jeudi 25 juin 2009

What are the odds?

Pelophylax kl. esculentus and I observe one another

from a short distance


I counted 60 in fewer seconds this morning. They were all gathered together in 3 or 4 groups, making it easy to count them. I read that typically 5 tadpoles will develop for 2,000 eggs laid and fertilized.

60 divided by 5 equals 12. 12 times 2,000 equals 24,000 eggs. A female will lay from 3,000 to 10,000 eggs at a time. So, we are looking at anywhere from 2 to 8 couplings in the basin.

Also possible is that the relatively low numbers of natural predators in a fish-pond-in-a-fountain right outside our front door equals a greater survival rate for the eggs to hatch.

Understand also that I only bothered to count 3 or 4 groups in the basin this morning. That doesn't count everyone else in the other 3/4 to 4/5 of the area.

They are also definitely newly hatched since they measure no more than 6 to 8 mm from snout to the tip of the tail, and they have no rear appendages apparent yet. Those come along before the front legs.

These frogs are going to have to find themselves homes.

And, ah, oui, they are the edible sort.
....


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