Ecological Dynamics of Pacific Herring Populations

Pacific herring are small pelagic forage fish characterised by complex life histories and pronounced population fluctuations. Spawning occurs in temperate coastal regions during late winter to early spring, where synchronous release of eggs over eelgrass and rocky substrates sets the stage for larval development. Early life-stage survival is tightly linked to spawning phenology, which governs the match or mismatch with plankton blooms. Populations exhibit density-dependent effects, episodic recruitment failures and multi-decadal shifts in distribution and timing of spawning events. Environmental drivers such as freshwater discharge, teleconnection patterns and rising sea temperatures interact with biological factors—predation by fishes and marine mammals, disease prevalence and larval transport—to modulate survival rates and recruitment. Anthropogenic pressures including fisheries harvest, habitat alteration and pollution further shape stock dynamics. Recent declines and slow recoveries in some regions highlight the sensitivity of herring to ecological perturbations and underscore their keystone role in coastal food webs and global nutrient dynamics.

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Ecological Dynamics of Pacific Herring Populations publication trend

The graph below shows the total number of articles in ecological dynamics of pacific herring populations across all publications each year (not limited to Nature Index journals).

Technical terms

Spawning phenology: The timing and seasonal pattern of reproductive events in a population.

Recruitment: The addition of juveniles to a population through survival from larval stages to a defined age or size.

Forage fish: Small schooling fish that serve as a vital prey resource for higher trophic levels.

Acoustic telemetry: A method of tracking animal movements by detecting acoustic transmitters attached to individuals.

Satellite remote sensing: The acquisition of information about Earth through satellite-based sensors, used here to detect biological signals in the marine environment.

References

1. Satellite Remote Sensing of Herring (Clupea pallasii) Spawning Events: A Case Study in the Strait of Georgia. Geophysical Research Letters (2021).
2. An empirical Bayesian approach to incorporate directional movement information from a forage fish into the Arnason-Schwarz mark-recapture model. Movement Ecology (2021).
3. Multi-decadal shifts in the distribution and timing of Pacific herring (Clupea pallasii) spawning in Prince William Sound, Alaska. Canadian Journal of Fisheries and Aquatic Sciences (2021).
4. Evaluating factors affecting the distribution and timing of Pacific herring Clupea pallasii spawn in British Columbia. Marine Ecology Progress Series (2024).