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Naidu, S.G. 2001. Osmoregulation in Onymacris rugatipennis, a free-ranging tenebrionid beetle from the Namib Desert. Comparative Biochemistry and Physiology - Part A: Molecular & Integrative Physiology, 129(4): 873-885


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Osmoregulation in Onymacris rugatipennis, a free-ranging tenebrionid beetle from the Namib Desert.

Summary / Notes:

Haemolymph levels of organic and inorganic constituents were investigated in the tenebrionid Onymacris rugatipennis during dehydration and rehydration. The major osmolar effectors are sodium (26%), chloride (24%), amino acids (18%), and sugars (11%); regulation of haemolymph osmotic pressure (OP) during dehydration is effected largely by a reduction in the haemolymph content of these constituents. Changes in amino acid levels are not the result of interchanges with soluble protein. During rehydration, the main contributors to osmoregulation are sodium (26%), chloride (24%), and an increase in haemolymph solute(s) not measured in this study (31%). Of the sodium removed from the haemolymph during dehydration, 21.2% was excreted. Keywords: Water balance, Osmoregulation, Onymacris rugatipennis rugatipennis, Tenebrionidae, Namib Desert.

Year: 2001

Type: Journal Article

Origin: DRFN DLIB

URL: http://www.sciencedirect.com/science/article/pii/S109564330100352X


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Naidu, S.G. 2001. Osmoregulation in Onymacris rugatipennis, a free-ranging tenebrionid beetle from the Namib Desert. Comparative Biochemistry and Physiology - Part A: Molecular & Integrative Physiology, 129(4): 873-885
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