Spectral sensitivity in brazilian bioluninescent beetles (1998)
- USP affiliated authors: SOUZA, JOHN MANUEL DE - IP ; VENTURA, DORA SELMA FIX - IP
- Unidade: IP
- Subjects: INSETOS; ELETROFISIOLOGIA
- Language: Inglês
- Abstract: Obtjective: To compare spectral sensitivity, bioluminescence spectra, preferred vegetation and diurnal habits in three Brazilian species of fireflies and one Click Beetle. Method. Individuals of 2 families, Lampyridae (Photinus sp1, Pyrogaster sp1 and Macholampis omissa) and Elateridae (Fulgeochlizus bruchii) were collected in Cotia and Parque Nacional das Emas. Spectral sensitivity curves (S(λ)) were obtained by means of the electroretinogram in response to light pulses at 23 wavelenghts between 320 and 696 nm, under dark and green adaptation. The bioliminescence emission spectra were obtained in a spectrofluorimeter. Results. All S(λ) curves had a main peak in the visible region (560 nm for 3 species and 580 nm for the fourth one, M. omissa) and a secondary one in the UV (340 to 400 nm), wich reversed under green adaptation, confirming the presence of two photoreceptor types. As shown by field observations, two of the lampyrid species are nocturnal, found in dense vegetation and emited green light (560 nm peak). The elaterid species is nocturnal but found in the open field. Its bioluminescence was also green (560 nm). The third lampyrid (M. omissa), which is a crepuscular, open field species, had yellow bioluminescence (572 nm). Conclusion. In all cases S(λ) and bioluminescence emission peaks roughly coincided. For the lampirids, but not for the elaterid, our results support Lall, Seliger an Lloyd's hypothesis that green BL is correlated with nicgt activity while yellow BL is correlated with twilight activity. CNPq, FINEP and FAPESP.
- Título do periódico: Investigative Ophthalmology and Visual Science
- Volume/Número/Paginação/Ano: v. 39, n. 4, p. S974, 1998
- Conference titles: Meeting of the Association for Research in Vision and Ophthalmology
ABNTSOUZA, John Manuel de; CARVALHO, A. A.; VENTURA, Dora Selma Fix; VIVIANI, V R; BECHARA, A B Lail. Spectral sensitivity in brazilian bioluninescent beetles. Investigative Ophthalmology and Visual Science[S.l: s.n.], 1998.
APASouza, J. M. de, Carvalho, A. A., Ventura, D. S. F., Viviani, V. R., & Bechara, A. B. L. (1998). Spectral sensitivity in brazilian bioluninescent beetles. Investigative Ophthalmology and Visual Science. Fort Lauderdale.
NLMSouza JM de, Carvalho AA, Ventura DSF, Viviani VR, Bechara ABL. Spectral sensitivity in brazilian bioluninescent beetles. Investigative Ophthalmology and Visual Science. 1998 ; 39( 4): S974.
VancouverSouza JM de, Carvalho AA, Ventura DSF, Viviani VR, Bechara ABL. Spectral sensitivity in brazilian bioluninescent beetles. Investigative Ophthalmology and Visual Science. 1998 ; 39( 4): S974.
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