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Document Type

Research

Abstract

The rate of water loss of Melanoplus differentialis eggs at different developmental stages has been determined. No qualitative difference in respect to rate was found between wet (hypertonic solutions) and dry (calcium chloride) dehydration. The resistance to desiccation decreases with morphological age of developing eggs. Diapause eggs are most resistant. The rate of desiccation does not seem to be closely associated with metabolic activity as represented by that fraction of the respiration which is dependent on structure, or which may he depressed by certain CO/O2 mixtures. Isolated embryos do not show qualitatively the same dehydration rate difference as do intact eggs. The oxygen consumption of dehydrated eggs decreased during water loss. In no cases was an increase observed during dehydration. The vital limit of desiccation of post-diapause eggs was found to be about 46% of the initial water.

Publication Date

1936

Journal Title

Proceedings of the Iowa Academy of Science

Volume

43

Issue

1

First Page

397

Last Page

397

Copyright

© Copyright 1936 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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