Performance of lambari-do-rabo-amarelo <i>Astyanax bimaculatus</i> (Linnaeus, 1758) fed diets based on adult black soldier fly meal: analysis of its effectiveness as a substitute for fish meal

Souza, E .O.; Zeferino, M. R.; Periard, L. R.; Gonçalves-Junior, L. P.; Vargas-Junior, J. G.; Mendonça, P. P.

doi:10.1590/1519-6984.292260

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Original Article • Braz. J. Biol. 85 • 2025 • https://doi.org/10.1590/1519-6984.292260 linkcopy

Performance of lambari-do-rabo-amarelo Astyanax bimaculatus (Linnaeus, 1758) fed diets based on adult black soldier fly meal: analysis of its effectiveness as a substitute for fish meal

Desempenho do lambari-do-rabo-amarelo Astyanax bimaculatus (Linnaeus, 1758) alimentado com dietas à base de farinha de mosca soldado negra adulta: análise da sua eficácia como substituto da farinha de peixe

Authorship SCIMAGO INSTITUTIONS RANKINGS

This study evaluated the performance of the lambari-do-rabo-amarelo Astyanax bimaculatus fed diets containing BSF adult fly meal, replacing fishmeal. Two hundred juveniles were distributed in 20 tanks, with five levels of substitution (0%, 12.5%, 25%, 37.5%, and 50%) for 45 days. The diets were isoproteic and isoenergetic, provided to the animals three times a day. The results showed that the increased substitution impaired the fish's performance, with the highest weight gain in the treatment without substitution (0%). Feed conversion, protein efficiency, and energy efficiency decreased due to the high chitin content of the adult fly. It is concluded that BSF fly meal is not advantageous for the lambari-do-rabo-amarelo.

Keywords:
alternative proteins; aquaculture; feed efficiency; nutritional impact

Ingredient (%)	Substitution level (%)
Ingredient (%)	0%	12.5%	25%	37.5%	50%
BSF	0	3.90	7.80	11.70	15.60
Soybean meal	37.35	37.75	38.00	38.40	38.60
Fish meal	31.20	27.30	23.40	19.50	15.60
Corn	22.49	22.23	22.15	22.03	21.95
Soybean oil	8.49	8.15	7.74	7.35	7.00
L-Lysine	0.31	0.42	0.60	0.67	0.85
Common salt	0.06	0.15	0.21	0.25	0.30
Adsorbent	0.10	0.10	0.10	0.10	0.10
Total	100	100	100	100	100
Nutrients
CP (%)	36	36	36	36	36
DE Mcal/kg	3.6	3.6	3.6	3.6	3.6

Variable	Substitution level (%)
Variable	0%	12.5%	25%	37.5%	50%
*Weight (g)1)	2.84±0.05	2.42±0.06	2.37±0.15	2.29±0.26	2.21±0.12
*TL (cm)2)	5.42±0.10	5.48±0.04	5.58±0.07	5.59±0.08	5.44±0.04
**SL (cm)3)	4.36±0.06	4.39±0.01	4.39±0.05	4.50±0.10	4.38±0.04
**Height (cm)4)	1.47±0.01	1.46±0.03	1.47±0.02	1.50±0.04	1.52±0.02
**SUR (%)5)	97.50	97.50	100.00	97.50	97.50

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[1] CP = crude protein; DE = digestible energy.