SWEDISH UNIVERSITY OF AGRICULTURAL SCIENCES (SLU)

 
PhD studies supported by MEKARN
 
Evaluation of local feed resources for hybrid catfish (Clarias macrocephalus x C. gariepinus) in smallholder fish farming systems in central Vietnam
 
Nguyen Duy Quynh, Tram (2010) Evaluation of local feed resources for hybrid catfish (Clarias macrocephalus x C. gariepinus) in smallholder fish farming systems in central Vietnam. Doctoral diss. Dept. of Animal Nutrition and Management, SLU. Acta Universitatis agriculturae Sueciae vol. 2010:72.
 
Full text available as:
 
Abstract
 
The aim of this thesis was to examine the current feeding situation for fresh water fish in Central Vietnam, to evaluate the potential nutritive value of locally available feed resources for hybrid catfish (Clarias macrocephalus x C. gariepinus) and Nile tilapia, to determine the dietary requirement of lysine for hybrid catfish, to estimate the requirements for the other essential amino acids (EAA) by using ideal protein concept, and finally to evaluate the suitability of cassava leaf meal and shrimp head meal as a partial replacement for fish meal in the diet, without or with lysine supplementation, for hybrid catfish fingerlings.
 
The survey indicated that, in total, 22 feed ingredients were used by the farmers. The main ingredients were cassava root meal, rice bran, cassava residue, groundnut meal, soybean meal and fish meal. Furthermore, several more unconventional feedstuffs were also commonly used, such as cassava leaves, coconut meal, shrimp head meal, sesame husk and squid by-product. The combination of ingredients used in farm-made fish feeds varied among farms and districts leading to a large variation of nutrient composition and energy content. The fish yield varied among districts and ranged from 0.8 to 6.5 t ha-1. The digestibility trial showed that the apparent digestibility (AD) of dry matter (DM), organic matter (OM) and crude protein (CP) in cassava leaf meal was significantly lower than in groundnut meal, soybean meal, sesame husk meal and shrimp head meal in both hybrid catfish and Nile tilapia. The AD of DM and OM in cassava leaf meal was higher in hybrid catfish than in Nile tilapia. Most EAA in the selected feedstuffs were equally well utilized by the two fish species. In the third experiment, the dietary lysine requirement of hybrid catfish fingerlings was found to be 56 g kg-1 of CP, corresponding to 16.8 g kg-1 of dry diet. In the feeding trial with hybrid catfish, replacing fish meal with shrimp head meal had no effect on final weight (FW) and specific growth rate (SGR), while replacing fish meal with cassava leaf meal led to impaired FW and SGR. Supplementing cassava leaf meal and shrimp head meal diets with lysine improved FW and SGR.
 
Faculty: Faculty of Veterinary Medicine and Animal Science
Keywords:
amino acids, cassava leaf meal, Clarias macrocephalus x C. gariepinus, digestibility, fish meal, ideal protein, lysine, Nile tilapia, shrimp head meal, smallholdings.
 
Agrovoc terms:
clarias macrocephalus, freshwater catfish, amino acids, cassava feeds, viet nam
 
ISBN: 978-91-576-7517-0
Series.: Acta Universitatis agriculturae Sueciae
ISSN: 1652-6880
Volume: 2010:72
Papers/manuscripts:
I. Nguyen Duy Quynh Tram, Le Duc Ngoan, Le Thanh Hung, Ogle, B. and Lindberg, J. E. (2010). Feeding and production of fresh water fish in smallholdings in Central Vietnam. (Submitted).
 
II. Nguyen Duy Quynh Tram, Le Duc Ngoan, Le Thanh Hung, Lindberg, J.E. (2010). A comparative study on the apparent digestibility of selected feedstuffs in hybrid catfish (Clarias macrocephalus x C. gariepinus)and Nile tilapia (Oreochromis niloticus). Aquaculture Nutrition (doi:
 10.1111/j.1365-2095.2010.00813.x).
 
III. Nguyen Duy Quynh Tram, Le Duc Ngoan, Lindberg, J. E. (2010).Dietary amino acid requirements of fingerling hybrid catfish (Clarias macrocephalus x C. gariepinus). (Submitted).
 
IV Nguyen Duy Quynh Tram, Le Duc Ngoan, Lindberg, J. E. (2010).Influence of partial replacement of fish meal with shrimp head meal or cassava leaf meal, without or with lysine supplementation, on growth performance of hybrid catfish (Clarias macrocephalus x C. gariepinus)
 (manuscript).
 
Number of pages: 59
Year of publication: 2010
Language: eng
ID Code: 2366
Deposited By: Nguyen Duy Quynh, Tram
Deposited On: 15 October 2010

MeKarn PhD Graduation

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Le Van An, Hue University of Agriculture and Fores Sweet potato leaves for growing pigs: biomass yield, digestion and nutritive value
Nguyen Thi Kim Dong: Can Tho University Studies on the utilization of agro-industrial by-products as protein sources for ducks in the Mekong Delta of Vietnam
Do Viet Minh Effect of supplementation of scavenging chickens on feed and nutrient intake, digestibility and performance of local and improved breeds in Vietnam
Khieu Borin Cassava foliage for monogastric animals; forage yield, digestion, influence on gut development and nutritive value
Duong Nguyen Khang Cassava leaf as a protein source for cattle in Vietnam
Do Thi Thanh Van Some animal and feed factors affecting feed intake, behaviour and performance of small ruminants
Vanthong Phengvichith Feeding and forage management systems for smallholder goat productionImproving feed intake of sugarcane and foliage in small ruminants: effect of processing and method of presentation of the feed
Ninh Thi Len Evaluation of high fibre feeds for growing pigs in Vietnam
Nguyen Quang Thieu Evaluation of mycotoxin contamination in Vietnam
Tran Thi Thu Hong Dietary modulation of gut microflora to improve pig health and food safety
Seng Sokerya Effects of cassava foliage on nematode infestation in goats in Cambodia
Huang Huong Giang: Probiotics for Piglets: Effects of probiotics on growth rate, digestibility, health status and features of intestinal microflora of exotic piglets post-weaning under the conditions of Northern Vietnam
Nguyen Thi Thuy Evaluation of Catfish by-product as a protein source for pigs in the Mekong Delta of Vietnam
Chu Manh Thang: Beef production based on cassava products and legume foliage in Vietnam
Nguyen Duy Quynh Tram Evaluation of locally available feed resources for small-scale freshwater fish production in Central Vietnam
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Total records: 29