DAO 50:145-152 (2002)  -  doi:10.3354/dao050145

Evaluation of radiography, ultrasonography and endoscopy for detection of shell lesions in live abalone, Haliotis iris (Mollusca: Gastropoda)

Hendrik H. Nollens1,*, John C. Schofield2, Jonathan A. Keogh1, P. Keith Probert1

1 Department of Marine Science and
2Department of Laboratory Animal Sciences, School of Medical Sciences, University of Otago, P.O. Box 56, Dunedin, New Zealand

ABSTRACT: Radiography, ultrasonography and endoscopy were examined for their efficacy as non-destructive techniques for the detection of shell lesions in the marine gastropod Haliotis iris Gmelin. X-rays provided 69% correct diagnoses, with detection being restricted to those lesions which were mineralised. Ultrasound also showed potential to reliably detect lesions (83% correct diagnoses), but only where the lesions demonstrated clear 3-dimensional relief. Lesion dimensions were underestimated using ultrasound. Endoscopy, applied to anaesthetised individuals, provided the most accurate method (92% correct diagnoses) for lesion detection and, although invasive, had no discernible effect on survival of the abalone 8 mo after screening.

KEY WORDS: Abalone · Haliotis · Gastropoda · Shell lesion · Detection · Radiography · Ultrasonography · Endoscopy

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