Automated acoustic detection of river herring (Alewife and Blueback Herring) spawning activity

Author:

Staples Amber1,Legett Henry D.1ORCID,Deichmann Jessica L.2ORCID,Heggie Keira1,Ogburn Matthew B.1ORCID

Affiliation:

1. Smithsonian Environmental Research Center Edgewater Maryland USA

2. Smithsonian's National Zoo and Conservation Biology Institute Washington D.C. USA

Abstract

AbstractObjectiveWe used passive acoustic monitoring (PAM) and automatic detection of spawning splashes to examine the timing and environmental drivers of spawning in river herring (Alewife Alosa pseudoharengus and Blueback Herring A. aestivalis).MethodsAcoustic recordings of spawning splashes were collected from March to May 2021 in the Choptank River, Maryland, using an AudioMoth recorder. Recordings were analyzed using a random forest model on the Rainforest Connection ARBIMON platform to determine hourly presence–absence of splashes.ResultAt a seasonal scale, our results suggested two peaks in spawning activity: early March and mid‐April, corresponding with the known phenologies of Alewife and Blueback Herring. Hourly patterns in spawning activity suggested distinct diel cycles, with spawning most concentrated at dawn. In contrast, sonar fish counts collected for 1 week during the season indicated that migration occurred throughout daylight hours. We also found a potential relationship between spawning activity and the presence of great blue herons Ardea herodias.ConclusionOverall, our results demonstrate that PAM can be an efficient and affordable method for studying the spawning ecology of anadromous fish.

Funder

National Fish and Wildlife Foundation

Smithsonian Environmental Research Center

Publisher

Wiley

Subject

Management, Monitoring, Policy and Law,Ecology,Aquatic Science,Ecology, Evolution, Behavior and Systematics

Reference78 articles.

1. Real-time bioacoustics monitoring and automated species identification

2. Andrews S. N.(2014).Fishway efficiency and passage behaviour of Alewife in three fishways on Tantramar Marsh near Amherst Nova Scotia[Doctoral dissertation Acadia University].

3. ASMFC (Atlantic States Marine Fisheries Commission). (2012).River herring benchmark stock assessment volume 1(Stock Assessment Report 12–02). ASMFC.

4. ASMFC (Atlantic States Marine Fisheries Commission). (2017).River herring stock assessment update volume II:State‐specific reports(Stock Assessment Report 12–02). ASMFC.

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