Details

Autor(en) / Beteiligte

• Pan, Yihang K.
• Khursigara, Alexis J.
• Johansen, Jacob L.
• Esbaugh, Andrew J.

Titel

The effects of oil induced respiratory impairment on two indices of hypoxia tolerance in Atlantic croaker (Micropogonias undulatus)

Ist Teil von

• Chemosphere (Oxford), 2018-06, Vol.200, p.143-150

Ort / Verlag

England: Elsevier Ltd

Erscheinungsjahr

2018

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The Gulf of Mexico was home to the Deepwater Horizon oil spill, and is also known to exhibit seasonal declines in oxygen availability. Oil exposure in fish is known to impact oxygen uptake through cardiac impairment, which raises questions about the additive effects of these two stressors. Here we explore this question on the Atlantic croaker using two measures of hypoxia tolerance: critical oxygen threshold (Pcrit), and time to loss of equilibrium (LOE). We first demonstrated that 24 h exposure to 10.1 and 23.2 μg l−1 ΣPAH50 significantly impaired oxygen uptake. There was no effect of exposure on Pcrit or LOE. Exposure did result in significantly different repeatability between pre- and post-exposure Pcrit, suggesting that hypoxia tolerant individual may see greater impacts following exposure. These results suggest oil exposure does not have wide scale detrimental outcomes for hypoxia tolerance in fish, yet there may be fine scale impairments of ecological significance. •Oil exposure results in impaired maximum metabolic rate and aerobic scope.•The oil exposures do not cause an increase in critical oxygen threshold.•The oil exposures do not cause a decrease in time to loss of equilibrium.•Repeatability of critical oxygen threshold is affected by oil exposure.•Wide scale effects of oil exposure on hypoxia tolerance are not apparent.