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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/45983

Title: Differentiation of visual spectra and nuptial colorations of two subspecies (Cyprinoidea: Acheilognathidae) in response to the distinct photic conditions of their habitats.
Authors: Chia-Hao Chang
Yi Ta Shao
Wen-Chung Fu
Kazuhiko Anraku
Yeong-Shin Lin
Hong Young Yan
Contributors: 國立臺灣海洋大學:海洋生物研究所
Keywords: UV reflection pattern
Electroretinogram
Bitterling
Sensory drive
Date: 2015
Issue Date: 2018-04-19T01:25:20Z
Publisher: Zoological Studies
Abstract: Abstract: Background
Vision, an important sensory modality of many animals, exhibits plasticity in that it adapts to environmental conditions to maintain its sensory efficiency. Nuptial coloration is used to attract mates and hence should be tightly coupled to vision. In Taiwan, two closely related bitterlings (Paratanakia himantegus himantegus and Paratanakia himantegus chii) with different male nuptial colorations reside in different habitats. We compared the visual spectral sensitivities of these subspecies with the ambient light spectra of their habitats to determine whether their visual abilities correspond with photic parameters and correlate with nuptial colorations.

Results
The electroretinogram (ERG) results revealed that the relative spectral sensitivity of P. h. himantegus was higher at 670 nm, but lower at 370 nm, than the sensitivity of P. h. chii. Both bitterlings could perceive and reflect UV light, but the UV reflection patterns differed between genders. Furthermore, the relative irradiance intensity of the light spectra in the habitat of P. h. himantegus was higher at long wavelengths (480–700 nm), but lower at short wavelengths (350–450 nm), than the light spectra in the habitats of P. h. chii.

Conclusions
Two phylogenetically closely related bitterlings, P. h. himantegus and P. h. chii, dwell in different waters and exhibit different nuptial colorations and spectral sensitivities, which may be the results of speciation by sensory drive. Sensory ability and signal diversity accommodating photic environment may promote diversity of bitterling fishes. UV light was demonstrated to be a possible component of bitterling visual communication. The UV cue may assist bitterlings in gender identification.
Relation: 54(43)
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/45983
Appears in Collections:[海洋生物研究所] 期刊論文

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