Sex-dependent shifts in visual detection thresholds under turbid conditions in an African cichlid

Turbidity is increasing in freshwaters globally due to human activities and is known to affect visually-mediated behaviors in fish. As anthropogenic impacts continue to degrade aquatic environments, it is critical to determine how sensory systems are affected and what this might mean for population persistence. We investigated the effect of turbidity on visual detection thresholds in an African cichlid fish (Pseudocrenilabrus multicolor) that experiences environmental extremes across its East African range. We tested the visual abilities of adult wild-caught fish from two sites representing the extremes of turbidity and oxygen (a high turbidity, high dissolved oxygen river and a low turbidity, low dissolved oxygen swamp). Further, we reared offspring of wild-caught parents from each population in a full-factorial high/low oxygen, high/low turbidity design to tease apart the influence of each stressor on visual detection thresholds. We used an optomotor response test to determine detecti..., , # Sex-dependent shifts in visual detection thresholds under turbid conditions in an African cichlid

This file contains metadata for two files used in two R scripts associated with this manuscript.

Description for WILD CAUGHT: field_opto.xlsx used in field-opto_analysis.R
All code is provided for the analyses as described in the manuscript.

Pseudocrenilabrus multicolor (haplochromine cichlid fish) were collected from two sites in western Uganda and used as the parental population for a rearing experiment. Each row in the dataset represents metrics for a single fish.

Variable Description

ID:   individual number assigned to each fish
Population:  coded for variable for each Population (NYA=River, LWA=Swamp)
Sex: sex of individual fish
SL: standard length of fish (cm)
T1 - direction: randomly determined direction of optomotor apparatus (clockwise (C) or counterclockwise (CC)) for trial 1
T1 - stop: detection threshold; ending turbidity for trial 1 in NTU
T2 - direction: randoml...,

全球范围内，受人类活动影响，淡水水体的浊度正持续升高，且已知该因素会干扰鱼类依靠视觉介导的行为。随着人为活动持续破坏水生环境，明确感官系统受到的影响及其对种群存续的意义至关重要。本研究针对分布于东非区域、栖息环境跨度极大的非洲慈鲷——多色拟髭丽鱼（*Pseudocrenilabrus multicolor*），探究了浊度对其视觉检测阈值的影响。
本研究采集了来自两个极端环境位点的野生成年个体：分别为高浊度、高溶解氧河流种群，与低浊度、低溶解氧沼泽种群，以此测试其视觉能力。进一步地，我们采用全因子实验设计（高/低溶解氧、高/低浊度组合），将两个种群野生亲本的后代置于对应环境中饲养，以厘清两类胁迫因子各自对视觉检测阈值的影响。本研究利用视动反应测试（optomotor response test）测定检测阈值……，# 非洲慈鲷在浊水环境下视觉检测阈值的性别依赖性变化

本文件包含本论文关联的两份R脚本所用的两份数据文件的元数据。
野生个体数据集说明：field_opto.xlsx，用于field-opto_analysis.R脚本
本研究提供了论文中所述分析所需的全部代码。
多色拟髭丽鱼（单倍型慈鲷，haplochromine cichlid）采集自乌干达西部的两个位点，作为饲养实验的亲本种群。本数据集每一行对应单尾个体的各项指标。

变量名 指标说明
ID： 每尾鱼的个体编号
Population： 种群编码变量（NYA=河流种群，LWA=沼泽种群）
Sex： 个体性别
SL： 鱼的标准体长（单位：厘米）
T1 - direction： 第1次试验中视动反应装置的随机转向方向（顺时针（C）或逆时针（CC））
T1 - stop： 检测阈值；第1次试验结束时的浊度（单位：NTU，浊度散射单位，Nephelometric Turbidity Unit）
T2 - direction： 第2次试验的随机转向方向……