The effects of group size and host species on development and survivorship of a gregarious caterpillar Halisidota caryae (Lepidoptera: Arctiidae)
Article first published online: 28 JUN 2008
Volume 15, Issue 1, pages 53–62, February 1990
How to Cite
LAWRENCE, W. S. (1990), The effects of group size and host species on development and survivorship of a gregarious caterpillar Halisidota caryae (Lepidoptera: Arctiidae). Ecological Entomology, 15: 53–62. doi: 10.1111/j.1365-2311.1990.tb00783.x
- Issue published online: 28 JUN 2008
- Article first published online: 28 JUN 2008
- Accepted 15 May 1989
- Key words.;
- Caterpillar growth;
- caterpillar survivorship;
- group size;
- Halisidota caryae;
- host species;
Abstract. 1. The effect on growth and survivorship of the number of Halisidota caryae (Harris) caterpillars in groups feeding on three taxonomically distinct hosts was examined experimentally in the field.
2. Caterpillars grew more rapidly and survived better in larger sized groups than in smaller sized groups.
3. Caterpilliars grew more rapidly and survived better on Carya ovata (Koch) than on Hamamelis virginiana (L) or Quercus velutina (Lam.).
4. There were equal numbers of invertebrate predators on groups of different sizes and thus larger groups had significantly fewer predators per caterpillar than did smaller groups.
5. Invertebrate predators accounted for at least a 10% daily decrease in survivorship.
6. Local movement reduced predation because moving groups had fewer predators than did stationary groups.