Every year, Christmas Island in the Pacific is overrun with over 120 million red crabs (GecarcoideaÂ natalis) moving...

70.2K

Verified Solution

Question

Biology

Every year, Christmas Island in the Pacific is overrunwith over 120 million red crabs(GecarcoideaÂ natalis) moving across land betweentheir breeding ground and habitat and towards the water tospawn.
Write and explain at least two alternate hypothesesfor each of the following questions, and propose research to testyour hypothesis. For your proposed research for each section,explain whether your work will be experimental, correlational, orconceptual and be sure to note what the strengths and weaknesses ofyour approach might be. Make sure that you explain you logicwell.

a. What might be the adaptive benefits of everyonemigrating at the same time?Â (think about what happens toindividuals that miss the event, or travel separately)

b. In this species males leave their burrows andarrive at the beach a couple of days before the females. Why mightthey do this?

c. How do they coordinate such that they migrate atthe same time? (what type of cues might say it is time to leave,what physiological mechanisms might be at play?)

d. How do the crabs know where to go? (think aboutnavigation and whether components might be learned orinherited).

Answer & Explanation Solved by verified expert

3.9 Ratings (408 Votes)

Group migration in Fiddlers crab can be attributed to safety and competition Red crab migrate to sea shore so that males can copulate with females While moving in large group ensure that each male has higher chances of copulating with females which will be less if it would have been a secluded event Another aspect of group See Answer

Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:

Unlimited Question Access with detailed Answers
Zin AI - 3 Million Words
10 Dall-E 3 Images
20 Plot Generations
Conversation with Dialogue Memory
No Ads, Ever!
Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!

Become a Member