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The Maryland Department of Natural Resources announced results of the most recent juvenile striped bass survey, which tracks the reproductive success of the state fish in the Chesapeake Bay. The 2020 young-of-year striped bass index is 2.5, below the long-term average of 11.5.

Although the size of the striped bass population has decreased recently, the number of mature fish is not believed to be a limiting factor in reproduction. Striped bass is known for highly variable annual reproduction that is often influenced by environmental factors. Other species with spawning strategies similar to striped bass such as white perch, yellow perch, and river herring also experienced lower reproductive success. 

Maryland DNR scientists examine juvenile striped bass for the annual index, before carefully releasing them back to the water.

“We have implemented sound conservation measures to enhance the striped bass population in recent years and will continue to monitor and protect this important and iconic resource,” said Bill Anderson, Department of Natural Resources assistant secretary for Aquatic Resources.

The mild winter appears to have favored species that spawn in the fall off the coast, such as Atlantic croaker and spot. The survey documented a resurgence in an abundance of these sought-after species. Spot abundance was the highest since 2010 and Atlantic croaker abundance was the highest since 1998.

The Department of Natural Resources has monitored the annual reproductive success of striped bass in Maryland’s portion of Chesapeake Bay since 1954. During the survey, biologists collected more than 36,000 fish of 59 different species, including 327 young-of-year striped bass.  

Twenty-two survey sites are located in four major spawning areas: the Choptank, Nanticoke, and Potomac rivers and the Upper Chesapeake Bay. Biologists visit each site three times per summer, collecting fish with two sweeps of a 100-foot beach seine net. The index represents the average number of recently hatched striped bass, commonly called rockfish, captured in each sample.

The Virginia Institute of Marine Science conducts a similar survey in the southern portion of Chesapeake Bay.


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