In this July 30, 2015 file photo, a healthy sea star is seen under a magnifying glass during a survey to determine the health of local sea star populations at Camano Island State Park in Washington state. (Ian Terry/The Herald via AP, File/AP Photo/Elaine Thompson, File)
Baby starfish are back!
May 16, 2016
Droves of baby starfish are returning to Oregon and Northern California's shores. A wasting disease destroyed whole populations of the creatures. This occurred over the past two years along the West Coast.
Data was collected by Oregon State University researchers. The research shows a record number of baby starfish. They also are called sea stars. They survived the summer and winter of 2015. This was reported by the Eureka Times Standard newspaper.
"When we looked at the settlement of the larval sea stars on rocks in 2014 during the epidemic, it was the same or maybe even a bit lower than previous years," Oregon State University marine biology professor Bruce Menge said in a statement.
But a few months later, the number of juveniles was off the charts. It was "higher than we'd ever seen. As much as 300 times normal."
A similar increase was found at sites just north of Trinidad, California. That is near Patrick's Point State Park. A baby starfish boom also was noted in the summer of 2014. It was near Santa Cruz.
A virus killed millions of starfish on the Pacific Coast from Southern California to Alaska. It caused them to lose their limbs. Eventually they would break down into slime and piles of tiny bones.
The cause of the outbreak remains unclear. Some have hypothesized it to be abnormally warm waters in the Pacific Ocean. The warmer waters have wreaked havoc on marine ecosystems. This has been going on for the past two years.
Humboldt State University Marine Lab Director Brian Tissot disagrees with that hypothesis. That is because the virus spread during colder months. It didn't expand as much during the abnormally warm 2015.
"There is no clear environmental cue," Tissot said. He added the deadly wasting disease has gone down in intensity. But he said it remains present.
Experts say it's encouraging to see the large number of baby starfish. But they believe disease, competition and environmental factors make survival of the starfish difficult.
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CRITICAL THINKING QUESTION
Why don't we know what was killing the starfish?
Write your answers in the comments section below