Comparison of natural and artificial odor lures for nilgai (Boselaphus tragocamelus) and white-tailed deer (Odocoileus virginianus) in South Texas: Developing treatment for cattle fever tick eradication

Goolsby, John A.; Singh, Nirbhay Kumar; Ortega-S., Alfonso; Hewitt, David G.; Campbell, Tyler A.; Wester, David B.; León, Adalberto A Pérez de

doi:10.1016/j.ijppaw.2017.04.006

Cited by 5 publications

(5 citation statements)

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“…As a member of the family Bovidae, nilgai are closely related to cattle (Goolsby et al, 2017; Singh et al, 2017). Native to India, Pakistan, Bangladesh, and Nepal, nilgai were first introduced as a game species to South Texas in 1924 (Sheffield et al, 1971).…”

Section: Introductionmentioning

confidence: 99%

“…It is thought that the presence of nilgai greatly hindered the control of this outbreak (Olafson et al, 2018). White‐tailed deer can be treated for CFT by medicated feed laced with acaricide (i.e., ivermectin; Goolsby et al, 2017; Pelzel, 2005; Pound et al, 2010). Treated feed is available between February and July, allowing deer at least 60 days off treatment before hunting season begins (USDA‐APHIS, 2017).…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2023

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

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2023

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“…Cattle fever ticks, vectors of the causative agents of bovine babesiosis, are endemic throughout many regions of Mexico [36,37]. This not only affects Mexico's cattle herds but threatens the re-introduction and re-establishment of cattle fever ticks into the southern U.S. through cattle trade and the movement of wildlife alternate hosts across the Mexico-U.S. border [38][39][40]. This system exemplifies the challenges of implementing effective management and control strategies in disease systems that share common geography across international borders [33,41].…”

Section: Introductionmentioning

confidence: 99%

Tick Control in a Connected World: Challenges, Solutions, and Public Policy from a United States Border Perspective

et al. 2022

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Ticks are able to transmit the highest number of pathogen species of any blood-feeding arthropod and represent a growing threat to public health and agricultural systems worldwide. While there are numerous and varied causes and effects of changes to tick-borne disease (re)emergence, three primary challenges to tick control were identified in this review from a U.S. borders perspective. (1) Climate change is implicated in current and future alterations to geographic ranges and population densities of tick species, pathogens they can transmit, and their host and reservoir species, as highlighted by Ixodes scapularis and its expansion across southern Canada. (2) Modern technological advances have created an increasingly interconnected world, contributing to an increase in invasive tick species introductions through the increased speed and frequency of trade and travel. The introduction of the invasive Haemaphysalis longicornis in the eastern U.S. exemplifies the challenges with control in a highly interconnected world. (3) Lastly, while not a new challenge, differences in disease surveillance, control, and management strategies in bordering countries remains a critical challenge in managing ticks and tick-borne diseases. International inter-agency collaborations along the U.S.–Mexico border have been critical in control and mitigation of cattle fever ticks (Rhipicephalus spp.) and highlight the need for continued collaboration and research into integrated tick management strategies. These case studies were used to identify challenges and opportunities for tick control and mitigation efforts through a One Health framework.

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“…White-tailed deer ( Odocoileus virginianus ) maintain CFT populations in the absence of cattle, which compromises eradication efforts [ 7 , 8 ]. Nilgai ( Boselaphus tragocamelus ) is also an alternate host of CFT in the south Texas-Mexico transboundary region [ 9 , 10 ]. Nilgai is an antelope species in the same Bovidae family as cattle, which was introduced to south Texas from India in 1941 [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

Simulated dynamics of southern cattle fever ticks (Rhipicephalus (Boophilus) microplus) in south Texas, USA: investigating potential wildlife-mediated impacts on eradication efforts

Wang

Grant

Teel³

et al. 2021

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Background Cattle fever ticks (CFT), Rhipicephalus (Boophilus) annulatus and R. (B.) microplus, are vectors of microbes causing bovine babesiosis and pose a threat to the economic viability of the US livestock industry. Efforts by the Cattle Fever Tick Eradication Program (CFTEP) along the US-Mexico border in south Texas are complicated by the involvement of alternate hosts, including white-tailed deer (Odocoileus virginianus) and nilgai (Boselaphus tragocamelus). Methods In the present study, we use a spatially explicit, individual-based model to explore the potential effects of host species composition and host habitat use patterns on southern cattle fever ticks (SCFT, R. (B.) microplus) infestation dynamics and efficacy of eradication schemes. Results In simulations without eradication efforts, mean off-host larval densities were much higher when cattle were present than when only white-tailed deer and nilgai were present. Densities in mesquite and meadows were slightly higher, and densities in mixed brush were much lower, than landscape-level densities in each of these scenarios. In eradication simulations, reductions in mean off-host larval densities at the landscape level were much smaller when acaricide was applied to cattle only, or to cattle and white-tailed deer, than when applied to cattle and nilgai. Relative density reductions in mesquite, mixed brush, and meadows depended on host habitat use preferences. Shifting nilgai habitat use preferences increasingly toward mixed brush and away from mesquite did not change mean off-host larval tick densities noticeably at the landscape level. However, mean densities were increased markedly in mesquite and decreased markedly in mixed brush, while no noticeable change in density was observed in meadows. Conclusions Our results suggest that continued integration of field data into spatially explicit, individual-based models will facilitate the development of novel eradication strategies and will allow near-real-time infestation forecasts as an aid in anticipating and preventing wildlife-mediated impacts on SCFT eradication efforts.

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Comparison of natural and artificial odor lures for nilgai (Boselaphus tragocamelus) and white-tailed deer (Odocoileus virginianus) in South Texas: Developing treatment for cattle fever tick eradication

Cited by 5 publications

References 17 publications

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

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

Tick Control in a Connected World: Challenges, Solutions, and Public Policy from a United States Border Perspective

Simulated dynamics of southern cattle fever ticks (Rhipicephalus (Boophilus) microplus) in south Texas, USA: investigating potential wildlife-mediated impacts on eradication efforts

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