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Delta Smelt Collapse Part Of Drought's Toll On California

Amy Quinton
Capital Public Radio

The latest survey of California's endangered Delta Smelt has turned up just one fish. While the population has been in decline for years, UC Davis biologist Peter Moyle says the drought has stressed the species to the brink of extinction. 

Moyle: "I've been tracking these fish for years including in my own surveys, and we've been seeing this long term decline, but still I was quite startled."

He blames a number of factors for the almost complete collapse, but says the drought is a big factor.

Moyle says biologists can maintain a captive population of the smelt for some time, but even reintroducing the fish in the future would be a major challenge.

Moyle: "That's the reason that population is there. Especially if wetter conditions come back presumably there would be better conditions for the smelt at that time. But you have to realize this is also a long-term proposition. 

Even if the smelt were declared extinct in the wild, Moyle says it's unlikely to significantly change the way water in the Delta is managed, due to a number of other endangered species. He adds that while some south of the Delta pumping restrictions might be lifted if the smelt were extinct, so few fish have been found in recent years those restrictions aren't a major issue right now.

Joe Moore is the President and General Manager of Valley Public Radio. During his tenure, he's helped lead the station through major programming changes and the COVID-19 pandemic, while maintaining the station's financial health. From 2010-2018 he served as the station's Director of Program Content. In that role, he also served as the host of Valley Edition, and helped launch and grow the station's award-winning local news department. He is a Fresno native and a graduate of California State University, Fresno.
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