Social and ecological regulation of a decision-making circuit.
Social and ecological regulation of a decision-making circuit.
复制标题
决策回路的社会和生态调节。
作者：
H. Neumeister;Keith W. Whitaker;Hans A. Hofmann;T. Preuss
生态环境、感官输入和内部生理状态都是动物做出适当行为决策时需要整合的因素。然而，这些因素很少在同一系统中进行研究。在非洲丽鱼科鱼 Astatotilapia burtoni 中，雄性根据社会等级中的地位在两种表型之间交替。当占主导地位（DOM）时，鱼类会表现出明亮的体色以及丰富的攻击性和繁殖行为模式，使它们对捕食者来说很引人注目。另一方面，从属（SUB）雄性通过采用神秘的颜色和学校行为来降低捕食风险。因此，我们假设 DOM 会表现出增强的惊逃反应能力，以补偿其增加的被捕食风险。事实上，与 SUB 相比，DOM 对不同强度的声音点击的行为反应显示出明显更高的平均惊吓率。在麻醉动物中进行毛斯纳细胞（M 细胞）（触发惊吓的神经元）的电生理记录，结果显示 DOM 中对声音点击有更大的突触反应，与行为结果一致。此外，突触前 M 细胞的中间神经元（被动超极化电位 [PHP] 细胞）介导的抑制驱动在 DOM 中显着减少。总而言之，结果表明，由于 M 细胞更容易兴奋，DOM 中发生给定听觉刺激的逃跑的可能性更高。更广泛地说，这项研究在可识别的决策神经回路层面上提供了对生态和社会权衡的综合解释。
Ecological context, sensory inputs, and the internal physiological state are all factors that need to be integrated for an animal to make appropriate behavioral decisions. However, these factors have rarely been studied in the same system. In the African cichlid fish Astatotilapia burtoni, males alternate between two phenotypes based on position in a social hierarchy. When dominant (DOM), fish display bright body coloration and a wealth of aggressive and reproductive behavioral patterns that make them conspicuous to predators. Subordinate (SUB) males, on the other hand, decrease predation risk by adopting cryptic coloration and schooling behavior. We therefore hypothesized that DOMs would show enhanced startle-escape responsiveness to compensate for their increased predation risk. Indeed, behavioral responses to sound clicks of various intensities showed a significantly higher mean startle rate in DOMs compared with SUBs. Electrophysiological recordings from the Mauthner cells (M-cells), the neurons triggering startle, were performed in anesthetized animals and showed larger synaptic responses to sound clicks in DOMs, consistent with the behavioral results. In addition, the inhibitory drive mediated by interneurons (passive hyperpolarizing potential [PHP] cells) presynaptic to the M-cell was significantly reduced in DOMs. Taken together, the results suggest that the likelihood for an escape to occur for a given auditory stimulus is higher in DOMs because of a more excitable M-cell. More broadly, this study provides an integrative explanation of an ecological and social trade-off at the level of an identifiable decision-making neural circuit.
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影响因子：
2.5
作者：
H. Neumeister;T. M. Szabo;T. Preuss
通讯作者：
H. Neumeister;T. M. Szabo;T. Preuss
DOI：
--
发表时间：
1991-11
期刊：
The Journal of experimental biology
影响因子：
--
作者：
R. C. Eaton;Deanna S. Emberley
通讯作者：
R. C. Eaton;Deanna S. Emberley
社会等级对慈鲷大脑单胺能活动的影响。
DOI：
10.1159/000112994
发表时间：
1997
期刊：
Brain, behavior and evolution
影响因子：
--
作者：
Winberg,S;Winberg,Y;Fernald,RD
通讯作者：
Fernald,RD
DOI：
10.1073/pnas.89.24.12088
发表时间：
1992-12-15
影响因子：
11.1
作者：
PEREDA, A;TRILLER, A;FABER, DS
通讯作者：
FABER, DS
M 细胞中听觉信号的表示：电突触的作用。
DOI：
10.1152/jn.01287.2005
发表时间：
2006
期刊：
Journal of neurophysiology.
影响因子：
--
作者：
Szabo,TM;Weiss,SA;Faber,DS;Preuss,T
通讯作者：
Preuss,T