DOI: 10.5061/dryad.79cnp5j86
title: Climate data collected during sonar estimation of summer chum and pink salmon in the Anvik River, Alaska, 2023

description: Dual-frequency identification sonar (DIDSON) was used to estimate adult
 summer chum salmon Oncorhynchus keta and pink salmon O. gorbuscha passage
 in the Anvik River from June 15 to July 26, 2023. Apportionment to species
 was determined using data collected from tower counts. A total of 60,665
 (SE 778) summer chum were observed to have passed the sonar site, but no
 pink salmon were observed in 2023.A beach seine sample fishery was
 conducted to collect age, sex, and length information. A high-water event
 necessitated removing the sonars from the water from July 10 until July 24
 and the sample fishery was discontinued after July 7. Due to the timing
 and extended duration, it was not possible to estimate the missing portion
 of the run. The range of ensonification was considered adequate for most
 fish that migrated upstream. Climate data was collected every day at 1800
 and water temperature data was collected hourly.
description: Climatic and hydrologic data were collected at approximately 1800
 each day at the sonar site. River depth was monitored using a staff gauge
 marked in 1 cm increments. Change in water depth was presented as negative
 or positive increments from the initial reading of 0 cm. Air temperature
 and subjective notes about wind speed and direction, cloud cover, and
 precipitation were also recorded. Water temperature was measured using a
 HOBO data logger, which electronically recorded the temperature every
 hour, on the hour, for the duration of the project.
description: # Climate data collected during sonar estimation of summer chum and pink
 salmon in the Anvik River, Alaska, 2023 Dataset DOI:
 [10.5061/dryad.79cnp5j86](10.5061/dryad.79cnp5j86) ## Description of the
 data and file structure These data were collected while investigating
 adult summer chum salmon (Oncorhynchus keta) and pink salmon (O.
 gorbuscha) passage in the Anvik River, Alaska. ### Files and variables
 #### File: 2023_Anvik_River_Climate_Observations.csv
 **Description:** Climatic observations recorded daily at 1800 at the Anvik
 River sonar project site, 2023. ##### Variables * Date (M/D/YYYY *
 Precipitation: (code a: Precipitation code for the preceding 24-hour
 period: A = none; B = intermittent rain; C = continuous rain; D = snow and
 rain mixed; E = light snowfall; F = continuous snowfall; G = thunderstorm
 with or without precipitation.) * Wind Direction (code b: Wind direction
 code: N = North; S = South; E = East; W = West; V = Variable; NA = Not
 applicable (no wind).) * Wind Velocity (kph) * Sky (code c: Instantaneous
 cloud cover code: C = clear, cloud cover &lt; 10% of sky; S = cloud cover
 &lt; 60% of sky; B = cloud cover 60–90% of sky; O = overcast (100%); F =
 fog, thick haze, or smoke.) * Air temperature (degrees C) Missing Data: ND
 indicates no data recorded #### File:
 2023_Anvik_River_Water_Temperature.csv **Description:** Daily water
 temperatures on the left bank at the Anvik River sonar project, 2023.
 ##### Variables * Date (M/D/YYYY * Minimum (degrees C) * Maximum (degrees
 C) Missing Data: ND indicates no data recorded ## Access information Other
 publicly accessible locations of the data: Data was derived from the
 following sources: