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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
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.
Aktualny stan wiedzy na temat żywienia ryb jesiotrowatych z uwzględnieniem alternatywnych materiałów paszowych
Black Soldier Fly Full-Fat Meal in Atlantic Salmon Nutrition – Part A: Effects on Growth Performance, Feed Utilization, Selected Nutriphysiological Traits and Production Sustainability in Fries
Abstract Black soldier fly larva meal (BSFM) application as an innovative feed material has been developed in aquaculture nutrition. However, recent scientific literature is still lacking in the case of insect meal effects on different stages of salmonid fish, and the vast majority of research is focused on farmed Atlantic salmon. Therefore, the holistic approach was undertaken in the cycle of two studies carried out: on fries and pre-smolts. This study aimed to evaluate the effect of fish meal (FM) replacement by full-fat BSFM in Atlantic salmon fry diets on the growth performance, feed utilization, crude protein and crude fat digestibility, somatic indices, histomorphology of intestines, and environmental sustainability. Additionally, pellet quality was assessed. Two experiments were performed on 360 Atlantic salmon fries – each of which lasted 60 days. For the first experiment, 240 individuals were distributed to four experimental groups: six replicates (tanks) per group and 10 fish per tank. For the second experiment, 120 individuals were distributed to four experimental groups: three replicates (tanks) per group and 10 fish per tank were used. The following groups were applied: CON – without the addition of full-fat BSFM and with 39% FM; BSFM5 – with 5% addition of full-fat BSFM and 36.1% FM; BSFM10 – with 10% full-fat BSFM and 33.3% FM; BSFM15 – with 15% addition of full-fat BSFM and 30.3% FM. The present study showed satisfactory results of BSFM inclusion at the levels of 5% and 10% as a replacement for fish meal in feeds for Atlantic salmon fries. No negative effects on growth performance, feed utilization, protein and fat digestibility, or intestinal structure were recorded. Simultaneously, insect meal inclusion in Atlantic salmon diets significantly improved the environmental sustainability of the feed. In the case of BSFM15, decreases in body weight gain, protein lipid efficiency ratio, and lipid efficiency ratio, as well as increases in feed conversion ratio, were observed. Therefore, the use of shares higher than 10% of BSFM in Atlantic salmon fries may not be recommended.
Określenie wpływu wielopoziomowej modyfikacji środowiska o charakterze abiotycznym i biotycznym na efektywność wychowu stadiów młodocianych jesiotrów
The first insight into black soldier fly meal in brown trout nutrition as an environmentally sustainable fish meal replacement
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.
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.
System do hodowli owadów, inkubacji jaj owadów i odchowu larw owadów, sposób go wykorzystujący i jego zastosowanie
Innowacyjne komponenty paszowe w żywieniu ryb reofilnych - optymalizacja oraz zwiększenie efektywności wychowu stadiów młodocianych
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.
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
Black Soldier Fly Full-Fat Meal in Atlantic Salmon Nutrition – Part B: Effects on Growth Performance, Feed Utilization, Selected Nutriphysiological Traits and Production Sustainability in Pre-Smolts
Abstract Black soldier larva meal (BSFM) seems to be a competitive protein and fat source for widely used fish meal (FM) and fish oil. Because of the still present problem of overfished seas and oceans for feed purposes, even a low substitution of the mentioned feed materials could have a positive impact on the environment. Due to the specificity of salmon metabolic processes, with particular attention to smoltification and the various requirements for nutrients related to individual stages, it is important to implement similar dietary inclusion levels of innovative feed materials in different life stages of Atlantic salmon. Thus, a holistic approach was undertaken in the cycle of two studies carried out: on fries and pre-smolts. This study aims to evaluate the effect of FM replacement by full-fat BSFM in Atlantic salmon pre-smolt diets on growth performance, feed utilization, somatic indices, histomorphology of intestines, colorimetric assessment and raw meat quality, as well as environmental sustainability. The following groups were applied: CON – without addition of full-fat BSFM and with 30% FM; BSFM5 – with 5% addition of full-fat BSFM and 27.1% FM; BSFM10 – with 10% full-fat BSFM and 24.3% FM; and BSFM15 – with 15% addition of full-fat BSFM and 21.3% FM. The present study showed satisfactory results of BSFM inclusion up to 15% as a replacement for FM in feeds for Atlantic salmon pre-smolts. The present study showed that BSFM is a suitable feed material for Atlantic salmon proper diet balancing and may be used to decrease FM content. The semi-technical application of BSFM containing diets confirmed their effectiveness during the growth phase of Atlantic salmon. According to our results, BSFM can be recommended as an alternative feed component in Atlantic salmon pre-smolt nutrition at levels up to 15%. Simultaneously, insect inclusion significantly improved the environmental sustainability of the rearing process.
A modular lamp system for insect breeding, use thereof for stimulation of insect reproduction and a method of insect breeding
Innowacyjny system rozrodu i wychowu karpiowatych ryb reofilnych w biologicznie efektywnej i niskoemisyjnej akwakulturze zachowawczej
Wpływ środowiskowych czynników abiotycznych i biotycznych na efekty podchowu i dobrostan jesiotra syberyjskiego (Acipenser baerii)
Biologicznie efektywna i niskoemisyjna akwakultura zachowawcza karpiowatych ryb reofilnych - utrzymanie tarlaków, rozród i wychów stadiów młodocianych
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.
