American white pelican predation on adult sockeye (2014-2023)

Adult Sockeye Salmon (Oncorhynchus nerka) migrate through the area of the Columbia River, USA, home to the largest breeding colony of American White Pelicans (Pelecanus erythrorhynchos). To assess the extent of pelican predation on these salmon, a state-space Bayesian model was employed, estimating predation and survival probabilities with spatial and temporal detail, as well as the annual total of salmon consumed by pelicans. This dataset includes capture-recapture-recovery data, adult salmon counts, and the model code used to generate the predation probabilities, survival probabilities, and yearly estimates of salmon consumed by pelicans., , , # American white pelican predation on adult sockeye (2014-2023)

[https://doi.org/10.5061/dryad.3bk3j9kvt](https://doi.org/10.5061/dryad.3bk3j9kvt)

## Description of the data and file structure

Adult sockeye salmon were observed (captured) returning to the Bonneville Adult Fish Facility from 2014-2023, then subsequently observed (recaptured) alive migrating upriver additional adult fish ladders or dead (recovered) at breeding American White Pelican colonies in the Columbia River Basin. 

Raw data used in this study was acquired from a publicly available databases DART and PTAGIS (CBR 2023, FPC 2023, PSFMC 2024). All Sockeye Salmon included in this study were captured, handled, and tagged as part of separate, independent studies.

### Files and variables

#### File: laddercounts.csv

**Description:** Counts of Adult Sockeye Salmon at Bonneville Dam fishways from 2014-2023

##### Variables

* mm/dd: Month and date of observations
* years: 2014-2023
* counts: Number of tagged and untagge...

美国哥伦比亚河流域为美洲白鹈鹕（Pelecanus erythrorhynchos）最大的繁殖种群栖息地，红大马哈鱼（Oncorhynchus nerka）会在此流域进行洄游。为评估白鹈鹕对该种群红大马哈鱼的捕食程度，本研究采用状态空间贝叶斯模型（state-space Bayesian model），在空间与时间维度上精细化估算捕食概率与存活概率，并统计了鹈鹕每年捕食的红大马哈鱼总数量。本数据集包含标记重捕回收数据、成年大马哈鱼种群计数数据，以及用于生成捕食概率、存活概率与鹈鹕年捕食红大马哈鱼估算量的模型代码。# 美洲白鹈鹕捕食成年红大马哈鱼（2014-2023年）

[https://doi.org/10.5061/dryad.3bk3j9kvt](https://doi.org/10.5061/dryad.3bk3j9kvt)

## 数据与文件结构说明
2014至2023年间，研究人员在邦纳维尔成年鱼类设施（Bonneville Adult Fish Facility）观测到洄游返回的成年红大马哈鱼；后续对这些个体开展了两类观测：一是在额外设置的成年鱼梯中被再次活体捕获，二是在哥伦比亚河流域的美洲白鹈鹕繁殖种群栖息地被发现死亡并回收。

本研究使用的原始数据取自公开数据库DART与PTAGIS（CBR 2023、FPC 2023、PSFMC 2024）。本研究纳入的所有红大马哈鱼均为独立研究项目中完成捕获、处理与标记的个体。

### 文件与变量
#### 文件：laddercounts.csv
**描述**：2014至2023年邦纳维尔大坝鱼道内成年红大马哈鱼的计数数据
##### 变量
* mm/dd：观测日期的月/日格式
* years：统计年份，范围为2014-2023年
* counts：带标记与未带标记的红大马哈鱼数量（原文未完整列出）