Climate Change Could Affect Animal Sex Ratiosâand That Might Lead to Species Extinctions
Jacques-Olivier LaloÃ«
However  it is not yet clear how any female bias will affect overall loggerhead population numbers  says  Dr. Jacques-Olivier LaloÃ«  a researcher in turtle sex ratios from Swansea University .
 He  points out that female turtles may be able to cope with a shortage of males because they are able to store sperm. This means they can go long periods of time without encountering a male and still reproduce regularly.
On top of this  males are able to mate with multiple females during one season  meaning there does not necessarily need to be equal numbers of males and females for populations to thrive  says  LaloÃ« .  He  tells Carbon Brief:
But  at some point  turtle populations will reach a âtipping pointâ where there will not be enough males for mating to take place as normal and turtle populations could quickly collapse  says  LaloÃ« .
However  if global CO2 emissions continue to rise unchecked  as in the RCP8.5 emissions scenario  then this tipping point could happen earlier   LaloÃ«  adds.
A future shortage in females could very rapidly lead to a decline in reproduction and population collapse   LaloÃ«  says. âA surplus of males could potentially cause a much bigger problem than a surplus of females.â
However  it is not yet clear how any female bias will affect overall loggerhead population numbers  says   [TGT] 
 [TGT]   points out that female turtles may be able to cope with a shortage of males because they are able to store sperm. This means they can go long periods of time without encountering a male and still reproduce regularly.
On top of this  males are able to mate with multiple females during one season  meaning there does not necessarily need to be equal numbers of males and females for populations to thrive  says  LaloÃ« .  He  tells Carbon Brief:
But  at some point  turtle populations will reach a âtipping pointâ where there will not be enough males for mating to take place as normal and turtle populations could quickly collapse  says  LaloÃ« .
However  if global CO2 emissions continue to rise unchecked  as in the RCP8.5 emissions scenario  then this tipping point could happen earlier   LaloÃ«  adds.
A future shortage in females could very rapidly lead to a decline in reproduction and population collapse   LaloÃ«  says. âA surplus of males could potentially cause a much bigger problem than a surplus of females.â