Non-parallel impacts of predators on the evolution of colouration plasticity in Trinidadian killifish

Animal colouration is a key trait affecting survival and reproduction, yet the evolutionary drivers of colouration plasticity remain poorly understood. Here, we examine how predation shapes both baseline colouration and physiological colouration plasticity in the Trinidadian killifish (Anablepsoides hartii). This species inhabits streams that vary in fish predator presence, creating a replicated natural experiment across three rivers. We hypothesised that fish from high-predation sites would exhibit lighter baseline colouration due to associations with open canopy and increased light, and that predation would select for stronger plasticity in background-induced colour change. We assessed colouration before and after exposure to black or white backgrounds and analysed variation by predation regime, river, and sex. Our results show that baseline colouration differed significantly by predation regime, river identity, and sex, with high-predation fish generally lighter. A. hartii also displ..., , # Dryad dataset

Dataset DOI: [10.5061/dryad.2547d7x39](10.5061/dryad.2547d7x39)

## Description of the data and file structure

Data and code supporting the article 'Local adaptation in colouration plasticity of Trinidadian killifish'. This primarily consists of 3 .csv files containing collected data regarding the focal individuals and surrounding ecological measurements. More specifically, all_killifish_colourmap_calib.csv contains the calibrated colour values for each fish, Ecological_variables.csv contains ecological measurement data and Killifish_sex_length.csv contains both the sex and length data for each individual. This dataset also contains the Shape files of Trinidad used to create Figure 1, which was downloaded from [https://hub.arcgis.com/datasets/uwi::coastline-trinidad-and-tobago/about](https://hub.arcgis.com/datasets/uwi::coastline-trinidad-and-tobago/about).

### Files and variables

#### File: Ecological_variables.csv

**Description:** Ecological measurements of the fo...,

动物体色（animal colouration）是影响生存与繁殖的关键性状，但学界对体色可塑性（colouration plasticity）的演化驱动机制仍知之甚少。本研究以特立尼达底鳉（Anablepsoides hartii）为研究对象，探究捕食压力如何塑造其基础体色（baseline colouration）与生理性体色可塑性（physiological colouration plasticity）。该物种栖息于鱼类捕食者存在情况各异的溪流中，为横跨三条河流的重复自然实验提供了研究基础。我们提出如下假说：高捕食压力环境下的个体因栖息于开阔林冠、光照更强的生境，基础体色更浅；同时捕食压力会选择出背景诱导体色变化能力更强的个体。本研究分别在个体暴露于黑色或白色背景前后对其体色进行测定，并按照捕食压力环境（predation regime）、河流与性别三个维度分析体色变异。研究结果显示，基础体色在不同捕食压力环境、河流及性别间均存在显著差异，高捕食压力种群的体色普遍更浅。特立尼达底鳉同样表现出……（原文未完整）

# Dryad数据集
数据集DOI：10.5061/dryad.2547d7x39

## 数据与文件结构说明
本数据集支撑题为《特立尼达底鳉体色可塑性的局部适应》的学术论文。数据集核心包含3个CSV格式文件，存储了目标个体及周边生态环境的实测数据。具体而言：all_killifish_colourmap_calib.csv存储了每尾个体的校准后体色数值；Ecological_variables.csv存储了生态环境测量数据；Killifish_sex_length.csv则包含每尾个体的性别与体长数据。本数据集还包含用于绘制图1的特立尼达地区矢量形状文件（Shapefile），该文件下载自[https://hub.arcgis.com/datasets/uwi::coastline-trinidad-and-tobago/about]。

### 文件与变量
#### 文件：Ecological_variables.csv
**描述：** 目标种群栖息环境的生态测量数据……（原文未完整）