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Stephen T. Tettelbach

Professor of Biology

B.S., University of MiamiM.S., University of WashingtonPh.D., University of Connecticut


I have conducted research on bay scallops for over 40 years - on topics including restoration, larval biology, population ecology, predator-prey interactions, impacts of brown tide algal blooms, and aquaculture. Dozens of students (undergraduate, graduate, high school) have worked with over most of this time span. Our research seeks to better understand how and why marine populations vary in a changing environment; in turn, we have applied our findings toward the development and improvement of management and culture strategies for commercially important shellfish species. In particular, as part of our bay scallop restoration efforts in eastern Long Island waters (for which I have been co-leader since 2005), we have worked to develop and improve techniques for planting bay scallops and enhancing their survival, growth and reproductive success. This work has contributed significantly to increases in larval recruitment and has helped rebuild populations and the commercial scallop fishery of New York. Since we commenced our restoration efforts in 2006, revenues to fishermen, over and above the baseline average before restoration, have increased by >$8 million; with economic multipliers, the value to the local economy of the higher fisheries harvest is estimated at >$80 million (through 2016). As such, this is one of the most successful shellfish restoration projects ever documented. As part of our restoration work, and other field research, we do a great deal of Scuba diving. This extensive field work has also helped us to document new discoveries about the basic biology and ecology of several marine species.

My current research projects include: restoration of Peconic bay scallop populations and fisheries; habitat utilization by juvenile bay scallops; age, growth and initial reproductive maturity of the channeled whelk; predation of planted bay scallops by channeled whelk; and locomotory behavior of adult hard clams. Many of my students are co-authors on publications. For further details of research and teaching activities, please visit:


Shellfish Restoration, Bay Scallops, Mollusks, Marine Biology, Fisheries Biology, Aquaculture, Coral Reef Ecology, Scuba Diving


Tettelbach, S.T., J.R. Europe, C.R.H. Tettelbach, J. Havelin, B.S. Rodgers, B.T. Furman, M. Velasquez. 2017. Hard clam walking: active horizontal locomotion of adult Mercenaria mercenaria at the sediment surface and behavioral suppression after extensive sampling. PLoS ONE 12(3):e0173626.doi:10.1371/journal.pone.0173626.

      Tettelbach S.T., B.J. Peterson, J.M. Carroll, B.T. Furman, S.W.T. Hughes, J. Havelin, J.R. Europe, D.M. Bonal, A.J. Weinstock & C.F. Smith. 2015. Aspiring to an altered stable state: rebuilding of bay scallop populations and fisheries following intensive restoration. Marine Ecology Progress Series 529:121-136.

      Tettelbach, S.T., K. Tetrault & J. Carroll. 2014. Efficacy of Netminder® silicone release coating for biofouling reduction in bay scallop grow-out and comparative effects on scallop survival, growth and reproduction. Aquaculture Research 45:234-242.

      Tettelbach S.T., B.J. Peterson, J.M. Carroll, S.W.T. Hughes, D.M. Bonal, A.J. Weinstock, J.R. Europe, B.T. Furman & C.F. Smith. 2013. Priming the larval pump: resurgence of bay scallop recruitment following initiation of intensive restoration efforts. Marine Ecology Progress Series 478:153-172.

      Carroll, J.M., B.T. Furman, S.T. Tettelbach, B.J. Peterson. 2012. Balancing the edge effects budget: bay scallop settlement and loss along a seagrass edge. Ecology 93:1637–1647.

      Tettelbach, S.T., D. Barnes, J. Aldred, G. Rivara, D. Bonal, A. Weinstock, C. Fitzsimons-Diaz, J. Thiel, M.C. Cammarota, A. Stark, K. Wejnert, R. Ames, J. Carroll. 2011. Utility of high density plantings in bay scallop, Argopecten irradians irradians, restoration. Aquaculture International. 19(4):715-739.

      Carroll, J. M., B. J. Peterson, D. Bonal, A. Weinstock, C. F. Smith and S. T. Tettelbach. 2010. Comparative survival of bay scallops in eelgrass and the introduced alga, Codium fragile, in a New York estuary. Marine Biology 157:249–259.

      Newell, R. I. E., S. T. Tettelbach, C. J. Gobler, and D. G. Kimmel. 2009.  Relationships between reproduction in suspension-feeding hard clams Mercenaria mercenaria and phytoplankton community structure. Marine Ecology Progress Series 387:179-196.

      Tettelbach, S. T. and C. F. Smith. 2009. Bay scallop restoration in New York. Ecological Restoration 27(1):20-22. 

     Tettelbach, S. T. and A. Weinstock. 2008. Direct observation of bay scallop spawning in New York waters. Bulletin of Marine Science 28(2): 213-219.


David Newton Award for Excellence in Teaching, Long Island University

Environmental Champion Award, North Fork Environmental Council (NY)

Who’s Who Among America’s Teachers

Outstanding Cooperator Award, Cornell Cooperative Extension of Suf­folk County (NY)

Thurlow C. Nelson Award for Best Student Paper, 78th Annual Meeting of the National Shell­fisheries Association

Elected to Phi Kappa Phi Honorary Society

Elected to Delta Theta Mu Biology Honorary Society

Scholar-Athlete Award for Varsity Soccer Team, Univers­ity of Miami

Professional Affliations

Member and former Treasurer, Vice-President, President-Elect, President, National Shellfisheries Association

Member, American Association for the Advance­ment of Science

Member, Conchologists of America