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Strain effect on the adult performance of the yellow mealworm,Tenebrio molitor L.

In: Journal of Insects as Food and Feed
Authors:
C. Adamaki-Sotiraki Laboratory of Entomology and Agricultural Zoology, Department of Agriculture, Crop Production and Rural Environment, University of Thessaly, Volos, 38446, Greece.

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https://orcid.org/0000-0002-0777-3634
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C.I. Rumbos Laboratory of Entomology and Agricultural Zoology, Department of Agriculture, Crop Production and Rural Environment, University of Thessaly, Volos, 38446, Greece.

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C.G. Athanassiou Laboratory of Entomology and Agricultural Zoology, Department of Agriculture, Crop Production and Rural Environment, University of Thessaly, Volos, 38446, Greece.

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Mass rearing ofTenebrio molitor L. (Coleoptera: Tenebrionidae) is currently at its infancy, looking for new strategies in order to ameliorate its capabilities. That being the case, several efforts have been made towards optimisation of rearing methods of the larval stages, while more recent research is also directed towards optimisation of the reproductive output ofT.molitor adults. Yet, there are very few published data concerning the strain effect on the adults’ performance. Thus, the aim of the present study was to comparatively evaluate fitness-related traits, i.e. adult survival, egg production and hatching rate, of sixT.molitor strains from five countries (Greece, Italy, Germany, Turkey and Spain). Based on the results, considerable differences were detected in the fitness-related traits of the strains tested. The highest cumulative egg numbers were recorded for the Spanish, the Italian I and the Greek strain, in contrast to the German one which had the lowest cumulative number of eggs. Hatching rate and survival was high for all strains tested, with the exception of the German strain. In general, the reproductive output for the Greek strain was the highest, both in terms of egg production and hatching rate. The results of our study aim to emphasise on the need for proper strain selection taking into consideration, apart from larval growth and performance, the progeny production capacity of adults, in order to increase the efficiency ofT. molitor production.

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