Abundance and age structure of critically endangered long-billed (Gyps indicus) and white-rumped (G. bengalensis) vultures at the breeding colonies of Kaghaznagar Forest Division and its adjoining areas in the Deccan Plateau, India

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dc.contributor.authorRAVIKANTH, MANCHIRYALAen_US
dc.contributor.authorBASKARAN, NAGARAJANen_US
dc.date.accessioned2024-11-30T11:24:42Z
dc.date.available2024-11-30T11:24:42Z
dc.date.issued2024-05
dc.description.abstractKaghaznagar and Sironcha Forest Divisions in the Deccan Plateau of India support large breeding colonies of critically endangered species of long-billed Gyps indicus (LBV) and white-rumped G. bengalensis (WRV) vultures. To assess their abundance and age-structure, that are important population parameters, they were surveyed every month at their breeding colonies; LBV at Palarapu cliff during 2010–2021 and Lakkameda cliff during 2015–2021, and WRV at Dechilpeta during 2014–2021. Breeding colonies of LBV supported a mean of 32 ± 1.3 individuals during 2015–2021. Although its number increased from 34 individuals in 2015 to 42 in 2017, it declined significantly to 10 in 2021. In contrast, WRV with a mean of 49 ± 3.35 individuals between 2014 and 2021 increased from 22 to 66. Data on the population structure show that adults constitute bulk of the population in both LBV (78 ± 1.2%) and WRV (80 ± 2.1%) with a low proportion of young age-classes of sub-adults, juveniles and chicks. With a declining trend and low proportion of young-age classes, the LBV breeding colonies are likely to decrease over time. Although WRV showed an increasing trend during the study period, the high adult proportion (80%) cannot guarantee its sustained growth.en_US
dc.identifier.affiliationsMammalian Biology Lab, Department of Zoology and Wildlife Biology, A.V.C. College (Affiliated to Bharathidasan University, Tiruchirappalli), Mannampandal, Mayiladuthurai 609 305, Indiaen_US
dc.identifier.affiliationsMammalian Biology Lab, Department of Zoology and Wildlife Biology, A.V.C. College (Affiliated to Bharathidasan University, Tiruchirappalli), Mannampandal, Mayiladuthurai 609 305, Indiaen_US
dc.identifier.citationRAVIKANTH MANCHIRYALA, BASKARAN NAGARAJAN. Abundance and age structure of critically endangered long-billed (Gyps indicus) and white-rumped (G. bengalensis) vultures at the breeding colonies of Kaghaznagar Forest Division and its adjoining areas in the Deccan Plateau, India. Journal of Biosciences. 2024 May; 49: 1-10en_US
dc.identifier.issn0250-5991
dc.identifier.issn0973-7138
dc.identifier.placeIndiaen_US
dc.identifier.urihttps://imsear.searo.who.int/handle/123456789/237976
dc.languageenen_US
dc.publisherThe Indian Academy of Sciencesen_US
dc.relation.volume49en_US
dc.source.urihttps://doi.org/10.1007/s12038-024-00438-7en_US
dc.subjectAged-population trenden_US
dc.subjectcritically endangered vultureen_US
dc.subjectnumber at breeding coloniesen_US
dc.subjectpopulation declineen_US
dc.titleAbundance and age structure of critically endangered long-billed (Gyps indicus) and white-rumped (G. bengalensis) vultures at the breeding colonies of Kaghaznagar Forest Division and its adjoining areas in the Deccan Plateau, Indiaen_US
dc.typeJournal Articleen_US
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