What question did this study set out to answer?

To evaluate the variability of nearshore biomass of northern anchovy off California from 2020 to 2024.

February 19, 2026Open Access

Variability in nearshore aerial biomass estimated for the Central Subpopulation of Northern Anchovy (Engraulis mordax) off California from 2020 to 2024

Key Points

To evaluate the variability of nearshore biomass of northern anchovy off California from 2020 to 2024.
Conducted seasonal aerial surveys to estimate nearshore biomass.
Compared aerial estimates with nearshore and offshore acoustic surveys.
Focused on synoptic survey periods occurring within the same week and area.
Identified significant variability in nearshore biomass during the study period.
Nearshore biomass estimates varied notably from acoustic survey data.
Findings suggest that nearshore biomass may be influenced by seasonal patterns.

Abstract

This document describes the variability of nearshore biomass of northern anchovy computed from seasonal, transect-based, aerial surveys conducted from 2020 to 2024 off California and compares these estimates to offshore and nearshore acoustic survey biomass in seasons where all surveys occurred synoptically (i.e., usually within one week and the same latitudinal area).

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Authors

Emmanis Dorval

Kirk Lynn

Trung Hieu NGUYEN

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Variability in nearshore aerial biomass estimated for the Central Subpopulation of Northern Anchovy (Engraulis mordax) off California from 2020 to 2024

Key Points

Abstract

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