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Cristina La is in a lab. She is holding a sample in a small silver container. There are more silver containers in front of her and a colleague is seen in the background.

(Above) Cristina La, who recently earned her master’s degree from SIU Carbondale, shows off samples in the lab. (Photo by Russell Bailey). (Middle) La and her teammates collect samples. (Photo courtesy of Robert Miller from ICF International). (Below) A smelt is smaller than a human’s palm. (Photo courtesy of the U.S. Fish and Wildlife Service)

SIU grad’s research illuminates pollution threats to endangered Calif. fish

The Sacramento Deep Water Ship Channel was still and quiet as the boat cut through the morning fog. For Cristina La, then a graduate student at Southern Illinois University Carbondale, this was the moment she had been preparing for over months of planning and lab work. Somewhere below the boat swam the last remaining stronghold of California’s delta smelt — a tiny, silvery fish whose decline has become a warning signal for the entire Sacramento-San Joaquin Delta ecosystem.

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