ichthyoplankton
2 stories filed under ichthyoplankton on World Data Ocean. The newest of them: “Tracking larval fish across seasons reveals spawning hotspots around Korea” and “Saint John Harbour: Establishing a Baseline for Microplastic Levels”. Seasonal surveys of ichthyoplankton across Korean waters reveal a striking contrast: 30 egg taxa and 61 larval taxa in February, versus 53 egg taxa and 154 larval taxa in July. Blue and black fibres dominated every seawater sample collected in Saint John Harbour, and 94% of zooplankton taxa had ingested microlitter. A Global Hub for Ocean Intelligence 4 World Data Ocean is a centralized digital platform where researchers, scientists, and ocean enthusiasts converge to… The list below is every ichthyoplankton story on World Data Ocean, newest first.
Tracking larval fish across seasons reveals spawning hotspots around Korea
Seasonal surveys of ichthyoplankton across Korean waters reveal a striking contrast: 30 egg taxa and 61 larval taxa in February, versus 53 egg taxa and 154 larval taxa in July. This measurable increase in species richness underscores the importance of timing in marine surveys. Regional differentiation sharpened in summer, with *Engraulis japonicus* dominating both eggs and larvae. Understanding these spawning hotspots is foundational to ocean stewardship. For deeper context on climate-driven shifts in marine ecosystems, see our related coverage of the 2025 Temperature Anomalies.
Saint John Harbour: Establishing a Baseline for Microplastic Levels
Blue and black fibres dominated every seawater sample collected in Saint John Harbour, and 94% of zooplankton taxa had ingested microlitter. That finding, from a multi-year survey by our researchers, establishes a critical baseline for microplastic levels in the Bay of Fundy. Notably, larval fish and *Calanus* copepods showed the highest encounter rates. This is empirical, local data, the kind needed to monitor change and assess ecological risk.