Add/remove testosterone in animals

[mark!]

It is well known that, when castrating a rooster it, it won’t be able to exhibit certain male traits (called a ‘capon’). The opposite is also true, when for instance a lioness is injected with testosterone, it will exhibit male traits.

Are there more examples known of comparable results, but with different animals?

 

[jim mcnamara]

Yes. A steer or bullock, castrated male cattle, are the primary source of agricultural beef production. So yes, hormones work as expected in mammals.
So this gives you millions of examples. They are castrated to reduce dangerous-to-humans male behaviors. Horses ditto, the horse is referred to as a gelding.

Higher than normal levels of testosterone in female humans is associated with PCOS. Another 200,000 new cases diagnosed every year. So, lots more examples. https://www.womenshealth.gov/a-z-topics/polycystic-ovary-syndrome

But I fail to see why this might be all that instructive. What are you actually trying to find out?

 

[mark!]

Thanks for you answer @jim mcnamara, but I was actually interested in examples of other animals who physically expressed the traits of the other sex when testosterone was removed (in the case of males) or added (in the case of females). Do you know any?

 

[BillTre]

You might want to look into secondary sex characteristics generally. These are things that differ between the sexes, but are not the sex organisms themselves (the primary sex differences).
Many are under hormonal control.
Some of these hormones act on certain features at specific developmental stages, when certain features are developing, but can have little or no effect later (in adult life) after they have already developed.

 

[mark!]

@BillTre Thanks, that really helped! I didn't know these traits were called 'secondary sex characteristics'.