Praxis 5511 Practice Question
Various species of fish have different oxygen requirements for survival. The solubility of oxygen in water decreases as temperature rises. Based on the table and graph shown, which of the following species requires the highest concentration of dissolved oxygen for survival?
Correct Answer: D
Rationale: Trout are known to thrive in cooler, oxygen-rich waters, making them highly dependent on dissolved oxygen for survival. They typically require higher concentrations compared to other species.
Catfish (A) and carp (B) are more adaptable to varying oxygen levels and can survive in warmer waters with lower oxygen concentrations. Herring (C), while also requiring oxygen, generally inhabit marine environments where oxygen levels can fluctuate but are not as stringent as those for trout. Thus, trout's specific habitat and physiological needs necessitate the highest concentration of dissolved oxygen among the options provided.
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