Mealworm meal use in sea trout (Salmo trutta m. trutta, L.) fingerling diets: effects on growth performance, histomorphology of the gastrointestinal tract and blood parameters

Insect meals are a group of promising feed materials and sources of nutrients. Their production does not entail deforestation, global warming, environmental pollution or decreased biodiversity. One of the most important farmed insect species is mealworm, which is allowed to be used in aquafeeds by t...

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Published inAquaculture nutrition Vol. 27; no. 5; pp. 1512 - 1528
Main Authors Hoffmann, Lilianna, Rawski, Mateusz, Nogales‐Mérida, Silvia, Kołodziejski, Paweł, Pruszyńska‐Oszmałek, Ewa, Mazurkiewicz, Jan
Format Journal Article
LanguageEnglish
Published Oxford Hindawi Limited 01.10.2021
Subjects
Aquaculture feeds
Biodiversity
Blood
Climate change
Deforestation
Diet
dose response
Feeds
Fingerlings
Fish
Food conversion
Freshwater fishes
Gastrointestinal tract
Global warming
Growth rate
insect meal
Insects
Intestines
mealworm
Nutrients
Parameters
Physical growth
Pollution control
Salmo trutta
Salmo trutta m. trutta
sea trout
Survival
Tenebrio molitor
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Summary:Insect meals are a group of promising feed materials and sources of nutrients. Their production does not entail deforestation, global warming, environmental pollution or decreased biodiversity. One of the most important farmed insect species is mealworm, which is allowed to be used in aquafeeds by the European Commission Regulation no. 2017/893. The aim of this study was to examine four doses of mealworm meal (TM10 = 10%, TM20 = 20%, TM30 = 30% and TM40 = 40%) in sea trout (Salmo trutta m. trutta) fingerling diets and their effects on growth performance, somatic and condition indices, blood parameters, histomorphological characteristics and body composition. Our results showed the most satisfactory growth performance results with 10% mealworm meal. The feed conversion ratio (FCR), protein efficiency ratio (PER), relative growth rate (RGR) and specific growth rate (SGR) was similar in the control and TM10 group. The lowest fish survival (95%) was occurred in the group of fish fed TM40, and the highest (98.33%) in fish fed control or TM10 diets. The fish condition and the hepatosomatic index were similar among treatments. The histomorphological structures of the intestine and liver were not negatively affected by the experimental diets. The inclusion of up to 40% mealworm meal did not negatively affect growth performance, feed utilization, fish health or survival.
ISSN:1353-5773
1365-2095
DOI:10.1111/anu.13293