<abstract xmlns="http://www.w3.org/1999/xhtml"><p>During the last century a large portion of small and medium-sized rivers in Latvia were channelized, hydroelectric power stations were also built, which led to changes in the hydrodynamic conditions, geomorphological structure, as well as a change in the fish fauna. Fish are an integral part of any community in natural or man-made bodies of water. They actively participate in maintaining the system, balancing/equilibrium, energy, substance transformation and biomass production. They are able to influence other organisms in the ecosystem in which they live. The aim of the paper “Pike distribution and feeding comparisons in natural and historically channelized river sections” is to find out what pike feed on in different environments in Latvian rivers, such as natural and straightened river sections, as well as what main factors determine the composition of their food. Several points were assessed during the course of the study: the impact of environmental conditions on the feeding habits and the distribution of pike; the general feeding habits of predators in Latvian rivers; the feeding differences of predators in natural and straightened river sections; and lastly, rhithral and pothamal habitats were compared. The study was based on data from 2014 and 2015 on fish fauna monitoring. During the study, 347 pike were collected from 136 plots using electrofishing method.</p></abstract>

During the last century a large portion of small and medium-sized rivers in Latvia were channelized, hydroelectric power stations were also built, which led to changes in the hydrodynamic conditions, geomorphological structure, as well as a change in the fish fauna. Fish are an integral part of any community in natural or man-made bodies of water. They actively participate in maintaining the system, balancing/equilibrium, energy, substance transformation and biomass production. They are able to influence other organisms in the ecosystem in which they live. The aim of the paper “Pike distribution and feeding comparisons in natural and historically channelized river sections” is to find out what pike feed on in different environments in Latvian rivers, such as natural and straightened river sections, as well as what main factors determine the composition of their food. Several points were assessed during the course of the study: the impact of environmental conditions on the feeding habits and the distribution of pike; the general feeding habits of predators in Latvian rivers; the feeding differences of predators in natural and straightened river sections; and lastly, rhithral and pothamal habitats were compared. The study was based on data from 2014 and 2015 on fish fauna monitoring. During the study, 347 pike were collected from 136 plots using electrofishing method.

Pike <italic>Esox Lucius</italic> Distribution and Feeding Comparisons in Natural and Historically Channelized River Sections

Institute of Energy Systems and Environment, Riga Technical University, Azenes iela 12/1, Riga, LV–1048,

Environmental and Climate Technologies

This work is licensed under the Creative Commons Attribution 4.0 Public License.

Pike  Distribution and Feeding Comparisons in Natural and Historically Channelized River Sections

During the last century a large portion of small and medium-sized rivers in Latvia were channelized, hydroelectric power stations were also built, which led to...

Pike Esox Lucius Distribution and Feeding Comparisons in Natural and Historically Channelized River Sections

Published Online: Jan 27, 2017

Page range: 33 - 41

DOI: https://doi.org/10.1515/rtuect-2016-0011

Keywords
Pike, feeding, pothamal, channelized, river

© 2016 Riga Technical University

This work is licensed under the Creative Commons Attribution 4.0 Public License.

Pike Esox Lucius Distribution and Feeding Comparisons in Natural and Historically Channelized River Sections

Published Online: Jan 27, 2017

Page range: 33 - 41

DOI: https://doi.org/10.1515/rtuect-2016-0011

KeywordsPike, feeding, pothamal, channelized, river

© 2016 Riga Technical University

This work is licensed under the Creative Commons Attribution 4.0 Public License.

Keywords
Pike, feeding, pothamal, channelized, river