Some Features of Water Saving in Aporia crataegi L. Caterpillars Inhabiting Areas of Dry Climate in Eastern Siberia (Yakutia, Russia)Natalia Li*
Laboratory of Systematics and Ecology of Invertebrates, Institute for Biology Research at Siberian Division of Russian Academy of Sciences, Russia
- *Corresponding Author:
- Natalia Li
Laboratory of Systematics and Ecology of Invertebrates
Institute for Biology Research at Siberian Division of Russian Academy of Sciences, Russia
E-mail: [email protected]
Received date: January 08, 2014; Accepted date: March 15, 2014; Published date: March 18, 2014
Citation: Li N (2014) Some Features of Water Saving in Aporia crataegi L. Caterpillars Inhabiting Areas of Dry Climate in Eastern Siberia (Yakutia, Russia). Entomol Ornithol Herpetol 3:124. doi:10.4172/2161-0983.1000124
Copyright: © 2014 Li N. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Climate in Yakutia is characterized by low winter and hot summer temperatures that cause extreme low air humidity reaching up to 30% in varied periods. Therefore, insects in Yakutia are seasonally faced to extremely dry air that forced them to create special adaptation mechanisms during evolution.
Estimation of water balance for Aporia crataegi L. caterpillars was based on measurements of rates of water loss, respiration and total water content. Our research shows that Aporia crataegi exposed to dry environmental conditions have low cuticular water permeability that was close to that of African beetles. This mechanism allows the insect to keep significant amount of water: up to 70% inside their bodies despite extreme dry conditions that surround them. The study shows that another mechanism making up insect water balance during winter associated with production of ice nucleating proteins transforming water into ice in an insect’s hemolymph is not sufficient for the given species. Additionally, a cocoon they are hidden inside since early autumn, the whole winter and spring also protect the caterpillars from dissociation.