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- Title
A chromic oxide method for measuring consumption in dung-eating Aphodius larvae.
- Authors
Holter, Peter
- Abstract
Larvae of Aphodius rufipes L. (Coleoptera, Scarabaeidae) were transferred from natural cow dung to a mixture of sieved dung and Cr2O3. After 1.5 hr in this medium the larvae were killed and the amount of Cr2O3 consumed was determined. Disregarding possible did rhythms, it was shown that the consumption thus obtained must be multiplied by 14.5 (second instar) or 12.9 (third in-star) to give the consumption of undisturbed larvae during 24 hr. The following sources of error were found to be insignificant within certain limits: (1) the use of whole larvae for Cr2O3 analysis, (2) variations in water content of the Cr2O3 dung, (3) larval selectivity as to size of dung particles, and (4) the presence of Cr2O3. Natural dung with Lycopodium spores added was ingested at the same rate as Cr2O3-dung.
- Subjects
APHODIUS; OXIDES; CLUB mosses; LARVAE; DEVELOPMENTAL biology; SCARABAEIDAE
- Publication
Oikos, 1973, Vol 24, Issue 1, p117
- ISSN
0030-1299
- Publication type
Article
- DOI
10.2307/3543258