期刊
DISEASES OF AQUATIC ORGANISMS
卷 100, 期 1, 页码 77-81出版社
INTER-RESEARCH
DOI: 10.3354/dao02492
关键词
Channel catfish; Blue catfish; Flavobacterium columnare
资金
- Alabama Agricultural Experiment Station HATCH funds
- USDA-ARS/Auburn University
- USDA-ARS CRIS [6420-32000-022-00D]
- Shanghai Ocean University (Shanghai, China)
- Division Of Environmental Biology
- Direct For Biological Sciences [1051106] Funding Source: National Science Foundation
We present experimental data on susceptibility to columnaris disease, caused by the bacterium Flavobacterium columnare, in hybrid catfish (female channel catfish Ictalurus punctatus x male blue catfish I. furcatus) (CxB). Under our experimental conditions, CxB hybrids were significantly more resistant to columnaris disease caused by the highly virulent strain of F. columnare BGFS-27 (genomovar II) than channel catfish and blue catfish. Channel and blue catfish cumulative mortalities after immersion challenge were 74 and 87%, respectively, whereas mortality in the CxB hybrid was 31%. Susceptibility to the strain ARS-1 (genomovar I) was lower among all catfishes, although channel catfish was the least resistant species at 32% cumulative mortality. By contrast, CxB hybrid and blue catfishes were strongly resistant to the ARS-1 strain, with <10% mortality. Our data suggest enhanced disease resistance of the CxB hybrid to columnaris disease.
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