Scientists at the SWFSC conduct research on many different aspects of physical and biological oceanography. These studies provide a way of monitoring ecosystem state and its variation, in space and time. They also provide a means to link organisms at higher trophic levels with this variation, which can significantly affect distribution, abundance, and ecology. Areas of research include developing methodologies for analyzing long-term trends and changes in both oceanographic and fisheries time series, developing new methods for relating changes in the ocean to changes in marine resource dynamics, and developing new methods of estimating fish population parameters that include oceanographic variables.  Ultimately, the goal of these studies is to provide guidance in the investigation of questions about stock identity, population trends and fishery interactions. The oceanographic studies reflect the interests and expertise of many researchers at the Southwest Fisheries Science Center, in all the divisions.  Links to several of these studies are listed below: