Effects of faecal inorganic content variability on quantifying glucocorticoid and thyroid hormone metabolites in large felines: Implications for physiological assessments in free-ranging animals

Patel, Shiv Kumari; Biswas, Suvankar; Goswami, Sitendu; Bhatt, Supriya; Pandav, Bivash; Mondol, Samrat

doi:10.1016/j.ygcen.2021.113833

Cited by 3 publications

References 63 publications

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A systematic literature review: Trends and current state of research on Bengal tiger (Panthera tigris tigris), 2010–2022

Maharjan,

Maraseni,

Allen

et al. 2024

Biodivers Conserv

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Tigers are one of the most recognized and charismatic predator on earth, yet their habitats have declined, their numbers are low, and substantial threats to their survival persist. Although, tiger conservation is high priority globally and tigers are generally considered well studied, there has been no comprehensive global assessment of tiger-related publications aimed at identifying trends, assessing their status and pinpointing research gaps. Utilizing PRISMA framework, we conducted an extensive search across multiple databases, including Scopus, Web of Science, and ScienceDirect, to gather research related to Bengal tigers. Following thorough screening, we selected and evaluated 491 articles published between 2010 and 2022 to address these issues. The results show that publications on Bengal tigers have steadily on rise, with an average of 40 papers/year within this period. We found that most research was focused on the theme of tiger biology. Information on leopards and dholes was also frequently associated with tiger research. The highest number of lead authors originated from India (n = 192), where most research was also conducted. Authors from USA (n = 111) and UK (n = 38) were the next most productive, even though tigers are not found in or anywhere near these countries. We demonstrate that there is only limited amount of transboundary research, and that relatively little tiger research is conducted in the forests beyond protected areas. Similarly, very important but the least studied themes ─Poaching, Population and Socio-culture dimension should be the priority of future research efforts. Additionally, research on tourism, economic aspects and technological inputs are essential for the sustainable conservation of Bengal tigers.

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A systematic literature review: Trends and current state of research on Bengal tiger (Panthera tigris tigris), 2010–2022

Maharjan,

Maraseni,

Allen

et al. 2024

Biodivers Conserv

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The cost of sympatry: spatio-temporal patterns in leopard dietary and physiological responses to tiger competition in Rajaji Tiger Reserve, India

Patel

Ruhela

Biswas

et al. 2022

Preprint

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1. Apex predators have critical roles in maintaining the structure of ecosystem functioning by controlling intraguild subordinate populations. Such dominant-subordinate interactions involve agonistic interactions including direct (death/displacement) or indirect (physiological and/or health implications) impacts on the subordinates. As these indirect effects are often mediated through physiological processes, it is important to quantify such responses for better understanding of population parameters. 2. We used a well-known sympatric large carnivore intraguild system involving tiger (Panthera tigris) and leopard (Panthera pardus) to understand the dietary and physiological responses under a spatio-temporal gradient of tiger competition pressures in Rajaji Tiger Reserve (RTR), a major source tiger population of the western Terai-Arc Landscape, India between 2015-2020. The park provided a natural experimental set-up for tiger competition with the eastern part (ERTR) having high tiger density and the western (WRTR) part with functionally no competition from tigers. 3. We conducted systematic faecal sampling in the winters of 2015 and 2020 from ERTR and WRTR to assess diet and physiological measures. Analyses of leopard-confirmed faeces suggest a dietary-niche separation as a consequence of tiger competition. In 2020, we found increased occurrence of large-bodied prey species without tiger competition in WRTR. Physiological measures followed the dietary responses where leopards with large-sized prey in diet showed higher fT3M and lower fGCM measures in WRTR. In contrast, ERTR leopards showed lower levels of fT3M as well as fGCM in 2020, possibly due to intense competition from tigers. Overall, these patterns strongly indicate a physiological cost of sympatry where competition with dominant tigers resulted in elevated nutritional stress. 4. The combination of the natural habitat providing unique experimental setup, spatio-temporal sampling strategy and multidisciplinary approaches provide critical conservation perspectives for leopards, particularly in the context of recent increase in tiger numbers across India. We recommend expansion of leopard monitoring and population estimation efforts to buffers, developing appropriate plans for human-leopard conflict mitigation and intensive efforts to understand leopard population dynamics patterns to ensure their persistence during the ongoing Anthropocene.

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Seasonal Variation in Fecal Cortisol Levels of Rhesus Macaques Living in Chongzuo, Guangxi

吴

2023

OJNS

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Effects of faecal inorganic content variability on quantifying glucocorticoid and thyroid hormone metabolites in large felines: Implications for physiological assessments in free-ranging animals

Cited by 3 publications

References 63 publications

A systematic literature review: Trends and current state of research on Bengal tiger (Panthera tigris tigris), 2010–2022

A systematic literature review: Trends and current state of research on Bengal tiger (Panthera tigris tigris), 2010–2022

The cost of sympatry: spatio-temporal patterns in leopard dietary and physiological responses to tiger competition in Rajaji Tiger Reserve, India

Seasonal Variation in Fecal Cortisol Levels of Rhesus Macaques Living in Chongzuo, Guangxi

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