Gross, histological and ultrastructural morphology of the aglomerular kidney in the lined seahorse Hippocampus erectus.
Histologic evaluation of the renal system in the lined seahorse Hippocampus erectus reveals a cranial kidney with low to moderate cellularity, composed of a central dorsal aorta, endothelial lined capillary sinusoids, haematopoietic tissue, fine fibrovascular stroma, ganglia and no nephrons. In comparison, the caudal kidney is moderately to highly cellular with numerous highly convoluted epithelial lined tubules separated by interlacing haematopoietic tissue, no glomeruli, fine fibrovascular stroma, numerous capillary sinusoids, corpuscles of Stannius and clusters of endocrine cells adjacent to large calibre vessels. Ultrastructural evaluation of the renal tubules reveals minimal variability of the tubule epithelium throughout the length of the nephron and the majority of tubules are characterized by epithelial cells with few apical microvilli, elaborate basal membrane infolding, rare electron dense granules and abundant supporting collagenous matrix.
University of Georgia College of Veterinary Medicine, Department of Pathology and Athens Veterinary Diagnostic Laboratory, 501 DW Brooks Drive, Athens, GA 30602, U.S.A.
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Fogelson
University of Florida School of Forest Resources & Conservation, Program in Fisheries and Aquatic Sciences Tropical Aquaculture Laboratory, 1408 24th St Southeast, Ruskin, FL 33570, U.S.A.
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Yanong
University of Florida, Aquatic Pathobiology Laboratory, 1379 Mowry Rd, Gainesville, FL 32608, U.S.A.
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Kane
University of Florida, Aquatic Pathobiology Laboratory, 1379 Mowry Rd, Gainesville, FL 32608, U.S.A.
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Teal
One Water, One Health, LLC, 8214 Golden Valley Rd, Golden Valley, MN 55427, U.S.A.
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Berzins
Department of Biomedical Sciences & Pathobiology, VA-MD Regional College of Veterinary Medicine, Virginia Tech, Duck Pond Drive, Blacksburg, VA 24061, U.S.A.
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Smith
University of Georgia College of Veterinary Medicine, Department of Pathology and Athens Veterinary Diagnostic Laboratory, 501 DW Brooks Drive, Athens, GA 30602, U.S.A.
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Brown
University of Georgia College of Veterinary Medicine, Department of Pathology and Athens Veterinary Diagnostic Laboratory, 501 DW Brooks Drive, Athens, GA 30602, U.S.A.
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Camus
D000818:Animals; D060226:Head Kidney / Q000033:anatomy & histology* / Q000648:ultrastructure*; D007668:Kidney / Q000033:anatomy & histology* / Q000648:ultrastructure*; D007678:Kidney Glomerulus / Q000648:ultrastructure; D007684:Kidney Tubules / Q000648:ultrastructure; D009399:Nephrons / Q000648:ultrastructure; D023701:Smegmamorpha / Q000033:anatomy & histology*
anatomy; renal; syngnathid; tubules