Tracking fish with electronic tags

Inferring vertical and horizontal movements of juvenile marine turtles from time-depth recorders

“…crepuscular diving, preference for turbid water, or non-migratory behaviour). It has, however, been possible to use TDR data, alongside environmental data, to reconstruct the migratory routes of freeranging fish species (Metcalfe & Arnold 1997, Hunter et al 2003, Hunter et al 2006, Righton & Mills 2008.…”

Movements of Marine Fish and Decapod Crustaceans: Process, Theory and Application

“…DSTs allow us to reconstruct the tracks of individual animals for longer periods than would usually be feasible with acoustic tags. For example, tags engineered by CEFAS (Centre for Environment, Fisheries and Aquaculture Science, UK) and Lotek Marine Technologies Inc. are capable of storing over 500 000 data samples for periods of up to 25 years (Metcalfe and Arnold, 1997;Turner et al, 2002). The continuous monitoring of environmental variables, such as depth, light, salinity and temperature make it possible to reconstruct the tracks of animals, estimating the time, place and directionality of movements (Friere and González-Gurriarán, 1998).…”

“…Using DSTs Metcalfe and Arnold (1997) revealed that some mature female plaice (Pleuronectes platessa) visited more than one spawning area within a single spawning season and that rates of movement were often as much as ten times faster than those estimated using conventional mark-recapture experiments. Arnold and Holford (1995) combined information from DSTs from several fish species with interpolated tidal stream vectors to predict rates and scales of movement of demersal fish in the North Sea and English Channel.…”

Link between vertical and horizontal movement patterns of cod in the North Sea

“…Hydrostatic (tidal) data, derived from the sinusoidal pressure cycle recorded in the depth data when a fish is at rest on the seafloor, was used to enable the geographical reconstruction of a cod's movements (hereinafter termed geolocation). This method is referred to as the tidal location method (TLM, as described in Metcalfe & Arnold 1997;Hunter et al 2004b). We used a novel Fokker-Planck-based method that combines the TLM with a hidden Markov model to estimate, for each day at liberty, the non-parametric probability distribution of geographic position (for details see Pedersen et al 2008).…”