This dataset evaluates microbial responses to pharmaceuticals in agricultural soils which may imp... more This dataset evaluates microbial responses to pharmaceuticals in agricultural soils which may improve essentially our understanding of micropollutants fate and their potential implications to the environmental and human health. In this study, we focused on immediate (1 d), short- (13 d) and long-term effects (61 d) of pharmaceuticals amendment on microbial changes in seven soils differing in physical chemical properties. The data include dictionaries of used soils, treatments, parent compounds and their metabolites, and measured fatty acids. Degradation of the individual pharmaceuticals as well as their mixture are shown in folder "analytics", and raw observation data for basal respiration and phospholipid fatty acids are given in respiration.csv and PLFA.csv. The code to run these data will be publicly open on GitHub upon publishing the scientific article of the same name.
To understand the conditions of coexistence in multiple-species predator community, we studied lo... more To understand the conditions of coexistence in multiple-species predator community, we studied longitudinal and vertical movement of pike (Esox lucius), pikeperch (Sander lucioperca) and catfish (Silurus glanis) in the Římov Reservoir, using an autonomous telemetry system for 11 months. We found significant differences among these three species in movement and depth that varied considerably in time, with the greatest differences between warm (late spring and early autumn) and cold season (late autumn to early spring). Preference for different sections of the reservoir was stable for pike, while pikeperch and catfish frequently visited tributary during the warm season, and moved closer to the dam during the cold season. Pike longitudinal activity was highest in the cold season, pikeperch in the warm season, and catfish activity peaked in both the warm and cold seasons. Overlap in the depth used among species was higher in the warm season, when all species used the upper layer of the ...
Fish communities differ significantly between the littoral and the pelagic habitats. This paper a... more Fish communities differ significantly between the littoral and the pelagic habitats. This paper attempts to define the shift in communities between the two habitats based on the European standard gillnet catch. We sampled the benthic and pelagic habitats from shore to shore in Lake Most and Římov Reservoir (Czech Republic). The 3 m deep pelagic nets were spanned across the water body at equal distances from two boundary points, where the depth was 3.5 m. The benthic community contained more fish, more species, and smaller individuals. The mild sloped littoral with a soft bottom attracted more fish than the sloping bank with a hard bottom and less benthos and large Daphnia. The catch of the pelagic nets was dominated by eurytopic fish—rudd (Scardinius erythrophthalmus) and roach (Rutilus rutilus) in Most and bleak (Alburnus alburnus) in Římov. With the exception of one case where overgrown macrophytes extended the structured habitat, the largest shift from the benthic to the pelagic ...
Movement ecology is increasingly relying on experimental approaches and hypothesis testing to rev... more Movement ecology is increasingly relying on experimental approaches and hypothesis testing to reveal how, when, where, why, and which animals move. Movement of megafauna is inherently interesting but many of the fundamental questions of movement ecology can be efficiently tested in study systems with high degrees of control. Lakes can be seen as microcosms for studying ecological processes and the use of high-resolution positioning systems to triangulate exact coordinates of fish, along with sensors that relay information about depth, temperature, acceleration, predation, and more, can be used to answer some of movement ecology’s most pressing questions. We describe how key questions in animal movement have been approached and how experiments can be designed to gather information about movement processes to answer questions about the physiological, genetic, and environmental drivers of movement using lakes. We submit that whole lake telemetry studies have a key role to play not only...
Repeat spawners constitute an important component of Atlantic salmon populations, but survival of... more Repeat spawners constitute an important component of Atlantic salmon populations, but survival of post-spawning individuals (kelts) are often compromised by anthropogenic structures such as hydropower plants (HPPs). Potential effects of HPPs include migration delays and associated increased energy depletion, which potentially results in increased overall mortality. We combined a detailed 3D hydraulic model with high-resolution 3D tracking of tagged kelts (length 73–104 cm) to obtain estimates of kelt movement through water. These estimates were then used in an energetics model to estimate hourly energy expenditure while negotiating the HPP area. Hourly kelt energy expenditure varied between 0.8 and 10.1 kJ × h−1 and was dependent on kelt length. Degree of additional energy depletion can amount to several percent of remaining energy content (our study indicates 4–5 percentage points) potentially leading to reduced post-spawning survival. In turn, this can nullify the iteroparous bree...
Bothriocephalidean cestodes reported from lizardfish (Saurida Valenciennes in Cuvier & Valencienn... more Bothriocephalidean cestodes reported from lizardfish (Saurida Valenciennes in Cuvier & Valenciennes) were revised on the basis of newly collected material from type-hosts and available typeand voucher specimens. Instead of nine taxa of four genera listed in the literature, only Oncodiscus sauridae Yamaguti, 1934 and Penetrocephalus ganapattii (Rao, 1954) are considered valid and thus both genera become monotypic. Both taxa are redescribed, including the first scanning electron micrographs and data on intraspecific variability. Both species are unique among bothriocephalid cestodes in the lateral position of the vagina in relation to the cirrus-sac. Oncodiscus sauridae found in Saurida longimanus Norman, S. nebulosa Valenciennes (new host record), S. tumbil (Bloch) and S. undosquamis (Richardson) differs from P. ganapattii found in S. micropectoralis Shindo & Yamanda and S. tumbil in the following characters: (i) scolex shape (fan-shaped, with crenulated bothrial margins in O. saurid...
The higher proportion of males of the invasive round goby Neogobius melanostomus in samples from ... more The higher proportion of males of the invasive round goby Neogobius melanostomus in samples from two activity selective passive fishing gears compared with one activity non-selective fishing gear in three Dutch lakes is related to higher male locomotory activity and is a sex-dependent trait. This difference in activity reflects the different ecology of male and female N. melanostomus.
Piscivory in cyprinids (Cyprinidae) is extremely rare. Specifically, common bream (Abramis brama)... more Piscivory in cyprinids (Cyprinidae) is extremely rare. Specifically, common bream (Abramis brama) and common carp (Cyprinus carpio) are zooplanktivorous fish in deep lentic waters. Nevertheless, we observed predation by these two cyprinids under natural conditions in the Vír Reservoir, Czech Republic. We conducted diet analysis for cyprinids caught by trawling and gillnets and the large amount of young-of-the-year (YOY) perch (Perca fluviatilis), with sizes of 37-52 mm standard length, were found in their digestive tracts. In 2010, a large amount of YOY perch caused a significant decrease in Daphnia spp. size and abundance in the reservoir. Hence, a food deficit was induced for the cyprinids, apparent also from the poor nutritional condition of common bream which was much worse than the condition of those in similar reservoirs. Common carp and common bream shifted to forced piscivory, and they utilized the YOY perch as an alternative food source. In contrast, smaller species, such a...
Direct observation of fish avoidance behaviour with respect to an active pelagic trawl is challen... more Direct observation of fish avoidance behaviour with respect to an active pelagic trawl is challenging. A DIDSON acoustic camera was used for direct observation of the fish avoidance behaviour in front of the mouth of an active pelagic surface trawl in the mesotrophic Czech reservoir Zelivka. Based on their reaction and swimming behaviour towards the active trawl the fish (n = 1051) displayed very heterogeneous behavioural patterns, which were classified in 11 different categories of avoidance behaviour. The avoidance behaviour was analysed in detail with Sonar5-Pro post-processing software including variables like total length, distance to the trawl, tortuosity, mean speed of total track, mean speed of first avoidance track, mean speed of total avoidance track, angle between initial and first avoiding track and angle between initial and total avoiding track. 76% of the fish were swimming into the trawl, 24 % out of the trawl. The majority of the fish (81.7%) showed no avoidance reac...
This dataset evaluates microbial responses to pharmaceuticals in agricultural soils which may imp... more This dataset evaluates microbial responses to pharmaceuticals in agricultural soils which may improve essentially our understanding of micropollutants fate and their potential implications to the environmental and human health. In this study, we focused on immediate (1 d), short- (13 d) and long-term effects (61 d) of pharmaceuticals amendment on microbial changes in seven soils differing in physical chemical properties. The data include dictionaries of used soils, treatments, parent compounds and their metabolites, and measured fatty acids. Degradation of the individual pharmaceuticals as well as their mixture are shown in folder "analytics", and raw observation data for basal respiration and phospholipid fatty acids are given in respiration.csv and PLFA.csv. The code to run these data will be publicly open on GitHub upon publishing the scientific article of the same name.
To understand the conditions of coexistence in multiple-species predator community, we studied lo... more To understand the conditions of coexistence in multiple-species predator community, we studied longitudinal and vertical movement of pike (Esox lucius), pikeperch (Sander lucioperca) and catfish (Silurus glanis) in the Římov Reservoir, using an autonomous telemetry system for 11 months. We found significant differences among these three species in movement and depth that varied considerably in time, with the greatest differences between warm (late spring and early autumn) and cold season (late autumn to early spring). Preference for different sections of the reservoir was stable for pike, while pikeperch and catfish frequently visited tributary during the warm season, and moved closer to the dam during the cold season. Pike longitudinal activity was highest in the cold season, pikeperch in the warm season, and catfish activity peaked in both the warm and cold seasons. Overlap in the depth used among species was higher in the warm season, when all species used the upper layer of the ...
Fish communities differ significantly between the littoral and the pelagic habitats. This paper a... more Fish communities differ significantly between the littoral and the pelagic habitats. This paper attempts to define the shift in communities between the two habitats based on the European standard gillnet catch. We sampled the benthic and pelagic habitats from shore to shore in Lake Most and Římov Reservoir (Czech Republic). The 3 m deep pelagic nets were spanned across the water body at equal distances from two boundary points, where the depth was 3.5 m. The benthic community contained more fish, more species, and smaller individuals. The mild sloped littoral with a soft bottom attracted more fish than the sloping bank with a hard bottom and less benthos and large Daphnia. The catch of the pelagic nets was dominated by eurytopic fish—rudd (Scardinius erythrophthalmus) and roach (Rutilus rutilus) in Most and bleak (Alburnus alburnus) in Římov. With the exception of one case where overgrown macrophytes extended the structured habitat, the largest shift from the benthic to the pelagic ...
Movement ecology is increasingly relying on experimental approaches and hypothesis testing to rev... more Movement ecology is increasingly relying on experimental approaches and hypothesis testing to reveal how, when, where, why, and which animals move. Movement of megafauna is inherently interesting but many of the fundamental questions of movement ecology can be efficiently tested in study systems with high degrees of control. Lakes can be seen as microcosms for studying ecological processes and the use of high-resolution positioning systems to triangulate exact coordinates of fish, along with sensors that relay information about depth, temperature, acceleration, predation, and more, can be used to answer some of movement ecology’s most pressing questions. We describe how key questions in animal movement have been approached and how experiments can be designed to gather information about movement processes to answer questions about the physiological, genetic, and environmental drivers of movement using lakes. We submit that whole lake telemetry studies have a key role to play not only...
Repeat spawners constitute an important component of Atlantic salmon populations, but survival of... more Repeat spawners constitute an important component of Atlantic salmon populations, but survival of post-spawning individuals (kelts) are often compromised by anthropogenic structures such as hydropower plants (HPPs). Potential effects of HPPs include migration delays and associated increased energy depletion, which potentially results in increased overall mortality. We combined a detailed 3D hydraulic model with high-resolution 3D tracking of tagged kelts (length 73–104 cm) to obtain estimates of kelt movement through water. These estimates were then used in an energetics model to estimate hourly energy expenditure while negotiating the HPP area. Hourly kelt energy expenditure varied between 0.8 and 10.1 kJ × h−1 and was dependent on kelt length. Degree of additional energy depletion can amount to several percent of remaining energy content (our study indicates 4–5 percentage points) potentially leading to reduced post-spawning survival. In turn, this can nullify the iteroparous bree...
Bothriocephalidean cestodes reported from lizardfish (Saurida Valenciennes in Cuvier & Valencienn... more Bothriocephalidean cestodes reported from lizardfish (Saurida Valenciennes in Cuvier & Valenciennes) were revised on the basis of newly collected material from type-hosts and available typeand voucher specimens. Instead of nine taxa of four genera listed in the literature, only Oncodiscus sauridae Yamaguti, 1934 and Penetrocephalus ganapattii (Rao, 1954) are considered valid and thus both genera become monotypic. Both taxa are redescribed, including the first scanning electron micrographs and data on intraspecific variability. Both species are unique among bothriocephalid cestodes in the lateral position of the vagina in relation to the cirrus-sac. Oncodiscus sauridae found in Saurida longimanus Norman, S. nebulosa Valenciennes (new host record), S. tumbil (Bloch) and S. undosquamis (Richardson) differs from P. ganapattii found in S. micropectoralis Shindo & Yamanda and S. tumbil in the following characters: (i) scolex shape (fan-shaped, with crenulated bothrial margins in O. saurid...
The higher proportion of males of the invasive round goby Neogobius melanostomus in samples from ... more The higher proportion of males of the invasive round goby Neogobius melanostomus in samples from two activity selective passive fishing gears compared with one activity non-selective fishing gear in three Dutch lakes is related to higher male locomotory activity and is a sex-dependent trait. This difference in activity reflects the different ecology of male and female N. melanostomus.
Piscivory in cyprinids (Cyprinidae) is extremely rare. Specifically, common bream (Abramis brama)... more Piscivory in cyprinids (Cyprinidae) is extremely rare. Specifically, common bream (Abramis brama) and common carp (Cyprinus carpio) are zooplanktivorous fish in deep lentic waters. Nevertheless, we observed predation by these two cyprinids under natural conditions in the Vír Reservoir, Czech Republic. We conducted diet analysis for cyprinids caught by trawling and gillnets and the large amount of young-of-the-year (YOY) perch (Perca fluviatilis), with sizes of 37-52 mm standard length, were found in their digestive tracts. In 2010, a large amount of YOY perch caused a significant decrease in Daphnia spp. size and abundance in the reservoir. Hence, a food deficit was induced for the cyprinids, apparent also from the poor nutritional condition of common bream which was much worse than the condition of those in similar reservoirs. Common carp and common bream shifted to forced piscivory, and they utilized the YOY perch as an alternative food source. In contrast, smaller species, such a...
Direct observation of fish avoidance behaviour with respect to an active pelagic trawl is challen... more Direct observation of fish avoidance behaviour with respect to an active pelagic trawl is challenging. A DIDSON acoustic camera was used for direct observation of the fish avoidance behaviour in front of the mouth of an active pelagic surface trawl in the mesotrophic Czech reservoir Zelivka. Based on their reaction and swimming behaviour towards the active trawl the fish (n = 1051) displayed very heterogeneous behavioural patterns, which were classified in 11 different categories of avoidance behaviour. The avoidance behaviour was analysed in detail with Sonar5-Pro post-processing software including variables like total length, distance to the trawl, tortuosity, mean speed of total track, mean speed of first avoidance track, mean speed of total avoidance track, angle between initial and first avoiding track and angle between initial and total avoiding track. 76% of the fish were swimming into the trawl, 24 % out of the trawl. The majority of the fish (81.7%) showed no avoidance reac...
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