Evaluation of diets formulated using local resources for (Pangasius hypophthalmus) in LAO PDR | |
| Author | Boonthanom Chamsinhg |
| Call Number | AIT Thesis no.AQ-03-34 |
| Subject(s) | Fishes -- Feeding and feeds Elemental diet |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. AQ-03-34 |
| Abstract | A resource survey was conducted to identify potential feed resources in sixty households of six districts in Vientiane and Champasak provinces. The aim of the survey was to assess the availability of animal and fish feed ingredients and their prices in study areas. Also, it identified feeding system and methods of home made fish feed processing in the households of study areas. Rapid Rural Appraisal methods were employed to assess the resources, and utilization of feedstuff that are available in the local areas, and then to produce two diets trial for Pangasius hypophthalmus. Findings from the survey showed that there are very few local feed ingredients that are possible to formulate fish feed in small-scale fanns in both provinces. A feeding experiment was conducted to evaluate effects of diets formulated by using feedstuff from Vientiane and Champasak provinces to test the growth of Pangasius hypophthalmus. The experiment was conducted in blue net cages (hapas) size 2 m (L) x 3 m (W) xl.8 m (D) installed in an earthen pond of Nam Houm fish farm. A completely randomized design with three treatments with four replicates was used. Fish were stocked at 25 fish per cage (with averaging initial weight 199g). Two experimental diets were formulated to contain 25% protein level (TA and TB) and compared with a commercial catfish feed (TC). While dry small fish Clupeichthys aesarnensi~ยท (Ra Keo) 21.98% +rice bran 27.91% and broken rice 50.11% from Vientiane province were used to formulate one diet (Diet A) and dry small fish Henicorhychw; siamensis (Pa Soi) 30.40% + rice bran 26.35% and 43.26% broken rice from Champasak Province were used to formulate second diet (Diet B). Experimental fish were fed twice daily at a rate of 3% for 35 days. The results indicated that fish fed control diet in treatment C had significantly higher (P>0.05) mean final weight, weight gain, percentage weight gain and daily weight gain. Fish fed two test diets (A and B) had lower growth rates and high food conversion ratio (FCR) and high protein efficiency ratio (PER) (2.94, 3.08 and 3.11 respectively), and apparent net protein utilization of fish fed control diet was higher (0.37) than fish fed diets B and A (0.33 and 0.31 respectively). Economic analysis of feed showed that diets formulated (A and B) using local raw materials had lower price per kilogram of feed than commercial diet (C). However, both diets indicated feed cost for producing one kilogram of fish that were similar to fish farmgate price, and therefore two formulated diets (A and B) in this study were uneconomical to Lao farmers. |
| Year | 2003 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AQ-03-34 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| 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) | Yakupitiyage, Amararatne; |
| Examination Committee(s) | Pant, Jharendu ;Yi, Yang; |
| Scholarship Donor(s) | Swedish International Development Agency (Sida); |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2003 |