Visual pigments and spectral sensitivity of juvenile sutchi catfish (Pangasianodon hypophthalmus Sauvage 1878)
Knowledge on the visual spectral sensitivity of a given fish is important for determi‐ nation of optimal light conditions for improvement of fish rearing in aquaculture. Sutchi catfish (Pangasianodon hypophthalmus Sauvage 1878) is an important freshwa‐ ter fish species in Southeast Asia. The pres...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English English English |
| Published: |
Wiley
2018
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/67611/ http://irep.iium.edu.my/67611/ http://irep.iium.edu.my/67611/ http://irep.iium.edu.my/67611/7/67611%20Visual%20pigments%20and%20spectral%20sensitivity.pdf http://irep.iium.edu.my/67611/8/67611%20Visual%20pigments%20and%20spectral%20sensitivity%20SCOPUS.pdf http://irep.iium.edu.my/67611/19/67611%20Visual%20pigments%20and%20spectral%20sensitivity%20of%20juvenile%20sutchi%20catfish%20WOS.pdf |
| Summary: | Knowledge on the visual spectral sensitivity of a given fish is important for determi‐
nation of optimal light conditions for improvement of fish rearing in aquaculture.
Sutchi catfish (Pangasianodon hypophthalmus Sauvage 1878) is an important freshwa‐
ter fish species in Southeast Asia. The present study aimed to understand the visual
spectral sensitivity of juvenile sutchi catfish through spectrophotometric measure‐
ment of the spectral absorbance of wholemounts of retinae. The spectral absorbance
curves obtained from the spectrophotometric measurement indicated a parabolic
shape. The curves for retinae photo‐bleached with initial flash of blue, green and yel‐
low lights, respectively had a peak at approximately 560 nm, which were the same as
the curve for retinae photo‐bleached with broad wavelength light. On the other
hand, the curve for retinae photo‐bleached with initial flash of red light had a peak
shifted prominently toward shorter light wavelength at approximately 540 nm. This
prominent shift of peak implied that the retinae of juvenile sutchi catfish absorb light
wavelength of red. Therefore, the present results clearly suggested that juvenile
sutchi catfish utilises longer light wavelengths. |
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