Detect the ability to change the sex of juveniles in coral fish

According to experts, if the average water temperature increases by 1.5 degrees Celsius, the percentage of female fish born will decrease by 30%.

New research published in Global Change Biology has revealed the mechanism involved in altering sex ratios in the offspring of coral fish.

As a result, experts have shown that parents of coral fish living in a high temperature aquatic environment have the ability to adjust the sex of their offspring.

Lead author of the study, Dr Jennifer Donelson, said: “Understanding the ability of species to respond to and cope with rising environmental temperatures is essential for predicting the biological consequences of global warming.”

Specifically, the researchers found that an increase of 1.5 degrees Celsius in average summer water temperature would reduce the percentage of female fish born by up to 30%.

However, the female sex ratio of the juveniles was restored when the parents were reared at lower temperatures. According to experts, a decrease in the proportion of women could be particularly damaging as population growth will be limited.

Previous research has focused on changes in weather and rearing behavior, and changes in nesting locations in response to global warming. But in this study, we investigated whether this ability to change gender is inherited and affects parenting behavior when determining gender.

Dr Donelson said: “A significant portion of the fish changed the sex ratio at a temperature 3 degrees Celsius above average, and even two generations of fish this change continued.”

“What we do know is that the oceans are warming, and this study is of great importance in reducing the impact of climate change on the oceans,” said Dr Philip Munday of the ARC Center who participated in study. coral fish regulate their sex, we will have new directions of research in the conservation of marine species. “

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