Cecilia Pinto, University of Aberdeen, will present. The flapper skate used to be a widely distributed species across the North East Atlantic. Due to its large size since birth (20 cm) this species was constantly caught as by-catch by both trawling and long line fisheries, therefore suffering a 90% decline in the last 40 years. The West Coast of Scotland hosts a number of relict populations in its sea lochs. Multi-site capture recapture data, vertical movement data and scientific survey data where analyzed to estimate apparent survival, site fidelity, water column exploitation and habitat preferences. Because of the sparse nature of the multisite capture-recapture data a model accounting for transients and heterogeneity of effort through time and space was developed in a Bayesian framework. In order to account for high memory processes a Markov switching autoregressive model was applied to analyse time series of individual vertical movement. The combination of all the different estimates will be informing an individual based model in order to define possible conservation measures under different scenarios of fishing effort.