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Daniel Hartline, Ph.D.

Researcher, Békésy Laboratory of Neurobiology (PBRC)
Director, Békésy Laboratory of Neurobiology

Research Interests

Area 1: Evolution of Myelin

In a collaboration with Petra Lenz (PBRC) and Ann Castelfranco (PBRC) we are making an integrated study of myelin evolution with a focus on invertebrates. Research on this innovation involves integration of many biological levels, linking studies of:

  1. Genomic evolution of myelin-related molecules
  2. Ultrastructural details of origins in developing myelin
  3. Evolution of changes in nerve impulse conduction physiology
  4. Computational models of intermediate stages in myelin evolution
  5. Impacts on whole organism behavior, including success in evasion of predatory attacks
  6. Ecology of myelinate vs amyelinate copepods under different environmental regimes
  7. Biogeography of myelination -- differential distribution of myelinate vs amyelinate species around the world

Viewed in the broad context of innovation, myelin may provide a useful tool for studies in evolutionary biology.

Area 2: Neuroecology of Zooplankton Sensory and Motor Systems (in collaboration with Dr. Petra Lenz and others)

In this work, we are examining the relation between physiological and morphological properties of the sensory and motor systems of crustaceans, comparing pelagic and planktonic forms with benthic groups. We are interested in the evolution and ecology of these systems. Both systems reflect unusual adaptations to pelagic life when compared to similar systems in benthic and nektonic forms. Particular modifications of these sensory properties may reflect differences in ecology among phyletic groups. Of particular recent interest have been mechanisms involved in predator-evasion behavior in calanoid copepods including:

  1. Detection thresholds for small hydrodynamic disturbances, both behavioral and physiological
  2. Physiological characterization of giant antennal mechanoreceptors
  3. Escape reactions of free-swimming copepods to hydrodynamic and photic stimuli (collaborations with Dr. Edward Buskey, of the University of Texas at Austin and Dr. Rudi Strickler of the University of Wisconsin-Milwaukee)
  4. Predator-prey interactions between copepods of different developmental stages and larval fish of different ages.

Selected Publications

Selected (for a more complete list, see personal web pages):

Area 1: Crustacean myelin and myelin evolution

Wilson, C.H. and Hartline, D.K. (2011) The novel organization and development of copepod myelin. I. Ontogeny J. Comp. Neurol. 519:3259-3280.

Wilson C.H. and Hartline D.K. (2011) The novel organization and development of copepod myelin. II. Non-glial origin. J. Comp. Neurol. 519:3281-3305.

Hartline, D.K. (2008) "What is myelin?" Neuron Glia Biol. 4(2): 153-163

Hartline, D.K. and Colman, D.R. (2007) "Rapid conduction and the evolution of giant axons and myelinated fibers." Curr. Biol. 17: R29-R35.


Area 2: Copepod neuroecology

Burdick, D.S., Hartline, D.K. and Lenz P.H. (2007). Escape strategies in co-occurring calanoid copepods. Limnol. Oceanogr. 52: 2373-2385.


Other topics:

Hartline, D.K. (2011) The evolutionary origins of glia. Glia 59:1215-1236.

Hartline D.K. and Christie A.E. (2010) Immunohistochemical mapping of histamine, dopamine, and serotonin in the central nervous system of the copepod Calanus finmarchicus (Crustacea; Maxillopoda; Copepoda). Cell Tissue Res. 341(1):49-71

Castelfranco, A.M. and Hartline, D.K. (2004) Corrections for space-clamp errors in measured parameters of voltage-dependent conductances in a cylindrical neurite Biol. Cybern. 90: 280-290. [PDF]

Contact Info

This email address is being protected from spambots. You need JavaScript enabled to view it.
(808) 956-8003 (ph)
(808) 956-6984 (fax)
1993 East-West Road
Honolulu, HI 96822

Related Labs & Projects

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