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Journal of Experimental Biology 50,327-333 (1969)
Published by Company of Biologists 1969

Water Uptake and Embryonic Development in Eggs of Chorthippus Brunneus Thunberg (Saltatoria: Acrididae)

F. MORIARTY 1

1 Monks Wood Experimental Station, The Nature Conservancy, Abbots Ripton, Huntingdon

1. The pattern of water absorption by eggs of Chorthippus brunneus varies greatly between individuals.

2. The time at which water is absorbed does not have a close relationship with the stage of embryonic development.

3. Water absorption is not essential for prediapause development.

4. Eggs can only undergo blastokinesis and further development, after diapause is broken, if some water has been absorbed.

5. The rate of water loss or gain varies with the osmotic pressure of sodium chloride solutions.

6. Eggs which have started to absorb water appear to become desiccated more rapidly than eggs which have not.

Submitted on July 17, 1968






© The Company of Biologists Ltd 1969