عنوان مقاله [English]
نویسندگان [English]چکیده [English]
In order to study caudal fin rot with emphasis on Aeromonassp. and Pseudomonassp. in Salmo trutta caspiusfrom the salmonids propagation and breeding center of Shahid Bahonar of kelardasht region, One hundred and eighty brood stocks having fin damage symptoms were chosen. Two bacterial samples from each fish were cultured on Aeromonasand Pseudomonas specific media. After incubation biochemical tests for diagnosing isolated colonies of Aeromonassp. and Pseudomonassp. were performed.The results of biochemical tests showed that isolated bacteriaof Aeromonassp. were belonged to Aeromonas caviae and Aeromonas hydrophila (sub species anaerogenes) by 75% and 25%frequency respectively and bacteriaof Pseudomonassp. were belonged to Pseudomonas fluorescens, Pseudomonas putida and Pseudomonas alcaligenes by 42.1% ,36.48% and 21.05% frequency respectively.