Fishmeal Replacement with Hermetia illucens Meal in Aquafeeds: Effects on Zebrafish Growth Performances, Intestinal Morphometry, and Enzymology

Fishes

Mahanama De Zoysa¹  Francesca Abramo²  Simona Sagona²  Francesca Coppola²  Letizia Brogi²  Vincenzo Miragliotta²  Carlo Bibbiani²  Lucia Casini²  Baldassare Fronte²  Rosario Licitra² 

[1] College of Veterinary Medicine and Research Institute of Veterinary Medicine, Chungnam National University, Daejeon 34134, Korea;Department of Veterinary Science, University of Pisa, 56126 Pisa, Italy;

关键词: black soldier fly;    digestive enzymes;    fishmeal;    growth performance;    Hermetia illucens;    insect meal;   

DOI  :  10.3390/fishes6030028

来源: DOAJ

【 摘 要 】

Fishmeal (FM) is still the most important protein source in aquafeeds. However, due to the reduction of wild fish stocks used for FM production, its manufacturing it is now unsustainable. Insect meal represents a valid alternative to FM, due to the low carbon footprint of its production and its high nutritional value. The aim of this study was to investigate the potentials of replacing FM with black soldier fly (Hermetia illucens) meal (HIM) in aquafeeds, using zebrafish as the animal model. Four diets were formulated with increasing HIM/FM replacement rate (the control diet contained 20% FM). Mortality rates, growth performances, and feed consumptions were measured, and fish intestine samples were collected for histological and enzymatic analysis. After 49 days, all groups almost tripled their initial body weight (cumulative body weight gain ranged between 143.9 and 155.2 mg), and no statistically significant differences among treatments were observed in relation to growth performances and histological traits. Contrarily, trypsin, alkaline phosphatases, and alpha amylase–glucoamylase activities were significantly reduced when the FM replacement rate was increased. In conclusion, HIM may represent an alternative to FM, since no adverse effects were observed when it was included up to 20% in the zebrafish diet, even when replacing 100% of the FM.

【 授权许可】

Unknown