Predation risk elicits a negative relationship between boldness and growth in Helisoma snails

The relationship between risk-prone behavior and growth is central to tradeoff models that explain the existence and maintenance of among-individual variation in behavior (i.e., animal personality). These models posit positive relationships between among-individual variation in risk-prone behaviors and growth, yet how the strength and direction of such relationships depend on ecological conditions is unclear. We tested how different levels of predation risk from crayfish (Faxonius limosus) mediate the association between among-individual variation in snail (Helisoma trivolvis) boldness (emergence time) and growth in shell size. We found that crayfish predation risk reduced snail growth, but that the effect of snail boldness on individual growth was context-dependent – snail boldness was unrelated to growth in the absence of risk and under high risk, but shy snails grew faster than bold snails under low predation risk. Other traits (snail size, body condition and intrinsic growth rate un..., Description of methods and data processing can be found in the associated article and the supplementary material for the article. , , # Data from: Predation risk elicits a negative relationship between boldness and growth in Helisoma snails

Data table description

* individual: individual unique identifier.
* trial: trial order for each individual in the behavioral type experiment.
* behav.treat: treatment unique identifier in the behavioral type experiment.
* growth.treat: treatment unique identifier in the growth experiment.
* length.1: body length (mm) before the behavioral type experiment.
* length.2: body length (mm) between the behavioral type experiment and the growth experiment.
* length.3: body length (mm) after the growth experiment.
* tank: tank unique identifier during the growth experiment.
* growth0: growth rate during the behavioral type experiment.
* growth: growth rate during the growth experiment.
* delta_size0: body length increment (mm) per week during the behavioral type experiment.
* delta_size: body length increment (mm) per week during the growth experiment.
* emergence: emergence time (s) dur...

冒险行为与生长之间的关联，是解释行为变异（即动物个性（animal personality））在个体间存在并得以维持的权衡模型的核心。这类模型假设，冒险行为的个体间变异与生长之间存在正相关，但这类关联的强度与方向如何依赖于生态条件仍尚不明确。我们开展实验，探究螯虾（crayfish, Faxonius limosus）的不同捕食风险水平，如何介导田螺（Helisoma trivolvis）大胆性（boldness，即出巢时间（emergence time））的个体间变异与壳长生长之间的关联。结果发现，螯虾的捕食风险会降低田螺的生长速率，但田螺大胆性对个体生长的影响具有情境依赖性：在无风险与高风险条件下，田螺大胆性与生长均无关联；而在低捕食风险条件下，害羞型田螺的生长速率快于大胆型田螺。其余性状（田螺体型、身体状况与固有生长速率等[原文未完整列出]），方法与数据处理的详细说明可参见相关论文及其补充材料。

# 数据来源：捕食风险引发田螺（Helisoma trivolvis）大胆性与生长间的负相关关联

## 数据表说明
* individual：个体唯一标识符
* trial：行为类型实验中每个个体的试验顺序
* behav.treat：行为类型实验中的处理组唯一标识符
* growth.treat：生长实验中的处理组唯一标识符
* length.1：行为类型实验前的体长（mm）
* length.2：行为类型实验与生长实验之间的体长（mm）
* length.3：生长实验后的体长（mm）
* tank：生长实验期间的养殖缸唯一标识符
* growth0：行为类型实验期间的生长速率
* growth：生长实验期间的生长速率
* delta_size0：行为类型实验期间的周体长增量（mm）
* delta_size：生长实验期间的周体长增量（mm）
* emergence：出巢时间（s）……