Wait and Snap: Snapping turtles prey on migratory fish at road-stream crossing culverts

This directory contains the files submitted to the journal for publication and open access.This repository contains the data and R code necessary to reproduce the results presented in "Wait and snap: Common snapping turtles prey on migratory fish at crossing culverts." by Alcott et al. submitted to Biology Letters for peer review.The analyses are split into 3 parts corresponding with different analyses presented in the manuscript:1. Fish positioning - data and analyses for fish cross-sectional position within culverts from underwater videography.2. Stable isotopes - data and analyses for C13 stable isotope analyses of snapping turtle blood samples, river herring muscle tissue, and aquatic vegetation3. Video Observations - data and analyses for quantifying the frequency of various behaviors that were reported from underwater videographyMore detailed information provided within each folder.

本目录收录了提交至期刊用于发表并开放获取的全部文件。本仓库包含复现阿尔科特（Alcott）等人提交至《生物学快报》（Biology Letters）进行同行评审的论文《静待突袭：普通鳄龟在穿越式涵洞处捕食洄游鱼类》中所述研究结果所需的全部数据与R代码。本研究的分析工作分为三个部分，与论文手稿中呈现的不同分析内容一一对应：1. 鱼类定位：基于水下摄像素材，针对涵洞内部鱼类横断面位置开展的相关数据与分析；2. 稳定同位素分析：针对鳄龟血液样本、河鲱肌肉组织及水生植被开展的碳13（C13）稳定同位素分析相关数据与分析流程；3. 摄像观测：基于水下摄像记录，用于量化各类行为发生频率的相关数据与分析。各子文件夹内均包含更为详细的说明信息。