@Cassie_Raby These were later followed up and developed by Duboscq et al. (2016) for the louse estimation. Here are my references: Tanaka & Takefushi (1993). https://t.co/Ax02joqgZU Zamma (2002). https://t.co/TpaqMZv3n8 Duboscq (2016). https://t.co/6nVgf1prRr and https://t.co/ZeRiNAvQaf