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

 

Received: 16 July 2012/Accepted: 3 October 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

REFERENCES

Bodznick, D. & Boord, R.L.1986. Electroreception in Chondrichthyes. Central anatomy and physiology. Electroreception. Springer Handbook of Auditory Research (1): 225-256.

Bullock, T.H. & Heiligenberg, W. 1986. Electroreception. New York: John Wiley & Sons.

Bullock. T.H. 1982. Electroreception. Annual Review in Neuroscience 5: 121-170.

Compagno, L.J.V. 1984. Sharks of the World. FAO Species Catalogue. Vol.4. Rome: Food and Organization of the United Nations.

Jørgensen, J.M. 2005. Morphology of electroreceptive sensory organs. In Electroreception, edited by Bullock, T.H., Hopkins, C.D., Popper, A.R. & Fay, R.R. New York: Springer. Kajiura, S.M. 2000. Head morphology and electrosensory pore distribution of Carcharhinid and Sphyrnid sharks. Environmental Biology of Fishes 61: 125-133.

Kalmijn, A.J. 1971. The electric sense of sharks and rays. Journal of Experimental Biology 55: 371-383.

Kalmijn, A.J. 1988. Detection of Weak Electric Fields. Sensory Biology of Aquatic Animals.New York: Springer-Verlag.

Murray, R.W. 1960. Electrical sensitivity of the ampullae of Lorenzini. Nature 187 (4741): 957.

Obara, S. & Bennet, M.V.L. 1972. Mode of operation of Ampullae of lorenzini of the skate, Raja. The Journal of General Physiology 60: 534-557.

Pollack, G.H. 2001. Cells, Gels and the Engines of Life. Seattle: Ebner & Sons.

Raschi, W.G. 1978. Notes on the gross functional morphology of the ampullary system in two similar species of skates, Raja erinaceaand R. ocellata. Copeia 1978: 48-53.

Tricas, T.C. & New, J.G. 1998. Sensitivity and response dynamics of electrosensory primary afferent neurons to near threshold fields in the round stingray. Journal of Comparative Physiology (A) 182(1): 89-101.

Waltman, B. 1966. Electrical properties and fine structure of the ampullary canals of Lorenzini. Acta Physiologica Scandinavica (Suppl.) 264: 1-60.

 

 

*Corresponding author; email: nature5283@gmail.com

 

 

previous