Morris Laboratory Publications
Dodge, T.O., 鈥︹orris, M.R., Schartl, M., Powell, D.L. and Schumer, M. (in press) Complex structural variation and behavioral interactions underpin a balanced sexual mimicry polymorphism. Current Biology
Preising, G.A., Gunn, T.,鈥..Rios-Cardenas, O., Morris, M.R., and Schumer, M. (in press) Recurrent evolution of small body size and loss of the sword ornament in Northern Swordtail Fish. Evolution
Langdon, Q.K., Groh J.S., Stepfanie M.A., Powell D.L., Gunn T., Payne P., Baczenas J.J., Donny A., Dodge T.O., Du K., Schartl M., R铆os-C谩rdenas O., Gutierrez-Rodr铆guez C., Morris M.R., Schumer M. (2024) Genome evolution is surprisingly predictable after initial hybridization. PLOS Biology 22(8): e3002742.
Cobb N.E., Mason S.M., Tompkins K., Fitschen-Brown M., Rios-Cardenas O., Morris M.R. (2024) Variation in the Strength of Female Mate Preferences Support the Signal Reliability Hypothesis. PlosOne 19(6), e0303691.
Fitschen-Brown, M., Morris M.R. (2023) Genotype and growth rates influence female mate preferences in Xiphophorus multilineatus: potential selection to optimize mortality-growth rate tradeoff. Plos One
Stec, H., Gambill, M., Whitmer, H., Tompkins, K. Rios-Cardenas, O., Morris, M.R. (2023) Physiological cost to behavioral plasticity in a swordtail fish: clues to its evolutionary loss. Animal Behavior, 201, 167-174.
Preising, G.A., Gunn, T., Baczenas, J.J., Pollock, A., Powell, D.L., Dodge, T.O., Angel J., Kairuz, M., Savage, M., Lu, Y., Fitschen-Brown, M., Cummings, M., Thakur, S., MichaTobler, M., R铆os-Cardenas, O., Morris, M.R., Schumer M. (2022) Recurrent evolution of small body size and loss of the sword ornament in Northern Swordtail fish. bioRxiv
Fitschen-Brown, M., Tudor, M. S., Hamlin, H., Morris M.R. (2022) Higher Cortisol in Muscle Correlates with Weaker Strength of Female Mate Preference in Swordtail Fish, Xiphophorus multilineatus. Animal Behavior 187, 63-69.
Liotta, M.N., Kamara, S., Abbot, J.K, Rios-Cardenas, O., Morris, M.R. (2021) Evidence for Genetic Integration of Mating Behavior and Morphology in a Behaviorally Plastic Alternative Reproductive Tactic. Evolutionary Ecology, 35, 723-737.
Tompkins, K., Lott, M.S., Rios-Cardenas, O., Jash, S., Morris, M.R. (2021) Metabolic-growth hypothesis for the evolution of the nuchal hump fat deposit in swordtail fishes. Environmental Biology of Fishes, 104, 1195-1206.
Liotta, M.N., Abbot, J.K, Morris M.R., Rios-Cardenas O. (2021) Antagonistic selection on body size and sword length in a wild population of the swordtail fish, Xiphophorus multilineatus:potential for intralocus tactical conflict. Ecology and Evolution. 11, 3941-3955. ()
Liotta, M.N., Abbot, J.K, Morris M.R., Rios-Cardenas O. (2021) Antagonistic selection on body size and sword length in a wild population of the swordtail fish, Xiphophorus multilineatus:potential for intralocus tactical conflict. Ecology and Evolution. 11, 3941-3955. ()
D'Amore, D. M., Popescu, V. D., & Morris, M. R. (2019). The influence of the invasive process on behaviours in an intentionally introduced hybrid, Xiphophorus helleri鈥搈aculatus. Animal Behaviour, 156, 79-85.
Abbott J.K., Rios-Cardenas O., Morris M.R. (2019a) Invited Review: Insights from Intralocus Tactical Conflict: adaptive states, interactions with ecology and population divergence. Perspectives, Oikos 128 (11), 1525-1536. (Highlighted as Editor鈥檚 Choice).
Abbott J.K., Rios-Cardenas O., Morris M.R. (bioRxiv, September 2019b) Genetic correlations across genetically determined and developmentally plastic alternative reproductive tactics.
Griebling, H., Rios-Cardenas O., Abbot, J., Morris M.R. (2020) A study of tactical and sexual dimorphism in cognition with insights for sexual conflict. Animal Behaviour. 170, 43-50.
Liotta, M.R., Abbott, J.K., Rios-Cardenas, O., Morris, M.R. (2019) . Biological Journal of the Linnean Society
Weinstein M., Liotta M.N., Solitt A., Hunt A., Abbott J.K., Rios-Cardenas O., and Morris M.R. (2019) . Evolutionary Ecology
Morris MR, Friebertshauser RJ, Zupi M, Liotta MN, Dunn G, Kleinas N and R铆os-Cardenas O (2018) . Zebrafish 2018
R铆os-Cardenas O, Bono L, Morris MR (2018) . Animal Behaviour 140, 19-28.
Lu, Y., Klimovich, C., Robeson, K., Boswell, W., Rios-Cardenas, O., Walter, R.B., Morris, M.R. (2017) PeerJ, 5, e3275
Morris, M.R., Ludwar L.C., Swingle, E., Mamo, M.N., and Shubrook, J.H. (2016) 鈥淎 new method to assess asymmetry in fingerprints can be used as an early indicator of type 2 diabetes mellitus鈥 Diabetes Science and Technology. DOI: 10.1177/1932296816629984
Morris, M.R., R.J. Friebertshauser, O. Rios-Cardenas, M.N. Liotta and J.K. Abbott (2016) Selection on growth rates across alternative reproductive tactics in the swordtail Xiphophorus multilineatus. Evolutionary Ecology 30 (3), 519-533.
D鈥橝more, D.M., Rios-Cardenas, O. and Morris, M.R. (2015) Maternal investment influences development of a behavioral syndrome in swordtail fish, Xiphophorus multilineatus. Animal Behaviour 103, 147-151.
Lyons, S.M., Goedert, D., and Morris, M.R. (2014). Male-trait-specific variation in female mate preferences. .
Murphy, A., Goedert, D. and Morris, M.R. (2014) Maternal effects are long lasting and influence female offspring鈥檚 reproductive strategy in the swordtail fish Xiphophorus multilineatus. Journal of Evolutionary Biology
Morris, M. R., Goedert, D., Abbott J.K., Robinson D.M. and Rios-Cardenas O. (2013) Intralocus tactical conflict and the evolution of alternative reproductive tactics. .
Morris, M.R. and Rios-Cardenas, O. (2013). Underestimating the role of female preference and sexual conflict in the evolution of ARTs in fishes: Insights from a clade of Neotropical fishes. In: (Regina H. F. Macedo and Glauco Machado, Editors).
Rios-Cardenas, O., Brewer, J., and Morris, M.R. (2013). Maternal Investment in the Swordtail Fish Xiphophorus multilineatus: support for the differential allocation hypothesis. .
Rios-Cardenas O. and Morris M.R. (2012). The implications of variation in female preferences for swordtail fishes. In: Viviparous Fishes II, the proceedings of the III International Symposium on Viviparous Fishes. M.C. Uribe & H.J. Grier, editors. New Life Publications, Homestead, USA
Morris, M. R., Rios-Cardenas, O., Lyons, S., Tudor, M.S. and Bono, L. (2012). Fluctuating asymmetry indicates optimization of growth rate over developmental stability. . Bono, L.M., Rios-Cardenas, O. and Morris, M.R. (2011). Alternative life history strategies in Xiphophorus multilineatus: Evidence for different ages to sexual maturity but not growth rates in the wild. Journal of Fish Biology 78, 1311-1322.
Rios-Cardenas, O. and Morris, M.R. (2011) Precopulatory Sexual Selection in Poeciliidae. Chapter 17 in: Ecology and Evolution of Poeciliid Fishes (editors: Jon Evans, Andrea Pilastro & Ingo Schlupp) University of Chicago Press, Chicago USA.
Robinson, D. Tudor, M.S and Morris M.R. (2011) Female preference and the evolution of an exaggerated male ornament: the shape of the preference function matters. .
Tudor M.S. and Morris M.R. (2011) Frequencies of alternative mating strategies influence female mate preference in the swordtail Xiphophorus multilineatus.
Morris, M. R., Rios-Cardenas, O. and Brewer, J. (2010) Variation in mating preference within a wild population influences the mating success of alternative mating strategies. .
Tudor, M. S. and Morris, M. R (2009) Does male mate preference in the swordtail Xiphophorus malinche influence variation in female preference for symmetry? Animal Behaviour 146, 727-740.
Tudor, M. S. and Morris, M. R. (2009) Experience plays a role in female preference for symmetry in the swordtail fish Xiphophorus malinche. .
Lyons, S. and Morris, M. R. (2008) Headstands: a sexually selected signal in the swordtail fish Xiphophorus nezahualcoyotl Behaviour 145, 1247-1262.
Morris, M. R., Rios-Cardenas, O. and Darrah, A. (2008) Male mating tactics in the Northern Mountain Swordtail fish (Xiphophorus nezahualcoyotl): coaxing and coercing females to mate. .
Fernandez, A. A. and Morris, M. R. (2008) Mate choice for more melanin as a mechanism to maintain a functional oncogene. .
Gerl, E.J. and Morris, M.R. (2008) The Causes and Consequences of Color Vision Evolution: Education and Outreach
Guti茅rrez-Rodr铆guez, C., Shearer, A., Morris, M. R., and de Queiroz, K. (2008). Phylogeography and monophyly of the swordtail fish species Xiphophorus birchmanni (Cyprinodontiformes, Poeciliidae). .
Morris, M. R., Tudor, S. M. and Dubois, N. S. (2007). Sexually selected signal attracted females prior to deterring aggression in rival males. .
Rios-Cardenas, Tudor, M. S. and Morris, M. R. (2007) Variation in female preference has implications for the maintenance of an alternative mating strategy in a swordtail fish. .
Fernandez, A. A. and Morris, M. R. (2007). Sexual Selection and Trichromatic Color Vision in Primates: Statistical Support for the Pre-existing Bias Hypothesis. .
Just, W., Morris, M. R., and Sun, X. (2007) The evolution of aggressive losers. .
Guti茅rrez-Rodr铆guez, C. Morris, M. R., Dubois, N. S. and de Queiroz, K. (2007) Genetic variation and phylogeography of the swordtail fish Xiphophorus cortezi(Cyprinodontiformes, Poeciliidae). .
Moretz, J. A. and Morris, M. R. (2006) Phylogenetic Analysis of the Evolution of a Signal of Aggressive Intent in Northern Swordtail Fishes. 168, 336鈥349.
Wiegmann, D. D. and Morris, M. R. (2006) Search Behavior and Mate Choice. Recent Advances in Experimental and Theoretical Biology 1, 201-216.
Morris, M. R., Cardenas-Rio, O. and Tudor, M. S. (2006) Larger swordtail females prefer asymmetrical males. .
Morris, M. R., Moretz, J. A., Farley, K. and Nicoletto, P. (2005) The Role of Sexual Selection in the Loss of Sexually Selected Traits in the Swordtail Fish Xiphophorus continens.
Just, W. and Morris, M. R. (2003) The Napoleon Complex: Why Smaller Males Pick Fights.
Moretz, J. A., Morris, M. R (2003) Evolutionarily Labile Responses to a Conventional Threat Signal. .
Hankison, S. J. and Morris, M. R. (2003) Avoiding a compromise between sexual selection and species recognition: female swordtail fish assess multiple species-specific cues.
Morris, M. R. Hesselman, L. and Nicoletto, P. (2003) A Polymorphism in female preference for a polymorphic male trait in the swordtail Xiphophorus cortezi. 65(1), 45-52.
Hankison, S.J. and Morris, M.R. (2002) Sexual selection and species identification in Xiphophorus pygmaeus: conflicting preferences.
Morris, M.R., Elias, J. A. and Moretz, J. A. (2001) Defining the sexually selected male trait vertical bars in relation to female preference in the swordtail fish Xiphophorus cortezi.
Dries, L., Morris, M.R. and Ryan, M. J. (2001) Why are some male pygmy swordtails large?
Morris, M. R., de Queiroz, K. and Morizot, D. (2001) Phylogenetic relationships among the Northern Swordtails (Xiphophorus) as inferred from allozyme data. .
Merry, J. W. and Morris, M. R. (2001) Preference for symmetry in swordtail fish.
Hoefler, C. H. and Morris, M. R. (1999) A technique for the temporary application and augmentation of pigment patterns in fish.
Morris, M. R. (1998) Further examination of female preference for vertical bars in swordtails: preference for "no bars" in a species without bars.
Morris, M. R. (1998) Female Preference for Trait Symmetry in Addition to Trait Size in Swordtail Fishes. , B.1399, 907-911.
Morris, M. R. and Casey, K. (1998) Female swordtail fish prefer symmetrical sexual signal. Animal Behaviour 55, 33-39.
Morris, M. R., Wagner Jr., W.E. and Ryan, M. J. (1996). A negative correlation between trait and mate preference in Xiphophorus pygmaeus.
Morris, M. R. and Ryan, M. J. (1996) Sexual difference in sender-receiver coevolution. .
Wiens, J.J. and Morris, M.R. (1996) Sexual selection and the evolution of swords. .
Morris, M.R., Gass, L. & Ryan, M.J. (1995). Assessment and individual recognition of opponents in the swordtails Xiphophorus nigrensis and Xiphophorus multilineatus. .
Morris, M.R., Mussel, M. and Ryan, M. J. (1995) Vertical body bars on male X. multilineatus: a signal that deters rival males and attracts females. .
Morris, M.R. and Ryan, M.J. (1995) Large body size in the pygmy swordtail Xiphophorus pygmaeus.
Morris, M.R., Batra, P., and Ryan, M.J. (1992) Male-male competition and access to females in the swordtail Xiphophorus nigrensis.
Morris, M.R. and Ryan, M.J. (1992) Breeding cycles in natural populations of Xiphophorus nigrensis, X. multilineatus, and X. pygmaeus. .
Ryan, M.J., Pease, C.E. and Morris, M.R. (1992) Maintenance of a genetic polymorphism in the swordtail Xiphophorus nigrensis: A general life history model. 139, 21-31.
Gardner, R. & Morris, M.R. (1991) The evolution of bluffing in animal contests: an extended model. In: . Ed. Selten, R. pp 182-194. Springer-Verlag, Berlin.
Morris, M.R. (1991) Mating behaviour in the treefrog Hyla ebraccata. Journal of Zoology 223, 371-378.
Morris, M.R. & Ryan M.J. (1990) Age at sexual maturity of male Xiphophorus nigrensis in nature.
Morris, M.R. (1989) Female choice and selection for male size in the treefrog Hyla chrysoscelis.
Gardner, R. & Morris, M.R. (1989) The evolution of bluffing in animal contests: an ESS approach.
Morris, M.R. & Yoon, S.L. (1989) A mechanism for female choice of large males in the treefrog Hyla chrysoscelis. .
Gardner, R., Morris, M.R. and Nelson, C.E. (1987) Conditional evolutionarily stable strategies. .
Other publications:
Morris, M. R. (2009) Book Review. Fish Behaviour by Carin Magnhagen, Science Publishers, Quarterly Review of Biology
Rios-Cardenas O. and Morris M. R. (2008) Mating systems and strategies of tropical fish. In : International Commission on Tropical Biology and Natural Resources (Eds. Claro, K., Oliveira, P.S. , Gray, V. et al.), Encyclopedia of Life Support Systems (EOLSS), Developed under the auspices of the UNESCO, , Oxford , UK.
Macedo, R.H., & Morris, M. R. 2008. Introduction to Tropical Zoology. In : International Commission on Tropical Biology and Natural Resources (Eds. Claro, K., Oliveira, P.S. , Gray, V. et al.), in Encyclopedia of Life Support Systems (EOLSS), Developed under the auspices of the UNESCO, , Oxford , UK.
Rios-Cardenas O. and Morris M. R. (2007). The implications of variation in female preferences for swordtail fishes. In: Viviparous Fishes II, the proceedings of the III International Symposium on Viviparous Fishes.
Morris, M.R. (2005) Book Review. Animal Signals by Maynard Smith, J. & Harper, D. Oxford Series in Ecology and Evolution, Oxford University Press, New York. Ethology 111-10, 1071-1072.
Wiens, J.J and Morris M.R. (2003) Book Review. Sexual Selections by M. Zuk, Quarterly Review of Biology 78, 127.
Morris, M.R. (1996) Book Review. Amphibian Biology, Volume 2, Social Behavior(Editors Heatwole, H. and Sullivan, B.) Herpetological Review, 27, 220-221.
Greig, N. and Morris, M. (1992) eds. Tropical Biology: An Ecological Approach 92-1. Organization for Tropical Studies, Inc., Duke University, Durham, NC