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School of the Earth, Ocean and Environment

Faculty and Staff Directory

Daniel Speiser

Title: Associate Professor
Department: Biological Sciences
College of Arts and Sciences
Phone: 803-777-6597
Office: CLS, Room 606
Resources: Curriculum Vitae [pdf] 
Speiser Lab 

Department of Biological Sciences
School of the Earth, Ocean and Environment
Dan Speiser

Research Areas

Marine Ecology and Evolution

Research Summary

The Speiser Lab studies the structure, function, and evolution of visual systems in marine invertebrates. We do so using an integrative approach that combines behavioral experiments, molecular approaches, neurophysiological recordings, and computational modeling. Recent projects focus on the distributed, multi-eye visual systems of molluscs such as scallops and chitons. In other words, we study how (and why) seafood sees you.

Publications on Google Scholar

Recent Publications

Ramirez, M.D, A.N. Pairett, M.S. Pankey, J.M. Serb, D.I. Speiser, A.J. Swafford, and T.H. Oakley. The Last Common Ancestor of Most Bilaterian Animals Possessed at Least Nine Opsins. Genome Biology and Evolution 8(12): 3640-3652. DOI:10.1093/gbe/evw248

Speiser, D.I, Y.L. Gagnon, R.K. Chhetri, A.L. Oldenburg, and S. Johnsen (2016). Examining the Effects of Chromatic Aberration, Object Distance, and Eye Shape on Image-Formation in the Mirror-Based Eyes of the Bay Scallop Argopecten irradians. Integrative and Comparative Biology (Advance Access published August 22, 2016). DOI:10.1093/icb/icw099

Speiser, D.I, and L.A. Wilkins (2016). Neurobiology and behaviour of the scallop. In book: Scallops: Biology, Ecology, Aquaculture, and Fisheries 3rd Edition, eds. S.E. Shumway and G.J. Parsons. Elsevier Science, pp. 219-251.

Williams, S.T, S. Ito, K. Wakamatsu, T. Goral, N.P. Edwards, R. A. Wogelius, T. Henkel, L.F.C. de Oliveira, L.F. Maia, S. Strekopytov, T. Jeffries, D.I. Speiser, and J.T. Marsden (2016). Identification of Shell Colour Pigments in Marine Snails Clanculus pharaoniusand C. margaritarius (Trochoidea; Gastropoda). PloS ONE 11(7): e0156664 DOI:10.1371/journal.pone.0156664

Li, L, M.J. Connors, M. Kolle, G.T. England, D.I. Speiser, X. Xiao, J. Aizenberg, and C. Ortiz (2015). Multifunctionality of chiton biomineralized armor with an integrated visual system. Science 350(6263):952-956. DOI:10.1126/science.aad1246

Stahl, B.A, J.B. Gross, D.I. Speiser, T.H. Oakley, N.H. Patel, D.B. Gould, and M.E. Protas (2015). A Transcriptomic Analysis of Cave, Surface, and Hybrid Isopod Crustaceans of the Species Asellus aquaticus. PLoS ONE 10(10): e0140484. DOI:10.1371/journal.pone.0140484

Oakley, T.H, and D.I. Speiser (2015). How Complexity Originates: The Evolution of Animal Eyes. Annual Review of Ecology, Evolution, and Systematics, 46: 237-260. DOI:10.1146/annurev-ecolsys-110512-135907

Battelle, B.A., K.E. Kempler, S.R. Saraf, C.E. Marten, D.R. Dugger, D.I. Speiser, and T.H. Oakley (2015). Opsins in Limulus eyes: characterization of three visible light-sensitive opsins unique to and co-expressed in median eye photoreceptors and a peropsin/RGR that is expressed in all eyes. Journal of Experimental Biology 218:466-479. DOI:10.1242/jeb.116087.

Speiser, D.I, M.S. Pankey, A.K. Zaharoff, B.A Battelle, H.D. Bracken-Grissom, J.W. Breinholt, S.M. Bybee, T.W. Cronin, A. Garm, A.R. Lindgren, N.H. Patel, M.L. Porter, M.E. Protas, A.S. Rivera, J.M. Serb, K.S. Zigler, K.A. Crandall, and T.H.Oakley (2014). Using phylogenetically-informed annotation (PIA) to search for light-interacting genes in transcriptomes from non-model organisms. BMC Bioinformatics 15:350. DOI:10.1186/s12859-014-0350-x.

Speiser, D.I, D.G. DeMartini, and T.H. Oakley (2014). The shell-eyes of the chiton Acanthopleura granulata (Mollusca, Polyplacophora) use pheomelanin as a screening pigment. Journal of Natural History 48: 2899-2911. DOI:10.1080/00222933.2014.959572.

Gagnon, Y.L, D.I. Speiser, and S. Johnsen (2014). Simplifying numerical ray-tracing for characterisation of optical systems. Applied Optics 53: 4784-4790. DOI:10.1364/AO.53.004784.

Brandley, N.C, D.I. Speiser, and S. Johnsen (2013). Eavesdropping on visual secrets. Evolutionary Ecology 27: 1045-1068. DOI:10.1007/s10682-013-9656-9.

Porter, M.L, D.I. Speiser, A.K. Zaharoff, R.L. Caldwell, T.W. Cronin and T.H. Oakley (2013). The evolution of complexity in the visual systems of stomatopods: Insights from transcriptomics. Integrative and Comparative Biology 53: 39-49. DOI:10.1093/icb/ict060.

Speiser, D.I, R.I. Lampe, V.R. Lovdahl, B. Carrillo-Zazueta, A.S. Rivera and T.H. Oakley (2013). Evasion of predators contributes to the maintenance of male eyes in dimorphic Euphilomedes ostracods (Crustacea). Integrative and Comparative Biology 53: 78-88. DOI:10.1093/icb/ict025.

Ramirez, M.D, D.I. Speiser, M.S. Pankey, and T.H. Oakley (2011). Understanding the dermal light sense in the context of integrative photoreceptor cell biology. Visual Neuroscience 28: 265-279. DOI:10.1017/S0952523811000150.

Speiser, D.I, D. Eernisse, and S. Johnsen (2011). A chiton uses aragonite lenses to form images. Current Biology 21: 665-670.DOI:10.1016/j.cub.2011.03.033.

Speiser, D.I, E.R. Loew, and S. Johnsen (2011). Spectral sensitivity of the concave mirror eyes of scallops: Potential influences of habitat, self-screening and longitudinal chromatic aberration. Journal of Experimental Biology 214: 422-431. DOI:10.1242/jeb.048108.

Speiser, D.I, and S. Johnsen (2008). Comparative morphology of the concave mirror eyes of scallops (Pectinoidea). American Malacological Bulletin 26: 27-34. DOI:10.4003/006.026.0204.

Speiser, D.I, and S. Johnsen (2008). Scallops visually respond to the presence and speed of virtual particles. Journal of Experimental Biology 211: 2066-2070. DOI:10.1242/jeb.017038.

Challenge the conventional. Create the exceptional. No Limits.