Sains Malaysiana 42(6)(2013): 737–742

Morfologi Struktur Halus Organ Deria-elektro (Ampullae of Lorenzini) Ikan Yu

Carcharhinus melanopterus, C. limbatusdan Chiloscyllium griseum

(Morphology of Electrosensory Fine Structure Organ (Ampullae of Lorenzini) of Shark Fishes Carcharhinus melanopterus, C. limbatusand Chiloscyllium griseum)

M. Nor-Fazilla, A. Samat* & A.G. Mazlan

Pusat Pengajian Sains Sekitaran & Sumber Alam, Fakulti Sains & Teknologi

Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor D.E. Malaysia

Diserahkan: 16 Julai 2012/Diterima: 3 Oktober 2012

ABSTRAK

Satu penyelidikan telah dijalankan untuk mengesan struktur halus organ deria-elektro (Ampullae of Lorenzini) padaCarcharhinus melanopterus, C. limbatus dan Chiloscyllium griseum. Organ ini amat peka terhadap beberapa bentuk rangsangan terutamanya untuk mengesan kedudukan mangsa, penentuan arah dan mengawan. Di dalam makmal, suatu bahagian organ deria ini dipisahkan daripada lapisan dermis kepala ikan yu. Pemerhatian dan pengambilan imej struktur organ deria telah dibuat menggunakan mikroskop elektron imbasan (SEM). Imej-imej yang diperoleh jelas menunjukkan organ deria padaCarcharhinus melanopterus, C. limbatus dan Chiloscyllium griseum berbentuk ampulari terkumpul di dalam kluster. Saluran-saluran deria yang menghubungkan ampula dengan pori didapati mempunyai orientasi panjang dan susunan yang berbeza-beza pada spesies yang berlainan.

Kata kunci: Ampula; ikan yu; struktur organ deria

ABSTRACT

A study was carried to observe the morphology of electrosensory fine structure organ (Ampullae of Lorenzini) of Shark Fishes Carcharhinus melanopterus, C. limbatus and Chiloscyllium griseum. This organ is very sensitive to several kinds of stimulus especially with regard to prey location, direction and mating. In the laboratory, a section where the sensory organ can be found was isolated from dermis layer of the sharks’s head. A scanning electron microscope (SEM) was used to observe and produce images of the sensory organ. Images that were obtained from Carcharhinus melanopterus, C. limbatus and Chiloscyllium griseum were in the form of cluster. Sensory canals connecting the ampullae and the pores were found to be different in length and arrangement for different species.

Keywords: Ampullae; sensory organ structure; shark fishes

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*Pengarang untuk surat-menyurat; email: nature5283@gmail.com