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271 results on '"Amin, Rajan"'

5. Elephant pathway use in a human‐dominated landscape

Author

Tiller, Lydia, Humle, Tatyana, Amin, Rajan, Humphries, Amie, Seaman, David, Sitati, Noah, Smith, Robert J., Tiller, Lydia, Humle, Tatyana, Amin, Rajan, Humphries, Amie, Seaman, David, Sitati, Noah, and Smith, Robert J.

Abstract

Habitat loss and fragmentation are two of the biggest threats facing wildlife today. Understanding the role of wildlife pathways in connecting resource areas is key for maintaining landscape connectivity, reducing the impacts of habitat loss and helping address human–wildlife conflict. In this study, we used sign surveys and camera trapping to understand the fine scale movement of elephants moving between a protected area and agricultural zone in the Masai Mara, Kenya. We used generalised linear models to determine factors driving high frequency of pathway use by elephants. Our results showed strong seasonal trends in pathway use, with peaks coinciding with the dry season. However, no correlations between rainfall and pathway use were found. Temporal patterns of pathway use indicate that elephants use risk avoidance strategies by moving between the two areas at times of low human disturbance. Spatial analysis revealed that the most frequently used pathways were closer to farms, saltlicks and forest and those that had a higher percentage of forest cover. Our models also showed a positive relationship between pathway use and the number of elephant crop raiding incidents, highlighting that pathways can play a role in human–elephant conflict. As habitat loss continues, pathways may become more important for linking resources. However, they are also likely to facilitate movement into farmland. The results from this study provide an opportunity for planned management activities to ensure connectivity and to mitigated conflict.

Published
2024

11. S1415 Effect of Cystic Fibrosis Transmembrane Conductance Regulator Modulators on Liver Enzymes Among Patients With Cystic Fibrosis: A Systematic Review and Meta-Analysis

Author

Tun, Kyaw Min, primary, Twohig, Patrick, additional, Vongsavath, Tahne, additional, Haque, Lubaba, additional, Lo, Chun-Han, additional, Mukhopadhyay, Dwaipayan, additional, Hansen, Jonathan, additional, Khattak, Adam, additional, Amin, Rajan, additional, Singh, Ashok, additional, and Manne, Vignan, additional

Published
2023
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22. Congenital Riedel's lobe of the liver: A case report.

Author

Patel, Ankoor H., Amin, Rajan, and Abdelsayed, George

Subjects
LIVER diseases, HEPATOMEGALY, LIVER abnormalities, IMMUNOGLOBULIN G, IRRITABLE colon, PORTAL vein, HEPATIC veins
Abstract

Riedel's lobe of the liver is a rare anatomical variant often incidentally found on imaging or through the presence of hepatomegaly on physical examination. While patients are usually asymptomatic, the presentation of this condition can vary, ranging from nonspecific symptoms to more severe issues such as torsion, obstruction, rupture, and bleeding. We present a case of a patient with asymptomatic hepatomegaly who was incidentally found to have Riedel's lobe of the liver, accompanied by an elevated IgG mitochondrial antibody. The range of symptoms associated with this rare anatomical variation underscores its importance in diagnosis and surveillance within this patient population. [ABSTRACT FROM AUTHOR]

Published
2024
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23. Leopard density and the ecological and anthropogenic factors influencing density in a mixed-use landscape in the Western Cape, South Africa.

Author

Hinde, Kyle, Wilkinson, Anita, Tokota, Silindokuhle, Amin, Rajan, O'Riain, M. Justin, and Williams, Kathryn S.

Subjects
ANIMAL population density, CORRIDORS (Ecology), FRAGMENTED landscapes, PROTECTED areas, POPULATION dynamics, LANDSCAPES
Abstract

Large carnivores face numerous threats, including habitat loss and fragmentation, direct killing, and prey depletion, leading to significant global range and population declines. Despite such threats, leopards (Panthera pardus) persist outside protected areas throughout most of their range, occupying diverse habitat types and land uses, including peri-urban and rural areas. Understanding of leopard population dynamics in mixed-use landscapes is limited, especially in South Africa, where the majority of leopard research has focused on protected areas. We use spatially explicit capture-recapture models to estimate leopard density across a mixed-use landscape of protected areas, farmland, and urban areas in the Overberg region of the Western Cape, South Africa. Data from 86 paired camera stations provided 221 independent captures of 25 leopards at 50 camera trap stations with a population density estimate of 0.64 leopards per 100 km2 (95% CI: 0.55–0.73). Elevation, terrain ruggedness, and vegetation productivity were important drivers of leopard density in the landscape, being highest on elevated remnants of natural land outside of protected areas. These results are similar to previous research findings in other parts of the Western Cape, where high-lying natural vegetation was shown to serve as both a refuge and a corridor for leopard movement in otherwise transformed landscapes. Given the low leopard density and the prevalence of transformed land intermixed with patches of more suitable leopard habitat, prioritising and preserving connectivity for leopards is vital in this shared landscape. Ecological corridors should be developed in partnership with private landowners through an inclusive and multifaceted conservation strategy which also incorporates monitoring of and rapid mitigation of emerging threats to leopards. [ABSTRACT FROM AUTHOR]

Published
2023
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31. Evidence of deterrence from patrol data: Trialling application of a differenced‐ CPUE metric

Author

Dancer, Anthony, primary, Keane, Aidan, additional, Beale, Colin M., additional, Dobson, Andrew D. M., additional, Amin, Rajan, additional, Freeman, Robin, additional, Imong, Inaoyom, additional, Jones, Kate, additional, Linkie, Matthew, additional, Long, Barney, additional, Okeke, Francis O., additional, Plumptre, Andrew J., additional, Rowcliffe, J. Marcus, additional, Stokes, Emma J., additional, van der Westhuizen, Elsabé, additional, and Collen, Ben, additional

Published
2022
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40. Gazelle–livestock interactions and impact of water resource development in the Ouadi Rimé–Ouadi Achim Reserve, Chad.

Author

Wacher, Tim, Amin, Rajan, Newby, John, Hatcha, Mahamat Hassan, Abeye, Krazidi, Ali, Habib, Zeubobe Bourtchiakbé, Sadock, and Ndoassal Banlongar, Felix

Subjects
*WATER resources development, *BIODIVERSITY conservation, *WILDFIRES, *GAZELLES, *ANTELOPES
Abstract

The Ouadi Rimé–Ouadi Achim Reserve (Réserve de l'Ouadi Rimé–Ouadi Achim) in central Chad supports large numbers of livestock and rare antelopes, and is the site of ongoing reintroductions of the scimitar-horned oryx Oryx dammah and addax Addax nasomaculatus. We present results of surveys conducted during 2011–2019 to examine patterns of relative abundance and distribution of dorcas gazelles Gazella dorcas , dama gazelles Nanger dama and livestock in relation to each other and to water sources in a 3,500 km2 area in the centre of the Reserve. Dorcas gazelles numbered 7,700–18,000, moving extensively across the area. Livestock varied between c. 2,000 and 68,000 tropical livestock units across surveys, with density doubling in the wet season. Dorcas gazelle distribution was negatively associated with livestock, and livestock density was positively associated with artificial water sources. Dorcas gazelle densities were positively associated with locations where there had been wild fires in the 6 months prior to a survey. Dama gazelles were encountered only 13 times, insufficient to estimate their population size reliably. Opportunistic observations suggest dama gazelles avoid livestock and burnt ground. Our findings highlight the importance of the Reserve. We recommend the designation of a large, well-managed conservation priority zone in the Reserve's core area in which no further development of water resources is permitted. Management of livestock numbers within this zone at or below current levels is essential to integrate national goals for both biodiversity conservation and pastoralism development. [ABSTRACT FROM AUTHOR]

Published
2023
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42. Capacity building for wildlife health professionals: the Wildlife Health Bridge

Author

Meredith, Anna, primary, Anderson, Neil, additional, Malik, Pradeep, additional, Nigam, Parag, additional, Thomas, Alexandra, additional, Masters, Nic, additional, Guthrie, Amanda, additional, Davidson, Hannah, additional, Patterson, Stuart, additional, Amin, Rajan, additional, Skerratt, Lee, additional, Kock, Richard, additional, and Sainsbury, Anthony, additional

Published
2022
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49. Clinicopathologic Features, Treatment Response, and Outcomes of Immune Checkpoint Inhibitor–Related Esophagitis

Author

Panneerselvam, Kavea, primary, Amin, Rajan N., additional, Wei, Dongguang, additional, Tan, Dongfeng, additional, Lum, Phillip J., additional, Zhang, Hao Chi, additional, Richards, David M., additional, Altan, Mehmet, additional, Grivas, Petros, additional, Thompson, John A., additional, Thomas, Anusha S., additional, and Wang, Yinghong, additional

Published
2021
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