Cambridgea plagiata
Description of male contest behaviour
The contest behaviours observed in C. plagiata followed a clear pattern of escalation. Initially, males oriented towards each other, hanging beneath the web, and signalled with bouts of stridulation (using a peg on the ventral side of the pedicel against ridges on the abdomen). This progressed to males approaching each other and tapping the rival cepholathorax with their forelegs. Following this, males showed the highest intensity behaviour recorded (grappling) by opening their chelicerae widely and locking them with those of their opponent. During grappling, males also locked legs with the opponent. Contests were resolved once a male retreated and turned to flee the web. The winning male often gave chase and, in rare cases, stridulated. [1]
参照
- . Weapon allometry and phenotypic correlation in the New Zealand sheetweb spider Cambridgea plagiata. Biological Journal of the Linnean Society. 2018;126(2):349-359.