Microdissectional investigation of the nephrons in some fishes, amphibians, and reptiles inhabiting different environment
Identifieur interne : 001079 ( Istex/Checkpoint ); précédent : 001078; suivant : 001080Microdissectional investigation of the nephrons in some fishes, amphibians, and reptiles inhabiting different environment
Auteurs : Owen A. Gambaryan [Russie, Allemagne]Source :
- Journal of Morphology [ 0362-2525 ] ; 1994-03.
Abstract
The structure of nephrons in 83 species of fishes, amphibians, and reptiles was investigated by microdissection. Glomerular diameter, nephron length, length of nephron segments, and the ratios between glomerular size and nephron length are presented. In diifferent groups of fishes (Elasmobranchii, Acipenseridae, Teleostei), the adaptation to freshwater or seawater environment may lead to diverse changes of nephron structure. The kidneys of euryhaline teleosts capable of living in fresh water may be aglomerular, as are those of some marine fishes. In contrast, the diameter of glomeruli in some marine fishes is larger than in true freshwater fishes. In amphibians, the adaptation to freshwater environment, as in teleost fishes, has led to different changes of nephron structure. The size of glomeruli in freshwater reptiles is larger in comparison to terrestrial animals, and the distal tubule in desert and freshwater reptiles is longer than in nondesert species. This probably reflects the adaptive changes of the reptilian nephron to freshwater and desert environments. The results of this study show that the nephron structure of lower vertebrates is predominantly determined by the different environments they occupy rather than by progressive changes within the vertebrate sequence. © 1994 Wiley‐Liss, Inc.
Url:
DOI: 10.1002/jmor.1052190311
Affiliations:
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Glomerular diameter, nephron length, length of nephron segments, and the ratios between glomerular size and nephron length are presented. In diifferent groups of fishes (Elasmobranchii, Acipenseridae, Teleostei), the adaptation to freshwater or seawater environment may lead to diverse changes of nephron structure. The kidneys of euryhaline teleosts capable of living in fresh water may be aglomerular, as are those of some marine fishes. In contrast, the diameter of glomeruli in some marine fishes is larger than in true freshwater fishes. In amphibians, the adaptation to freshwater environment, as in teleost fishes, has led to different changes of nephron structure. The size of glomeruli in freshwater reptiles is larger in comparison to terrestrial animals, and the distal tubule in desert and freshwater reptiles is longer than in nondesert species. This probably reflects the adaptive changes of the reptilian nephron to freshwater and desert environments. The results of this study show that the nephron structure of lower vertebrates is predominantly determined by the different environments they occupy rather than by progressive changes within the vertebrate sequence. © 1994 Wiley‐Liss, Inc.</div></front></TEI><affiliations><list><country><li>Allemagne</li><li>Russie</li></country><region><li>District de Darmstadt</li><li>Hesse (Land)</li></region><settlement><li>Francfort-sur-le-Main</li></settlement></list><tree><country name="Russie"><noRegion><name sortKey="Gambaryan, Owen A" sort="Gambaryan, Owen A" uniqKey="Gambaryan O" first="Owen A." last="Gambaryan">Owen A. Gambaryan</name></noRegion><name sortKey="Gambaryan, Owen A" sort="Gambaryan, Owen A" uniqKey="Gambaryan O" first="Owen A." last="Gambaryan">Owen A. Gambaryan</name></country><country name="Allemagne"><region name="Hesse (Land)"><name sortKey="Gambaryan, Owen A" sort="Gambaryan, Owen A" uniqKey="Gambaryan O" first="Owen A." last="Gambaryan">Owen A. 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