behavior/neurological
• low auditory startle response
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• swims in circle
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hearing/vestibular/ear
• auditory threshold of 74 dB, indicating that lines are severely hearing impaired in 3-weeks old
• auditory threshold of more than 90 dB, indicating that lines are severely hearing impaired in 2-month-old animals
• no structural defects in the cochlea or nervous systems were found
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