Records on 514 bulls from the sire population born from 1978 to 2004, and on 22,099 of their field progeny born from 1997 to 2003 with available pedigree information (total number = 124,458) were used to estimate genetic parameters for feed intake and energy efficiency traits of bulls and their relationships with carcass traits of field progeny. Feed intake and energetic efficiency traits were ...

Defatted microalgal biomass derived from biorefinery can be potential feed ingredients for carnivorous fish. The present study investigated the growth, feed intake:gain and health parameters in Atlantic salmon fed for 84 days with defatted Nannochloropsis oceania as a fishmeal replacer. Fish fed feeds containing the algal biomass (at 10 and 20% inclusion, alga groups) were compared with groups ...

this experiment was conducted to evaluate the effect of spirulina pletensis powder on the growth performances (final weight (fw), daily growth ratio (dgr), feed indices (feed conversion rate (fcr), voluntary feed intake (vfi), protein efficiency ratio (per), protein produce value (ppv), body chemical (protein, fat, moisture and ash) and fatty acid composition of mugil cephalus for 62 days. the ...

Effect of vitamin A deficiency was determined on the immune response of broilers. The experimental feed was prepared having vitamin A level at the rate of 500 IU/kg of feed. Vitamin A deficiency in feed significantly lowered (P<0.05) the gain in body weight with poor feed conversion ratio (FCR). In Newcastle disease virus (NDV) infected broilers kept on vitamin A deficiency showed greenish whit...

Current selection goals in broiler breeding focus on the improvement of live performance traits, such as feed intake, BW, and feed conversion ratio (FCR). The use of electronic feeders allows measurement of feed intake of individuals housed in groups as well as the identification of different feeding behaviors. Feed intake can thus be split into underlying feeding behavior traits, allowing the ...

Growth, feed conversion ratio and fillet composition of rainbow trout (initial weight of 9.99&plusmn;0.109)were investigated in a 6x2 factorial design experiment employing two levels of digestible energy (DE) (2900 and 3500kcal.kg-1) and six feeding rates (1.0%, 2.0%, 3.0%, 4.0%,5.0% of the body weight,(BW) day-1 and to satiation) for 60 days. Specific growth rate (SGR) was highest at 5.0% rati...

The study examined the growth performance of pigs offered liquid feed or dry feed on either a restricted or an ad libitum basis, and whether their growth performance was further influenced by the water-to-feed ratio. The study was split into two parts to enable unrestricted (trial 1; n = 64) and restricted (trial 2; n = 48) feeding to be compared. Male pigs were randomly allocated to six dietar...

Feed conversion efficiency is a measure of how well an animal converts feed into live weight and it is typically expressed as feed conversion ratio (FCR). FCR and related traits like growth rate (e.g. days to 110 kg-D110) are of high interest for animal breeders, farmers and society due to implications on animal performance, feeding costs and environmental sustainability. The objective of this ...

This study was aimed to evaluate the efficiency of three experimental feeds, given to three groups of rohu (Labeo rohita) fingerlings, reared in cemented tanks for 45 days. One group of fishes (control group) was fed with hatchery feed; and growth of this group was compared with the other experimental groups. In all the three experimental groups the protein level was kept below the required lev...

Laying records on 1,534 F2 hens, derived from a reciprocal cross between White Leghorns and Dongxiang blue-shelled chickens, were used to estimate genetic parameters for residual feed intake (RFI), feed conversion ratio (FCR), daily feed intake (FI), metabolic BW (MBW), BW gain (BWG), and daily egg mass (EM) at 37 to 40 (T1) and 57 to 60 wk age (T2), respectively. Genetic analysis was subsequen...