Fish meal replacement by plant and animal by-products in diets for the Australian short-finned eel, Anguilla australis australis (Richardson)

Abstract

In this experiment, 23% of fish meal protein was replaced with protein from Australian soybean meal (SBM), lupin meal (LM), corn gluten meal (CGM) and meat meal (MM) in nutritionally balanced experimental diets. Growth and growth efficiencies of juvenile Australian short‐finned eel Anguilla australis australis (Richardson) elvers (2.23±0.4‐g average wet weight) were compared. Elvers were fed twice a day to a total of 5% body weight per day for 63 days. Total weight gain (g), specific growth rate (% day−1), protein efficiency ratio (%) and productive protein value (%) were significantly higher (P<0.05) for elvers fed the MM diet than for those fed the LM diet. There were no differences in diurnal ammonia‐nitrogen excretion rates. However, diurnal urea‐nitrogen excretion rates were significantly (P<0.05) affected by diet and rates were two to three times higher for all diets, except CGM, 4 h following the afternoon feed. Diet significantly affected apparent digestibility (AD); ADs of protein for SBM and LM were significantly (P<0.001) higher than for control diet, CGM and MM; AD of energy for LM was significantly (P<0.05) lower than for all the other diets. Fish meal protein was replaced by CGM, SBM and MM without compromising growth rates of the Australian short‐finned eel. However, whole lupin seed meal (LM) depressed growth and growth efficiencies most likely because of the high indigestible carbohydrate content.

Hybrid sturgeon ‘AL’ (Acipenser naccarii×Acipenser baeri) diets: the use of alternative plant protein sources

“…The high substitution utilized provides a clear indication of CG in comparison with other plant proteins as PM. These results with PM are in agreement with several others obtained with turbot, rainbow trout and Australian eel (Burel, Boujard, Kaushik, Boeuf, Van Der Geyten, Mol, Kühn, Quinsac, Krouti & Ribailler 2000; Engin & Carter 2002), but are in contrast with other experiments in tilapia and milkfish (Santiago & Lovell 1988; Borlongan, Eusebio & Welsh 2002). This result is probably related to the different physiology of sturgeon (primitive fish) compared with other farmed finfish or from different strains of pea utilized in far eastern countries.…”

Clustering of ingredients with amino acid composition similar to the nutritional requirement of Nile tilapia

“…amino acids profile and availability, will determine the efficiency of nitrogen deposition on carcass (Engin and Carter, 2005), and as a consequence, the economics of diets and production. To date, only a few feedstuffs were appraised in regard to availability of their amino acids contents for tilapia (Fagbenro, 1998;Köprücü and Özdemir, 2005;Furuya et al, 2001 a;Henry-Silva et al, 2006;Guimarães et al, 2008 a, b).…”

Modification in Body Fat Content and Fatty Acid Profile of Wild Yellow Shortfin Eel, Anguilla australis, through Short‐term Fattening

“…Several studies have been conducted on the culture of the glass eel and elver stages of the shortfin eel life cycle (De Silva et al 2001a, 2001b; Ingram et al 2001; Gooley and Ingram, 2002; Engin and Carter 2002; Gunasekera et al 2002; Engin and Carter 2005, 2006; Kearney 2009, among others). By contrast, studies on culturing or fattening of the yellow stage of this species are limited.…”