Crossing is the fall?

[sde]

Hi all,

so I was wondering why T. Granulosa cross the roads two times in a year?
I know that they cross to the breeding grounds in the spring but they cross again in the fall, also towards the breeding grounds. I don't know why?
Also, the little new morphs cross during or throughout this time as well. I read in a book about this as well, but it did not say why they cross in the fall. I don't get it, why would they cross seemingly for no reason? -Seth

 

[EasternNewtDude]

theres a breeding season in the fall to.

 

[sde]

They breed in the spring and fall? Cause I know they breed in the spring here, so they also breed in the fall?

 

[Kaysie]

They might, but there are 2 issues at hand:

1.) if you look at the precipitation and photoperiod in the fall, it's basically the same as spring, triggering a mini-migration, and

2.) All the young-of-the-year and the juveniles that migrated but didn't breed are migrating out of the ponds.

 

[sde]

Yes I know that the newly-morphs are migrating away from the breeding ponds, but I just didn't get why the adults where migrating to the breeding ponds.
This makes sense, what you say about the spring and the fall, but do you think they are confused about the season? I am confused about the motivation behind the crossing, I just don't see why they would cross and then cross back for no reason.

 

[sde]

I am going to revive this with a question.

So, recently the adults and juveniles have started crossing again. The juveniles are crossing from the breeding grounds after morphing, but I have a suspicion that there is a double breeding season. See, almost all of the adults that are crossing are males, which is the same as it is in the spring, the males cross first, and then the females. I have now found three adult males alive, and probably five or more squished, as well as two females squished. However the males don't show any signs of beginning to get into breeding dress, whereas in the spring some of the males were in almost full breeding dress. The weather is pretty much the same.
I am wondering if it is possible for there to be a double breeding season. Maybe some breed in the fall and others breed in the spring? I would just go down to the breeding marsh, but the best area is private and I cant find them at the public land.

Has anyone heard or know of a double breeding season? -Seth