Which risk to fish increases as ambient temperature rises while oxygen levels are already low?

💡 Explanation

As temperature increases, the solubility of oxygen decreases and fish metabolic rate increases; countercurrent exchange in gills becomes less efficient because of reduced oxygen gradient, exacerbating hypoxia. Therefore reduced oxygen uptake results, rather than increased osmoregulatory cost, parasite increase, or digestive difficulty, which are less directly linked to gill function.

• Which risk significantly increases in deep-sea fish during rapid ascent due to swim bladder volume changes?
• Which metabolic shift occurs when photorespiration dominates within a plant mesophyll cell?
• During nocturnal migration, which navigational error occurs when celestial cues become unreliable?
• Which consequence occurs when root endodermal cells fail?
• Which outcome prevents complete wing transformation during a partial insect metamorphosis?
• Which outcome occurs when a dragonfly nymph loses limbs affecting cells?