Table 4 Predatory efficiency on mosquito A. stephensi by the teleost fish Gambusia affinis.

Treatment	Target	Day light time (n)	Night time (n)	Total predation nos	Percentage of predation
Standard conditions	I instar	174.0 ± 1.22^d	144.8 ± 2.68^cd	318.8	79.7^d
	II instar	158.8 ± 0.83^c	123.4 ± 1.51^c	282.2	70.55^c
	III instar	138.6 ± 0.54^b	112.4 ± 1.81^b	251.0	62.75^b
	IV instar	097.2 ± 2.04^a	088.0 ± 1.22^4a	185.2	46.3^a
Post-treatment with AgNPs	I instar	193.6 ± 1.14^d	183.0 ± 1.22	376.6	94.15^d
	II instar	172.6 ± 0.89^bc	164.6 ± 1.51^c	337.2	84.3^c
	III instar	155.8 ± 1.64^b	128.4 ± 0.89^b	284.2	71.05^b
	IV instar	122.6 ± 1.14^a	103.4 ± 1.51^a	226.0	56.5^a

Predation rates are represented by means ± SD of four replicates (1 fish vs 200 mosquitoes per replicate).
Control was clean water without predators within each column, means followed by the same letter are not.
Significantly different (P < 0.05).

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