What do you do with these thousands of offspring? I cant believe this is YOUR offspring. Incredible in a good way. Im still very skeptical of the outdoor raising unless its in greenhouse setting. Only thing is melanistic animals is a adaptation for the animal. For example the black panther. This was an adaptation that the panther had to be able to hunt more efficiently at night.
What your doing is not adaptive its being forced by selective breeding.
Typically, adaptive melanism is a heritable dominant gene which is entirely or nearly expressed in the pheonotype is responsible for the excessive amount of melanin. I have been doing a fair amount of research on this. I also found out this is found in humans. Recently watched a documentary that some if not all white people originated from Africa and had a black skin pigmentation. Ill dig up the documentary for you. Its some really neat stuff! Human skin is repeatedly exposed to UV radiation that influences the function and survival of many cell types and is regarded as the main causative factor in the indication of skin cancer. Some believe that melanin somehow blocks the vitamin D absorption. However evidence about this is not clear. Ive learned that melanin has several physiological roles in maintaining health, such as the synthesis of vitamin D. (Very important to frogs), which is the primary determinant of the degree of skin pigmentation and protects the body from harmful UV Radiation. However since this individual was bred with 2 melanistics already. Id love to see how these guys survive. I already know off hand the black (some call purple) agalychnis are a stronger gene just based on science and other keepers of the black morph. However I'm not sure sure of this new gene you made. I think to much of a good thing may be a very BAD thing, however your going to be the first person to find out on this specific species. I applaud you on getting that opportunity. Please keep us updated on this. Id love to learn about this and your processes of natural selection. You earn a reputation bar for this. Look forward to hearing about your work.

Very Respectively,

Corey