Past Graduate Student

Stan Kotwicki is a Research Fishery Biologist in Resource Assessment and Conservation Engineering Division at the Alaska Fisheries Science Center. His work encompasses planning for and conducting groundfish surveys in the eastern Bering Sea, taking part in the walleye pollock stock assessment process by providing survey derived population estimates for stock assessment models, and performing research relevant to Alaska fisheries. His research focuses on improving methods to estimate abundance of fish stocks from data collected during bottom trawl and acoustic surveys. His completed research on demersal species includes assessing bottom trawl selectivity and catchability, evaluating the effect of autotrawl systems on trawl performance, identifying factors influencing trawl geometry and improving methods for area-swept estimates. His research on semipelagic species includes development of the methods for obtaining abundance estimates from combined bottom trawl and acoustic surveys.

Publications

• Kotwicki, S, Ianelli, JN, Punt, AE. 2014. Correcting density-dependent effects in abundance estimates from bottom trawl surveys. ICES J. Mar. Sci. 71:1107-1116. doi:10.1093/icesjms/fst208.
• Kotwicki, S, De Robertis, A, Ianelli, JN, Punt, AE, Horne, JK. 2013. Combining bottom trawl and acoustic data to model acoustic dead zone correction and bottom trawl efficiency parameters for semi-pelagic species. Can. J. Fish. Aquat. Sci. 70: 208-219. doi:10.1139/cjfas-2012-0321.