Replacement of fishmeal for soy protein concentrate in diets for juvenile Litopenaeus vannamei in biofloc-based rearing system

Abstract

-This study aimed to assess the final body weight, weekly weight gain, yield, apparent feed efficiency, protein efficiency ratio, and feed intake of the Pacific white shrimp (Litopenaeus vannamei) fed four diets containing different levels of soy protein concentrate (SPC) as a replacement for fishmeal, reared in a super-intensive biofloc system. Diets consisted of replacing 209 g kg −1 fishmeal at 0, 33, 66, and 100% SPC. Shrimp were raised in a biofloc system using twelve experimental units stocked with 250 shrimp m −3 under constant aeration (O2>5mg L −1 ) and temperature (29±0.5 °C). No significant differences among treatments were observed based on water quality parameters. Shrimp fed diets with 0 and 33% substitution exhibited the highest weekly growth (1.88 and 1.79 g per week) and final weights (15.2 and 14.7 g) compared with shrimp fed the 66 and 100% replacement. A lower feed intake was observed for shrimp fed the 33% SPC diet (3.18 kg per experimental unit) compared with 0% replacement (3.62 kg). Shrimp fed the 33% replacement achieved a similar performance and lower feed intake than animals fed diet without replacement.

Effect of genotype and protein source on performance of Pacific white shrimp (Litopenaeus vannamei)

“…Both FG and HR shrimp genotypes showed no difference in feed efficiency when fed with animal-based diet or vegetal-based diet. The shrimp growth performance and feed efficiency results are preliminary but show typical values of a hyper-intensive shrimp culture system in clear water and also agree with previous works where the shrimp was fed with formulated feed containing total or partial fishmeal replacement with soybean meal and/or soy protein concentrate (Bauer et al 2012;Soares et al 2015;Zhou et al 2015;Chen et al 2017;Jatob a et al 2017;Van Nguyen et al 2017).…”

<b>Soybean protein concentrate in Pacific white shrimp reared in bioflocs: effect on health and vibrio challenge

“…However, PO activity remained at the same level before and after challenge (Table 2). The replacement of fishmeal by soybean protein concentrate at levels of 66 and 100% decreased shrimp growth and yield (Jatobá et al, 2017); however, none of the different replacement levels affected the susceptibility of shrimp to Vibrio sp. challenge, nor did such replacement levels result in significant differences in haemato-immunological parameters evaluated before or after challenge.…”

“…Four isocaloric diets were formulated with different levels of soybean protein concentrate as a replacement for fishmeal (0, 33, 66 and 100 %). Diets were formulated with 271-274 g kg -1 of estimated digestible protein (Jatobá et al, 2017) and similar amounts of marine-origin fat (fish oil + fat contained in the fishmeal), ensuring a similar profile of fatty acids. The protein content, crude lipids, crude fibre, ash and moisture of all diets were determined (Table 1).…”

“…Each tank received 200 shrimp, maintaining an initial density of 250 shrimp m -3 . The rearing trial lasted 42 days, until the animals reached 14.21 ± 0.89 g (Jatobá et al, 2017).…”

Substituição da farinha e do óleo de peixe por farinha e óleo de origem vegetal em rações utilizadas na fase de engorda do camarão-branco-do-pacífico Litopenaeus vannamei, em sistemas de bioflocos

“…Por outro lado, neste estudo foi possível substituir 75% de fontes oriundas de pescado por concentrado proteico de soja, nível maior do que o relatado por Jatobá et al (2017), que também avaliaram a substituição de farinha de peixe por concentrado proteico de soja para o camarão criado em sistema de bioflocos. Os autores relatam que o melhor nível de substituição encontrado foi de 33% da farinha de peixe.…”