Alteration of kairomone-induced antipredator response of the freshwater amphipod Gammarus roeseli by sediment type

The importance of sediment type and of kairomones released by juvenile burbot (Lota Iota) on behavioral responses of the freshwater amphipod Gammarus roeseli was studied in laboratory experiments. In the absence of kairomones. G. roeseli preferred coarse substrates; the highest preference was shown...

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Bibliographic Details
Published in:Journal of chemical ecology 2003-06, Vol.29 (6), p.1391-1401
Main Authors: BAUMGÄRTNER, Daniel, KOCH, Ulrike, ROTHHAUPT, Karl-Otto
Format: Article
Language:English
Subjects:
Adaptation, Physiological
Amphipoda - physiology
Animal and plant ecology
Animal behavior
Animal, plant and microbial ecology
Animals
Autoecology
Avoidance Learning
Biological and medical sciences
Environment
Exploratory Behavior
Freshwater
Fundamental and applied biological sciences. Psychology
Gammarus roeseli
Geologic Sediments - chemistry
Gravel
Lota lota
Particle Size
Pheromones - pharmacology
Predatory Behavior
Protozoa. Invertebrata
Sediments
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Summary:The importance of sediment type and of kairomones released by juvenile burbot (Lota Iota) on behavioral responses of the freshwater amphipod Gammarus roeseli was studied in laboratory experiments. In the absence of kairomones. G. roeseli preferred coarse substrates; the highest preference was shown for the most coarse sediment. In the presence of kairomones, the amphipods preferred the less-coarse substrate pebbles over gravel. This difference is an effective antipredator response; G. roeseli is able to hide efficiently in the interstices of the pebbles. Juvenile burbot have a low foraging efficiency on pebbles and preferentially forage in the interstices of coarser sediments. G. roeseli responded differently to kairmones in different sediment types. The amphipods decreased their activity only in pebbles. In gravel, the rate of exploration behavior increased, and on a bare surface, the area containing fish kairomones was avoided.
ISSN:0098-0331
1573-1561
DOI:10.1023/A:1024213403537