Cryptobiosis in the larva of Polypedilum vanderplanki Hint. (Chironomidae)
1960; Elsevier BV; Volume: 5; Issue: 3-4 Linguagem: Inglês
10.1016/0022-1910(60)90011-1
ISSN1879-1611
Autores Tópico(s)Aquatic Invertebrate Ecology and Behavior
ResumoMetabolism in the larva of Polypedilum vanderplanki can be brought reversibly to a standstill by dehydration and exposure to very low or very high temperatures. Larvae metamorphosed after immersion in liquid air or liquid helium when dry. Some metamorphosed after exposure to 102–104°C for 1 min when dry, and some recovered temporarily after exposure to 106°C for 3 hr or 200°C for 5 min. Larvae recovered after immersion in absolute ethanol or pure glycerol when dry. One larva metamorphosed after immersion in absolute ethanol for 24 hr, and all larvae recovered temporarily after immersion for 7 days. Larvae immersed in glycerol for 1, 3, and 7 days respectively metamorphosed. Some larvae recovered temporarily after being stored dry for 10 years. They tolerate repeated dehydration: one larva metamorphosed after ten dehydrations to a moisture content of about 8 per cent or less, each separated by several days in water during which it fed.
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