USD $48.60
Browse results
Hoe ziet natuurinclusieve landbouw eruit in de praktijk? Wat weten we over de effecten op bodem, water, biodiversiteit en klimaat? Hoe integreer je maatregelen voor een natuurinclusieve bedrijfsvoering? Deze vragen worden beantwoord in dit boek bomvol ervaringen van agrariërs en onderzoekers van CLM Onderzoek en Advies en Louis Bolk Instituut. In samenwerking met Hogeschool van Hall Larenstein en Aeres Warmonderhof is deze ervaring praktijkrijp gemaakt voor het leslokaal.
Dit boek is tot stand gekomen met subsidie van LNV. Het boek komt in maart 2024 digitaal gratis beschikbaar via Groenkennisnet.
Dit boek is tot stand gekomen met subsidie van LNV. Het boek komt in maart 2024 digitaal gratis beschikbaar via Groenkennisnet.
Hoe ziet natuurinclusieve landbouw eruit in de praktijk? Wat weten we over de effecten op bodem, water, biodiversiteit en klimaat? Hoe integreer je maatregelen voor een natuurinclusieve bedrijfsvoering? Deze vragen worden beantwoord in dit boek bomvol ervaringen van agrariërs en onderzoekers van CLM Onderzoek en Advies en Louis Bolk Instituut. In samenwerking met Hogeschool van Hall Larenstein en Aeres Warmonderhof is deze ervaring praktijkrijp gemaakt voor het leslokaal.
Dit boek is tot stand gekomen met subsidie van LNV. Het boek komt in maart 2024 digitaal gratis beschikbaar via Groenkennisnet.
Dit boek is tot stand gekomen met subsidie van LNV. Het boek komt in maart 2024 digitaal gratis beschikbaar via Groenkennisnet.
Editors:
, , , , and
Mosquitoes transmit many of the pathogens that cause zoonotic diseases from wildlife and livestock to people, with devasting consequences for public health. The factors affecting the ecology and evolution of the transmission dynamics of these mosquito-borne pathogens can be revealed using multidisciplinary research approaches. This 7th volume of the ECVD series focuses on the ecological factors that determine the transmission dynamics of mosquito-borne pathogens naturally circulating between animals of different taxa and their importance for human health. The authors revise the current knowledge on the pathogens that affect wildlife, including those maintained in captivity, as well as the use of cutting-edge techniques for the identification of potential vectors of these pathogens. In addition, this volume explores the role of factors related to global change, including changes in landscape use, deforestation and urbanization, as major drivers of the distribution of mosquito vectors and the dynamics of pathogen transmission. Finally, updated information on the approaches used to identify and control mosquito-borne diseases is presented, with a particular focus on those affecting humans. In summary, this book provides an updated review of the different mosquito-borne pathogens affecting animals and their public health relevance.
Editors:
, , , , and
Mosquitoes transmit many of the pathogens that cause zoonotic diseases from wildlife and livestock to people, with devasting consequences for public health. The factors affecting the ecology and evolution of the transmission dynamics of these mosquito-borne pathogens can be revealed using multidisciplinary research approaches. This 7th volume of the ECVD series focuses on the ecological factors that determine the transmission dynamics of mosquito-borne pathogens naturally circulating between animals of different taxa and their importance for human health. The authors revise the current knowledge on the pathogens that affect wildlife, including those maintained in captivity, as well as the use of cutting-edge techniques for the identification of potential vectors of these pathogens. In addition, this volume explores the role of factors related to global change, including changes in landscape use, deforestation and urbanization, as major drivers of the distribution of mosquito vectors and the dynamics of pathogen transmission. Finally, updated information on the approaches used to identify and control mosquito-borne diseases is presented, with a particular focus on those affecting humans. In summary, this book provides an updated review of the different mosquito-borne pathogens affecting animals and their public health relevance.
Do you want to support dairy farmers in adjusting their management regarding the transition period of dairy cows? The book Pathways to health and disease for dairy cows provides veterinarians and farm advisors background information and practical tools. This unique book combines theoretical information with practical tools, and draws crosslinks between six aspects of transition cow biology. The book comprises two parts: an introduction chapter and six study chapters.
The first chapter outlines new ideas about the role of management in dairy farming:
- External conditions, comprising environment and farm management, continuously influence the internal body management of the cow.
- External conditions either support physiology or induce pathophysiology and pathology, for which new definitions are introduced.
- Advisory work on dairy farms must be based on the management of external conditions and not on herd performance data.
The six study chapters focus on the transition period and provide the reader with updated contemporary knowledge on (patho)physiology and pathology, and how they connect with risk factors, preventive measures, and monitoring tools.
Veterinarians and farm advisors must make a professional U-turn to support dairy farmers in solving and preventing disturbances in health and production. This book must be regarded as a start for resetting our traditional view and approach to cow health and disease.
The first chapter outlines new ideas about the role of management in dairy farming:
- External conditions, comprising environment and farm management, continuously influence the internal body management of the cow.
- External conditions either support physiology or induce pathophysiology and pathology, for which new definitions are introduced.
- Advisory work on dairy farms must be based on the management of external conditions and not on herd performance data.
The six study chapters focus on the transition period and provide the reader with updated contemporary knowledge on (patho)physiology and pathology, and how they connect with risk factors, preventive measures, and monitoring tools.
Veterinarians and farm advisors must make a professional U-turn to support dairy farmers in solving and preventing disturbances in health and production. This book must be regarded as a start for resetting our traditional view and approach to cow health and disease.
Do you want to support dairy farmers in adjusting their management regarding the transition period of dairy cows? The book Pathways to health and disease for dairy cows provides veterinarians and farm advisors background information and practical tools. This unique book combines theoretical information with practical tools, and draws crosslinks between six aspects of transition cow biology. The book comprises two parts: an introduction chapter and six study chapters.
The first chapter outlines new ideas about the role of management in dairy farming:
- External conditions, comprising environment and farm management, continuously influence the internal body management of the cow.
- External conditions either support physiology or induce pathophysiology and pathology, for which new definitions are introduced.
- Advisory work on dairy farms must be based on the management of external conditions and not on herd performance data.
The six study chapters focus on the transition period and provide the reader with updated contemporary knowledge on (patho)physiology and pathology, and how they connect with risk factors, preventive measures, and monitoring tools.
Veterinarians and farm advisors must make a professional U-turn to support dairy farmers in solving and preventing disturbances in health and production. This book must be regarded as a start for resetting our traditional view and approach to cow health and disease.
The first chapter outlines new ideas about the role of management in dairy farming:
- External conditions, comprising environment and farm management, continuously influence the internal body management of the cow.
- External conditions either support physiology or induce pathophysiology and pathology, for which new definitions are introduced.
- Advisory work on dairy farms must be based on the management of external conditions and not on herd performance data.
The six study chapters focus on the transition period and provide the reader with updated contemporary knowledge on (patho)physiology and pathology, and how they connect with risk factors, preventive measures, and monitoring tools.
Veterinarians and farm advisors must make a professional U-turn to support dairy farmers in solving and preventing disturbances in health and production. This book must be regarded as a start for resetting our traditional view and approach to cow health and disease.
Abstract
A digestibility study with laying hens was carried out to determine the nutritional value of a commercial and representative (batch to batch variance adjusted) insect meal based on Hermetia illucens (HI) larvae, (from black soldier fly) which was the objective in this study. A basal diet (BD; CP 15%), formulated and fed as such and an experimental diet (HD; CP 21%) consisting of BD with inclusion of 18% of the HI meal were used in the study. The BD and HD were fed to eight and six replicate metabolic cages, respectively, with eight Dekalb White laying hens each from 25 to 27 weeks of age. Diets (pelleted with TiO2 as marker) and water were available for ad libitum intake. Excreta was collected during the last three days to determine AMEn and apparent total tract faecal nutrient digestibility coefficients (ATTDC). Distal ileal content was collected at the last day of the experiment to determine apparent ileal amino acids digestibility of diets and HI meal. Using table values for endogenous losses standardised ileal amino acids digestibility coefficient (SIDC) of HI meal were also calculated. Analysed nutrients (g/kg) in HI meal were: 47 moisture, 529 crude protein, 71 ash, 135 fat and thus 218 was calculated as carbohydrates. Determined AME AMEn for HI meal was 3,846 kcal/kg dry matter (DM) and AMEn was 3,498 3,671 kcal/kg DM and ATTDC AFD for crude protein, crude fat and carbohydrates was 0.830, 0.940 and 0.680, respectively. Average SID coefficient for the 18 amino acids was 0.861 86.1%. Among indispensable amino acids SIDC ranged from 0.790% for threonine to 0.950% for phenylalanine and was 0.840% for lysine. These findings highlight that HI meal is an interesting alternative protein source for soybean meal (SBM). Besides market prices and availability, demands for more sustainable poultry production will determine the use of HI meals as alternative for SBM in poultry diets in the near future, especially in regions where SBM is imported from overseas.
Abstract
The Asian giant hornet, Vespa magnifica is an edible insect fondly eaten in larval and adult stage in maximum ethnic communities of the Northeast India especially in Manipur state. The nutritional and anti-nutritional aspects of V. magnifica revealed high protein (31.1%, 38.4%), fat (22.0%, 8.13%), carbohydrates (1.67%, 0.72%) and fibre (0.69%, 4.34%) content in both larval and adult stage respectively. The results exhibited that consumption of 100 gram of V. magnifica in larval and adult stage provided optimal amount of energy (329.1 and 229.7 kcal, respectively). Iron, potassium, calcium, sodium, and phosphorus are the most prevalent minerals found in the edible hymenopteran that can be used as supplementary food to human diets. The IC50% of adults (0.701 mg/ml) exhibited lower value than larvae (0.813 mg/ml) expressing its stronger antioxidant properties than larval hymenopteran. Low levels of anti-nutritional components such as phenol (38.7 and 30.3 mg/g) and tannin (50.0 and 24.5 mg/g) have established the insects’ non-toxic character when taken as part of a human diet. The insect is widely available in Manipur local markets but at a very high price and great demand. It has the potential to support economic upliftment, nutrition and food security along with sustainable impact on environment.
Authors:
, , , , , and
Abstract
Insects are increasingly considered as a relevant alternative protein source in the transition to a more circular economy and more sustainable food production. Understanding the profitability of insect farms is crucial for starting entrepreneurs, established rearers, and third parties. In this study we analysed the revenues and expenses of seven T. molitor farms in the Netherlands, representing approximately a quarter of the total sector. We calculated their gross margin and net present value. Revenues came from the sales of fresh larvae and insect frass, and from extension services. Expenses included investments, and non-allocated and variable expenses. Results cover technical and economic results, and a qualitative description of farm operations. The gross margins and net present values ranged from −180 to 2,030 and from −12,359 to 15,535 EUR/tonne fresh larvae production, respectively. The main determinants of T. molitor farms’ profitability included the sales price of larvae, and its labour and substrate expenses. Our estimates can be used by decision making of farmers, credit providers, and policy makers to support the growth of this still very small, but emerging sector.
Authors:
, , , , , , , , , , , , and
Abstract
Globally, large amounts of various crops such as cereals, oilseeds, nuts and spices are contaminated with mycotoxins during pre-harvest, postharvest handling, processing and/or storage. Mycotoxin contamination results into economic and health issues, and valorisation options of contaminated crops are urgently needed. The aim of this research was to evaluate whether quality feed and fertilizer can be safely produced from naturally mycotoxin contaminated crops using black soldier fly larvae (BSFL, Hermetia illucens L.) under realistic field conditions in East Africa. Naturally mycotoxin contaminated maize (corn; Zea mays L.) was used as a model due its prevalence as food and feed and utilized by BSFL together with local agri-food by-products at a research facility in Rwanda. To assess the influence of the initial maize mycotoxin contamination and maize inclusion, larval diets with three mycotoxin contamination levels and two maize inclusion levels were tested. BSFL were tolerant against the high mycotoxin concentrations (e.g. 99.4 μg aflatoxin B1 kg dry mass-1) as the presence of mycotoxins in the substrate did not affect BSFL mass at harvest. Product safety was assessed by quantifying the presence of 38 common and emerging mycotoxins and metabolites in the maize, substrates and BSFL products (e.g. larvae and frass). The results show that it is possible to produce feed and fertilizer with BSFL considered safe within the European Union and East African legal limits with maize contaminated with mycotoxins typical for East Africa. Thereby, this research works towards the safe recycling of nutrients from mycotoxin contaminated maize within the food system in East Africa and beyond.
Abstract
Feeding poultry with live insect larvae stimulates natural behaviour and improves poultry welfare, when poultry has prolonged or frequent access to the larvae. But how to feed live insect larvae to poultry without labour-intensive hand feeding? This paper focusses on the development of a device that overcomes this challenge. A circular device was designed with eight storage compartments, which were filled once a day with live Black Soldier Fly (BSF) larvae (Hermetia illucens). A motor controlled the timed rotation of the device multiple times per day, initiating the release of larvae when a compartment was pushed over an outlet. Every 60 minutes, a new compartment was pushed over the outlet, which means that after eight hours all compartments are emptied. To achieve a gradual release of larvae per storage compartment the device was timed to move every 30 minutes half a storage compartment forward. The larval release was recorded every 5 minutes within the 60 minutes. The device was tested at 18 °C, 24 °C and 30 °C, with 3.4 g and 129.8 g BSF larvae per compartment, and with three different outlet types of different size and shape. The larval release rate was influenced by temperature, amount of larvae, outlet type, and interactions between these factors. After placing a new compartment above the outlet, 50% of the larvae were on average released within 6 minutes. After 60 minutes, on average only 0.5% larvae remained in the compartment. Outlets with wider openings are preferred over the outlet with the narrowest outlet because less larvae remained in the compartments. The dispenser fulfilled the low-labour-intensity requirement as filling was only necessary once a day, the release of different amounts of larvae was achieved over several hours. This automatic dispenser provides a valuable tool to investigate the behaviour of poultry fed with live BSF larvae.
Authors:
, , , , , , , , , , , and
Abstract
Gut microbiota may have therapeutic effects on inflammatory bowel disease (IBD). Regulating intestinal microbiota through Lactiplantibacillus plantarum (L. plantarum) and faecal microbiota transplantation (FMT) is a novel approach to treating IBD. This study aimed to explore the effect of L. plantarum and FMT pretreatment in alleviating colitis in mice. Five groups of mice (n = 6 per group) were included: CON group, DSS group (dextran sodium sulphate-induced colitis mice), LP-DSS pretreatment group (colitis mice were given strain L. plantarum and 5% DSS), DSS-FMT group (mice pretreated with faecal microbiota transplantation were given 5% DSS), and LP-FMT pretreatment group (mice pretreated with faecal microbiota transplantation and L. plantarum were given 5% DSS). Serum metabolites and intestinal microbiota were analysed by 16S rRNA sequencing liquid chromatography-mass spectrometry (LC-MS). The results demonstrated that L. plantarum and FMT improved gut microbiota in mice by increasing Firmicutes and decreasing the Bacteroidetes. In the serum metabolomics analysis, there were 11 differential metabolites in the DSS-FMT and LP-FMT pretreatment groups, and these differential metabolites were mainly glycerophospholipids and sphingolipids. It is worth noting that Lachnospira and Lactobacillus were positively associated with 8 differential metabolites. These results suggest that L. plantarum and FMT can regulate intestinal microorganisms and serum metabolomics to alleviate inflammation.
Authors:
, , , , , and
Abstract
The secondary metabolite 3-nitropropionic acid (3-NPA) is produced by certain fungi. The metabolite is a potent toxin which inhibits the citric acid cycle. A medical case from 2021 described a 69-year-old Danish man who ingested 3-nitropropionic acid contaminated coconut water. The man died 26 hours after ingestion. Subsequent analysis identified Apiospora saccharicola as the fungi responsible for synthesising 3-NPA in the coconut. The metabolic pathway for 3-NPA is unknown but is thought to be activated by adverse growth conditions. This study aimed to confirm that Apiospora can produce 3-NPA within coconuts and develop a quick and easy method for detection of 3-NPA in coconut water using 1H NMR. This method can possibly aid in detection of 3-NPA in contaminated groceries, such as coconut water.