Hello everyone,this week I will thoroughly introduce the phenomena of gender changing.First,after understanding what the Sequential Hermaphroditism is,you may want to ask“Why do creatures have this phenomena? ”.As the topic said,this is a good question,and I would like show some opinion of scientists to find the answer.For the first question：“Why do creatures have this phenomena?”,the public answer is that due to the low population densities,it is hard for some animals to find a partner to mate.By this way,one individual can have higher ability of reproduction.
However,this tremendous change of body cost a lot of time and energy.According to the research done by Yale University and the National Science Foundation,they found that i their theoretical models of the hermaphrodite spend 30 percent of its lifetime in the process of change sex, and still persist in a population.It shows the change of sex is in no way easy.In addition,this strategy will cause lower genetic recombination(遺傳再組合),which may lead to inbreeding depression.
After explaining the answer,It is time to see some interesting examples.This time,I choose this popular fish as our topic.
the clownfish
About its amazing strategy of reproduction,I think everyone can watch this week's video.(I think you may not want to read words now,aren't you?)
This is the end of this week introduction.And next week we will see that the similar phenomena happens on plants.
Reference：1.http://en.wikipedia.org/wiki/Amphiprioninae
3.http://biology.stackexchange.com/questions/5148/why-are-not-all-species-hermaphrodites
This phenomena is really astonishing and interesting, and as the script in Hanzawa Naoki(半澤直樹) says, "it is really hard to survive". Not only do human, but even also marine creatures!!
回覆刪除This is so cool ! Maybe creatures will also think "To be or not to be" as they decide whether they should take a lot of time changing their gender ! To survive and reproduce , they really do a lot of work !
回覆刪除The expression of the clownfish in the first picture is a little stupid but very cute!!
回覆刪除I have learned that this phenomenon happens to animals, but SO AS TO PLANTS!!??
回覆刪除Look forward your next post~!!!
I think phenomena is really amazing because it can change its gender in a short time just to let the gene keep spreading!
回覆刪除thank for your good topic!