Which outcome impairs tuna migration when thermal stratification occurs?

💡 Explanation

Inefficient oxygen extraction reduces migration capacity. The tuna's *countercurrent exchange* in gills becomes less effective due to decreased oxygen gradients; consequently, less oxygen is absorbed because the cooler water limits oxygen transfer, therefore reducing aerobic capacity rather than buoyancy, sensory input, or predator detection.

• Which disruption impairs wing development when imaginal discs fail to express the apterous gene?
• Which physiological response reduces energy expenditure during induced torpor in small mammals?
• Which aerodynamic consequence results from vultures utilizing thermal updrafts for soaring flight?
• Which mechanism causes a groundhog's body temperature to increase as it exits hibernation?
• Which consequence occurs when a bird experiences a rapid decrease in air density at high altitude relative to its standard flight envelope?
• Which aerodynamic effect relies on feather barbule microstructure during avian fight or flight?