Search image formation for spider prey in a mud dauber wasp
Luis E Robledo-Ospina1, Nathan Morehouse2, Federico Escobar3
1Red de Ecoetología, Instituto de Ecología, A.C. Carretera antigua a Coatepec No. 351, Xalapa, Veracruz CP 91073, Mexico; Grupo de Aracnología, Universidad de Caldas, Manizales, Caldas, Colombia.
Behavioural Processes
|March 14, 2022
Summary
Mud dauber wasps form search images by focusing on specific visual traits of prey, like color and pattern. This experience-driven bias helps them efficiently hunt orb weaver spiders, improving their foraging success over time.
Area of Science:
- Behavioral Ecology
- Visual Ecology
- Animal Behavior
Background:
- Search images are learned biases improving prey detection in predators.
- Mud dauber wasps show prey specialization, but their search image formation is unstudied from a visual ecology standpoint.
Purpose of the Study:
- To investigate search image formation in the wasp Trypoxylon mexicanum from a visual ecology perspective.
- To analyze the visual traits of spider prey captured by T. mexicanum.
Main Methods:
- Utilized psychophysical visual modeling and multispectral digital photography.
- Measured color and body patterns of captured spiders.
- Compared prey visual traits at community and nest cell levels, considering provisioning sequence and spider diversity.
Main Results:
- Wasps preferentially selected orb weaver spiders (Araneidae) with similar coloration and body patterns.
- Prey color and pattern consistency was observed over time within nests.
- A limited diversity of visually similar spiders were chosen.
Conclusions:
- Specific visual features, like color and pattern, are likely focal traits in wasp search image formation.
- Individual search images in mud dauber wasps may strengthen with experience, leading to prey specialization.
