The Assessment of Different Dietary Selenium Resources on Reproductive Performance, Spawning Indicators, and Larval Production of Red Tilapia (Oreochromis mossambicus × O. niloticus) Broodfish

Table 5

Spawning performance of adult female red tilapia fish fed diets supplemented with various selenium sources over 25 weeks.

Measurements	Experimental groups				P Value
	CTR	Na2SeO3	NPSe	Na2SeO3 + NPSe
TSE/pond	16,092.3 ± 85.22^d	20,707 ± 67.61^c	22,572.7 ± 53.51^a	21,732.6 ± 24.43^b	<0.001
TSE/fish	2,641 ± 62.96^c	3,952.7 ± 61.06^a	3,878.3 ± 72.29^b	3,848.7 ± 79.05^b	<0.001
Relative fecundity^a	7.0 ± 0.01	6.9 ± 0.02	7.0 ± 0.03	7.0 ± 0.01	0.926
Absolute fecundity^b	815.3 ± 4.09	765.7 ± 15.01	787 ± 17.06	779.7 ± 25.03	0.060
Spawning frequency per female	3.77 ± 0.48^b	4.0 ± 0.85^b	4.95 ± 0.96^a	4.93 ± 0.17^a	<0.001
First spawning interval (day)	44.93 ± 1.01^a	31.15 ± 0.46^c	31.71 ± 0.77^c	41.67 ± 0.21^b	<0.001

CTR, control group fed unsupplemented diet; Na₂SeO₃, fish group administered diet supplemented with sodium selenite (1 mg Se/kg); NPSe, fish group administered diet supplemented with selenium nanoparticles (1 mg NPSe/kg); Na₂SeO₃ + NPSe, fish group administered diet supplemented with combination of sodium selenite (0.5 mg Se) and selenium nanoparticles (0.5 mg NPSe) per kg. TSE/pond, total spawned egg per pond; TSE/fish, total spawned egg per fish. ^aMean number of eggs at each spawning per gram body weight. ^bMean number of eggs at each spawning per fish. The presented data were analyzed by applying one-way ANOVA. Data are the mean ± SD. The significant between represented values was identified at . ^a,b,c,dDifferent lowercase superscript letters in the same row indicate that the difference between groups is significant.