| Author | Rohit , Pothula Babloo |
| Call Number | AIT Thesis no.AQ-19-04 |
| Subject(s) | Fishes--Feeding and feeds
|
| Note | A thesis submitted in partial fulfillment of the requirements for the
degree of Master of Engineering in
Aquaculture and Aquatic Resource Management, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. AQ-19-04 |
| Abstract | The aim of this experiment was to evaluate the replacement of fishmeal with the insect
meal prepared from two-spotted cricket Gryllus bimaculatus at varying levels in the feed
for Nile tilapia Oreochromis nilotics and to study the growth performance of tilapia under
different feeding regimes. Cricket meal (CM) was included in the diet of tilapia in varying
percentages of CM0, CM25, CM50, CM75 and CM100 (0%, 25%, 50%, 75% and 100%
fishmeal replacement, respectively). For determination of feed utilization chromic oxide
insert marker was used at a concentration of 0.5% in each of five test diets. The experiment
was conducted in 15 circular cement tanks with three replicates for each treatment, in a
semi-recirculating water system for 60 days. Each tank was stocked with 40 tilapia
fingerlings ranging in size from 1.40 to 1.56 g. The results of growth trial showed that the
test diet CM25 and CM50 had the highest weight gain, while the survival rate (99.2%)
recorded for CM25 was significantly (p>0.05) better than CM50 (98.3%). Also, CM25
showed better Specific Growth Rate (SGR) and Daily Growth Rate (DGR). The test diet
CM75 showed similar results as that of control diet CM0. The lowest performance
parameters were obtained for the diet CM100 in terms of total weight gain, Apparent Net
Protein Utilization (ANPU), Protein Efficiency Ratio (PER), Feed Intake per fish (FI) and
FCR. The same trend was also obtained for the feed utilization with CM25 and CM50
showing better utilization of feed in terms of dry matter, protein and energy, while the
CM0 and CM75 were almost similar. Quadratic regression analysis was done to determine
the best yield and growth performance, which revealed that the maximum growth was
found between 20% to 30% of cricket meal inclusion in the diet. At higher levels of
inclusion of CM, the digestibility was poor, apparently because of the presence of chitin in
insect meal. Further studies on meat quality, amino acid profile, hematology and plasma
analysis are recommended to elucidate the factors underlying the successful inclusion
levels of insect meal in practical fish diets. |
| Year | 2019 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AQ-19-04 |
| Type | Thesis |
| School | School of Environment, Resources, and Development |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Aquaculture and Aquatic Resources Management (AQ) |
| Chairperson(s) | Salin , K. R.; |
| Examination Committee(s) | Loc Thai NguyenYakupitiyage, Amararayne Norarat P. ; |
| Scholarship Donor(s) | Asian Institute of Technology Fellowship; |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2019 |