There is a world somewhere between reality and fiction. Although ignored by many, it is very real and so are those living in it. This forum is about the natural world. Here, wild animals will be heard and respected. The forum offers a glimpse into an unknown world as well as a room with a view on the present and the future. Anyone able to speak on behalf of those living in the emerald forest and the deep blue sea is invited to join.
Regarding testosterone and mane, you are missing my point. Do not think greater testosterone increases hair, it is most probably the opposite. Greater testosterone is linked to hair loss, thus smaller manes, in theory. Note I said Tsavo lions are said to have more testosterone," as in theorized, not fact. Such theory is derived from the seemingly greater aggresson and territoriality.
What do you mean by "see these results"? Are you refer to the excerpt posted? If so, the author published the conclusions of the study derived from statistical data taken by professionals in the field, why should one say the results are meaningless?
I think we're actually on the same page, as you said, "that would specifically disprove this theory that testosterone is the main contributor to mane lentgth or color," but something is unclear in our points. I'll reword my initial point, the study shows that Asiatic lions have no low testosterone problem or genetic botteneck based on an actual study, and thus the twitter post is false.