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Showing 2 results for Disturbance

Ma. Niña Regina M. Quibod, Kit Neil L. Alcantara, Nicole A. Bechayda, Christian Jay C. Estropia, Jonathan B. Guntinas, Mohammad Asar H. Asar Obin, Ryan M. Raymundo, Emmanuel P. Soniega,
Volume 3, Issue 3 (9-2021)
Abstract

Dinagat Islands hold most of the mineral deposits in the Philippines and have been among the largest mining contributors in the country since 1939. Aside from a massive mining industry, logging is also intensive in this group of islands potentially imperiling its remaining biodiversity. This study primarily aims to determine the species composition of terrestrial vertebrates (amphibians, reptiles, birds, mammals) in two study areas categorized as modified habitats (mining area and logging area) in the Dinagat Islands. These wildlife species are important bio-indicators as they show sensitivity of the species to anthropogenic disturbances. Suitable field survey methods were conducted for the taxa established and a quantitative analysis was performed to determine the diversity and similarity of the species between the study areas. A total of 65 species were identified in the two study areas: 33 species were exclusively identified in the mining area, 49 species were exclusively identified in the logging area, and 17 species were found in both study areas. It should be noted that among the 65 species, 41 species are either endemic to Mindanao and/or the Philippines, and two species were endemic to Dinagat Islands. This study also recorded the newly described coral snake endemic to the island, Calliophis salitan Brown, Smart, Leviton and Smith. This study indicates that although Dinagat Islands is modified by anthropogenic activities, the terrestrial vertebrate species are thriving. Intensive survey in other modified habitats in Dinagat Islands is the next-step forward to take into account existing wildlife to improve conservation decisions, planning and management on the islands.

Sujan Bohara, Rajeev Joshi, Bishow Poudel,
Volume 4, Issue 1 (3-2022)
Abstract

The Gharial (Gavialis gangeticus), also known as the gavial or fish-eating crocodile, is a member of the family Gavialidae, is the most threatened of the two species of crocodilians found in Nepal. However, sufficient information on its habitat characteristics influencing population status, distribution, and threats to its existence are lacking. We studied the gharial population in the Narayani River that was carried out in the winter season during December 2019 to April of 2020. During our surveys, a total of 117 gharials were recorded, including an adult male, 56 adult females, 19 sub-adults, 32 immature and nine were unidentified. The gharial census recorded 57 gharials in Sikrauli-Amaltari (Chitwan branch) river section followed by 14 in Sikrauli-Amaltari (Nawalparasi branch), 16 in Amaltari-Baguwan and 30 in the Baguwan-Tribeni River sections. Of 117 individuals, the number of gharials sighted under the direct observation category was 112. The majority of respondents (129 of 140) during our questionnaire, considered gharial as an important species and displayed a favorable attitude towards gharial conservation. This study concludes that the population of gharial in the Narayani River has increased, as the present population is larger than recorded during previous surveys. Finally, regular surveys and monitoring of gharial in the area are recommended to investigate the status of gharial, the prevalence of any threats and disturbance along the habitat of this important species.


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