DAO 100:77-81 (2012)  -  DOI: https://doi.org/10.3354/dao02492

NOTE
Catfish hybrid Ictalurus punctatus × I. furcatus exhibits higher resistance to columnaris disease than the parental species

Covadonga R. Arias1,*, Wenlong Cai1, Eric Peatman2, Stephen A. Bullard3

1Aquatic Microbiology Laboratory, Department of Fisheries and Allied Aquacultures, 253 Upchurch Hall, Auburn University, Auburn, Alabama 36849, USA
2Fish Genetics Laboratory, and 3Parasitology Laboratory, Department of Fisheries and Allied Aquacultures, 203 Swingle Hall, Auburn University, Auburn, Alabama 36849, USA

ABSTRACT: We present experimental data on susceptibility to columnaris disease, caused by the bacterium Flavobacterium columnare, in hybrid catfish (female channel catfish Ictalurus punctatus × male blue catfish I. furcatus) (C×B). Under our experimental conditions, C×B 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 C×B 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, C×B hybrid and blue catfishes were strongly resistant to the ARS-1 strain, with <10% mortality. Our data suggest enhanced disease resistance of the C×B hybrid to columnaris disease.


KEY WORDS: Channel catfish · Blue catfish · Flavobacterium columnare


Full text in pdf format  
Cite this article as: Arias CR, Cai W, Peatman E, Bullard SA (2012) Catfish hybrid Ictalurus punctatus × I. furcatus exhibits higher resistance to columnaris disease than the parental species. Dis Aquat Org 100:77-81. https://doi.org/10.3354/dao02492

Export citation
Mail this link - Contents Mailing Lists - RSS
- -