Birds of Indian Subcontinent

Fine structural basis of the cutaneous water barrier in nestling Zebra Finches Poephila guttata

Publication Type:Journal Article
Year of Publication:1988
Authors:Menon, GK, Baptista, LF, ELIAS, PETERM, BOUVIER, MICHELE
Date Published:1988
ISBN Number:1474-919X
Keywords:Electron, Estrildidae, Poephila, Poephila guttata, Taeniopygia, Taeniopygia guttata
Abstract:Transepidermal water loss was studied in nestlings, fledglings and adults of the xerophylic Zebra Finch Poephila guttata. Nestlings lose little water (2–4 ppm/0–5 cm2/h) through the skin as compared to adults (60–70 ppm/0–5 cm2/h). Light and electron microscopic examination of the skin sections of both age classes revealed an abundance of lipids in the form of vacuoles and large multigranular bodies in the epidermis of nestlings, but few such lipid bodies in the epidermis of adults. Some of the disc-like contents of granular bodies appear to be extruded into the intercellular spaces. Based on earlier studies with mammals and reptiles, it is concluded that epidermal lipids are the basis of the integumentary permeability barrier in nestlings.
Short Title:Ibis
Taxonomic name: 
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