Table 4. Swallowing time efficiency (in seconds) for two specimens of Proteus, while feeding on Troglocaris without rostra and with long undamaged rostra.

Time efficiency: mean ± SD (n)
	Shrimps with long undamaged rostra	Shrimps without rostra
Proteus 1	38.5 ± 12.8 (n = 6)	14.3 ± 12.6 (n = 6)
Proteus 2	10.3 ± 8.5 (n = 4)	9.3 ± 6.8 (n = 7)
Mean ± SD, mean ± standard deviation; n, number of eaten shrimps.