Determination of optimal feeding rates for juvenile lake sturgeon (Acipenser fulvescens) fed a formulated dry diet

Two 3‐week growth trials were performed to determine the optimum feeding rate of juvenile lake sturgeon (Acipenser fulvescens) fed with a semi‐purified dry diet (protein, 440 g; lipid, 130 g/kg) at different feeding rates: 5, 10, 20, 30, and 40 g/kg body weight per day (BW/.d‐1), for 36 g‐sized fish...

Full description

Saved in:
Bibliographic Details
Published inAquaculture nutrition Vol. 25; no. 6; pp. 1171 - 1182
Main Authors Yang, Song, Zhai, Shao-wei, Shepherd, Brian S., Binkowski, Fred P., Hung, Silas S.O., Sealey, Wendy M., Deng, Dong‐Fang
Format Journal Article
LanguageEnglish
Published Oxford Hindawi Limited 01.12.2019
Subjects
Acipenser fulvescens
Body weight
C/N ratio
Deoxyribonucleic acid
Diet
DNA
Feeding
Feeding habits
Feeding rates
Feeds
Fish
Food conversion
Freshwater fishes
growth
lake sturgeon
Lakes
Lipids
Live feeds
Nucleic acids
nutrient retention
optimum feeding rate
Physical growth
Protein synthesis
Proteins
Retention
RNA
RNA/DNA ratio
Sturgeon
Online AccessGet full text

Cover

More Information
Summary:Two 3‐week growth trials were performed to determine the optimum feeding rate of juvenile lake sturgeon (Acipenser fulvescens) fed with a semi‐purified dry diet (protein, 440 g; lipid, 130 g/kg) at different feeding rates: 5, 10, 20, 30, and 40 g/kg body weight per day (BW/.d‐1), for 36 g‐sized fish; and 2.5, 5, 10, 20, and 30 g/kg BW/.d‐1, for 80 g sized fish. Feeding rates significantly influenced growth performances, feed conversion ratio, wholebody lipid and moisture contents, energy and protein retention, and fasted blood glucose levels (p < 0.05). The ratio of total C/total N measured in whole fish was positively correlated to the feeding rates and the lipid contents of whole fish. Suboptimal feeding significantly depressed growth performance and protein synthesis based on the measurement of RNA/DNA ratio in white muscle. Based on polynomial regression models, an optimal feeding rate to support the maximum growth, protein and energy retention was 34.5, 22 and 27.3 g/kg BW/.d‐1, respectively, for fish sized at 36–72 g; and 29.0, 16.9 and 19.9 g/kg BW/.d‐1, respectively for fish sized at 80–140 g. Results of this study will benefit future research to develop practical feeds to replace frozen live feed and feed management for lake sturgeon.
ISSN:1353-5773
1365-2095
DOI:10.1111/anu.12932