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Researchers: brine shrimp counts low through winter but models point to strong cyst production this fall
Summary
Spring brine shrimp (Artemia) counts dropped in January–March, but researchers reported model-based predictions that, after removing sampling outliers, place expected cyst density for the coming fall in a favorable range. Factors such as salinity, chlorophyll, grazing and freshwater inputs were flagged as uncertainties.
Connor Simon, a biologist with the Great Salt Lake Institute program, presented spring monitoring and a harvest model that projects fall cyst density for brine shrimp.
Simon reviewed surface temperature, salinity, chlorophyll and cyst-density time series and said spring counts (January–February) ranged from about 18.7 to 41.33 nauplii (systs) per liter. Using a two-piece regression model that separates density-independent and density-dependent dynamics, the team generated a predictive fall cyst density. "We are poised for good cyst production this coming fall," Simon said, noting model uncertainty from environmental drivers and sampling…
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