Research
| Title： | Impacts of microdiet manufacturing technologies on the growth performance of large yellow croaker ( Pseudosciaena crocea ) larvae |
|---|---|
| First author： | Wang, Jian; Wang, Aili; Fan, Hua; Yin, Xingqiang; Qian, Xueqiao; Xie, Shouqi |
| Journal： | AQUACULTURE REPORTS |
| Years： | 2020 |
| DOI： | 10.1016/j.aqrep.2020.100362 |
| Abstract： | Crumbled feed (CF) is the most commonly used microdiet in the weaning phrase of large yellow croaker ( Pseudosciaena crocea ) in China. However, CF can be inefficient for local hatcheries due to its low water stability. In this study, we evaluated a more water -stable microdiet (micro -extrusion marumerization diet or MM) in comparison to the CF, and ascertained their effects on the growth of larval croaker. Our results showed that the MM (ca. 98% dry weight retained) was much more water -stable than the CF (only 76% dry weight retained) after 5 min vigorous aeration. This was especially true for the preservation of lipid content, 40% of which was lost from the CF. The remaining intact structure and nearly unchanged nutritional composition of the MM enabled greater fish growth performance after a 24 -day feeding trail, with 37% more dry weight gained than CF -fed larvae. Additionally, fish body compositions of each treatment directly reflected the nutritional profiles of each diet after aeration, and CF -fed fish had a significantly lower lipid content than those fed the MM (8.97 vs. 15.2%). Our results suggest that MM is a more suitable microdiet for the weaning phrase of croaker in hatcheries with vigorous aeration. |
