What structure allows the walleye eyes to enhance vision effectively in low-light conditions?
Answer
Tapetum lucidum
The remarkable ability of the walleye to hunt effectively during dawn, dusk, or in murky waters stems from a specialized anatomical feature in its eyes known as the tapetum lucidum. This reflective layer behind the retina captures and reflects incoming light back across the photoreceptor cells. This process effectively doubles the light exposure the rods and cones receive, significantly improving visual acuity when ambient light levels are low. This adaptation is crucial, as it dictates that the fish will seek deeper water or cover during bright, clear afternoons to avoid excessive light stimulation.
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