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Researchers report earlier shrimp hatches, complex brine‑fly presence and model divergence in 2024
Summary
Researchers reported earlier and more pronounced hatching plus novel water‑column brine‑fly observations in 2024, and said a spring data gap limited cyst‑prediction model performance.
Connor Simon, a biologist with the Great Salt Lake program, summarized shrimp and brine‑fly monitoring for 2024, describing seasonal shifts in hatching timing, life‑stage amplitudes and new efforts to quantify brine‑fly larvae in the water column.
Simon said surface salinity during 2024 was “much fresher” than recent long‑term averages and that spring temperatures were higher than average, which “meant hatching could occur earlier.” He reported earlier-than‑usual nauplius (hatchling) peaks and larger amplitude peaks for adults and juveniles compared with many prior years. Connor summarized that cyst density rose above the 5‑year average into the fall, then dropped as temperatures fell.
The group discussed a model that predicts fall cyst density from spring counts. Simon explained the model produced a broad prediction range in 2024 because only a single spring month of data was available; with outliers removed the model predicted a much higher fall cyst density than was observed.…
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