Movement ecology of exotic nilgai antelope: A threat to the re‐emergence of cattle fever ticks in the southern <scp>USA</scp>

Abstract Wildlife plays an important role in the emergence of livestock diseases, and their movements can complicate disease management efforts. One most significant vector‐borne diseases worldwide is bovine babesiosis, spread by cattle fever ticks (CFTs; Rhipicephalus [= Boophilus ] microplus annulatus ). Although CFTs were eradicated from United States 1943, babesiosis are prevalent México. Recently, Texas–México region has been complicated presence free‐ranging, exotic nilgai antelope ( Boselaphus tragocamelus Nilgai abundant this competent hosts for CFTs. The goal study was to better understand space use inform CFT treatment strategies. We analyzed hourly locations 40 GPS‐collared Cameron County, TX, USA, April 2019 September 2020. assigned each a movement behavior using net squared displacement metric. estimated home range sizes at different temporal scales (monthly, seasonally, overall) Brownian bridge models. observed patterns consistent with residency (52.5%), seasonal movers (17.5%), dispersal (5%), unclassified (25%). Resident had average maximum axial distance 7.8 km, while two young females made separate about km within year. Overall, large highly variable ranges: annual median estimate 563 ha (range = 105–1545 ha), males, it 937 221–1602 ha). Peak occurred during crepuscular hours, 57 m/h, 66 m/h. ranges long‐distance have potential overlap multiple ranches, as typical ranch size South Texas 250 6000 ha. more likely maintain local infestations CFT. Dispersal events took place peak tick season, demonstrating aid Understanding these behaviors will help Eradication Program develop efficacious strategies treat nilgai.