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Utilization of sorghum distillers dried grains in extruded and steam pelleted shrimp diets
Author(s) -
Adedeji Akinbode A,
Zhou Yangen,
Fang Xiaoyun,
Davis Donald A,
Fahrenholz Adam,
Alavi Sajid
Publication year - 2017
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/are.12932
Subject(s) - shrimp , litopenaeus , pellet , biology , sorghum , feed conversion ratio , extrusion , meal , zoology , food science , starch , soybean meal , distillers grains , weight gain , body weight , agronomy , fishery , materials science , raw material , ecology , metallurgy , endocrinology
Use of distillers dried grain with solubles from sorghum ( sDDGS ) was studied with respect to processing and physicochemical quality of shrimp feed, followed by growth trials with Litopenaeus vannamei (Pacific white shrimp). Shrimp diets with 0%, 10%, 20%, 30% and 40% sDDGS inclusion, as a replacement for soybean meal, were produced using extrusion and steam pelleting. Bulk density of extruded feed (0.53–0.58 g cm −3 ) was lower than that of pelleted feed (0.61–0.65 g cm −3 ), although sDDGS level did not have an impact. Finished diets were 100% sinking, with some exceptions in the case of extruded feed. Pellet durability index (89.4–96.3%) had an increasing trend up to 20% and 30% sDDGS for extruded and pelleted diets respectively. Extruded feed had higher degree of gelatinization than pelleted feed, although proportion of gelatinized starch generally decreased with sDDGS level. Water stability (76.2–91.6%) was higher for extruded feed as compared to pelleted feed, and remained unchanged or decreased with sDDGS level. The extruded and pelleted diets were evaluated in two growth trials with L. vannamei for duration of 9 and 6 weeks in 40 and 60 tanks (initial weight 0.36–0.38 g; 10 shrimps per tank) respectively. Significant differences were not observed in final mean weight and survival with respect to sDDGS level, indicating that up to 40% of this novel protein source can be used in feed formulations without affecting the performance of L. vannamei . Comparison of extruded feed with pelleted feed for impact on mean weight and feed conversion ratio did not yield conclusive results.