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118
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February 2020 - June 2020
August 2018 - December 2020
January 2014 - September 2017
Publications
Publications (118)
The present study aimed to test the effects of different dietary inclusion levels of fishmeal (F) and blends of poultry processed protein meals (P), i.e. poultry by-product meal, hydrolysed feather meal, dry-blood meal in African catfish (Clarias gariepinus). Fish were fed during 84 days with four practical diets, i.e. diet HF-LP (F: 90 g kg − 1 ;...
The diversification of modern aquaculture systems with high-value finfish species, includingPercidae, is hampered by various diseases or even epidemics caused by a wide range ofviruses, bacteria, fungi and parasites. The present meta-analysis revealed six viral, four fungal,and 30 bacterial families as the dominant threats to percid aquaculture, in...
Long-chain polyunsaturated fatty acids (LC-PUFA) like arachidonic acid (ARA, 20:4n-6), eicosapentaenoic acid (EPA, 20:5n-3), and docosahexaenoic acid (DHA, 22:6n-3) constitute one-third to half of fish sperm lipids. Fish sperm is rich in phospholipid (PL)—primarily phosphatidylcholine, phosphatidylethanolamine, and sphingomyelin. DHA is generally t...
Swim bladder inflation (SBI) is a fundamental step in larval development for both physostome and physoclist fish species. Failure of the SBI triggers higher energy expenditures of the individual, which negatively affects swimming ability, growth rate, feeding efficiency, susceptibility to predation, and survival rate. In aquaculture, the SBI failur...
The present study investigated environmental impacts associated with greenhouse gas (GHG) emission, economic Fish in Fish out ratio (eFIFO), waste outputs, and food-feed competition of feeding diets containing the filamentous fungus Paecilomyces variotii (PEKILO®) to Atlantic salmon (Salmo salar) pre-smolts. To achieve this, a feeding trial was con...
Inspired from discussions around human dietetics and behavioral traits, the study presumed that bold fish may have better long chain polyunsaturated fatty acids (LC-PUFA) accumulation strengths than shy fish, when subjected to a common food. Using Eurasian perch (Perca fluviatilis) model similar in age and sexually immature, it was investigated whe...
With the general aim of increasing the efficiency and profitability of market-ready diets tailored for recirculating aquaculture system (RAS), this study evaluated diet digestibility and growth performance of African catfish (Clarias gariepinus) fed four practical diets (CP: 44% DM; EE: 12% DM; GE: 19 MJ kg−1) containing different rates of fishmeal...
This study aimed to conduct a systematic review and meta-analysis evaluating the inclusion of β-glucan in aquaculture animal diet and its impact on their health outcomes. Relevant studies were identified from Scopus and Web of Science databases. A total of 82 primary studies published between 1996 and 2024 were reviewed, of which 70 were included i...
Development of peatland-based, recirculating freshwater aquaculture that is efficient and economically viable presents considerable benefits for society including supporting communities transitioning to low-carbon economies. This case study constitutes the first peatland-based process that uses fish cultivation waste to produce duckweed and microal...
Protozoan parasites cause a wide range of devastating diseases in various kinds of organisms, including humans. It may be lethal if untreated promptly. To detect specific disease-causingorganisms parasites, a wide range of immunological and molecular technologies are now widely available. However, all of this depends on the worker's expertise and a...
This is the first study determining the effects of bath exposure to fulvic acid, a humic substance, on the skin mucosal immunity of rainbow trout (Oncorhynchus mykiss). Humic substances have recently been gaining attention for their increasing concentrations in aquatic ecosystems and their use as supplements in sustainable aquaculture. This study d...
This study aimed to investigate the effects of dietary protein (380 vs 510 g/kg) and duration of early mild stress (0, 2 and 4 weeks) on growth, haematology, serum biochemistry, immunological response, antioxidant system, liver enzymes, and stress responsiveness of oscar (Astronotus ocellatus; 4.7 ± 0.6 g). After the nine-week feeding trial, all fi...
The study investigated various metrics involved in the substitution of fishmeal with a novel protein source derived from lesser mealworm (Alphitobius diaperinus) larva meal (LMW) in the diets of aquaculture-emerging fish - European perch (Perca fluviatilis). Four isoprotein (50%), isolipid (14%), and isoenergy (21 MJ/kg) diets were formulated, in w...
Structural (fatty acids) and energetic (ATP-related compounds) processes of spermatozoa of Eurasian perch (Perca fluviatilis) has been studied. Present study identified changes in fatty acids and adenosine phosphate stoichiometries as sperm ascended from basal metabolism (pre-activation quiescent state) to active metabolism (post-activation exhaust...
Defatted black soldier fly (Hermetia illucens) (DHI) and poultry by-product meal (PBM) were used in tandem to substitute fishmeal in diets for European perch (Perca fluviatilis) in the current study. Four isoproteic (52%), isolipidic (14%), and isoenergetic (22 Mj/kg) diets (abbreviated diets: COM0, COM50, COM75, and COM100) were formulated, in whi...
The study analysed the effect on global warming potential (Life Cycle Assessment) of the partial replacement of fishmeal (from by-products) by alternative protein meals in diets for rainbow trout. A total of 1020 trout (17±7.5 g) were fed four diets (three tanks per diet) with fishmeal being partially substituted by alternative protein meals: a con...
The aquaculture industry is expanding to meet the daily requirements of humanity from high-quality seafood. In this regard, intensive aquaculture systems are suggested, resulting in high production but being challenged with immunosuppression and disease invaders. Antibiotics were used for a long time to protect and treat aquatic animals; however, c...
The widespread use of silica nanoparticles (SiO2-NPs) in various industries, including chemical polishing, cosmetics, varnishes, medical, and food products, has increased the risk of their release into aquatic ecosystems. The toxic effects of small-size SiO2-NPs on the reproductive performance of zebrafish (Danio rerio) have yet to be widely studie...
Trace minerals are essential for the normal functioning of all living organisms. In addition, the positive effects of several medicinal plants have been demonstrated in aquaculture. In the present study, we aimed to investigate the effects of a mixture of medicinal plants and test the synergistic effects of medicinal plants and chelated minerals on...
Avian vectors, such as ducks, swans and geese, are important dispersers of plant propagules. Until recently, it was thought that small vegetative propagules were reliant on adherence to vectors and are unlikely to survive passage through the avian digestive tract. Here, we conclusively demonstrate that metabolically active angiosperms can survive p...
Aquaculture will become an important food production sector for humans in the coming decades. However, disease outbreaks can be considered a significant obstacle to continually developing aquaculture. Plant powders and extracts are natural feed additives that, due to their bioactive compounds, including phenolic compounds, proteins, vitamins, and m...
To evaluate strategies for optimizing waste in recirculating aquaculture systems, 1020 rainbow trout (initial live weight 17.2 ± 7.50 g/fish) were distributed into 12 tanks after 21 d of acclimation and fed during 84 days with four practical diets (crude protein: 49% DM; crude fat 26% DM; gross energy: 23 MJ kg⁻¹) containing different rates of fish...
The present study evaluated nutritional composition, stable isotopic signature, apparent digestibility coefficient (ADCs), and relative contribution of seven insect meals, namely black soldier fly (Hermetia illucens) (BSF), common housefly (Musca domestica) (CHF), yellow mealworm (Tenebrio molitor) (YMW), lesser mealworm (Alphitobius diaperinus) (L...
Duckweed (Lemnaceae) can support the development of freshwater aquaculture if used as extractive species in Integrated MultiTrophic Aquaculture (IMTA) systems. These aquatic plants have the advantage of producing protein-rich biomass that has several potential uses. On the contrary, other biological compartments, such as microalgae and bacteria, pr...
The use of insect meal in aquafeed formulations has recently gained attention. Detailed knowledge about the inclusion levels for pikeperch (Sander lucioperca), a promising candidate for intensive aquaculture in Europe remains, however, fragmented. In the present study, 4 isoproteic (45% dry matter) and isoenergetic (21 MJ/kg) diets were formulated,...
The authors report on the design and operation of an advanced, innovative and environmentally friendly freshwater integrated multitrophic aquaculture (IMTA) system. The novel system facilitates fish production while controlling water quality using duckweed treatment units. The basic design consists of ponds for farming of Eurasian perch and rainbow...
With the general aims of controlling waste production and increasing efficiency in recirculating aquaculture system (RAS), this study compared growth performance, diet digestibility, and faeces characteristics in rainbow trout (Oncorhynchus mykiss) fed four diets including fish meal (FM) as the main protein source or partially replacing FM with thr...
The present work employed a systematic review and meta‐analysis to quantify the overall effects of various types of insect meal on special growth rate (SGR), feed conversion ratio (FCR) and protein efficiency ratio (PER) of aquatic animals. A total of 107 studies published from 1990 to 2021, targeting 23 freshwater and 17 marine fish species, emplo...
The aquaculture industry is considered a key sector for the supply of high quality, nutritious food. However, growth of the aquaculture sector has been slow, particularly in Europe, and this is amongst others linked to concerns about environmental impacts of this industry. Integrated Multitrophic Aquaculture (IMTA) has been identified as an importa...
Yellow mealworm (Tenebrio molitor) larvae meal (TM), one of the seven insect species approved for use in aquafeed in Europe, is a frequently investigated candidate for fish diets. This study aimed to investigate the effects of dietary defatted TM on production performance, serum biochemistry, nutrient digestibility, fillet traits, intestinal microb...
Artificial reproduction of northern pike Esox lucius is impeded by the likelihood of obtaining only a small volume of sperm of inconsistent quality. A controlled-release hormone delivery system has the potential to enhance sperm production while avoiding multiple injections The objective of this study was to investigate the effects of mammalian gon...
Many endangered fish species in the wild are artificially bred, and their populations are strengthened by the stocking of aquaculture-raised juveniles. Because fish from aquaculture are generally not well prepared for the challenging life in the wild, we tested whether training for selected challenges could improve fish survival after stocking. We...
Stable isotope analysis was conducted to investigate stable isotope ratios of carbon (δ¹³C) and nitrogen (δ¹⁵N), diet-tissue discrimination factors of carbon (Δ¹³C) and nitrogen (Δ¹⁵Ν). Bayesian mixing models were performed to assess relative contribution of insect meal and other ingredients to the development of tissues of European perch (Perca fl...
Restocking programmes of different fish species have been implemented worldwide. However, the survival of hatchery-reared fish after release to riverine ecosystems is at a very low level. One of the reasons for the high mortality rate of post-released fish is their modified swimming behaviour due to the hatchery rearing practice. To investigate one...
The study was executed to find out the potential effects spent coffee ground (SCG) on Nile tilapia’s skin mucosal and serum immunities, disease prevention, and growth rate reared in a biofloc system. Nile tilapia fingerlings (average weight 15.25 ± 0.07 g) were disseminated into 15 aquaria (150 liters tank-1) at a density of 20 fish per aquarium an...
Aquaculture is an important source of animal protein and a key contributor to global food security. However, aquaculture can exert a negative effect on the aquatic environment due to the release of effluents containing high nutrient levels. In integrated multi-trophic aquaculture (IMTA), the waste produced by one species is the input for another, r...
This study investigated the effects of photoperiod duration on growth, hematological and blood biochemical parameters, and antioxidant capacity of largemouth bass (Micropterus salmoides). Triplicate groups of juvenile fish (33.22 ± 4.68 g) were kept in a recirculating aquaculture system and exposed to five different photoperiods [light/dark (L/D),...
The supplementation of fish diets with phytogenics can increase growth performance and can modulate immune system response. European perch Perca fluviatilis (initial weight 25.0 ± 0.4 g) were fed a diet including 0 (Control), 10 (G10), 20 (G20), and 30 (G30) g kg−1 garlic powder. No significant difference in the growth parameters and somatic indice...
Fish disease resistance is one of the most desirable traits for aquaculture production. It is known that up to 90% of immune response relies on the innate immunity. Fish innate immunity could be potentially heritable since it is determined by fish local adaptation based on genetic differentiation or population-specific environment. Therefore, using...
In the present study, a possible nature immunostimulant and growth promoter—humic substances (HS) originating from Siberian leonardite mineraloid—were tested on juvenile Clarias gariepinus performance. Feed additive was applied onto commercial pelleted feed at four HS levels—0, 1, 3, and 6% w/w (HS0, HS1, HS3, HS6, respectively). Diets were tested...
Effects of feeding dietary defatted black soldier fly (Hermetia illucens) larvae meal (HI) on intestine microbiota, and on histomorphology, oxidative enzyme activities in liver and intestine of pikeperch (Sander lucioperca) were investigated. Four isoproteic (45% crude protein) and isolipidic (18% ether extract) diets were formulated to include 0%...
The aim of the study was to determine the efficacy of poly (lactic-co-glycolic acid) microparticles as a carrier of gonadotropin-releasing hormone analogues (GnRHa) for induction of ovulation in peled Coregonus peled. Female peled were injected intraperitoneally with 1) saline solution only (control), 2) mammalian GnRHa at 25 µg/kg body weight, 3)...
Background: Yellow mealworm (Tenebrio molitor) larvae meal (TM), one of seven approved insect species used in aquafeeds, is a frequently investigated candidate for fish diets.
Results: This study aimed to investigate the effects of dietary defatted TM on production performance, serum biochemistry, nutrient digestibility, fillet traits, intestinal m...
Inadequate oxygen saturation can induce stress responses in fish and further affect their immunity. Pikeperch, recently introduced in intensive aquaculture, is suggested to be reared at nearly 100% DO (dissolved oxygen), yet this recommendation can be compromised by several factors including the water temperature, stocking densities or low circulat...
Diet supplemented with nettle Urtica dioica and tarragon Artemisia dracunculus leaf powder on fingerling rainbow trout Oncorhynchus mykiss was assessed. Fish of initial body weight 7.41 ± 0.16 g, were distributed in six groups, three replications, and were fed 8 weeks. 0 (control), 10 nettle (N1), 30 nettle (N3), 10 tarragon (T1), 30 tarragon (T3)...
We retrieved data from various studies to investigate the consequences of insect meal production and insect meal-based diets with respect to their environmental impact, including global warming potential, energy use, land use, water use, acidification, eutrophication as well as to economic fish-in fish-out ratio and solid waste output production. A...
We assessed swimming capacity, energy expenditure, and physiological responses of European perch (Perca fluviatilis) fed four isonitrogenous and isoenergetic diets containing yellow mealworm (Tenebrio molitor) larvae meal at 0, 25, 50, and 75% substitution for fishmeal (abbreviated diets, TM0, TM25, TM50, and TM75). Each diet was fed to quadruplica...
The current knowledge on how different Eurasian perch rearing systems impact the final fillet quality is scant. Therefore, two domestic storage conditions were investigated—10 months frozen (-20 °C) and 12 days refrigerated (+4 °C) storage conditions—in order to determine (i) how the choice of rearing system affects fillets quality during different...
The maraena whitefish, Coregonus maraena (Bloch, 1779), is often considered a suitable candidate for intensive aquaculture diversification in the EU. However, only a few such farms in Europe are in operation. Rearing this species in recirculating aquaculture systems is a recent innovation, and optimisation is necessary to standardise aspects of lar...
Domestication and selective breeding can mitigate current bottlenecks in European perch aquaculture. Monitoring the condition and stress tolerance of European perch stocks from different recirculating aquaculture systems is of general interest to set the baseline values of promising candidates for further breeding processes. We recorded morphometri...
Optimizing larval rearing protocols is critical to successful intensive fish culture. We compared the efficacy of feeding strategies for larvae of maraena whitefish Coregonus maraena, a promising candidate for intensive aquaculture. Survival, growth indicators, intestine development, and liver status were compared in larvae fed live feed, commercia...
The aim of the present study was to assess the effects of a prolonged photoperiod on growth rate and sexual maturation in brook trout Salvelinus fontinalis. The task of the experiment was to determine the most effective light regimen capable to minimizing the effects of puberty, including impairment of somatic growth and further general characteris...
Qualitative and quantitative differences in benthic macrozoobenthos distribution in carp pond littoral zones (macrophyte areas; LM) and pelagic zones (macrophyte-free areas; MF) were assessed in four commercial carp ( Cyprinus carpio ) grow-out ponds in the Czech Republic (semi-intensive management) and Austria (organic management) monthly over the...
European perch, Perca fluviatilis, is a highly promising candidate for freshwater aquaculture diversification. It has great potential to deliver products of sensory quality and nutritional value according to the market demands in the EU. However, the production is often hampered by bacterial diseases causing low growth and mass mortality in intensi...
Insect meal is gaining increased attention in aquafeed formulations due to high protein content and an essential amino acid profile similar to that of fishmeal. To investigate insect meal in feed for European perch Perca fluviatilis, a promising candidate for European intensive culture, we replaced standard fishmeal with partially defatted black so...
Fish feed delivery is one of the challenges which fish farmers encounter daily. The main aim of the feeding process is to ensure that every fish is provided with sufficient feed to maintain desired growth rates. The properties of fish feed pellet, such as water stability, degree of swelling or floating time, are critical traits impacting feed deliv...
An eight-week experiment was performed to assess the effectiveness of watermelon rind powder (WMRP) on growth efficiency, immunity, and disease resistance of Nile tilapia, O. niloticus. Three hundred fish (17.14 ± 0.12 g) were fed five diets; 0 (Diet 1- control), 20 g kg-1 WMRP (Diet 2), 40 g kg-1 WMRP (Diet 3), 80 g kg-1 WMRP (Diet 4), and 160 g k...
Effect of oxygen saturation and thermal regimes on growth and selected physiological indicators of juvenile Salvelinus fontinalis × Salvelinus alpinus hybrids were investigated in separate experiments. Hybrid status of tested fish, with S. fontinalis as the maternal species, was confirmed by sequence analysis. During both experiments fish doubled t...
There has been an increasing interest in enhancing freshwater aquaculture processes without hindering the progress of the Water Framework Directive. This constitutes the first study to describe a new concept in integrated multitrophic aquaculture (IMTA) that uses cutaway peatlands (bogs) to farm rainbow trout and Eurasian perch with associated orga...
We evaluated the relationship of stocking density to survival, growth performance and fin condition of European perch Perca fluviatilis with hand feeding and self‐feeders. Hand‐fed perch (body weight 19.1 ± 5.1 g and total length 107 ± 9 mm) were reared at 0.5, 1.0, 1.5 and 2.0 fish/L. Self‐feeding perch (body weight 25.4 ± 3.9 g and total length 1...
European perch is being described as a candidate species for European aquaculture diversification due to high market demand especially in Alpine countries. In past decades, the species has been well adapted in recirculating aquaculture system (RAS) allowing year-round intensive production (Policar et al., 2015). However, bacterial diseases by Aerom...
Proximate composition and amino and fatty acid profiles of peled fillets of both sexes reared in a pond-based system (PS) and intensively cultured in a recirculating aquaculture system (RS) were compared. Significantly higher values of dry matter, fat, and caloric value were found in RS fish, irrespective of sex. Fish from the PS group showed a hig...
Larval rearing is a crucial step in fish production. However, issues in larval production, such as low growth/survival rate, impede the aquaculture development of many species including Perca fluviatilis. Since allopatric populations of P. fluviatilis exhibit different growth rates for first-life stages, basing fish stocks on populations displaying...
High mortality (88.9–91.4%) of pond-cultured pikeperch Sander lucioperca broodstock was found 10 days post-spawning primarily due to body injury (15.2–18.2% of body area) and secondary fungal infection (27.6–34.8% of body area). Ninety days post-spawning mortality was 97.1–98.1%. Surviving broodstock showed satisfactory condition with no observable...
Non-indigenous western tubenose goby Proterorhinus semilunaris and round goby Neogobius melanostomus have rapidly increased in numbers and displaced native ichthyofauna in invaded ecosystems. This displacement has been predominantly linked to competition for resources and shelters. Similarly, P. semilunaris was displaced in many localities after in...
The influence of timing of extended photoperiods on growth and maturity of brook trout was investigated in a 112‐day experiment. The fish with mean initial weight of ~192 g were reared under four light regimes: one control group with natural ambient photoperiod and three groups exposed to an 18L:6D regime initiated at days 1, 23 or 46 of the growth...
