Effects of soy protein ratio, lipid content and minimum level of krill meal in plant-based diets over the growth and digestibility of the white shrimp,Litopenaeus vannamei

Abstract

This study evaluated the effects of soy protein ratio, lipid content and the minimum dietary level of krill meal in plant-based diets over the growth performance and digestibility of Litopenaeus vannamei. Nine plant-based diets varied the soybean meal (SBM) and soy protein concentrate (SPC) inclusion ratio at 1 : 2.3, 1 : 1 and 2.5 : 1, and their dietary lipid content at 121.4 AE 9.4, 102.3 AE 1.2, and 79.9 AE 1.2 g kg À1 (in a dry matter basis). An additional diet containing 120 g kg À1 of fish meal (salmon byproduct) was used as a control. Krill meal was included at 0, 5, 10, 20 and 30 g kg À1 in a new set of plant-based diets. After 10 weeks in clear-water tanks of 0.5 m 3 , no effect of SBM:SPC ratio and dietary lipid content was detected on shrimp survival. However, dietary lipid levels of 80 and 121 g kg À1 combined with a high SPC to SBM resulted in the lowest final body weight and the poorest apparent crude protein digestibility, respectively. Krill meal increased feed intake at only 10 g kg À1 , while at 20 g kg À1 , it accelerated shrimp growth, increased yield and reduced food conversion ratio.

Feed preference and growth response of juvenile Litopenaeus vannamei to supplementation of marine chemoattractants in a fishmeal‐challenged diet

“…The diet with 3% KRM remained the most effective in the increase of shrimp final BW and yield and in the reduction of FCR in L. vannamei . The ability of KRM in stimulating feed ingestion and growth performance in penaeid shrimp is corroborated by other studies conducted with both P. monodon and L. vannamei (Sá et al, ; Sabry‐Neto et al, ; Smith et al, ; Williams et al, ). However, there was scarce information with regard to its performance relative to other marine raw materials with stimulatory feeding properties.…”

“…In recent years, there has been a strong movement toward low fishmeal shrimp feeds (Tacon & Metian, ), resulting in a greater dietary inclusion of plant and rendered animal by‐products (Malcorps et al, ; Suresh, Paramasivam, Vasagam, & Nates, ). Such changes can severely impact shrimp growth, as these alternate proteins are often deficient in one or more essential nutrients (Nunes, Sá, Browdy, & Vázquez‐Añón, ; Sá, Sabry‐Neto, Cordeiro‐Júnior, & Nunes, ) and contain antinutritional factors, which can suppress feeding stimulus and reduce nutrient bioavailability (Gatlin et al, ; Nunes, Sá, Andriola‐Neto, & Lemos, ; Sabry‐Neto, Lemos, Raggi, & Nunes, ).…”

Astaxanthin krill oil enhances the growth performance and fatty acid composition of the Pacific whiteleg shrimp, Litopenaeus vannamei , reared under hypersaline conditions

“…Shrimp of 0.65 ± 0.28 g body weight (n = 152) were transferred and stocked in 50 clear-water indoor tanks of 0.5 m 3 at 80 shrimp per tank (140 shrimp/m²) under a water salinity of 31 ± 1.8 g/L. The tank rearing system adopted is described by Sabry-Neto, Lemos, Raggi, and Nunes (2016).…”

Long-term impact of a 4-day feed restriction at the protozoea stage on metabolic gene expressions of whiteleg shrimp (Litopenaeus vannamei)

“…Several studies have shown that the whiteleg shrimp, Litopenaeus vannamei, can be raised with almost complete replacement of fishmeal (FM) by plant proteins, mainly soybean meal and concentrate (Suárez et al, 2009;Sookying, Davis & Soller Dias da Silva, 2013;Sabry-Neto et al, 2016). However, industrially compounded feeds continue to rely on FM as a significant source of dietary protein.…”