Question

1. what is the approximate pivotal temperature, based on your data?
2. at what temperature would 20% of the nest be males?
3. assuming the nest temperature would have remained constant on the beach over the incubation period, what ratio of females to males do you expect would have been born on the beach (in the areas where the eggs remained, and were not collected for experimentation)?

there is much discussion on the effect that region temperatures of the both the ocean and atmosphere, might have on sea turtle hatchling sex ratios.

1. what effect would you expect rising temperatures on beaches to have on sea turtle populations?
2. how might this negatively affect a population of sea turtles?
3. some researchers believe that the characteristic of temperature - dependent sex determination might actually have a positive effect on future populations. it is even thought that this attribute may have possibly played a role in the survival of some reptile species through mass extinction events. how might turtles benefit from having a higher ratio of females being born, in response to climate change?
4. during mating season, males may mate multiple times, with different females, throughout the mating season. oftentimes, there are several males making attempts to mate with a female, and the process becomes a competition of strength and size. does this information support what you answered above?
5. in what other way might the nesting of sea turtles be affected by climate change?

Explanation:

These questions pertain to the biological aspects of sea - turtles, such as their sex - determination based on temperature, population impacts due to climate change, and mating behaviors. Sea - turtles are living organisms, and these topics fall under the study of Biology.

Answer:

1. Without specific data, it's impossible to determine the approximate pivotal temperature. This is the temperature at which the sex ratio of hatchlings starts to shift.
2. Similarly, without data, we can't say at what temperature 20% of the nest would be males. In sea - turtles, sex is often determined by incubation temperature.
3. Without data on the constant sex - ratio temperature and incubation conditions, we can't calculate the expected ratio of females to males.
4. Rising beach temperatures could lead to a higher proportion of female sea - turtle hatchlings due to temperature - dependent sex determination. This could skew the sex ratio in populations, potentially leading to reduced genetic diversity and long - term population decline.
5. A skewed sex ratio (more females) could lead to difficulties in finding mates, especially if the number of males is too low. It could also put more pressure on males to reproduce, and if males are over - utilized, it could impact their health and survival rates.
6. A higher ratio of females being born in response to climate change could potentially allow sea - turtle populations to adapt. More females could mean more eggs being laid, increasing the chances of population survival. However, it also depends on other factors like male availability and environmental conditions for egg survival.
7. The mating behavior where males compete for females might seem to suggest that a lower number of males could still be sufficient for reproduction as long as they are strong and healthy. But if the sex ratio becomes too skewed towards females, it could still pose challenges as there might not be enough males to meet the reproductive needs of all females.
8. Climate change could cause sea - level rise, which could flood sea - turtle nesting sites. It could also change beach temperatures and humidity levels, affecting egg development and survival. Additionally, extreme weather events like storms could destroy nests and disrupt the nesting process.