Understanding the impact of along-transect resolution on acoustic surveys.

ABSTRACT: Resolution can be defined as the minimum distance between two consecutive sampling points taken by an instrument. In acoustic surveys, the main parameter determining the resolution of sampling along a transect is the distance between successive echosounder transmissions or "pings". An increase in either the time interval between pings or the speed of the vessel increases the inter-ping distance, hence decreasing the effective sampling resolution. This study investigated whether a loss in along-transect resolution affects the mean backscattered acoustic energy, leading to uncertainty and/or bias in abundance estimates. To this end, a real acoustic survey was echo-integrated, followed by the application of a systematic resampling scheme to simulate a decrease in pinging resolution. For each

SUBMITTER: Boyra G 

PROVIDER: S-EPMC10444787 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature