Timothy C. Tricas

Assistant Professor
Department of Zoology
Ph.D., University of Hawaii, 1986
tricas@hawaii.edu
Fishlab
Zoology Website


Research Interests

  • Sensory neurobiology, behavior ecology of marine fishes
  • Reporductive and behavioral ecology of sharks and rays
  • Biomedical electronics and biotelemetry

Selected Publications

Maruska, K.M. and T.C. Tricas. Test of the mechanotactile hypothesis: neuromast morphology and response dynamics of mechanosensory lateral line primary afferents in the stingray. Journal of Experimental Biology (in press).
Tricas, T. C. and J.A. Sisneros. 2004. Ecological functions and adaptations of the elasmobranch electrosense, pp. 308-329. In: G. von der Emde, J. Mogdans & B.G. Kapoor (eds.), The Senses of Fishes: Adaptations for the Reception of Natural Stimuli, Narosa Publishing House, New Delhi, India.
Bodznick, D., J. Montgomery and T.C. Tricas. 2003. Electroreception: extracting behaviorally important signals from noise, pp. 389-403. In: S. Collin & J. Marshall (eds.), Sensory Processing in the Aquatic Environment, Springer-Verlag
Sisneros, J.A. and T.C. Tricas. 2002. Neuroethology and life history adaptations of the elasmobranch electric sense.  Journal of Physiology - Paris 96 (2002) 379-389
Sisneros, J.S. and T.C. Tricas. 2002. Ontogenetic changes in the response properties of the peripheral electrosensory system in the Atlantic stingray (Dasyatis sabina). Brain, Behavior and Evolution 59:130-140
Motta, P.J., R.E. Hueter, T.C. Tricas and A.P. Summers. 2002. Kinematic analysis of suction feeding in the nurse shark, Ginglymostoma cirratum (Orectolobiformes, Ginglymostomatidae). Copeia 2002(1):24-38
Boyle, R., A.F. Mensinger, K. Yoshida, S. Usui, A. Intravaia, T. Tricas and S.M. Highstein. 2001. Neural readaptation to earth's gravity following return from space. Journal of Neurophysiology 86:2118-2122
Tricas, T.C. and S.H. Gruber. 2001. The Behavior and Sensory Biology of Elasmobranch Fishes: An Anthology in Memory of Donald Richard Nelson. Developments in Environmental Biology of Fishes 20, Kluwer Academic Publishers, Dordrecht, 320 pp.
Tricas, T.C. 2001. The neuroecology of the elasmobranch electrosensory world: why peripheral morphology shapes behavior. Environmental Biology of Fishes 60:77-92
Tricas, T.C. 2001. Shark meets man: the research and academic life of Donald Richard Nelson (1939-1997). Environmental Biology of Fishes 60:15-18
Tricas, T.C. and S.H. Gruber. 2001. Prelude to the anthology in memory of Donald Richard Nelson. Environmental Biology of Fishes 60:7-11
Sisneros, J.A. and T.C. Tricas. 2000. Androgen-induced changes in the response dynamics of ampullary electrosensory primary afferent neurons. Journal of Neuroscience 20:8586-8595
Forlano, P.M., K.P. Maruska, S.A. Sower, J.A. King and T.C. Tricas. 2000. Differential distribution of gonadotropin-releasing hormone-immunoreactive neurons in the stingray brain: functional and evolutionary considerations. General and Comparative Endocrinology 118(2):226-248
Tricas, T.C., K.P Maruska and E. Rasmussen. 2000. Annual cycles of steroid hormone production, gonad development, and reproductive behavior in the Atlantic stingray. General and Comparative Endocrinology 118(2):209-225
Kajiura, S.M., Sebastian, A. and T.C. Tricas. 2000. Dermal bite wounds as indicators of reproductive seasonality and behaviour in the Atlantic stingray, Dasyatis sabina. Environmental Biology of Fishes 58(1):23-31
Tricas, T.C. 1999. Shark Ecology. In: Sharks (J. Stevens, ed.), 2nd ed., pp. 96-101, Weldons Pty., NSW
Maruska, K.M. and T.C. Tricas. 1998. Morphology of the mechanosensory lateral line system in the Atlantic stingray, Dasyatis sabina: The Mechanotactile Hypothesis. Journal of Morphology 238:1-22
Sisneros, J.A., T.C. Tricas and C.A. Luer. 1998. Response properties and biological function of the skate electrosensory system during ontogeny. Journal of Comparative Physiology, A 183(1):87-99
Tricas, T.C. and J.G. New. 1998. Sensitivity and response dynamics of electrosensory primary afferent neurons to near threshold fields in the round stingray. Journal of Comparative Physiology, A 182(1):89-101
New, J.G. and T.C. Tricas. 1997. Electroreceptors and Magnetoreceptors: Morphology and Function. In: Cell Physiology Source Book (N. Sperlakis, ed.), 2nd ed., pp. 741-758. Academic Press, San Diego
Motta, P.J., T.C. Tricas, R.E. Hueter and A.P. Summers. 1997. Feeding mechanics and functional morphology of the jaws of the lemon shark, Negaprion brevirostris (Chondrichthyes, Carcharhinidae). Journal of Experimental Biology 200:2765-2780
Tricas, T.C., K. Deacon, P. Last, J.E. McCosker, T.I. Walker and L. Taylor. 1997. Sharks and Rays. Weldon Owen, Sydney, 288 pp.
Maruska, K.M., E.G. Cowie and T.C. Tricas. 1996. Periodic gonadal activity and protracted mating in elasmobranch fishes. Journal of Experimental Zoology 276:219-232
Kajiura, S.M. and T.C. Tricas. 1996. Seasonal dynamics of dental sexual dimorphism in the Atlantic stingray, Dasyatis sabina. Journal of Experimental Biology 199:2297-2306
Tricas, T.C ., S.W. Michael and J.A. Sisneros. 1995. Electrosensory optimization to conspecific phasic signals for mating. Neuroscience Letters 202(1-2):129-132
Motta, P.J., R.E. Heuter and T.C. Tricas. 1991. An electromyographic analysis of the biting mechanism of the lemon shark, Negaprion brevirostris: Functional and evolutionary implications. Journal of Morphology 210:55-69
Tricas, T.C. and S.M. Highstein. 1991. Action of the octavolateralis efferent system upon the lateral line of free-swimming toadfish, Opsanus tau. Journal of Comparative Physiology, A 169:25-37
Tricas, T.C. and S.M. Highstein. 1990. Visually mediated inhibition of lateral line primary afferent activity by the octavolateralis efferent system during predation in the free-swimming toadfish, Opsanus tau. Experimental Brain Research 83:233-236
Tricas, T.C. 1989. Food and competitors as determinants of territory size in the Hawaii butterflyfish, Chaetodon multicinctus. Animal Behaviour 37:830-841
Tricas, T.C. and J.T. Hiramoto. 1989. Sexual differentiation, oocyte development, and spawning seasonality in the butterflyfish, Chaetodon multicinctus. Environmental Biology of Fishes 25:175-185
Tricas, T.C. 1989. Prey selection by coral-feeding butterfly-fishes: Strategies to maximize the profit. Environmental Biology of Fishes 25:171-185
Hourigan, T., T.C. Tricas and E.S. Reese. 1988. Coral reef fishes as indicators of environmental stress in coral reefs. In: Marine Organisms as Indicators (D.F. Soule and G.S. Kleppel, eds.), pp. 107-135, Springer-Verlag, New York, NY
Tricas, T.C. 1987. Shark Ecology. In: Sharks and Shark Attack (J. Stevens, ed.), pp. 96-101, Weldons Pty., NSW
Tricas, T.C. 1986. Life history, foraging ecology, and territorial behavior of the Hawaiian butterflyfish, Chaetodon multicinctus. Ph.D. Dissertation. University of Hawaii (Honolulu), 247 pp.
Tricas, T.C. 1985. Feeding ethology of the white shark, Carcharodon carcharias. Memoirs of the Southern California Academy of Sciences. 9:81-91
Tricas, T.C. and E.M. LeFeuvre. 1985. Mating behavior of the reef white-tip shark, Triaenodon obesus. Marine Biology 84(3):233-237
Tricas, T.C. 1985. The economics of foraging in corallivorous butterflyfishes of Hawaii. Proceedings of the 5th International Coral Reef Congress 5:409-414
Tricas, T.C. and J.E. McCosker. 1984. Predatory behavior of the white shark, Carcharodon carcharias, and notes on its biology. Proceedings of the California Academy of Science 43(14):221-238
Tricas, T.C. 1982. Bioelectric-mediated predation by swell sharks Cephaloscyllium ventriosum. Copeia 1982(4):948-952
Tricas, T.C., L.R. Taylor and G. Naftel. 1981. Diel activity of the tiger shark Galeocerdo cuvier, at French Frigate Shoals, Hawaiian Islands. Copeia 1981(4):904-908
Tricas, T.C. 1980. Courtship and mating-related behaviors in myliobatid rays. Copeia 1980(3):553-556
Tricas, T.C. 1979. Relationships of the blue shark Prionace glauca, and its prey species near Santa Catalina Island, California. Fishery Bulletin 77(1):175-182
Tricas, T.C. 1977. Food habits, movements, and seasonal abundance of the blue shark, Prionace glauca (Carcharhinidae), in southern California waters. Master's thesis, California State University, Long Beach, 79 pp.