Student Publications

 Manuscripts submitted or in preparation

  • Hayward, J. L., Henson, S. M. Tkachuck, R., Tkachuck, C., Payne, B. G., Johnson, C. K. (In preparation). Predicting numbers of loafing gulls close to Pacific and Atlantic breeding colonies.
  • Henson, S. M., Hayward, J. L., Dennis, B., Galusha, J. G., Cushing, J. M., Foster, L., & Dass, S.  (In preparation). Compartmental models of animal behavior.
  • McWilliams, K. M., Hayward, J. L., Atkins, G. J., & Henson, S. M. (In preparation). Courtship and copulation in Glaucous-winged Gulls, Larus glaucescens.
  • Henson, S. M., Hayward, J. L., Cushing, J. M., Atkins, G. J., Sandler, A. G., & Saint Martin, W. (In preparation). Changing sea surface temperature alters timescale of reproductive synchrony in seabirds.
  • Atkins, G. J., Reichert, A. A., Henson, S. M., & Hayward, J. L. (In preparation). Copulation song synchronizes head-tossing and mounting behaviors in Glaucous-winged Gulls.
  • Sandler, A. G., Megna, L. C., Hayward, J. L., Henson, S. M., & Tkachuck, R. D. (Submitted). Every-other-day clutch-initiation synchrony in ring-billed gulls (Larus delawarensis).


Refereed papers

  1. Atkins, G. J., Sandler, A. G., McLarty, M., Henson, S. M., & Hayward, J. L., 2015. Oviposition behavior in Glaucous-winged Gulls (Larus Glaucenscens). Wilson Journal of Ornithology, 127:486-493.
  2. Payne, B. G., Henson, S. M., Hayward, J. L., Megna, L. C., & Velastegui Chavez, S. R., 2015.Environmental constraints on gaul-out and foraging dynamics in Galapagos marine iguanas. Journal of Coupled Systems and Multiscale Dynamics. (To appear).
  3. Navia, B., Burden, C. Steely, T., Hasegawa, H., Cha, E., Henson, Sm. M., Stout, J., & Atkins, G. J., 2015. Parallel effects of temperature on the male cricket calling song, phonotaxis of the female and the auditory responses of the L3 neurone. Physiological Entomology 40:113–122.
  4. Hayward, J. L., Atkins, G. J., Reichert, A. A., & Henson, S. M., 2015. Common Ravens (Corvus corax)pPrey on rhinoceros auklet (Cerorhinca monocerata) eggs, chicks, and possibly adults. Wilson Journal of Ornithology 127:336-339.
  5. Kang, J.H., & Tritch, W. 2015. Conditions for Existence or Nonexistence of Positive Solutions to Elliptic General Model.  British Journal of Mathematics & Computer Science, 8.6: 447-457.
  6. Seo, Y. L, & Oh, Y. M., 2015.  A curve satisfying T/K = S with constant K = 0.  American Journal of Undergraduate Research 12(2): 57-62. 
  7. Megna, L. C., Moncrieff, A. E., Hayward, J. L, & Henson, S. M., 2014. Equal reproductive success of phenotypes in the Larus glaucescens-occidentalis complex. Journal of Avian Biology 45:001-007. DOI: 10.1111/jav.00421
  8. Burton, D., & Henson, S. M., 2014. A note on the onset of synchrony in avian ovulation cycles. Journal of Difference Equations and Applications. DOI: 10.1080/10236198.2013.870564.
  9. Hayward, J. L., Weldon, L. M., Henson, S. M., Megna, L. C., Payne, B. G., Moncrieff, A. E., 2014. Egg cannibalism in seabird colony increases with sea surface temperature. Condor 116:62-73.
  10. Hayward, J. L., Megna, L. C., Payne, B. G., Velastegui Chavez, S. R., & Henson, S. M., 2013. Temporal and environmental effects on the behavior of flightless cormorants. Wilson Journal of Ornithology 125:790–799.
  11. Cowles, J. D., Henson, S. M., Hayward, J. L., & Chacko, M. W., 2013. A mathematical method for predicting harbor seal (Phoca vitulina) haulout and monitoring long-term population trends without telemetry. Natural Resource Modeling 26:605-627.
  12. McCormick, M. A., Hayward, J. L., and S. M. Henson, 2013. Egg mass in Glaucous-winged Gulls (Larus glaucescens) as a function of length and width. Northwestern Naturalist 94:147-150.
  13. Moncrieff, A. E., Megna, L. C., Hayward, J. L., & Henson, S. M., 2013. Mating patterns and breeding success in gulls of the Larus glaucescens-occidentalis complex, Protection Island, Washington, USA. Northwestern Naturalist 94:67-75.
  14. Henson, S. M., Weldon, L. M., Hayward, J. L., Greene, D. J., Megna, L. C., & Serem, M. C., 2011. Coping behavior as an adaptation to stress: Post-distrubance preening in colonial seabirds. Journal of Biological Dynamics, DOI 10.1080/17513758.2011.605913.
  15. Ibanez, B., Kang, J.H., & Lee, J.H., 2009. Non-negative steady state solutions to an elliptic biological model. International Journal of Pure and Applied Mathematics,.53.3:385-394.
  16. Hayward, J. L., Henson, S. M., Banks, J. C.,Lyn, S. L., 2008. Mathematical modeling of appendicular bone growth in glaucous-winged gullsJournal of Morphology.
  17. Moore, A. L., Damania, S. P., Henson, S. M., & Hayward, J. L., 2008. Modeling the daily activities of breeding colonial seabirds: dynamic occupancy patterns in multiple habitat patches. Mathematical Biosciences and Engineering 5:831-842.
  18. Cushing, J. M., Henson, S. M., & Blackburn, C. C , 2007. Multiple mixed-type attractors in a competition model. Journal of Biological Dynamics 1:347-362.
  19. Lizarraga, K.M., Kang, J.H., &  Lee, J.H., 2006. Perturbation of a nonlinear elliptic biological interacting model. Dynamics of Partial Differential Equations. 3(4).
  20. Henson, S. M., Hayward, J. L., & Damania, S. P., 2006  Identifying environmental determinants of diurnal distribution in marine birds and mammals. Bulletin of Mathematical Biology 68:467-482.
  21. Damania, S. P., Phillips, K. W., Henson, S. M., &  Hayward, J. L., 2005. Habitat patch occupancy dynamics in Glaucous-winged Gulls (Larus glaucescens) II: A continuous-time model. Natural Resource Modeling 18:469-499.
  22. Phillips, K. W., Damania, S. P., Hayward, J. L., Henson, S. M., &   Logan, C. J., 2005. Habitat patch occupancy dynamics in Glaucous-winged Gulls (Larus glaucescens) I: A discrete-time model. Natural Resource Modeling 18:441-468.
  23. Hayward, J. L., Henson, S. M., Logan, C. J., Parris, C. R., Meyer, M. W., &  Dennis, B., 2005. Predicting numbers of hauled-out harbour seals: a mathematical model. Journal of Applied Ecology 42:108-117.
  24. Henson, S. M., Hayward, J. L. Burden, C. M., Logan, C. J., & Galusha, J. G., 2004. Predicting dynamics of aggregate loafing behavior in gulls at a Washington colony. Auk 121:380-390.
  25. Henson, S. M, Reilly, J. R., Robertson, S. L., Schu, M. C., Rozier, E. W. D., & J. M. Cushing, 2003. Predicting irregularities in population cycles. SIAM Journal on Applied Dynamical Systems 2:238.