Sains Malaysiana 38(5)(2009): 619–624

Ciri-ciri Panggilan Katak Borneo (Genus: Hylarana) daripada

Populasi Sarawak, Malaysia

(Characteristics of Bornean Frog (Genus: Hylarana) Calls from the

Sarawak Population, Malaysia)

Ramlah Zainudin¹, Mustafa Abdul Rahman² *, Badrul Munir Mohd Zain¹, Shukor Md. Nor¹,

Norhayati Ahmad¹ & Robert F. Inger³

¹Pusat Pengajian Sains Sekitaran dan Sumber Alam

Fakulti Sains dan Teknologi, Universiti Kebangsaan Malaysia

43600 UKM Bangi, Selangor D. E., Malaysia

²Jabatan Zoologi

Fakulti Sains dan Teknologi Sumber

94300 Kota Samarahan, Sarawak, Malaysia

³Field Museum of Natural History

400 S. Lake Shore Dr, Chicago, IL 60605-2496

Diserahkan: 11 Julai 2008 / Diterima: 14 Januari 2009

ABSTRAK

Rakaman panggilan katak Borneo daripada genus Hylarana telah dijalankan di tujuh lokasi kajian di Sarawak, Malaysia. Sebanyak 12 individu daripada lima spesies katak Borneo telah berjaya dirakam dan dianalisis. Daripada 38 pembolehubah panggilan, hanya 27 daripadanya dapat menerangkan ciri-ciri panggilan daripada katak Hylarana Borneo. Saiz katak jantan mempengaruhi secara signifikan tenaga panggilan antara 90:50% amplitud puncak, tempoh nadi di antara 50%, nisbah tempoh panggilan untuk mencapai setengah modulasi frekuensi dan kadar ulangan not. Saiz katak Hylarana Borneo sedikit mempengaruhi frekuensi asas dan dominan panggilan. Di samping itu, taburan pembolehubah panggilan katak dan dendogram Euclid menyokong identiti taksonomi bagi setiap spesies katak Borneo Hylarana.

Kata kunci: Ciri-ciri panggilan katak; frekuensi panggilan; Hylarana Borneo; kadar ulangan not; tempoh panggilan

ABSTRACT

Recordings of Bornean frog calls from the genus Hylarana were conducted at seven study sites in Sarawak, Malaysia. As many as 12 individuals from five species of Bornean frogs were successfully recorded and analysed. From 38 calling parameters, only 27 could explain call characteristics of the Bornean frogs. The size of male frogs influenced the energy of calling significantly between 90:50% of the peak amplitude, frequency of note between 50%, duration of calling to reach half of the frequency modulation, and the rate of repeated note. The size of Bornean frog showed a marginally significant difference in the basic frequency and dominant calls. Additionally, distribution of calling parameters and Euclid dendogram support taxonomic identifications of each of the Bornean frog species studied.

Keywords: Bornean Hylarana; calling frequency; characteristic of frog calls; duration of call; rate of repeated call

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*Pengarang untuk surat- menyurat; email: zramlah@frst.unimas.my