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Sean Lema

Sean Lema

Contact Information


Office: 181-417
Phone: (805) 756-2802

Research Lab:

Google Scholar

Research Interests:

  • Marine and freshwater fishes
  • Environmental endocrinology
  • Evolution of developmental and behavioral plasticity in changing environments
  • Climate change effects on fish reproduction and growth


Postdoctoral Associate, West Coast Center for Oceans and Human Health, NOAA Northwest Fisheries Science Center

Ph.D., Animal Behavior, University of California, Davis, 2004
M.S., Animal Behavior, University of California, Davis, 2001
B.S., Evolution and Ecology, University of California, Davis, 1999

Selected recent publications:

Bersin, T.V., Mapes, H.M., Journey, M.L., Beckman, B.R., Lema, S.C., 2023. Insulin-like growth factor-1 (Igf1) signaling responses to food consumption after fasting in the Pacific rockfish Sebastes carnatus. Comparative Biochemistry and Physiology, Part A 282, 111444.

Bersin, T.V., Cordova, K.L., Saenger, E.K., Journey, M.L., Beckman, B.R., Lema, S.C., 2023. Nutritional status affects Igf1 regulation of skeletal muscle myogenesis, myostatin, and myofibrillar protein degradation pathways in gopher rockfish (Sebastes carnatus). Molecular and Cellular Endocrinology 573, 111951.

Lema, S.C., Chow, M.I., Dittman, A.H., May, D., Housh, M.J., 2022. Accustomed to the heat: temperature and thyroid hormone influences on oogenesis and gonadal steroidogenesis pathways vary among populations of Amargosa pupfish (Cyprinodon nevadensis amargosae). Comparative Biochemistry and Physiology, Part A 272, 111280.

Bock, S.L., Chow, M.I., Forsgren, K.L., Lema, S.C., 2021. Widespread alterations to hypothalamic-pituitary-gonadal (HPG) axis signaling underlie high temperature reproductive inhibition in the eurythermal sheepshead minnow (Cyprinodon variegatus). Molecular and Cellular Endocrinology 537, 111447.

Lema, S.C., 2020. Hormones, developmental plasticity, and adaptive evolution: Endocrine flexibility as a catalyst for ‘plasticity-first’ phenotypic divergence. Molecular and Cellular Endocrinology 502, 110678.

Lema, S.C., Bock, S.L., Malley, M.M., Elkins, E.A., 2019. Warming waters beget smaller fish: evidence for reduced size and altered morphology in a desert fish following anthropogenic temperature change. Biology Letters 15, 20190518.

Hack, N.L., Cordova, K.L., Glaser, F.L., Journey, M.L., Resner, E.J., Hardy, K.M., Beckman, B.R., Lema, S.C., 2019. Interactions of long-term food ration variation and short-term fasting on insulin-like growth factor-1 (IGF-1) pathways in copper rockfish (Sebastes caurinus). General and Comparative Endocrinology 280, 168-184.

Lema, S.C., Washburn, E.H., Crowley, M.E., Carvalho, P.G., Egelston, J.N., McCormick, S.D., 2019. Evidence for a role of arginine vasotocin receptors in the gill during salinity acclimation by a euryhaline teleost fish. American Journal of Physiology - Regulatory, Integrative, and Comparative Physiology 316, R735-R750.

Lema, S.C., Carvalho, P.G., Egelston, J.N., Kelly, J.T., McCormick, S.D., 2018. Dynamics of gene expression responses for ion transport proteins and aquaporins in the gill of a euryhaline pupfish during freshwater and high-salinity acclimation. Physiological and Biochemical Zoology 91, 1148-1171.

Hack, N.L., Strobel, J.S., Journey, M.L., Beckman, B.R., Lema, S.C., 2018. Response of the insulin-like growth factor-1 (Igf1) system to nutritional status and growth rate variation in olive rockfish (Sebastes serranoides). Comparative Biochemistry and Physiology A 224, 42-52.

Lema, S.C., Chow, M.I., Resner, E.J., Westman, A.A., May, D., Dittman, A.H., Hardy, K.M., 2016. Metabolic and endocrine impacts of warming inland aquatic habitats: differential responses between recently-isolated populations of a eurythermal desert pupfish. Conservation Physiology 4, cow047.

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