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Elevated carbon dioxide has the potential to impact alarm cue responses in some freshwater fishes
Ist Teil von
Aquatic ecology, 2017-03, Vol.51 (1), p.59-72
Ort / Verlag
Dordrecht: Springer Netherlands
Erscheinungsjahr
2017
Link zum Volltext
Quelle
SpringerLink Journals - AutoHoldings
Beschreibungen/Notizen
Freshwater fish behaviors have the potential to be impacted by acidification due to increases in dissolved carbon dioxide (CO
2
). Recent work in the marine environment suggests that increased CO
2
levels due to climate change can negatively affect fishes homing to natal environments, while also hindering their ability to detect predators and perform aerobically. The potential for elevated CO
2
to have similar negative impacts on freshwater communities remains understudied. The objective of our study was to quantify the effects of elevated CO
2
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 was significantly impaired following exposure to elevated CO
2
levels for at least 96 h, while silver carp behaviors were unaltered. However, fathead minnow behaviors did return to pre-CO
2
exposure in high-CO
2
-exposed fish following 14 days of holding at ambient CO
2
levels. Overall, this study suggests there may be potential impacts to freshwater fishes alarm cue behaviors following CO
2
exposure, but these responses may be species-specific and will likely be abated should the CO
2
stressor be removed.