Posted on July 31, 2008 in Latest News
Once the researchers began studying the impact of global warming on everything from human health to tourism, it was just a moment of time before they got around to sex. Two biologists from Spain’s Higher Council for Scientific Research (CSIC) has been done on fish at least.
How Environment Determines the Fish-sex:
Alvarez and Piferrer: Made it clear:
Going little further, in a study published in recent edition of Public Library of Science, a scientific journal, Natalia Ospina-Alvarez and Francesc Piferrer explained the mechanism in a detailed manner. They said, “we have demonstrated in laboratory tests that high temperature of water results more male fish.”
Effect of 1.5 Degree Celsius in TSDs:
Piferrer said, “We found that increasing temperature can change the male-to-female ratio in fish that have temperature-dependent sex determination (TSD). But, surprised to see that a rise of just 1.5 degrees Celsius can change the male-to-female ratio from 1:1 to 3:1.”
4 Degree Effect on Pejerrey - Vulnerable females:
“If the more increase in temperatures occur, sensitive fishes can have more risks to throw a greater imbalance in their population. We have found that in the South American ‘Pejerrey’, rise of 4 degrees Celsius can result in a population that is 98% male,” says Alvarez.
What makes the study more significant?
The study alerts the marine ecologists and marine zoologists because, the International Panel on Climate Change (IPCC) predicts that temperatures of ocean-water may rise by 1.5 degrees and even go up a few degrees more by the course of this century.
What it matters in sensitive TSDs?
Piferrer says, “If global warming really does result in a rise of 4 degrees, which is the higher point the IPCC predicts, and if species can’t adapt in time or migrate, then in the most sensitive cases of TSD, we’re looking at extinction.”
Pejerrey - A specimen:
Highlights of the study on Pejerrey:
How many species had their sex-determination mechanism approved?
How many species are True TSDs?
It is more essential to take some steps to protect some most beautiful species of pisces to maintain a proper balance in marine eco-systems.
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