Warmer water linked to higher proportion of male flounder

(05/13/19)

 (sole)

If southern flounder (Paralichthys lethostigma) live in warmer water during a critical window of early development, a higher percentage become male -- more than 90 percent in some cases -- research from North Carolina State University found.

Having a high proportion of adult males over the long term could threaten both wild populations and the valuable commercial fishing industry, which depends on larger female flounder.

Field research and lab experiments showed that a four-degree Celsius difference in average water temperature during juvenile development shifted the male-female ratio from about..........................................................


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