SIZE-RELATED CHANGE IN FEEDING PREFERENCE IN THE CARNIVOROUS LAND SNAIL HAPLOTREMA-CONCAVUM (PULMONATA, STYLOMMATOPHORA)

Authors
ATKINSON JW BALABAN M
Citation
Jw. Atkinson et M. Balaban, SIZE-RELATED CHANGE IN FEEDING PREFERENCE IN THE CARNIVOROUS LAND SNAIL HAPLOTREMA-CONCAVUM (PULMONATA, STYLOMMATOPHORA), Invertebrate biology., 116(2), 1997, pp. 82-85
Citations number
16
Categorie Soggetti
Zoology
Journal title
Invertebrate biology. → ACNP
ISSN journal
10778306
Volume
116
Issue
2
Year of publication
1997
Pages
82 - 85
Database
ISI
SICI code
1077-8306(1997)116:2<82:SCIFPI>2.0.ZU;2-E
Abstract
Carnivorous land snails, Haplotrema concavum, were offered eggs and ha tchlings of conspecifics as well as eggs and hatchlings of another sna il, Anguispira alternata. These snails made clear choices of prey and revealed a size-related change in feeding preference. Although occasio nally engaging in cannibalism, H. concavum exhibited a marked preferen ce for eggs and hatchlings of A. alternata. The tendency to eat eggs d iminished as the snails grew, becoming significantly reduced in snails 6-7 mm in diameter.