Aggressive behavior in the antennectomized male cricket Gryllus bimaculatus
Aggressive behavior in the antennectomized male cricket Gryllus bimaculatus
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DOI：
10.1242/jeb.079400
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发表时间：
2013-06-01
影响因子：
2.8
通讯作者：
Aonuma, Hitoshi
中科院分区：
文献类型：
--
作者：
Sakura, Midori;Aonuma, Hitoshi
雄性蟋蟀（Gryllus bimaculatus）对攻击的雄性蟋蟀表现出强烈的防御攻击行为，最常导致战斗。战斗结束后，失败者在第二次与另一名雄性单独遭遇时不再表现出攻击性；相反，被击败的雄性表现出回避行为。在这里，我们研究了触角的感觉输入在男性防御攻击行为中的作用。当我们从雄性（触角被切除的雄性）身上取下触角时，我们发现它们对彼此几乎没有表现出攻击性，但它们仍然对完整的雄性表现出典型的战斗行为。此外，在第二次遭遇中，触角被切除的失败者对另一只雄性表现出明显比完整的失败者更高的攻击性。我们进一步发现，触角被切除的蟋蟀不会利用视觉或触肢感觉输入来引发攻击行为。相比之下，完整的雄性在赢得战斗之前和之后表现出对雄性角质层物质的攻击行为，如果它们输掉了战斗，它们就会表现出回避行为。因此，触角感觉信息对于调节攻击性和回避行为至关重要。然而，来自触角的感觉输入对于引发防御性攻击行为不是必需的，但对于区分同种雄性并发起针对它们的攻击是必要的。
Male crickets (Gryllus bimaculatus) exhibit intensively defensive aggressive behavior towards attacking males most often culminating in fighting. After the fight, the loser no longer exhibits aggressiveness in a second, separate encounter with another male; rather, the defeated male exhibits avoidance behavior. Here, we investigated the role of sensory input from the antennae in male defensive aggressive behavior. When we removed antennae from males (antennectomized males), we found that they showed little aggressiveness towards each other whereas they continued to exhibit typical fighting behavior towards an intact male. In addition, in a second encounter, antennectomized losers showed significantly higher aggressiveness towards another male than did intact losers. We further found that antennectomized crickets do not utilize visual or palpal sensory input to elicit aggressive behavior. In contrast, intact males showed aspects of aggressive behavior to male cuticular substances before and after winning a fight, and if they lost a fight they showed avoidance behavior. It thus appears that antennal sensory information is crucial in the mediation of aggressive and avoidance behaviors. However, sensory inputs from the antennae are not necessary to elicit defensive aggressive behavior but are necessary to discriminate conspecific males and initiate attacks against them.