Effect of different predators on the escape response of Placopecten magellanicus
| Autor: | John H. Himmelman, Xavier Janssoone, Helga Guderley, Hernan Pérez Cortes, Isabelle Tremblay, Madeleine Nadeau |
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| Rok vydání: | 2015 |
| Předmět: |
0106 biological sciences
Leptasterias polaris animal structures Ecology biology 010604 marine biology & hydrobiology Asterias Escape response Aquatic Science biology.organism_classification 010603 evolutionary biology 01 natural sciences Tonic (physiology) Placopecten magellanicus Solaster endeca Cancer irroratus Juvenile 14. Life underwater Ecology Evolution Behavior and Systematics |
| Zdroj: | Marine Biology. 162:1407-1415 |
| ISSN: | 1432-1793 0025-3162 |
| Popis: | To assess whether giant scallops, Placopecten magellanicus use distinct escape strategies to respond to their seastar and crustacean predators, escape responses to two major seastar predators, Asterias vulgaris and Leptasterias polaris, two seastars with little predatory impact, Crossaster papposus and Solaster endeca, and two crustacean predators, Cancer irroratus and Hyas araneus were compared. A glass rod served as a mechanical control. The responses of juvenile [2+ year (y), ~36-mm shell height (SH)] and adult (6+ y, ~100-mm SH) scallops from the Magdalen Islands, Quebec, Canada, were assessed in early summer 2005. The predatory seastars evoked the strongest response, in terms of both response latency and minimum interval between phasic contractions and numbers of phasic contractions, particularly early in the escape response. Both the minor seastar predators and crabs stimulated stronger responses than the mechanical control. Juvenile scallops were livelier than adult scallops. As P. magellanicus consistently responded to predators with an initial flurry of phasic contractions that tapered off to spaced phasic contractions separated by increasingly long tonic contractions, only the intensity of the escape response seems to have been modified by selection. |
| Databáze: | OpenAIRE |
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