Year 2020, Volume 13 , Issue 1, Pages 1 - 8 2020-04-15

Native and invasive alien anuran species in urbanized areas in Davao City, Philippines, with preliminary study of feeding biology

Jacky Roselle GERSAVA [1] , Reynaldo ABAD [2] , Fritzie CAMİNO [3] , Mae RESPONTE [4] , Marion John Michael ACHONDO [5] , Lief Erikson GAMALO [6]

This article presents the anuran species in urbanized areas, diet overlaps between native and invasive alien anuran species, and its implications on conservation and ecological health in urban environment. Visual encounter technique following the road as a transect was done to determine the diversity of anurans, and stomach content extraction was employed to analyze its diet composition. Results revealed a very low anuran diversity (Shannon-Weiner; 1.165), which is dominated by invasive alien anuran species. Jackknife 1 species richness estimator indicated that 77-100% of the anuran species in the area were already detected which includes three invasive; Rhinella marina (Linnaeus, 1758), Kaloula pulchra Gray, 1831, Hoplobatrachus rugulosus (Wiegmann, 1834), and two natives; Polypedates leucomystax (Gravenhorst, 1829), Limnonectes leytensis (Boettger, 1893). Additionally, assessing the diet of 33 randomly selected anuran samples revealed that Formicidae dominated their food item. Invasive anurans also showed more diverse diet composition compared to native frogs, in which diet overlaps were observed. In conclusion, the study supports the idea that urbanization decreases anuran diversity and supports the dominance of invasive anurans which compete for food with their native and endemic counterparts. Additionally, it is important to manage invasive anurans that dominates urban ecosystem which might affect the native and endemic species in the area and possibly in nearby pristine environment.
diet composition, diversity, frogs, invasive alien species, roadkills, urban environment
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Primary Language en
Subjects Biodiversity Conservation
Journal Section Research Articles

Orcid: 0000-0003-0392-5730
Author: Jacky Roselle GERSAVA
Institution: University of the Philippines Mindanao
Country: Philippines

Orcid: 0000-0002-2136-2612
Author: Reynaldo ABAD
Institution: Davao Doctors College
Country: Philippines

Orcid: 0000-0003-2489-4064
Author: Fritzie CAMİNO
Institution: University of the Philippines Mindanao
Country: Philippines

Orcid: 0000-0001-5921-6146
Author: Mae RESPONTE
Institution: University of the Philippines Mindanao
Country: Turkey

Orcid: 0000-0002-5438-0585
Author: Marion John Michael ACHONDO
Institution: University of the Philippines Mindanao
Country: Philippines

Orcid: 0000-0002-1353-0591
Author: Lief Erikson GAMALO (Primary Author)
Institution: University of the Philippines Mindanao
Country: Philippines


Application Date : April 30, 2020
Acceptance Date : May 12, 2020
Publication Date : April 15, 2020

APA Gersava, J , Abad, R , Cami̇no, F , Responte, M , Achondo, M , Gamalo, L . (2020). Native and invasive alien anuran species in urbanized areas in Davao City, Philippines, with preliminary study of feeding biology . Biyolojik Çeşitlilik ve Koruma , 13 (1) , 1-8 . Retrieved from