Digestibility of dietary components and amino acids in animal and plant protein feed ingredients in striped catfish (Pangasianodon hypophthalmus) fingerlings

Abstract

The apparent digestibility (AD) of dietary components, energy and essential amino acids (EAA) of selected locally available animal and plant protein feed ingredients in striped catfish (Pangasianodon hypophthalmus) fingerlings was studied. The AD of the test ingredients (ADi) differed (P < 0.05) and ranged from 81.1% to 90.8%, for ADi DM , from 84.0% to 95.0% for ADi CP , from 78.4% to 86.9% for ADi OM and from 79.0% to 87.8% for ADi GE . The highest ADi DM , ADi CP and ADi OM in the test ingredients were found for shrimp head meal, catfish by-product meal, golden apple snail and groundnut cake, while the lowest values were obtained for earthworm meal and rice bran. The highest ADi GE was found in rice bran, followed by golden apple snail and catfish by-product meal, while there were no differences (P < 0.05) between the other test ingredients, except for earthworm meal. The AD of total and individual EAA was high in catfish by-product meal and shrimp head meal, followed by decreasing AD in golden apple snail, groundnut cake, rice bran and earthworm meal ingredients (P < 0.05). The low AD of earthworm meal may limit its potential to be used as replacement for fish meal in the feed.

Measurement of digestibility in agastric fish based on stripping method - apparent nutrient, energy and amino acid digestibilities of common feed ingredients for carp diets (Cyprinus carpio)

“…In a study from Glencross et al (2008), a highly significant relationship between digestibility coefficients of protein and sum of AAs in diets was found (R = 0.8678, P = 0.001). Notwithstanding, our determined digestibilities of individual AAs varied and did not reflect ADI CP as also reported by Da et al (2013), Suarez et al (2013) and Zhang et al (2015) in studies with catfish, cobia (Rachycentron canadum) and bullfrog (Rana (Lithobates) catesbeiana). To our knowledge, the reasons for these intravariations of ADI TAA seem to be still unclear and should be suggested as topic of future research, as also mentioned by Yamamoto et al (1997).…”

“…Notwithstanding, our determined digestibilities of individual AAs varied and did not reflect ADI CP as also reported by Da et al . (), Suarez et al . () and Zhang et al .…”

“…As nutrient digestibility is believed as main influencing dietary utilization factor in animal nutrition, studies about apparent digestibilities of various feed ingredients in different fish species have received much attention in recent years. Digestibility trials for various feed ingredients were conducted with tilapia (Oreochromis aureus/niloticus), Senegalese sole (Solea senegalensis), red drum (Sciaenops ocellatus), largemouth bass (Micropterus salmoides), channel catfish (Ictalurus punctatus) or rainbow trout (Oncorhynchus mykiss) as some examples of many (Masagounder et al 2009;Dias et al 2010;Hussain et al 2011;Da et al 2013;Bowzer et al 2015;Do Carmo Gominho-Rosa et al 2015). Nutrient and energy digestibilities rather than chemical compositions of ingredients generate obligatory knowledge for modern feed production, which is still limiting for the growing variety of feed sources utilized in aquafeeds (NRC 2011).…”

Effect of different sources and forms of dietary carbohydrates on growth performance, body indices and lipogenesis activity of striped catfish Pangasianodon hypophthalmus fingerlings

“…Pangasianodon hypophthalmus (Siluriformes, Pangasiidae; formerly known as Pangasius hypophthalmus ) (Sauvage, 1878) is an omnivorous freshwater fish (Da, Lundh, & Lindberg, ) that originated in the Mekong and Tchao Phraya River basins (Slembrouck, Baras, Subagja, Hung, & Legendre, ). To date, Vietnam is the world's largest producer of P. hypophthalmus .…”

Factors affecting the quantity and quality of faecal waste in striped catfish

“…In the first approach, the amount of faecal waste can be reduced by improving feed digestibility. So far, few studies are available on the digestibility of feed for striped catfish (Hien et al, 2010;Da et al, 2013) and even few studies address the waste management in striped catfish. Improving feed digestibility may imply that feeds will cost more money (Ngoc, 2016).…”