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North American Journal of Fisheries Management Volume 24, 2004 - Issue 1
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Management Brief

Use of Ultrasound Imaging to Determine Sex of Shovelnose Sturgeon

Robert E. Colombo Fisheries and Illinois Aquaculture Center, Department of Zoology, Southern Illinois University, Carbondale, Illinois, 62901-6511, USA
,
Paul S. Wills Fisheries and Illinois Aquaculture Center, Department of Zoology, Southern Illinois University, Carbondale, Illinois, 62901-6511, USA
&
James E. Garvey Fisheries and Illinois Aquaculture Center, Department of Zoology, Southern Illinois University, Carbondale, Illinois, 62901-6511, USA
Pages 322-326 | Received 24 Jan 2003, Accepted 29 May 2003, Published online: 08 Jan 2011
 
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Abstract

During November 2002, 51 shovelnose sturgeon Scaphirhynchus platorynchus were sexed by ultrasound imaging using a portable ultrasonograph. We identified males with 96% accuracy (N = 25) and females with 80% accuracy (N = 25); one hermaphroditic individual was misidentified as a male. Overall, ultrasound imaging was 86% accurate. Sex in postspawned females was difficult to determine, 60% being misidentified as males (N = 5). Ultrasonography is an effective noninvasive method for sex determination that can be applied to other species of Acipenseriformes. Modern portable equipment expands its utility to field studies.

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