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Excretion of cadmium and zinc during moulting in the grasshopper Omocestus viridulus (orthoptera)
Author(s) -
Lindqvist Lars,
Block Mats
Publication year - 1994
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.5620131017
Subject(s) - moulting , grasshopper , orthoptera , cadmium , nymph , acrididae , zinc , zoology , biology , chemistry , botany , ecology , larva , organic chemistry
Nymphs of Omocestus viridulus (Orthoptera) were reared on grass leaves containing known amounts of 109 Cd or 65 Zn. After the animals moulted to adults, contents of these metals were measured in the grasshoppers, in the cast of exuviae and in the feces produced during rearing. Dry weights of adult bodies and exuviae were lower for 109 Cd‐treated grasshoppers than for those given 65 Zn. Exuviae accounted for only a minor part of the excreted 109 Cd and 65 Zn. The 109 Cd was assimilated from food to a much smaller extent than was 65 Zn. After 15 d of rearing, −50% of the ingested 65 Zn, but only 10% of the ingested 109 Cd, remained in the grasshoppers. Because the amount of 109 Cd in the grasshopper nymphs decreased with time, whereas that of the exuviae were constant, content in exuviae constituted a larger portion of the total content of 109 Cd with increasing time between feeding of 109 Cd and moulting. For 65 Zn there was no such trend.