Data

Data from all projects are stored in relational database (PostgreSQL) which facilitates access, ensures consistency and with PostGIS extension enables effective processing of spatial datasets. All devices used (receivers, antennas, tags) have its specification stored with information about their deployment and temporal settings. Species, standard and total length, weight and sex were recorded for each fish upon each capture. Detailed description of the tagging procedure is also available for most of our tagged fish.

Database also contains measurements of surface environmental factors during each project period, including temperature, light, wind speed and direction, pressure and precipitation measured in no less than 1 hour intervals. Moreover, stratification of temperature and light were measured on several localities on the lake, at each 0.7m depth interval, and once each 5 minutes. Other abiotic and biotic factors such as nitrogen gradient,  zooplankton composition, transparency, oxygen stratification, and macrophyte coverage can be obtained thanks to close collaboration with Hydrobiology institute and Fishecu, where our research group is located. These data also comprise long term description of fish population structure from standard annual sampling (gillneting, fry seining, adult seining, fry trawling, echosounding) and data from fish stocking carried out in collaboration with Czech River Water Authority.

Maybe quick summary and description:

In total, around 400 individuals from eight different species (wels, pike, roach, bream, pikeperch, perch, tench, rudd) were tagged by active tags. All datasets from active telemetry projects comprise in total approximately 100 000 fish-days of continuous tracking. Projects were carried out on relatively small lakes (~ 200 ha)  which enabled almost full coverage by our system, and resulted in a unique dataset, with very high presence rate. For more detailed information, please see projects.