Diverse habitats give rise to differing growth and feeding opportunities. We hypothesize that this variation increases the resilience of species (e.g. by broadening the phenological windows), but this is rarely empirically tested. Using stable isotope ratios we are estimating the habitat use, diet, phenology and relative success (condition, growth rate) of fish and cephalopods across freshwater and estuarine habitat mosaics and seascapes and linking this to variation in adult production and fisheries. 
 
Projects include Chinook salmon inhabiting the highly altered freshwater Sacramento-San Joaquin River Delta, Atlantic salmon and trout from streams across the UK, Ireland and Norway, European sea bass from the UK and Europe, plaice and sole across the UK, anchovies in Spain, and cephalopods in the English Channel.