to conspecific skin extracts were significantly impaired following exposure to elevated CO2 levels for at least 96 h, while silver carp behaviors were unaltered. However, fathead minnow behaviors did return to pre-CO2 exposure in high CO2 exposed fish following 14 d of holding at ambient CO2 levels. Overall, this study suggests there may be potential impacts to freshwater fishes alarm cue behaviors following CO2 exposure but these responses may be species-specific, and will likely be abated should the CO2 stressor be removed.

Name thesis:degree_name

M.S.

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Natural Res & Env Sciences

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2016

Author dc:creator

• Tix, John Anthony

Contributors dc:contributor

• Suski, Cory D.

• Asian carp
• climate change
• fish
• carbon dioxide
• recovery

Statement dc:rights

• Copyright 2016 John Tix

Language dc:language

en

Handle dc:identifier

http://hdl.handle.net/2142/90789

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/90789