Dual Benefits of Whey Protein Concentrate in a Microencapsulated Diet for Larval White Shrimp, Litopenaeus vannamei

Abstract

Abstract— In this work a larval shrimp diet was spray‐dried using a ratio of 75% whey protein concentrate and 25% mesquite gum as wall material, where the sole protein contribution to the diet was the whey protein concentrate. The microencapsulated diet exhibited the following physical properties: mean volumetric particle size of 49.3 om, characteristic floatability time 225.3 min, and density of 606 g/L. Its outer morphology was characterized by a dimpled spherical shape with no evident surface pores or cracks. Inner microstructure showed a central void, with the feed components finely embedded in the wall matrix. Two bioassays were performed with zoea of white shrimp Litopenaeus vannamei. In the first study, microencapsulated diet, and microencapsulated diet plus a single dose of live algae, were compared with a live algae control diet; in the second study, three co‐feeding regimes consisting of microencapsulated diet + 10,30 and 60C. muellericellaL, respectively, were compared with the live algae control diet. In overall terms, the co‐feeding regime with 30 cells/ OL produced larvae with carapace length (0.74‐mm CL) and development index (4.5 DI) significantly superior to that of the live algae treatment (0.70‐mm CL, 4.1 DI; respectively), and yielded similar individual dry weight (34‐Og DW) and survival rate (58%). These results indicate that microencapsulated diets supplemented with live algae can produce responses similar to those of live feed. These results

Evaluation of the Microalgae Paste Viability Produced in a Mollusk Hatchery in Southern Brazil

“…Microalgae production is one of the critical points in many hatcheries because it involves several factors of risk that makes it vulnerable (Okauchi 1991;Molina Grima et al 1994;Duerr et al 1998), further to represent, in some cases, more than half of the total production costs of the aquaculture organisms (Laing and Helm 1981;Fulks and Main 1991;Benemann 1992;Coutteau and Sorgeloos 1992;Borowitzka 1997;Cañavate and Fernándes-Díaz 2001). In the past decades, these problems have promoted many studies on the development of food sources alternative to live microalgae (fresh cultures), such as microparticulate diets (Amjad and Jones 1992), microencapsulated and inert food (Numaguchi and Nell 1991;Medina-Reyna et al 2005), lipid emulsions , yeasts (Nell et al 1996), bacteria (Douillet 1993;Douillet and Langdon 1993), and microalgae concentrates preserved by several techniques (Curatolo et al 1993;Cordero Esquivel and Voltolina Lobina 1996;Papandroulakis et al 1996;Albentosa et al 1997;Knauer and Southgate 1999;Brown and Robert 2002).…”

Evaluation the effect of mycotoxins on shrimp ( Litopenaeus vannamei ) muscle and their limited exposure dose for preserving the shrimp quality

“…The capsules were made as previously described (Deng et al, ). Briefly, commercial diets mixed with different dose of T‐2 or DON or AFB 1 or OTA were encapsulated with ovalbumin (Medinareyna et al, ). A third of the water (pH 7.5 and salinity 10) in each aquarium was replaced daily.…”

Aquatic Plants and Aquatic Animals in the Context of Sustainability: Cultivation Techniques, Integration, and Blue Revolution

“…Live feeds produced in marine hatcheries represent more than 50% of the total production costs for marine larvae production [141]. Previously, these problems have prompted many researchers to seek forage sources other than live microalgae, such as yeasts [142], microparticulate diets [143], micro-encapsulated, and inert food [144] microalgae paste [145], and microalgae past in the form of free lipid biomass, as a biodiesel by-product [62,64]. The microalgae biomass concentrate has many forms, such as dried biomass, freeze-dried, pastes, flakes, defatted (biodiesel by-product), and microalgae by-products of bioindustriesbased-microalgae [145].…”