Smallmouth Salamander - Ambystoma texanum
Unisexual Hybrid Salamander - Ambystoma sp.
Unisexual hybrids can be diploid, triploid, or even tetraploid. These animals share the genotypes of the Blue-Spotted, Jefferson's, Smallmouth, and occasionally Eastern Tiger Salamander. These unisexually female salamanders migrate to breeding pools with other salamanders on warm, rainy spring nights where they utilize sperm from males of other Ambystoma species to fertilize their eggs. The sperm of the males stimulates unreduced eggs to develop, resulting in clones of the female, this is similar to a process known as gynogenesis. It is also possible for the genome to be replaced or for the number of chromosomes in the offspring to be increased. The genetics of these salamanders is still undergoing study by many researchers. Here's a few other animals that showed up this past weekend.
Spotted Salamander - Ambystoma maculatum
Eastern Tiger Salamander - Ambystoma tigrinum
That's all for now. Until then, happy herping!
Nice post! Is it common for maculatum in Michigan to have darker, almost orange spots, on the head? It's a southern trait but I guess I've never noticed it on photos from the northern midwest
ReplyDeleteAt least in southern Michigan, a lot of the individuals I've seen do have that trait. Not so much in the northern part of the lower Peninsula though.
ReplyDelete4-5 years ago I found a smallmouth salamander while
ReplyDeletescouting the property I deer hunt. It was in Concord,mi. I'm 100% sure that it was a smallmouth salamander.
We just found a small mouth on the apron of our driveway tonight. I have him in a bug catcher to show the kids on the morning before letting him go. We're in Lapeer.
ReplyDelete