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Prey specialization and diet of frogs in Borneo
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för ekologi, miljö och geovetenskap.
2015 (Engelska)Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
Abstract [en]

Earlier studies of the diet of frogs indicate that most adult frogs are mainly insectivorous. Overall, frogs are viewed more as generalists than specialists in terms of their diet. However, despite earlier studies, there are still gaps in our knowledge regarding what frogs tend to eat and the degree of specialization. The aim of this study was to investigate the diet choice of frogs in a tropical ecosystem. The present study was conducted in a well-known hotspot for frogs with 66 of the 156 known frog species in Borneo found in a protected area comprising of primary rainforest.

 

Frogs were caught in the field and their stomachs were flushed. The stomach content was retrieved, sorted to prey categories, and the diet analysed. In addition, the frogs were identified to species level. The frogs belonged to five families: Bufonidae, Dicroglossidae, Megophryidae, Microhylidae and Ranidae. My results show that the most common food source was ants, which constituted 63.7 % of the total food for all studied frog families. Termites, beetles and spiders made up 11.7 %, 4.2 % and 2.8 % of the total prey, respectively. The results from the analysis of Shannon’s diversity index supported two diet specialist families, the Bufonidae and Megophridae, which had a significantly lower mean diversity index compared to the generalist Dicroglossidae. To better reveal differences in frog’s diet in this ecosystem, further studies using larger sample size are needed.

 

 

 

Ort, förlag, år, upplaga, sidor
2015. , s. 16
Nyckelord [en]
specialization, frogs, diet, stomachflushing
Nationell ämneskategori
Ekologi
Identifikatorer
URN: urn:nbn:se:umu:diva-102020OAI: oai:DiVA.org:umu-102020DiVA, id: diva2:806539
Utbildningsprogram
Kandidatprogrammet i biologi och geovetenskap
Handledare
Examinatorer
Tillgänglig från: 2015-04-20 Skapad: 2015-04-20 Senast uppdaterad: 2015-04-20Bibliografiskt granskad

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Institutionen för ekologi, miljö och geovetenskap
Ekologi

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