Jeffrey Beck

and 1 more

Understanding the conservation status of species is imperative to stem global declines. To better inform conservation, we summarize the global conservation status of New World (Family Odontophoridae) and Old World (Family Phasianidae) true quail species. We used data from the 2021 International Union for Conservation of Nature (IUCN) Red List of Threatened Species and IUCN list of threatened categories to conduct our research. We summarized information from the Red List relative to general habitat use, native geographic region, extent/quality of habitat, primary and secondary threats to the population, and reported population trends. We also conducted a literature review for species/genus/families of true quails across a 20-year (2000–2020) timescale to summarize available information. Native ranges for the 47 species of quail include 21 in South America, 14 in North America, nine in Asia, three in Australia, and two in Africa. The common quail (Coturnix coturnix) is migratory and occurs in Africa, Asia, and Europe. According to the 2021 IUCN assessment, 34 (72.3%) species were identified as Least Concern, one (2.1%; Manipur bush quail [Perdicula manipurensis]) was Endangered, and one (2.1%; New Zealand quail [Coturnix novaezelandiae]) is Extinct. Five species each (21.3% total) were recognized as Vulnerable or Near Threatened, and one (2.1%; Himalayan quail [Ophrysia superciliosa]) was Critically Endangered. The quality and quantity of habitats are declining for 11 (23.4%) true quail, with IUCN noting habitat quality and quantity as “unknown” for the remaining 36 (76.6%) species. Threats to most populations are unknown, but intensive agricultural and biological resource use affected half of true quail species. Coturnix and Cytonyx were the most extensively studied genera, composing 47.6–49.2% and 34.0–36.8% of studies within half decades from 2000–2020, respectively. Our review revealed the need for more attention to true quail from researchers and practitioners alike.

Imran Siddiqui

and 4 more

Prey abundance is recognized as a key component for the recovery of the tiger ( Panthera tigris) population. Long-term monitoring is imperative for understanding the trends in prey populations and helps assess the management interventions. We provide data on the tiger prey populations that include chital ( Axis axis) , chousingha ( Tetracerus quadricornis) , nilgai ( Boselaphus tragocamelus), sambar ( Rusa unicolor), and wild pig ( Sus scrofa) from Kawal Tiger Reserve (KTR) for a period between 2010–2022. We conducted our study using 28 permanently marked transects in a systematic survey design with a random start. The trends in the principal tiger prey populations were also compared across the years. The chital population has shown a significant rise but sambar, nilgai, and chousingha populations were consistent with a slight increase. The wild pig population was typically showing extreme fluctuations. We used the prey-biomass and prey-abundance-based models to predict the ecological carrying capacity of tigers. Based on the prey availability at KTR, we predicted that the reserve could potentially support more than 30 tigers in its core area. However, in the past 10 years, tigers have failed to recolonize KTR despite the movement of 11 tigers from the source sites of which only 2 were females. Therefore, we suggest that establishing a breeding tiger population may need restocking, focusing on the females, and maintaining connectivity with the tiger landscapes in neighbouring Maharashtra State having Protected Areas with a healthy source population. After being declared a tiger reserve in 2012, the level of protection in KTR has increased but the anthropogenic stressors are yet to be fully dealt with. Our long-term monitoring study has systematically documented the trajectory of prey populations and we predicted a significant increase in the carrying capacity of tigers in the Core of KTR.