Evalutaion of dietary inclusion of mealworm (Tenebrio molitor) meal as an alternative protein source in practical diets for juvenile rainbow trout (Oncorhynchus mykiss)
- 주제(키워드) 도움말 Tenebrio molitor , Alternative protein , Essential amino acids , Growth performance , Hematological parameters , rainbow trout , Oncorhynchus mykiss , Innate Immunity
- 발행기관 강릉원주대학교 일반대학원
- 지도교수 도움말 Sang-Min Lee
- 심사위원 Joong-Kyun Jeon, Su-Hee Hong, Sang-Min Lee
- 발행년도 2018
- 제출일 2018.06.27
- 학위수여년월 2018. 8
- 학위명 석사
- 학과 및 전공 도움말 일반대학원 해양생물공학과
- 실제URI http://www.dcollection.net/handler/kangnung/000000010255
- UCI I804:42001-000000010255
- 본문언어 영어
- 저작권 강릉원주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약 도움말
An 8-week feeding trial was designed to evaluate the potential of yellow mealworm (Tenebrio molitor) as a locally available nutrient-rich feedstuff for juvenile rainbow trout (Oncorhynchus mykiss). Experimental diets containing elevated levels of mealworm meal (WM) were formulated to be isonitrogenous and isolipidic to a WM free fishmeal (FM) based control diet (designated as WM0, WM7, WM14, WM21 and WM28, respectively). Triplicate groups of fish (Mean ± S.E.; 1.11 ± 0.01 g) were fed one of the experimental diets to apparent satiation twice daily for 8 weeks. Fish growth performance in terms of weight gain (WG) and specific growth rate (SGR) significantly increased with increasing dietary WM level up to 14%, and then declined when dietary WM levels further increased from 21 to 28%. The results of the present study showed that rainbow trout fed diets containing graded levels of WM had significant reductions in daily feed intake (DFI) and daily protein intake (DPI) during the eight-week feeding trial. Feed efficiency (FE) and protein efficiency ratio (PER) were significantly improved for fish fed with diets containing WM compared to fish fed the control WM-free diet (WM0). There was no definite trend of whole body nutrient composition as a result of the dietary WM inclusion. Fillet proximate composition of rainbow trout did not differ when dietary WM replaced FM. However, resulting fillets from WM21-fed fish had significantly higher content of phenylalanine than the WM0-fed fish. Selected hematological values were not affected by dietary treatment. No signifcant differences were found in serum superoxide dismutase (SOD) or glutathione peroxidase (GPx) activities of juvenile rainbow trout fed the various experimental diets; however, myeloperoxidase activity was significantly higher in fish fed 7% WM compared to fish fed the control WM-free diet. Furthermore, fish fed WM14 and WM28 diets had significantly higher lysozyme activities after eight weeks of feeding compared to fish fed the diet without WM (WM0). These findings suggested that WM might prove to be a promising alternative to FM in practical diets for early juvenile stage of rainbow trout. Indeed, dietary utilization of WM in rainbow trout diets have generated encouraging results with fish growing well on dietary levels as high as 28% without any adverse impacts on fish performance and health.
more목차 도움말
CONTENTS
page
LISTS OF TABLES i
LISTS OF FIGURES ii
Abstract 1
1. Introduction 3
2. Materials and methods 6
2.1.Experimental diets 6
2.2.Fish and feeding trials 9
2.3. Sample collection and analysis 10
2.4. Statistical analysis 14
3. Results 15
4. Discussion 26
국문요약 31
Acknowledgment 32
References 33
