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Table 1.

Calculated sensitivity and percent photon capture at the sensitivity maximum of Row 3 ommatidial tiers in Pullosquilla litoralis from different light treatments

Full-spectrum, high-intensity treatment
Narrow-spectrum, reduced-intensity treatment
Receptor classSensitivity λ max (nm)% Photons absorbedSensitivity λ max (nm)% Photons absorbedRatio Deep:shallow
Row 3 distal tier 630 0.4 610 1.5 3.75 
Row 3 proximal tier 635 1.0 615 2.9 2.90 
Full-spectrum, high-intensity treatment
Narrow-spectrum, reduced-intensity treatment
Receptor classSensitivity λ max (nm)% Photons absorbedSensitivity λ max (nm)% Photons absorbedRatio Deep:shallow
Row 3 distal tier 630 0.4 610 1.5 3.75 
Row 3 proximal tier 635 1.0 615 2.9 2.90 

Calculations for percentage photons absorbed combine spectral data at depths of 1 m and 20 m with spectral sensitivity functions for each of the photoreceptors in Row 3. Ratios presented in the last column are the quotient of percentage photons absorbed by a deep-adapted Row 3 receptor by percentage photons absorbed in a shallow-adapted Row 3 receptor of the same tier.

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