[11] Whitmore, D., Foulkes, N.S. and Sassone-Corsi, P. (2000) Light acts directly on organs and cells in culture to set the vertebrate circadian clock. Nature 404, 87–91.

[12] Plautz, J.D., Kaneko, M., Hall, J.C. and Kay, S.A. (1997) Independent photoreceptive circadian clocks throughout Drosophila. Science 278, 1632–1635.

[13] Doyle, S. and Menaker, M. (2007) Circadian photoreception in vertebrates. Cold Spring Harb. Symp. Quant. Biol. 72, 499–508.

[14] Maywood, E.S. et al. (2007) Genetic and molecular analysis of the central and peripheral circadian clockwork of mice. Cold Spring Harb. Symp. Quant. Biol. 72, 85–94.

[15] Korf, H.W., Von Gall, C. and Stehle, J. (2003) The circadian system andmelatonin: lessons from rats and mice. Chronobiol. Int. 20, 697–710.

[16] Korf, H.W., Schomerus, C. and Stehle, J.H. (1998) The pineal organ, its hormone melatonin, and the photoneuroendocrine system. Adv. Anat. Embryol. Cell Biol. 146, 1–100.

[17] Falcon, J., Besseau, L., Sauzet, S., Fuentes, M. and Boeuf, G. (2007) Melatonin and neuroendocrine regulations in fish. J. Soc. Biol. 201, 2129.

[18] Falcon, J., Gothilf, Y., Coon, S.L., Boeuf, G. and Klein, D.C. (2003) Genetic, temporal and developmental differences between melatonin rhythm generating systems in the teleost fish pineal organ and retina. J. Neuroendocrinol. 15, 378–382.

[19] Gothilf, Y., Coon, S.L., Toyama, R., Chitnis, A., Namboodiri, M.A. and Klein, D.C. (1999) Zebrafish serotonin N-acetyltransferase-2: marker for development of pineal photoreceptors and circadian clock function. Endocrinology 140, 4895–4903.

[20] Ziv, L., Tovin, A., Strasser, D. and Gothilf, Y. (2007) Spectral sensitivity of melatonin suppression in the zebrafish pineal gland. Exp. Eye Res. 84, 92–99.

[21] Appelbaum, L., Vallone, D., Anzulovich, A., Ziv, L., Tom, M., Foulkes, N.S. and Gothilf, Y. (2006) Zebrafish arylalkylamine-N-acetyltransferase genes – targets for regulation of the circadian clock. J. Mol. Endocrinol. 36, 337–347.

[22] Albrecht, U. (2004) The mammalian circadian clock: a network of gene expression. Front Biosci 9, 48–55.

[23] Reppert, S.M. and Weaver, D.R. (2002) Coordination of circadian timing in mammals. Nature 418, 935–941.

[24] Emery, P. and Reppert, S.M. (2004) A rhythmic Ror. Neuron 43, 443–446.

[25] Postlethwait, J.H. et al. (1998) Vertebrate genome evolution and the zebrafish gene map. Nat. Genet. 18, 345–349.

[26] Kobayashi, Y. et al. (2000) Molecular analysis of zebrafish photolyase/ cryptochrome family: two types of cryptochromes present in zebrafish. Genes Cells 5, 725–738.

[27] Tamai, T.K., Young, L.C. and Whitmore, D. (2007) Light signaling to the zebrafish circadian clock by Cryptochrome 1a. Proc. Natl Acad. Sci. USA 104, 14712–14717.

[28] Wang, H. (2008) Comparative analysis of teleost fish genomes reveals preservation of different ancient clock duplicates in different fishes. Mar Genomics 1, 69–78.

[29] Wang, H. (2009) Comparative genomic analysis of teleost fish bmal genes. Genetica 136, 149–161.

[30] Hirayama, J., Fukuda, I., Ishikawa, T., Kobayashi, Y. and Todo, T. (2003) New role of zCRY and zPER2 as regulators of sub-cellular distributions of zCLOCK and zBMAL proteins. Nucleic Acids Res. 31, 935–943.

[31] Ishikawa, T., Hirayama, J., Kobayashi, Y. and Todo, T. (2002) Zebrafish CRY represses transcription mediated by CLOCK-BMAL heterodimer without inhibiting its binding to DNA. Genes Cells 7, 1073–1086.

[32] Wang, H. (2008) Comparative analysis of period genes in teleost fish genomes. J. Mol. Evol. 67, 29–40.

[33] Ziv, L. and Gothilf, Y. (2006) Circadian time-keeping during early stages of development. Proc. Natl. Acad. Sci. USA 103, 4146–4151.

[34] Ziv, L., Levkovitz, S., Toyama, R., Falcon, J. and Gothilf, Y. (2005) Functional development of the zebrafish pineal gland: light-induced expression of period2 is required for onset of the circadian clock. J. Neuroendocrinol. 17, 314–320.