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Evaluation of catfish by-products as protein sources for pigs in the Mekong Delta of Viet Nam

Thuy, Nguyen Thi (2010). Evaluation of catfish by-products as protein sources for pigs in the Mekong Delta of Viet Nam. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae, 1652-6880 ; 2010:69
ISBN 978-91-576-7514-9
[Doctoral thesis]

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Abstract

The aim of this study was to evaluate preservation methods of catfish by-products (CBP), and the effects of replacing marine fish meal (FM) with these processing byproducts on diet digestibility, performance, feed efficiency and carcass quality in growing-finishing pigs. Paper I presents data on catfish production, processing and the nutritive value of catfish by-product meals (CBM) in the Mekong Delta (MD) of Vietnam. In Paper II, CBP silage made with 20-40% addition of sugar cane molasses (M) was of a better quality than when made with rice bran (RB) at the same levels. The optimum proportion for successful silages with M was 8:2, and with RB 7:3 (CBP and M or RB, fresh weight basis). The total tract apparent digestibility (CTTAD) of CP in CBP ensiled with RB or M was comparable to that of FM, but ether extract (EE) digestibility in ensiled CBP was higher. However, N utilization was not significantly different among FM and silage diets. In Paper III, the coefficient of ileal apparent digestibility (CIAD) of CP in CBP ensiled with M (ECM) tended to be higher than that in CBM, processing waste water (WWB) and FM. However, the CIAD and CTTAD of EE in FM were lower than in CBP. Amino acid digestibility and nitrogen retention were not affected by replacement of FM. Results from Paper IV showed that, the higher the inclusion level of WWB as replacement for FM in the diet, the lower the average daily feed intake (ADFI), amino acid intake and average daily gain (ADG).However, feed conversion ratio (FCR) was improved, and the feed cost was reduced to 68% of that of the FM diet. In Paper V, a higher inclusion level of ECM as replacement for FM in the diet resulted in slightly lower ADFI, but increased ADG. As a result, FCR was improved and feed cost of the diet with 100% CP coming from ECM reduced to 72% of the cost of the diet with 100 % of the CP from FM. Carcass yield and dressing percentage were not affected by ECM replacement, but leaf fat and back fat thickness were higher with higher ECM replacement of FM. There was no effect on DM and CP contents in Longissimus dorsi muscle, but EE and polyunsaturated fatty acid contents increased especially eicosenoic, linolenic, linoleic, DHA and DPA. Meat colour values also increased with increasing ECM replacement level.

Authors/Creators:Thuy, Nguyen Thi
Title:Evaluation of catfish by-products as protein sources for pigs in the Mekong Delta of Viet Nam
Year of publishing :2010
Volume:2010:69
Number of Pages:62
Papers/manuscripts:
NumberReferences
ALLI. Thuy, N. T., Lindberg, J. E. and Ogle, B. 2007. Survey of the production, processing and nutritive values of catfish by-product meals in the Mekong Delta of Vietnam. Livestock Research for Rural Development, 19 (9). II Thuy, N. T., Lindberg, J. E. and Ogle, B. 2010. Effect of additive on the chemical composition of Tra catfish (Pangasius hypophthalmus) by-product silages and their nutritive value for pigs. Asian-Australasian Journal of Animal Science, 23 (6), 761-771. III Thuy, N. T., Lindberg, J. E. and Ogle, B. 2010. Digestibility and nitrogen balance of diets that include marine fish meal, catfish (Pangasius hypophthalmus) by-product meal and silage, and processing waste water in growing pigs. Asian-Australasian Journal of Animal Science, 23(7), 924-930. IV Thuy, N. T., Lindberg, J. E. and Ogle, B. 2010.Effects of replacing fish meal with catfish (Pangasius hypophthalmus) processing waste water on the performance of growing pigs. Tropical Animal Health and Production (In press). V Thuy, N. T., Lindberg, J. E. and Ogle, B. 2010. Effects of replacing fish meal with ensiled catfish (Pangasius hypophthalmus) by-products on the performance and carcass quality of finishing pigs (Submitted).
Place of Publication:Uppsala
ISBN for printed version:978-91-576-7514-9
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agrovoc terms:sea catfish, swine, feeds, evaluation, viet nam
Keywords:Catfish by-products, carcass traits, growing pigs, ileal and total tract digestibility, Mekong Delta, Vietnam, silage, waste water by-products
URN:NBN:urn:nbn:se:slu:epsilon-3108
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-3108
ID Code:2370
Department:(VH) > Dept. of Animal Nutrition and Management
Deposited By: THUY NGUYEN THI
Deposited On:19 Oct 2010 00:00
Metadata Last Modified:02 Dec 2014 10:17

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