Gender-Changing Fish Are Studied

NEW HAMPSHIRE - A University of New Hampshire scientist is trying to determine what causes sex reversals among black sea bass and how to prevent it.</b> <br><br> Associate Professor of zoology David Berlinsky says the sought-after fish is a good candidate for aquaculture, except for its unpredictable tendency to change gender while in captivity. <br><br> &quot;In the wild, black sea bass are born as females and turn into males at around 2 to 5 years old,&quot; Berlinsky said, but the sex change occurs more quickly in captivity. <br><br> George Nardi, vice president and director of a commercial fish farm in Newington, N.H., says the problem makes breeding the fish a tricky proposition. <br><br> &quot;We invest in our brood stocks, the parents of the young fish, much as a thoroughbred horse farm invests in mares and stallions,&quot; said Nardi. &quot;It doesn&#39;t do us much good if we always have to go out and get new females.&quot; <br><br> <i>Source: New Kerala</i>

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