Projects / Programmes source: ARIS

Development and application of software for the determination of brown trout (Salmo trutta) habitat suitability and determination of measures for brown trout habitat improvement

Research activity

Code Science Field Subfield
1.03.03  Natural sciences and mathematics  Biology  Ecosystems 

Code Science Field
B260  Biomedical sciences  Hydrobiology, marine biology, aquatic ecology, limnology 

Code Science Field
4.01  Agricultural and Veterinary Sciences  Agriculture, Forestry and Fisheries 
brown trout, habitat, fishery resource, hydraulic modeling, habitat modeling, improvement measures,
Evaluation (rules)
source: COBISS
Researchers (12)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  31478  Maša Čarf  Biology  Researcher  2011 - 2013  20 
2.  30550  Aljaž Jenič  Biology  Researcher  2011 - 2013  57 
3.  27764  PhD Daniel Kozelj  Hydrology  Researcher  2011 - 2013  159 
4.  30549  Tomaž Modic    Technical associate  2011 - 2013 
5.  26112  PhD Gorazd Novak  Hydrology  Technical associate  2011 - 2013  130 
6.  35215  Nastja Pajk  Biology  Researcher  2012 - 2013 
7.  15318  PhD Samo Podgornik  Biology  Researcher  2011 - 2013  114 
8.  29190  PhD Gašper Rak  Hydrology  Researcher  2011 - 2013  260 
9.  30548  Lucija Ramšak  Biology  Researcher  2011 
10.  09274  PhD Franc Steinman  Hydrology  Head  2011 - 2013  843 
11.  27766  PhD Sašo Šantl  Hydrology  Researcher  2011 - 2013  175 
12.  30391  Tone Tavčar    Technical associate  2011 
Organisations (2)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  0414  Fisheries Research Institute of Slovenia  Ljubljana - Šmartno  5164117  233 
2.  0792  University of Ljubljana, Faculty of Civil and Geodetic Engineering  Ljubljana  1626981  25,901 
Danube type brown trout (Salmo trutta) is native fish species in Slovenia. Brown trout is native to the Danube river basin and it inhabits all Danube basin rivers and streams of Slovenia and therefore it is also one of the most important native freshwater fish species considering human nutrition. Despite the repopulation of streams with juvenile brown trout a considerable reduction of brown trout populations is observed every year. Consequently, fishery resources are also reduced. The reduction of brown trout populations and reduction of fishery resources is the effect of different stream morphology modifications and water abstractions, which result in long-term modification of stream hydromorphology. The basis for the study in question is assessment and determination of brown trout (Salmo trutta) habitat suitability which is very difficult because of deficient methodology and complexity of evaluation of stream hydraulic parameters, such as discharge, velocity and water depth and other hydromorphologic stream parameters. Based on the determined habitat suitability, considering hydraulic and hydromorphologic stream parameters, a computer supported habitat model will be created in this research project. Also, the environmentally acceptable flow will be analysed considering additional possible mitigation measures. As a result of the study analysis the ground for further conservation and restoration of fishery resources through adoption of mitigation measures will be possible. Protection of the existing brown trout populations can be achieved or improved by preservation and conservation of habitat suitability that enables the existence of brown trout populations in streams.
Significance for science
Habitat modelling approaches slowly gains its position around the world. In recent years, the main activities are focused on the field of calibration of various concept models and verification of this approach on real situations. Slovenian investigation provides an adequate basis for comparative analyzes in the wider Alpine area for river stretches where brown trout (Salmo truta) are the representative fish population. In addition, it presents new possibilities for applications in the field of mitigation measures planning on watercourses with heavy water abstraction impact.
Significance for the country
Within this project habitat modeling was for the first time introduced in Slovenia from research and applicative perspective as well. The method and the tool give an efficient, objective in repeatable basis for proper decision making on determination of ecologically acceptable flow and for evaluation of intended measures on watercourses. The results support further method development and introduction of the method to analyses habitat suitability of other representative fish species.
Most important scientific results Annual report 2011, 2012, final report, complete report on dLib.si
Most important socioeconomically and culturally relevant results Annual report 2012, final report, complete report on dLib.si
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