Courtship |
Reaction to female |
Time [s] until focal resident moved
toward a female |
|
Dive display |
Number of alighting of a resident male on the water
surface (a common courtship display in Calopteryx
sp.) |
|
Engagement
|
A nominal value describing a male devotion to courtship:
100%: male attempts to form a tandem, dives on water, patrols a
territory, chases away intruders, does not fly aside (does not leave his
territory during the experimental period), does not perch (does not stop
flying during the experiment);
75%: male patrols a territory, chases away intruders, does not fly
aside, does not perch
50%: male patrols territory, chases away intruders, flies aside,
perches;
25%: no patrolling, no chasing, flights aside, perching during the
experimental trial
|
Aggressiveness |
Reaction to intruder |
Time [s] until focal
resident moved toward the presented intruder male |
|
Bites |
How many times a resident male bit the intruder |
|
Hits |
How many times a resident male hit the intruder |
Boldness
|
Distance to react
|
Binomial distance value:
Near - male escaped when the bird decoy was closer than 0.5m
Far – male escaped when the bird decoy was more than 0.5m away
|
|
Escape distance |
Distance [m; with an accuracy of 0.5m] the focal
resident male flew after the predatory attack simulation |
|
Time to return |
Time [s] passed until the resident returned to
his territory after the predatory attack. The maximum time the observer
waited for the male to come back was 180 s |