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System do hodowli owadów, inkubacji jaj owadów i odchowu larw owadów, sposób go wykorzystujący i jego zastosowanie
The first case report of the Florida cooter (Pseudemys floridana) in Poland, along with an market analysis and comments on the online pet trade as a source of potential biological invasions
The threat posed by invasive alien turtle species to aquatic ecosystems in Poland increases annually. The spectrum of species recorded in the wild evolves and follows trends observed in the pet market. After the ban on the trade of slider turtles (Trachemys scripta), Pseudemys spp. dominated the market of pet turtles in Poland. Currently, released specimens are more and more frequently recorded in the wild, and the scale of their invasion may be similar or even higher than what is currently recorded for T. scripta. In 2025, the first report of a released Pseudemys floridana was recorded in Poznań, which is probably the first record of this species in Poland. The analysis of online offers of freshwater turtles present on the market shows that Pseudemys spp. represents almost 50% of all offers. Thus, a risk assessment for potential invasion should be evaluated, and probably the list of invasive species of concern for Poland should be reviewed, including Pseudemys spp.. However, no action against keeping it in private hands should be taken. The main preventive action should be a ban on the import of Pseudemys spp. to Poland.
The First Insight Into Full-Fat Superworm (Zophobas morio) Meal in Guppy (Poecilia reticulata) Diets: A Study on Multiple-Choice Feeding Preferences and Growth Performance
Abstract Insect meals are sustainable alternative protein sources in animal nutrition. However, the data on their application in petfood and ornamental fish nutrition are scarce. Thus the present study was undertaken to assess their usability in guppy (Poecilia reticulata) diets. The first experiment aimed to investigate the attractiveness of select insect meals for guppies, and the second evaluated superworm (Zophobas morio) meal monodiet effects. The first experiment (free-choice feeding test) lasted five days. Fish were given a choice between four attractants: fish meal, black soldier fly (Hermetia illuces) meal (HI), Madagascar cockroach (Gromphadorhina portentosa) meal (MC), and superworm (Zophobas morio) meal (ZM). The preliminary part of the study showed that the most frequently chosen attractant throughout the entire free-choice feeding test period was ZM. Based on the obtained results, the second part of the study was designed as a growth test with the use of a ZM monodiet compared to commercial feed. The experiment lasted 90 days, and 150 guppy fry were used. The fish were randomly divided into two groups (CON – commercial feed, ZM – Zophobas morio meal). No effects of dietary treatment were found in terms of survival rate, fish body length, or fish body length gain. The present study shows that ZM was the most preferred attractant and that a monodiet based on insect meal can be successfully applied in guppy fry nutrition.
Innowacyjna technologia wychowu młodocianych stadiów ryb jesiotrowatych o wysokim stopniu adaptacji do warunków naturalnych i seminaturalnych
Effect of chitosan on common carp (Cyprinus carpio) fry growth performance, feed utilization and nutriphysiological status
Morphomigrational description as a new approach connecting cell's migration with its morphology
AbstractThe examination of morphology and migration of cells plays substantial role in understanding the cellular behaviour, being described by plethora of quantitative parameters and models. These descriptions, however, treat cell migration and morphology as independent properties of temporal cell state, while not taking into account their strong interdependence in adherent cells. Here we present the new and simple mathematical parameter called signed morphomigrational angle (sMM angle) that links cell geometry with translocation of cell centroid, considering them as one morphomigrational behaviour. The sMM angle combined with pre-existing quantitative parameters enabled us to build a new tool called morphomigrational description, used to assign the numerical values to several cellular behaviours. Thus, the cellular activities that until now were characterized using verbal description or by complex mathematical models, are described here by a set of numbers. Our tool can be further used in automatic analysis of cell populations as well as in studies focused on cellular response to environmental directional signals.
Dietary Fish Meal Replacement with Hermetia illucens and Tenebrio molitor Larval Meals Improves the Growth Performance and Nutriphysiological Status of Ide (Leuciscus idus) Juveniles
The ide (Leuciscus idus) is a native European species of rheophilic cyprinid fish whose wild population status is dependent on conservation efforts, particularly regular restocking. This study aimed to evaluate the effects of including insect meals as a component in the diet of ide juveniles on their growth performance, feed utilization, and nutriphysiological status. Four diets were formulated: three with insect meals, HI–with 20% Hermetia illucens meal, TM–with 20% Tenebrio molitor meal, and ZM–with 20% Zophobas morio meal, and the control group diet, CON–fish meal with no insect component. The effects of the various diets on the efficiency of rearing ide juveniles were assessed based on fish growth parameters, feed utilization parameters, somatic indices, and intestinal and hepatopancreatic histomorphology. The highest increase in fish weight gain and the protein efficiency ratio was observed in the HI and TM groups, while the lowest values were observed in the CON and ZM groups. Comparable results were noted for the feed conversion ratio, which was most favorable in the HI and TM groups and increased in the ZM group. The use of black soldier fly and mealworm larval meal in the diets of ide juveniles had a positive effect on rearing results and overall fish health.
The effects of a Bacillus licheniformis and phytase mixture added to broiler diets on growth performance, nutrient digestibility, and cecal microecosystem
Abstract This study aims to evaluate the effects of Bacillus licheniformis and 6-phytase added alone or in combination to broiler chicken diets on the growth performance, apparent ileal digestibility coefficient (AID) of nutrients, microbial activity, and cecal bacterial communities. In total, 400 one-day-old female Ross 308 chicks were randomly allocated to 4 dietary treatments (10 replicate pens, 10 birds each). The following groups were defined: NC (negative control), basal diet without any feed additive supplementation; NC+Pro, basal diet with addition of the B. licheniformis preparation (500 g/t of diet); NC+Phy, basal diet with addition of phytase (200 g/t of diet); and NC+Pro+Phy, basal diet combined with both studied additives. B. licheniformis positively affected (P<0.05) the feed intake (FI) and feed conversion ratio (FCR) in the first 10 d of bird rearing. Moreover, phytase supplementation elevated the FCR from 21 to 35 d. In the entire experiment, an interaction between phytase and probiotic was observed only in terms of decreasing the bird FI (P=0.005) without a negative effect on the FCR (P>0.05). Furthermore, the AID of ether extract was improved by phytase supplementation. In terms of the cecal microecology, both separately administered factors promoted Lactobacillaceae in the ceca. Interactions between probiotic preparation and phytase were noted that indicated a decreased Clostridiales population and favored Ruminococcaceae proliferation. It can be concluded that for the first time in the available literature, the favorable interactions between B. licheniformis and phytase resulted in improved performance and cecal microbiota changes in broilers.
Zastosowanie szczepu bakterii Carnobacterium divergens oraz jego metabolitów do wytwarzania probiotyku dla ryb, mięczaków i skorupiaków słodkowodnych do ograniczenia aktywności, wzrostu lub przeżywalności chorobotwórczych bakterii Aeromonas hydrophila, Aeromonas salmonicida, Vibrio angillarum, Edwardsiella Tarda
The first insight into black soldier fly meal in brown trout nutrition as an environmentally sustainable fish meal replacement
Sposób bioutylizacji produktów ubocznych przemysłu rolno-spożywczego oraz zastosowania mieszanki paszowej do bioutylizacji produktów ubocznych przemysłu rolno-spożywczego poprzez hodowlę/chów owadów z rzędu Coleoptera i/lub Blattodea
The First Report of The Growth Performance and Environmental Sustainability Effects of Dietary Insect Meal Application on The Jardine River Turtle (Emydura Subglobosa)
Abstract This study provides empirical data on the balancing, production, and quality of freshwater turtle diets containing partially defatted black soldier fly larvae Hermetia illucens meal (BSFL) as a fish meal (FM) replacement. A 70-day experiment was performed using 27 Jardine river turtle (Emydura subglobosa) juveniles (6 months old). Three dietary treatments were applied, namely, CON with 30% fish meal and no BSFL as the control, H75 with 22.5% fish meal and 7.5% BSFL, and H150 with 15% fish meal and 15% BSFL, with 3 replicates per treatment, 3 animals per replicate, and 9 specimens in total per treatment. Post-extrusion tests showed that feed technological parameters are dependent on the BSFL meal proportion in terms of the pellet length expansion rate, volume increase, and water binding capacity. The obtained experimental feeds were well accepted by the animals. During the entire experimental period, no turtle mortality, diet-related issues, or differences in shell development or growth performance were recorded among the treatments. However, the feed intake increased in comparison to CON when 7.5% BSFL meal was used (42.30 g vs. 50.40 g), and a lower feed conversion ratio was observed in the 15% BSFL treatment (1.51 vs. 1.38). For the first time, it was empirically proven that E. subglobosa can efficiently utilize BSFL meal for up to 15% of their diet. Moreover, the possibility of an increase in environmental sustainability during turtle husbandry due to a decrease in total marine resource use of 55.8% and a 57.4% decrease in the use of fish meal per kg of body weight gain were recorded.
Evaluation of the application and environmental sustainability of alternative feed materials in sturgeon nutrition. A review
Innowacyjne komponenty paszowe w żywieniu ryb reofilnych - optymalizacja oraz zwiększenie efektywności wychowu stadiów młodocianych
Innowacyjny system rozrodu i wychowu karpiowatych ryb reofilnych w biologicznie efektywnej i niskoemisyjnej akwakulturze zachowawczej
Linia technologiczna do odchowu lub hodowli owadów, modułowy system linii technologicznych, sposób odchowu lub hodowli owadów oraz zastosowanie linii technologicznej i systemu modułowego do odchowu lub hodowli owadów
The First Insights on Trans-Galactooligosaccharide Effects on Fatty Acids Profile and Microstructure of Muscle in Common Carp
Abstract The aim of the study was to determine the effects of prebiotic GOS on muscle histomorphometry and the total lipid, total cholesterol content and fatty acids profile in the meat of common carp. The 60-day-long experiment was performed on one-year-old fish. Three diets were used in the experiment: control diet 1 (C) with no microbiota affecting feed additives, diet 2 (B1) with 1% of GOS, and diet 3 (B2) with 2% of GOS. At the end of the trial, 16 individuals from each treatment group were used for the analyses. Fish meat from the B1 group had significantly higher lipid content compared to B2, but neither B1 nor B2 groups were different from the control group. The percentages of SFA, MUFA, PUFA, indexes n-3/n-6, PUFA /SFA, AI and TI, and total cholesterol content were not affected, in contrast to C14:0, C16:1 n-7, C18:0, C18:2 n-6, C20:4 n-6, and total n-6 FA. GOS significantly increased the percentage of normal fibres, while the lower amount of fibre atrophy and splitting was observed. The results confirm that diet supplemented with 2% GOS may be recommended as feed additive in carp nutrition due to positive effects on some fatty acids profiles and muscle microstructure.
How potentially sustainable solutions may be unsustainable in practice: carrot pomaces in common carp nutrition
Abstract The aim of this study was to evaluate the effects of carrot pomaces dried at two temperatures as a feed component on growth performance, environmental sustainability, and meat quality in common carp (Cyprinus carpio). Three diets were developed: a control without pomace (CON); CPL with 15.5% carrot pomace dried at 40°C and CPH with 23.6% carrot pomace dried at 120°C. A total of 240 two-year-old common carp (average body weight of individual: 1025 g) were randomly distributed into 12 tanks, four per treatment, including 20 fish per tank. The experiment was performed using an outdoor open flow aquaculture system. The growth trial lasted 60 days, after which fish samples were taken for analysis of meat quality parameters. There were no significant differences between groups in terms of the final body weight, protein efficiency ratio, or survival rate. However, in terms of weight gain, specific growth rate, and feed conversion ratio, fish fed the CPH diet exhibited significant worsening. Moreover, the fillets of fish from the CPH group exhibited a darker coloration compared to the CON diet. It is concluded that high temperature drying of carrot pomace added to carp diet negatively affected fish quality. It should be also emphasized that inclusion of the both carrot pomaces tested in this study significantly increased the usage of fish meal per kilogram of fish body weight gain. These results showed a reduced efficacy of using carrot pomace in practical and sustainable common carp nutrition.
Establishing a Freshwater Turtle (Emydura subglobosa) Laboratory Line (FTLL) as a novel model species for research and education
<b>The Jardine River turtle (Emydura subglobosa) was selected as a potential model species for studies on freshwater turtles and general reptile physiology. Attempts to establish a freshwater turtle laboratory line were made when an adult pair of E. subglobosa was received in 2016 by the Laboratory of Inland Fisheries and Aquaculture (Poznań University of Life Sciences). The first generation of offspring was obtained in 2017, and the second generation in 2023. In each generation, unrelated specimens were added to the animal cohort to avoid inbreeding. Husbandry regimes were established, and a basal diet for nutritional experiments was developed and manufactured by two methods, producing extruded feed and a gelatine-solidified variant. The establishment of the Freshwater Turtle Laboratory Line (FTLL) provides an opportunity to improve the development of husbandry techniques, increase knowledge of reptile physiology, and use laboratory-raised animals as model species for research and education.
