Marine fish ecology.

 

Our research addresses the fisheries, ecology and behavior of marine fishes.  These studies have included age and growth, reproduction, early-life-history, predator-prey relations, diet analysis, movements, behavioral interactions, and in general the effects of habitats both natural and artificial on the fish populations in the northern Gulf of Mexico.


PRESENT RESEARCH

photo-9 Cage group-with-snapper

Present research projects include:  1) The effects of explosive removal of oil-gas platforms on resident reef fishes in the northern Gulf of Mexico;  2) The habitat use and fine scale movements of red snapper, gray triggerfish, and shark species using ultrasonic telemetry;  3) A comparison of telemetry and conventional tagging of red snapper for mortality estimates;  4) The effects of the BP oil spill on shelf (e.g., red snapper) and slope (e.g., roughtongue bass) reef fish species;  5) A comparison of red snapper populations across a decade of management from 1998-2004 to 2010-2015 using fishery independent methods;  6) A comparison of fish communities on different artificial reef types at different depths using a combination of fishery independent methods, side scan sonar, and hydroacoustics;  7) Age determination of red snapper through shape analysis and validation of otolith annular increments;  8) The diet of red snapper using DNA analysis of gut content;  9) The early post-settlement ecology of northern Gulf of Mexico reef fish species.


PAST RESEARCH

DSC_0079 carrie_gasplatform-300x225 allison_becca-300x225

Past studies have included many aspects of marine fishes including but not limited to movements of coastal sharks, gray triggerfish ecology and behavior, early life history studies of red snapper, red snapper ecology, behavior, distributions, and habitat associations, and Blenniidae fish distributions on gas platforms.  See publications for more information on past studies.

Professional affiliations

  • American Fisheries Society
  • Marine fisheries section
  • Early life history section
  • American Society of Ichthyologists and Herpetologists

Publications

Williams-Grove, L.J., and S.T. Szedlmayer. In press. Depth preferences and three-dimensional movements of red snapper, Lutjanus campechanus, on an artificial reef in the northern Gulf of Mexico. Fisheries Research.

 

Williams-Grove, L.J., and S.T. Szedlmayer. In press. Mortality Estimates for Red Snapper, Lutjanus campechanus, based on Ultrasonic Telemetry in the Northern Gulf of Mexico. North American Journal of Fisheries Management.

 

Williams-Grove L.J. & Szedlmayer S.T. 2016.  Acoustic positioning and movement patterns of red snapper Lutjanus campechanus around artificial reefs in the northern Gulf of Mexico. Marine Ecology Progress Series 553, 233–251.

 

Williams, L.J., and Herbig, J.L., Szedlmayer, S.T. 2015. A cage release method to improve fish tagging studies. Fisheries Research 172: 125–129

 

Jaxion-Harm J., and Szedlmayer S.T. 2015. Depth and Artificial Reef Type Effects on Size and Distribution of Red Snapper in the Northern Gulf of Mexico, North American Journal of Fisheries Management, 35: 86-96, DOI: 10.1080/02755947.2014.982332

 

Piraino M.N., and Szedlmayer. S.T. 2014. Fine-scale movements and home ranges of red snapper Lutjanus campechanus around artificial reefs in the northern Gulf of Mexico. Transactions of the American Fisheries Society. 143:988-998.

 

Szedlmayer S.T., and P.A. Mudrak. 2014. Influence of age-1 conspecifics, sediment type, dissolved oxygen, and the Deepwater Horizon oil spill on recruitment of age-0 red snapper in 2010 and 2011, in the Northeast Gulf of Mexico. North American Journal of Fisheries Management. 34:443-452.

 

Topping D.T., and Szedlmayer S.T. 2013. Use of ultrasonic telemetry to estimate natural and fishing mortality of red snapper.  Transactions of the American Fisheries Society. 142:1090-1100.

 

Simmons CM and Szedlmayer ST. 2013. Description of reared preflexion gray triggerfish, Balistes capriscus, larvae from the northern Gulf of Mexico. Bulletin of Marine Science. 89:643-652.

 

Syc, T.S. and Szedlmayer, S.T. 2012. A comparison of size and age of red snapper (Lutjanus campechanus) with the age of artificial reefs in the northern Gulf of Mexico. U.S. Fishery Bulletin. 110:458–469.

 

Mudrak PA and Szedlmayer ST. 2012.  Proximity effects of larger resident fishes on recruitment of age-0 red snapper in the northern Gulf of Mexico. Transactions of the American Fisheries Society.  141:487-494.

 

Simmons CM and Szedlmayer ST. 2012. Territoriality, reproductive behavior and parental care in gray triggerfish, Balistes capriscus, from the northern Gulf of Mexico. Bulletin of Marine Science, 88(2): 197-209.  doi: 10.5343/bms.2011.1012

 

Topping DT and Szedlmayer ST. 2011. Home range and movement patterns of red snapper (Lutjanus campechanus) on artificial reefs. Fisheries Research, 112:77-84, doi:10.1016/j.fishres.2011.08.013

 

Topping DT and Szedlmayer ST. 2011. Site fidelity, residence time and movements of red snapper Lutjanus campechanus estimated with long-term acoustic monitoring. Marine Ecology Progress Series, 437:183-200, doi: 10.3354/meps09293

 

Szedlmayer ST.  2011. The artificial habitat as an accessory for improving estimates of juvenile reef fish abundance in fishery management. Pages 31-43.  In: S.A. Bortone, F.P. Brandini, G. Fabi, S. Otake, (eds.).  Artificial reefs in fishery management, CRC press, Boca Raton, FL. 332 p.

 

Simmons CM and Szedlmayer ST. 2011. Recruitment of Age-0 Gray Triggerfish to Benthic Structured Habitat in the Northern Gulf of Mexico. Transactions of the American Fisheries Society, 140:14-20.

 

Szedlmayer ST and Beyer SG. 2011. Validation of annual periodicity in otoliths of red snapper, Lutjanus campechanus. Environmental Biology of Fishes, 91:219-230, DOI 10.1007/s10641-011-9774-6

 

Beyer SG and Szedlmayer ST. 2010. The use of otolith shape analysis for ageing juvenile red snapper, Lutjanus campechanus. Environmental Biology of Fishes, 89:333-340.

 

Redman RA and Szedlmayer ST. 2009. The effects of epibenthic communities on reef fishes in the northern Gulf of Mexico. Fisheries Management and Ecology, 16:360-367.

 

Gallaway BJ and Szedlmayer ST, Gazey WJ.  2009.  A life history review for red snapper in the Gulf of Mexico with an evaluation of the importance of offshore petroleum platforms and other artificial reefs. Reviews in Fisheries Science, 17:48-67.

 

Chapin AM and Szedlmayer ST, Phelps RP.  2009.  Survival and movement of hatchery-reared red snapper on artificial habitats in the northern Gulf of Mexico. Fisheries Management and Ecology, 16:28-36.

 

Szedlmayer ST. 2007. An evaluation of the benefits of artificial habitats for red snapper, Lutjanus campechanus, in the northeast Gulf of Mexico. Proceedings of the Gulf and Caribbean Fisheries Institute, 59:223-230.

 

MacKichan CA and Szedlmayer ST. 2007. Reproductive behavior of the gray triggerfish, Balistes capriscus, in the northeastern Gulf of Mexico. Proceedings of the Gulf and Caribbean Fisheries Institute, 59:231-236.

 

Piko AA and Szedlmayer ST.  2007. Effects of habitat complexity and predator exclusion on the abundance of juvenile red snapper.  Journal of Fish Biology, 70:758-769.

 

Lingo ME and Szedlmayer ST. 2006. The influence of habitat complexity on reef fish communities in the northeastern Gulf of Mexico.  Environmental Biology of Fishes, 76:71-80.

 

Schroepfer RL and Szedlmayer ST. 2006. Estimates of residence and site fidelity for red snapper on artificial reefs in the northeastern Gulf of Mexico. Bulletin of Marine Science, 78(1):93-101.

 

Szedlmayer ST and Schroepfer RL.   2005.  Long-term residence of red snapper on artificial reefs in the northeastern Gulf of Mexico.  Transactions of the American Fisheries Society, 134: 315-325.

 

Gurshin C and Szedlmayer ST. 2004. Short-term survival and movements of small carcharhinid sharks after catch-and-release angling in the northeast Gulf of Mexico. Journal of Fish Biology, 65:973-986.

 

Topolski M and Szedlmayer ST.  2004.  Vertical distribution, size structure, and habitat associations of four Blenniidae species on gas platforms in the northcentral Gulf of Mexico. Environmental Biology of Fishes, 70:193-201.

 

Szedlmayer ST and Lee JD. 2004. Diet shifts of red snapper, Lutjanus campechanus, with changes in habitat and fish size. Fishery Bulletin, U.S., 102:366-375.

 

Ouzts AC and Szedlmayer ST. 2003. Diel feeding patterns of red snapper on artificial reefs in the northcentral Gulf of Mexico. Transactions of the American Fisheries Society, 132:1186-1193.

 

Szedlmayer ST and Conti JJ. 1999. Nursery habitats, growth rates, and seasonality of age-0 red snapper Lutjanus campechanus, in the northeast Gulf of Mexico. Fishery Bulletin, U.S., 97:626-635.

 

Szedlmayer ST.  1998.  Comparison of growth rate and formation of otolith increments in age-0 red snapper, Lutjanus campechanus. Journal of Fish Biology, 53:58-65.

 

Szedlmayer ST and Howe JC.  1997.  Substrate preference in age-0 red snapper Lutjanus campechanus. Environmental Biology of Fishes, 50:203-207.

 

Szedlmayer ST. 1997.  Ultrasonic telemetry of red snapper, Lutjanus campechanus, at artificial reef sites in the northeast Gulf of Mexico. Copeia, 1997(4):846-850.

 

Szedlmayer ST and Able KW.  1996.  Patterns of seasonal availability and habitat use by fishes and decapod crustaceans in a southern New Jersey estuary.  Estuaries, 19:697-709.

 

Szedlmayer ST and Howe JC. 1995. An evaluation of six marking methods for age-0 red drum, Sciaenops ocellatus. Fishery Bulletin, U.S., 93:191-195.

 

Maceina MJ, and Rider SJ, Szedlmayer ST.  1995.  Density, temporal spawning patterns, and growth of age-0 and age-1 largemouth bass (Micropterus salmoides) in vegetated and unvegetated areas of Lake Guntersville, Alabama. pp. 497-511.  In: D.C. Secor, J.M. Dean, and S.E. Campana, eds.  Recent developments in fish otolith research.  Univ. South Carolina Press, Columbia, SC.

 

Szedlmayer ST and Shipp RL.  1994.  Movement and growth of red snapper, Lutjanus campechanus from artificial reefs in the northeastern Gulf of Mexico.  Bulletin of Marine Science, 55:887-896.

 

Szedlmayer ST and Able KW.  1993.  Ultrasonic telemetry of age-0 summer flounder Paralichthys dentatus, in southern New Jersey estuary. Copeia, 1993(3):728-736.

 

Szedlmayer ST and Able KW.  1992.  Validation studies of daily increment formation for larval and juvenile summer flounder, Paralichthys dentatus. Canadian Journal of Fisheries and Aquatic Sciences, 49:1-7.

 

Szedlmayer ST, and Able KW, Rountree RA.  1992.  Growth and temperature induced mortality of young-of-the-year Summer flounder (Paralichthys dentatus) in Southern New Jersey. Copeia, 1992(1):120-128.

 

Szedlmayer ST.  1991.  Distribution and abundance of nearshore fishes in the Anclote River estuary, west‑central, Florida. Northeast Gulf Science, 12:75-82.

 

Szedlmayer ST, and Szedlmayer MM, Sieracki ME.  1991. Automated enumeration by computer digitization of age-0 weakfish Cynoscion regalis scale circuli. Fishery Bulletin, U.S., 89:337-340.

 

Szedlmayer ST, and Able KW, Musick JA, Weinstein MP. 1991. Are scale circuli deposited daily in juvenile weakfish, Cynoscion regalis? Environmental Biology of Fishes, 31:87-94.

 

Szedlmayer ST, and Weinstein MP, Musick JA. 1990. Differential growth among cohorts of age-0 weakfish Cynoscion regalis in Chesapeake Bay. Fishery Bulletin, U.S., 88:745-752.

 

Szedlmayer ST. 1987. Hormone‑induced spawning of weakfish. The Progressive Fish‑Culturist, 49:158‑160.

 

Weinstein MP, and Scott L, O’Neil SP, Siegfried II RC, Szedlmayer ST. 1984. Population dynamics of spot,  Leiostomus xanthurus, in polyhaline tidal creeks of the York River estuary, Virginia. Estuaries, 7(4a):444‑450.