Hormone analysis showed that the calling behaviour of copulating females was unrelated to their fertile period and likelihood of conception.

• 因此，嚎春可能是雌猩猩用以向高级别雄性展示自己的有效策略，在混淆其配偶的真实身份后，利于其在以后获得源自这些高阶层人物的支持。