The imagery on this page is the basis for a paper entitled Swim bladder and posterior lateral line nerve of the nurseryfish, Kurtus gulliveri (Perciformes: Kurtidae), by Carpenter, K.E., T.M. Berra, and J.M. Humphries, J.M., Jr. (2004, Journal of Morphology, 260, 193-200). The abstract is as follows:
The morphology of the swim bladder and inner ear of the nurseryfish, Kurtus gulliveri, appear adapted for enhanced pressure wave reception. The saccule is enlarged and surrounded by very thin bone and two large fontanelles that would present reduced resistance to pressure waves. The swim bladder is elaborate, with six dorsolaterally projecting pairs of lobes that are tightly encased in ribs and an additional caudally projecting pair of lobes encased in the first hemal spine. The ribs and musculature surrounding the swim bladder laterally are very thin, so that four or five “rib windows” are readily apparent on back-lit specimens. This swim bladder–rib configuration would also present reduced resistance to pressure waves to enhance function as a peripheral auditory structure. However, high-resolution X-ray computed tomography and dissection reveal no anterior projections of the swim bladder that could serve as a mechanical coupling to the inner ear. The posterior lateral line nerve is well developed and lies directly over the tips of the ribs encasing the swim bladder lobes. This nerve is not, however, associated with a lateral line canal and a lateral line canal is absent on most of the body. We hypothesize that the posterior lateral line nerve transmits mechanosensory information from the swim bladder.
About the Species
This specimen (ODU 3162) was collected from the Marrakri Creek, Northern Territory, Austrailia. It was made available to the University of Texas High-Resolution X-ray CT Facility for scanning by Tim Berra of Ohio State University at Mansfield, Kent Carpenter of Old Dominion University, and Tim Rowe and Julian Humphries of the University of Texas. Funding for scanning was provided by a National Science Foundation Digital Libraries Initiative grant to Dr. Rowe.
About this Specimen
The specimen was scanned by Matthew Colbert on 18 July 2002 along the coronal axis for a total of 899 1024x1024 pixel slices. Each slice is 0.0891 mm thick, with an interslice spacing of 0.0891 mm and a field of reconstruction of 72 mm.
Click on the thumbnail to the left for a spin animation (6.6 mb) of Kurtus with the skeleton rendered transparent to reveal the swim bladder and saccular otoliths.