The Impact of Stream Morphometric Factors on the Structure of Fish Communities

Izstrādātā bakalaura darba mērķis ir noteikt upes morfometrisko faktoru ietekmi uz ihtiocenožu struktūru. Lai to noskaidrotu, tika veikta zivju uzskaite, izmantojot elektrozvejas metodi. Apkopota informācija par Latvijas upēm, zivju sugām un morfometrisko faktoru ietekmi uz tām. Apskatīta arī zivju ieguve, izmantojot elektrozvejas metodi. Apskatīta ar zivsaimniecību un upēm saistītā likumdošana. Veikta rezultātu apkopošana, novērtēti visi 2007. gada fona monitoringa parauglaukumi un apkopoti to morfometriskie faktori.The aim of the Bachelor project is to determine the impact of rivers morphometric factors on the structure of fish communities. In order to do that, fry fish calculation has to be done. That’s why anode method will be used. Patterns will be obtained from slow-flowing rivers as well as from fast-flowing approximately from 70 cm depths. The main tasks of the Bachelor project are to summarize available information about Latvia’s rivers, fish species and the impact of morfometric factors. In the Bachelor project fish catching with anode method is also explored. The Bachelor project covers legislation connected with fish farming and rivers