The Aggression Behavior Of Velarifictorus Aspersus And Its Regulatory Role Of CDM

Aggressive behaviour between conspecific individuals is common place throughout the Animal Kingdom,individuals often fight for resources including food,territory,female,and so on.Velarifictorus aspersus Walker male adult has extremely developed fighting weapon,and they often fight for territory and female,and winners have higher advantage of occupying resources.In this study,the effect of different experiences(flight,winning a fight and losing a fight)and female resource on fighting behavior of cricket species Velarifictorus aspersus Walker male have been tested,and the regulatory role of OA receptor agonist(chlordimeform,CDM)on its fighting behavior and singing behavior has been discussed.The fighting behavior of female cricket and the effect of different resources(cave and male)on its fighting behavior have been observed.Major results are as follows:1 Effects of experiences and on fighting behavior of male cricketsFlight,or winning a fight could significantly enhance the aggressiveness of cricket males,but the aggression level could not reach to the highest level.Losing a fight could significantly suppress aggressiveness of males.Besides,female presence could extremely enhance the aggressiveness of males,almost all fights escalated into a physical combat,and the promoting effect was stronger than flight or winning a fight.As a result,the fighting behavior of male crickets is highly plastic.2 Effect of OA receptor agonist-CDM on fighting behavior of male cricketsThe result of different CDM dosages on fighting behavior of male crickets showed that application of 0.15 mol/L CDM significantly increased aggression level and aggression duration of males.CDM could significantly increased aggression of losers,but it could not influence the aggression of winners.However,a significantly suppressive effect on aggression level was observed when flown males or courting males were treated by CDM.It seems likely that OA may only partly regulate fighting behavior and other regulatory pathways may also be involved to achieve a physical combat level.3 Effect of OA receptor agonist-CDM on singing behavior of male cricketsFlight,winning a fight or female resource could significantly reduce singing frequency of cricket winners.After a fight,a partly suppressive effect on winner singing behaviour was observed when males with different social experiences were treated by CDM,and CDM could significantly suppress the singing behaiour of flown males.The result illustrates that the activation of octopaminergic system could supress the singing behavior of Velarifictorus aspersus Walker males.4 The effect of cave resource on fighting behavior of female cricketsVelarifictorus aspersus Walker female adult,in contrast to males,rarely interact and usually avoid contact,but will compete aggressively for cave.In terms of fighting for cave resource between long-wing females or short-wing females,the winning rate of cave defender was higher than 70%,and much higher than the intruder.The winning rate of long-wing defender was extremely higher than short-wing defender.This finding shows that cave is an important resource to Velarifictorus aspersus female adult,and different wing phenotypes of fermales have different fighting strategies.