Skip to main content
. 2014 Aug 6;9(8):e104213. doi: 10.1371/journal.pone.0104213

Table 4. Visual performance parameters summary.

Species S * (µm2 sr) ΣR (rods gc−1) SPR † (cycles deg−1) Nyquist frequency (cycles s−1)
Etmopterus lucifer 1.69 97.72 2.73 27.04
Etmopterus spinax 3.55 136.74 3.33±0.23 18.20
Etmopterus splendidus 1.40 84.22 2.22±0.05 25.53
Squaliolus aliae 2.09 76.31 1.81±0.37 26.65
Trigonognathus kabeyai ? 139.39 1.81 16.02

*These values are calculated for the specimen used in the histological analysis of photoreceptors (Table 1). ∑, summation ratio; N, sensitivity to bioluminescent point sources; S, optical sensitivity; SPR, spatial resolving power.