EFFECT OF DIFFERENT DIETS ON SOME LARVAL BODY CHARACTERISTICS AND FOOD UTILIZATION EFFICIENCY OF TENEBRIO MOLITOR (COLEOPTERA: TENEBRIONIDAE) (original) (raw)
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Evaluation of various commodities for the development of the yellow mealworm, Tenebrio molitor
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We evaluated the suitability of forty-four commodities (i.e., cereal flours and meals, non-flour, cereal commodities, legumes and various commodities of vegetative and animal origin) as oviposition and feeding substrates for the yellow mealworm, Tenebrio molitor. Τen T. molitor adults were introduced in plastic vials containing 30 g of each commodity. At the end of the 1 week period, all adults were removed, and mortality was determined; then the vials were further incubated for additional 9 weeks. After this time, the vials were opened, and the larvae of each vial were separated from the feeding substrate, counted and weighed as a group. The efficiency of ingested food conversion was calculated for each substrate. Finally, proximate composition was calculated to determine the nutrient components of the feeding substrates tested and the T. molitor larvae that fed on various selected substrates. In general, adult reproduction was clearly favoured by most amylaceous substrates tested,...
Growth Optimization and Rearing of Mealworm (Tenebrio molitor L.) as a Sustainable Food Source
Foods
As a sustainable food source for humans, mealworms (Tenebrio molitor) have a great deal of potential, due to the fact that they have a very favorable nutritional profile and a low environmental impact. For meal production, feed formulation and optimization are important. The mealworm Tenebrio molitor (Coleoptera: Tenebrionidae) is the most consumed insect in the world. Mealworms were given a variety of diets, including wheat bran as constant diet supplemented with different levels of Ospor (Bacillus clausii) at 0.002 g, 0.004 g, 0.006 g, and 0.008 g; imutec (Lacticaseibacillus rhamnosus) at 0.2 g. 0.4 g, 0.6 g, and 0.8 g; fungi (Calocybe indica) at 250 g, 500 g, and 750 g; yeast (Saccharomyces cerevisiae) at 50 g, 100 g, and 150 g; and wheat bran (standard diet) were examined in complete randomized design (CRD). Different parameters, i.e., the larval, pupal, and adult weight, size, life span, and nutritional profile of mealworm were studied. When compared with other insect growth pr...
Journal of Insect Physiology, 2015
Please cite this article in press as: van Broekhoven, S., et al. Growth performance and feed conversion efficiency of three edible mealworm species (Coleoptera: Tenebrionidae) on diets composed of organic by-products Q1 . Journal of Insect Physiology (2015), http://dx.Please cite this article in press as: van Broekhoven, S., et al. Growth performance and feed conversion efficiency of three edible mealworm species (Coleoptera: Tenebrionidae) on diets composed of organic by-products Q1 . Journal of Insect Physiology (2015), http://dx.Please cite this article in press as: van Broekhoven, S., et al. Growth performance and feed conversion efficiency of three edible mealworm species (Coleoptera: Tenebrionidae) on diets composed of organic by-products Q1 . Journal of Insect Physiology (2015), http://dx.Please cite this article in press as: van Broekhoven, S., et al. Growth performance and feed conversion efficiency of three edible mealworm species (Coleoptera: Tenebrionidae) on diets composed of organic by-products Q1 . Journal of Insect Physiology (2015), http://dx.Please cite this article in press as: van Broekhoven, S., et al. Growth performance and feed conversion efficiency of three edible mealworm species (Coleoptera: Tenebrionidae) on diets composed of organic by-products Q1 . Journal of Insect Physiology (2015), http://dx.Please cite this article in press as: van Broekhoven, S., et al. Growth performance and feed conversion efficiency of three edible mealworm species (Coleoptera: Tenebrionidae) on diets composed of organic by-products Q1 . Journal of Insect Physiology (2015), http://dx.Please cite this article in press as: van Broekhoven, S., et al. Growth performance and feed conversion efficiency of three edible mealworm species (Coleoptera: Tenebrionidae) on diets composed of organic by-products Q1 . Journal of Insect Physiology (2015), http://dx.Please cite this article in press as: van Broekhoven, S., et al. Growth performance and feed conversion efficiency of three edible mealworm species (Coleoptera: Tenebrionidae) on diets composed of organic by-products Q1 . Journal of Insect Physiology (2015), http://dx.
Agriculture
The nutrient composition of yellow mealworm (YM) Tenebrio molitor varies based on the stages of the life cycle, the rearing conditions, and the feeding substrate. This study monitored the growth of yellow mealworm larvae at 8, 10, and 12 weeks of age, separating samples into large-sized and small-sized insects. During the experiment, we measured the nutrient composition: dry matter (DM), crude protein (CP), crude fat (CF), crude fibre, chitin, crude ash, and nitrogen free extract (NFE) of YM at different age groups and sizes. We measured the nutrient composition of the pre-moult, moult, cuticle, and pupae as well. The results show that there is no significant difference between the compositions of the different age groups, but larger-sized individuals had a higher DM and crude fibre and lower chitin and NFE than the smaller sizes. The pre-moult and moult stages showed no significant difference in nutrient composition. Although the cuticle had a high DM (97.5%), that did not cause an...
European Journal of Entomology
http://www.eje.cz Morales-Ramos et al. (2011) formulate an optimal composition of the diet for larvae of T. molitor based on choice tests. This diet consists of 80% wheat bran and 20% potato fl akes (60% carbohydrates, 32% protein and 8% fat) and results in optimal larval growth. However, when larvae are not given a choice, different diets result in optimal growth. The optimum no-choice diet consists of 90% wheat bran and 10% potato fl akes (64% carbohydrates, 29% protein and 7% fat) (Morales-Ramos et al., 2011). Further optimization resulted in an increase in adult fecundity, but no improvement in food utilization effi ciency, growth, development time or survival during the larval stage. The requirement for protein is confi rmed by both Oonincx et al. (2015) and van Broekhoven et al. (2015). They show that larvae have higher survival rates and shorter development times when fed high protein diets (> 20%). Several studies provide a more in-depth assessment of the nutritional The effects of the particle size of four different feeds on the larval growth of Tenebrio molitor (Coleoptera: Tenebrionidae)
Larvae of mealworm (Tenebrio molitor L.) as European novel food
Agricultural Sciences, 2013
For centuries, insects have been used as food due to their availability and easiness in raising that is much less burdensome for environment than animal husbandry breeding. Mealworm (Tenebrio molitor L.) is a store-pest of which larvae are consumed by people. The aim of the work was to determine the nutritional value of larvae of mealworm (Tenebrio molitor L.). The material was a three-month-old mealworm larva 25-30 mm in length. Larvae were boiled for 3 min and next dried in 60˚C. Contents of water, ash, minerals, protein, fat and fat acids profile have been determined. Fresh larvae contained 56% of water, 18% of total protein, 22% of total fat and 1.55% of ash. High contents of minerals were found in the larvae: magnesium (87.5 mg/100g), zinc (4.2 mg/100g), iron (3.8 mg/100g), copper (0.78 mg/100g) and manganese (0.44 mg/100g). The proportion of n-6/n-3 fatty acids was very advantageous and amounted to 6.76. Larvae powder contained twice higher content of protein, fat, ash and minerals. Larva of mealworm is a valuable source of nutrients in amounts more profitable for human organism than traditional meat food. Powdered larva is a high-grade product to be applied as a supplement to traditional meals.
Journal of Insect Science, 2021
In order to investigate a low-cost and sustainable food source, the present study evaluated the use of poultry litter for rearing Tenebrio molitor Linnaeus, 1758 (Coleoptera: Tenebrionidae). The experiment was performed with five diets containing increasing levels of poultry litter (0, 25, 50, 75, and 100%) replacing the control diet and five replicates with 50 larvae per sample unit. Larval growth and development were evaluated and the chemical compositions of diet and T. molitor larvae were determined. Larval development and reproduction efficiency of T. molitor were similar in all treatments. The sole use of poultry litter to feed T. molitor reduced the crude protein of flour by only 8%. Including 50% or more poultry litter in the standard diet is the best-suited formulation for larvae production and incorporation of minerals in the larvae. Mealworm can be grown successfully on diets composed by poultry litter, the diet did not affect survival, growth, and development; however, ...
Nutritional Value of Mealworm, Tenebrio molitor as Food Source
International Journal of Industrial Entomology, 2012
Nutrition value of mealworm, Tenebrio molitor was analyzed due to increasing demand of usage as a protein source for domestic animals and even further for human consumption. The purpose of the present work was to determine the chemical compostion of the Tenebrio molitor larvae, adult that were maintained under standard condition for further usage of mass-rearing system and its exuvium, and excreta. Tenebrio molitor, larvae, adult, exuvium and excreta contained 46.44, 63.34, 32.87, and 18.51% protein respectively, suggested that even excreta could be used as an additional supplement in food recycling process. This protein was also rich in amino acids such as Isoleucine, leucine and Lysine which all met the nutritional value recommended by the Food and Agriculture Organization. Fatty acid composition was detected with high component of oleic acid (C18:1), along with linoleic acid (C18:2) and palmitic acid (C16) in all adult, larvae, exuvium and excreta. These oleic acid (C18:1), linoleic acid (C18:2) and palmitic acid (C16) components were the same or even highly contained in excreta of mealworm 22.29, 47.19 and 19.17% respectively. Longer chains of unsaturated fatty acids consisted of two to three double bonds are known as healthy product was recognized in large amount. These results show new ways to consume mealworms and its waste for animal and human consumption.
Larvae of mealworm (<i>Tenebrio molitor</i> L.) as European novel food
Agricultural Sciences, 2013
For centuries, insects have been used as food due to their availability and easiness in raising that is much less burdensome for environment than animal husbandry breeding. Mealworm (Tenebrio molitor L.) is a store-pest of which larvae are consumed by people. The aim of the work was to determine the nutritional value of larvae of mealworm (Tenebrio molitor L.). The material was a three-month-old mealworm larva 25 -30 mm in length. Larvae were boiled for 3 min and next dried in 60˚C. Contents of water, ash, minerals, protein, fat and fat acids profile have been determined. Fresh larvae contained 56% of water, 18% of total protein, 22% of total fat and 1.55% of ash. High contents of minerals were found in the larvae: magnesium (87.5 mg/100g), zinc (4.2 mg/100g), iron (3.8 mg/100g), copper (0.78 mg/100g) and manganese (0.44 mg/100g). The proportion of n-6/n-3 fatty acids was very advantageous and amounted to 6.76. Larvae powder contained twice higher content of protein, fat, ash and minerals. Larva of mealworm is a valuable source of nutrients in amounts more profitable for human organism than traditional meat food. Powdered larva is a high-grade product to be applied as a supplement to traditional meals.