Complex sentence: Little is known about Čabulītis youth-only that the alligators used to fight and Čabulītis bit one of the females in tail, apparently alligators mated as well, however eggs were not fertile.
Split into simpler sentences: Little is known about Čabulītis youth-only that the alligators used to fight and Čabulītis bit one of the females in tail. Apparently the alligators mated as well, but the eggs were not fertile.