期刊
AQUACULTURE RESEARCH
卷 46, 期 4, 页码 789-800出版社
WILEY
DOI: 10.1111/are.12236
关键词
linolenic acid; growth; immunity; disease resistance; Pelteobagrus vachelli
类别
资金
- National Basic Research Program (973 Program) [2009CB118702]
- 'Twelfth Five-year-plan' in National Science and Technology for the Rural Development in China [2012BAD25B03]
- Special Fund for Agro-scientific Research in the Public Interest [201003020, 201203065]
- National Natural Science Foundation of China [31172422]
- Shanghai Committee of Science and Technology, China [09DZ120010A, 10JC1404100]
- Shanghai University Knowledge Service Platform Shanghai Ocean University aquatic animal breeding centre [ZF1206]
- E-Institute of Shanghai Municipal Education Commission [E03009]
Experimental diets were formulated containing six levels of linolenic acid (0%, 0.5%, 1.0%, 1.5%, 2.0% and 2.5%) and each diet was fed to darkbarbel catfish Pelteobagrus vachelli in triplicate for 84days. Weight gain, specific growth rate and feed efficiency increased with the increasing levels of dietary linolenic acid, but were not significantly different among diets containing 1.0%, 1.5%, 2.0% and 2.5% linolenic acid. Red blood cell count and haemoglobin were significantly higher in fish fed the 1.0% linolenic acid than other diets. Lysozyme activity and immunoglobulin M content in fish fed 1.0% of linolenic acid were significantly higher compared with the other diets. Antibody titre in fish fed 1.0-2.5% linolenic acids was significantly higher than in fish fed 0 or 0.5% linolenic acid 14days after Aeromonas hydrophila challenge. This study indicates that linolenic acid is essential to darkbarbel catfish. Two-straight broken-line analysis with SGR showed that a dietary level of 1.29% linolenic acid is the minimum required for adequate growth of darkbarbel catfish. Considering other measured indicators of fish performance, a level of 1.0-1.5% linolenic acid in the diet is recommended for the darkbarbel catfish.
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