Kurt Pinter

• BOKU University

Animals in aquatic ecosystems impacted by global changes often face reduced availability of vital organic compounds, such as omega-3 polyunsaturated fatty acids (n-3 LC-PUFA), vital for brain development and cognition. Cognitive skills are crucial for buffering the impacts of environmental stress on fitness, yet the link between the quality of diet...

In the River Traun in Austria, diseased European chub Squalius cephalus were observed for several years. In 2019, an investigation of the condition revealed the presence of several myxozoan species in different tissues, without evidence of other pathogens. The most prevalent and abundant myxozoan parasite in the different organs was Myxobolus ellip...

Zusammenfassung Die negativen Auswirkungen schwallbelasteter Fließgewässer auf juvenile Äschen ( Thymallus thymallus ) sind weitgehend bekannt. Für andere Altersstadien sind bisher nur wenige wissenschaftliche Untersuchungen verfügbar. Diese Studie konzentriert sich auf die Habitatwahl adulter Äschen im Oberen Inn. Mithilfe von telemetrischen Stand...

Zusammenfassung Die Problematik, dass Stauräume zunehmend verlanden, erfordert zukünftig auch verstärkte wissenschaftliche Forschung, die letztendlich zur Konzeption nachhaltiger und ökologisch verträglicher Sedimentmanagementkonzepte beitragen soll. Bestehende Studien beleuchten vor allem technische Aspekte des Sedimentmanagements, detaillierte Un...

Underwater cameras were used to record and describe, for the first time, the spawning behaviour of the lake charr (Salvelinus umbla) in an Alpine stream (Oberer Lunzer Seebach, Austria). The results were then compared with other Salvelinus species reported in the literature. Unlike other Salvelinus species, lake charr females do not perform the typ...

Tributaries play a vital role in fish spawning and recruitment, significantly influencing mainstem river fish populations. However, in the Anthropocene era, tributaries within river networks suffered ecological degradation due to fragmentation and channelization. This has led to reduced distribution ranges and declining populations of various river...

The Danube Salmon Hucho hucho , endemic to the Danube River basin, is one of the largest members of the salmonid family. Here, we describe the distribution, ecology, and status of this flagship species in the upper Danube River basin. We model the historical distribution of Danube Salmon in the Austrian Danube River basin based on a review of the l...

Habitat niches of fish species can exert a strong influence on population structure, even on a small geographical scale. In this scope, Pelasgus thesproticus is a great model species to study connectivity in riverine environments owing to its naturally patchy habitat distribution. Furthermore, it is important to conduct such studies in near-natural...

Fish were sampled at nine locations of the upper Neretva River, upstream of Glavatičevo. Evidence of the endangered softmouth trout (Salmo obtusirostris) was obtained as well as the presence of other native and non-native salmonids. Genetic analysis suggests that the native brown trout (Salmo trutta) in the upper Neretva is homogeneous with no sign...

Originally, the Danube salmon (Hucho hucho) occurred in Bavaria and Austria in more than 250 rivers occupying more than 7,400 km of rivers. Nowadays, populations in »very good« and »good« status exist in only 0.7 % and 7.1 % of the original distribution. Therefore, the Danube salmon is classified as an endangered species. Due to ongoing stock decli...

Source: https://www.springerprofessional.de/zur-bedeutung-des-abflusses-auf-die-wanderung-der-seeforelle/24234980 The study examined the barely investigated upstream and downstream migration of the lake-run brown trout (Salmo trutta) in the Hasliaare in Switzerland. The video monitoring setup of two resistivity fish counters and a multi-spectral u...

Migration patterns and habitat use of adult barbel ( Barbus barbus ) and nase ( Chondrostoma nasus ) were monitored by radio telemetry over a period of 13 months along a 58-km-long section of the Austrian part of the Danube River. The study site is confined upstream and downstream by two hydropower plants, and contains a larger tributary, the Piela...

An open river continuum is central to the life cycle of many migratory fish species, such as the barbel (Barbus barbus) or the nase (Chondrostoma nasus). Although the passability of rivers has been a key topic for several years, the longitudinal connectivity of about half of the Austrian water bodies is still limited. In addition, watercourses that...

In this study the effects of abiotic factors (discharge, water temperature, turbidity, light and weather conditions) on the behaviour of lake running brown trout (Salmo trutta) during spawning up- and downstream migration in the Hasliaare, Switzerland, were investigated. Trouts were counted during spawning migration in a residual flow section of th...

In spite of growing evidence pointing to ecological and genetic risks to wild fish populations, artificial propagation and stocking remain common practices for recreational fishery management. Moreover, even a cursory level of monitoring and evaluation of these risks is neglected, especially where fisheries are managed by private entities. Against...

Knowledge on predator diet and drivers of prey selection is particularly of interest for an efficient management of predator and prey populations where predators potentially compete with humans for resources. Actual or perceived predation by Eurasian otter ( Lutra lutra ) on fish stocks generates conflicts in many countries. Recently, conflicts are...

Periodic assessment of harvested fish populations is essential for their sustainable management. A potential alternative to costly and resource‐intensive electrofishing estimates in clearwater streams is the noninvasive snorkeling method. To assess the utility of snorkeling for the angling community, we compared underwater fish counts carried out b...

The first evidence of proliferative kidney disease (PKD) in an Austrian river (the River Kamp) was documented in 2016, and no information on the PKD infection status of trout in other rivers was available. Since then, brown trout (Salmo trutta fario) and rainbow trout (Oncorhynchus mykiss) have been collected from rivers in Upper and Lower Austria...

Fishing is an ancient practice in the acquisition of natural resources dating back to the Middle Stone Age. The principal reasons why humans visit waters to catch fish underwent a substantial transition in many countries throughout the preceding decades. While fishing to gain food still is an important factor in tropical areas of the world, especia...

Zusammenfassung Der Unterlauf der Traisen wurde von 2012 bis 2016 im Rahmen eines LIFE+ Projektes auf rund 10 km Länge gänzlich neu gestaltet. Dabei wurde der alte kanalisierte Arm mit mehreren Sohlschwellen als Altwasser bzw. Überwasserkanal erhalten und ein völlig neuer, naturnaher Lauf durch den Auwald angelegt. Das begleitende Monitoring der Fi...

Management of brown trout populations is a necessity wherever human activities negatively impact trout habitats, or recreational fisheries use trout stocks in an unsustainable way. In many European waterbodies combinations and overlap of both habitat degradation and inappropriate fisheries management occur simultaneously, thus presenting an increas...

In two consecutive years, we sampled twelve habitat units of a fourth-order Austrian mountain stream by snorkeling and electrofishing to estimate the strength of daytime snorkeling versus electrofishing. The number of salmonids counted by snorkeling correlated with abundance estimates determined by electrofishing (R2 = 0.77). The results showed spe...

Over the last 50 years stocking of fish has achieved great importance in the management of fisheries. A major concern of this development is that stocking may disrupt the genetic and ecological integrity of wild populations, which can lead to further declines of natural stocks. We present a study on the artificial propagation of brown trout (Salmo...

During samplings in 2014 several specimens of a gudgeon-like fish were caught in the Mur River which differed from sympatric Gobio obtusirostris through their large fins, elongated body shape and habitat use. Morphological studies showed that these specimens did not belong to any of the three Romanogobio species native in Austria. Preliminary DNA b...

Various human pressures are affecting the aquatic biocoenosis in running waters of Iran - similar to many other areas of the world. Overall 190 sites, 88 at salmonid (44 reference/impacted respectively) and 102 at cyprinid (50 reference/52 impacted) streams of the southern Caspian Sea basin were investigated in terms of human pressures present and...

A camera inside an underwater housing was used to record a pair of Danube huchen, Hucho hucho (L.) spawning at the Ybbs River, Austria. A description of spawning behaviour is made including observations of two other Danube huchen pairs recorded at the Rivers Mur and Pielach. Results were compared with the spawning behaviour of Siberian taimen, Huch...

In this study a time- and cost effective method for marking early life stages of brown trout (Salmotrutta L.) with alizarin red S (ARS) is presented. The main intention was the development of a protocol to mark embryos. When stocking eyed-eggs, later recognition depends on an adequate tagging method featuring reasonable expenditures, low mortality...

The fishery association, Die Bewirtschafter, founded in 2007 and run by a managing board consisting of the authors, studies a broad range of questions related to fish-and freshwater ecology. In addition to the preservation of intact water systems it aims to dis-seminate scientific results and studies. To further this aim, an annual scientific mono-...

The redds of brown trout (Salmo trutta), the most common fish species of Austria, were monitored in two geologically different reaches in 2010 and 2011. The Große Mühl River (5th order) originates in the Bohemian mountains (1.160 m.s.l.). River morphology is classified as ‘plane bed’, discrete bars are missing, the substrate is dominated by cobbles...

In Austria, brown trout (Salmo trutta L.) is an intensively stocked species. A major concern on this activity is that stocking disrupts the genetic integrity of wild populations and may lead to a further decline of natural stocks. Understanding the current processes of artificial propagation is paramount for the development of sound and conservatio...