Aggressive Communication By Larus Gla Ucescens Part Ii. Visual Communication
In: BehaviourSearch for other papers by John F. Stout in
Current site
Google Scholar
Search for other papers by Melvin E. Brass in
Current site
Google Scholar
Abstract
Pairs of complete models or wooden block models with adjustable stuffed heads of Larus glaucescens were placed in gull territories. Choice of attack on the models revealed that the head and neck of L. glaucescens are the parts of the body that release aggressive display in territorial behavior. When using models with the head and neck mounted in a normal posture, the upright threat model received a significantly greater number of attacks than the oblique model. The oblique model received a significantly greater number of attacks than the choking model. When comparing the reactions caused by the abnormal postured head at levels identical to those of the normal aggressive postures upright threat, oblique and choking, there were similar results. It was apparent that visual communication was accomplished by head level. A higher head level portrayed lower level of aggressiveness, whereas a lower head level portrayed greater level of aggressiveness and inhibited attack on the model. Secondary aggressive stimuli, such as squinted eyes and muscle tension, are probably not significant in evoking or prohibiting an attack.
Purchase
Buy instant access (PDF download and unlimited online access):
Institutional Login
Log in with Open Athens, Shibboleth, or your institutional credentials
Personal login
Log in with your brill.com account
| All Time | Past 365 days | Past 30 Days | |
|---|---|---|---|
| Abstract Views | 326 | 49 | 2 |
| Full Text Views | 164 | 1 | 0 |
| PDF Views & Downloads | 55 | 2 | 0 |
Aggressive Communication By Larus Gla Ucescens Part Ii. Visual Communication
In: BehaviourSearch for other papers by John F. Stout in
Current site
Google Scholar
PubMed
Search for other papers by Melvin E. Brass in
Current site
Google Scholar
PubMed
Abstract
Pairs of complete models or wooden block models with adjustable stuffed heads of Larus glaucescens were placed in gull territories. Choice of attack on the models revealed that the head and neck of L. glaucescens are the parts of the body that release aggressive display in territorial behavior. When using models with the head and neck mounted in a normal posture, the upright threat model received a significantly greater number of attacks than the oblique model. The oblique model received a significantly greater number of attacks than the choking model. When comparing the reactions caused by the abnormal postured head at levels identical to those of the normal aggressive postures upright threat, oblique and choking, there were similar results. It was apparent that visual communication was accomplished by head level. A higher head level portrayed lower level of aggressiveness, whereas a lower head level portrayed greater level of aggressiveness and inhibited attack on the model. Secondary aggressive stimuli, such as squinted eyes and muscle tension, are probably not significant in evoking or prohibiting an attack.
| All Time | Past 365 days | Past 30 Days | |
|---|---|---|---|
| Abstract Views | 326 | 49 | 2 |
| Full Text Views | 164 | 1 | 0 |
| PDF Views & Downloads | 55 | 2 | 0 |
