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Warming temperatures could result in extinction of sea turtles

Warming temperatures could result in extinction of sea turtles

Washington, DC [United States], June 22 (ANI): Higher temperatures mean that sea turtles could be carried to extinction, according to a new study.

The study by Jacques-Olivier Laloe, University College of Science, argues that warmer temperatures associated with climate change could lead to more female sea turtles and increased nest failure and could have a Negative impact on the turtle population in some regions.

The results were published in the journal Global Change Biology.

-The effects of rising temperatures

High temperatures were first identified as a concern for sea turtle populations in the 1980s, as the temperature at which sea turtle embryos incubate determines the sex of a person, which is known to determine sex dependent on The temperature (SDT).

The pivot at TSD temperature is 29 ° C for males and females occur in equal proportions – greater than 29 ° C, mainly females are produced for less than 29 ° C, are born more males. In the context of climate change and rising temperatures, this means that, in general, sea turtle populations should be skewed in the future.

Although it is known that males can mate with more than one woman during the breeding season, there are very few males in the population who could threaten the viability of the population.

The new study also explored another important effect of rising temperatures: survival in nests. Turtle eggs only develop successfully in a relatively narrow temperature range of about 25 to 35 ° C, so if the incubation temperatures are too low, the embryo does not develop, but if they are too high, the development of failure . This means that if incubation temperatures increase in the future in the context of global warming, more sea turtle nests fail.

Researchers recorded sand temperatures at sea turtle nesting sites of major importance in Cape Verde for 6 years. They also recorded over 3000 nest survival rates to investigate the relationship between incubation temperature and survival of breeders. Using the local climate projections, the research team then modeled the number of turtles that could change in this century’s nesting site.

-Research results

Dr. Laloe stated. “Our results show something very interesting, to some extent, the hottest incubation temperatures benefit the sea turtles because they increase the natural growth rate of the larger population the females occur due to the TDS, which leads to more Eggs on the beaches.

“However, beyond a critical temperature, the natural growth rate of the population decreases due to an increase in mortality from inhalation of temperatures, temperatures are too high and developing embryos do not survive. Long-term development of this sea turtle population. ”

Researchers hope that the number of nests in Cape Verde will increase by 30% by the year 2100, but if temperatures rise, they could start to decline later.

The new study identifies temperature-related mortality of neonates as a significant threat to sea turtles and highlights concern for species with TSD in a warming world. He suggested that to save sea turtle populations around the world, it is essential to control the survival of survival in the coming decades.

Dr. Laloe said, “In recent years, in places like Florida – another important nesting site for sea turtles – more turtle nests have lower survival rates than before they appear. The incubation temperature and the survival rate of the sea turtles in the nest if we want to protect successfully.

“If necessary, conservation measures could be implemented around the world to protect eggs from incubated turtles.These measures could include artificially turtle nests or eggs that move in a protected and temperature controlled hatchery” .

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