background: fasciolosis, caused by the liver flukes of the genus fasciola , is one of the most prevalent diseases of domestic livestock and human throughout the world, imposing considerable economic losses. the present study was aimed to assess the effects of different ph values on hatching rate of fasciola miracidia . methods: the flukes were isolated from the infected livers of the slaughtere...

 Effect of nanosilver particles was studied on the hatchability of rainbow trout (Oncorhynchus mykiss) egg and survival of the produced larvae at about 12ºC. In the first experiment the water-based nanosilver particles was used at concentrations of 0.5, 1, 2 and 4 mgL-1 for 30 minutes per day starting 24 hour post egg incubation until the hatching time. The mean percentage of hatchability reach...

High ambient temperature is a major factor for diminishing reproductive performance of broiler parent stocks. Homozygous naked neck (NaNa) broilers, which possess a higher adaptation to heat due to a reduction of feather coverage, exhibited higher growth rates and meat yield. This study was conducted to investigate the influence of genotype x temperature interactions on the reproduction traits ...

Hatchery efficiency is based on hatchability and the number of salable chicks. The hatchery sector has been seeking new alternatives to optimize production rates, including use different systems (multistage [MS] or single-stage [SS] machines) improve incubation conditions. present study aimed compare results for hatchability, chick quality, broiler performance chicks from 2 incubator systems-MS...

This study aimed to characterize production and reproduction performances in Rhode Island Red-White strain chicken developed and maintained at the Central Avian Research Institute, Izatnagar. Three hundred and forty six fertile eggs were set in automated electric incubation and 234 chicks were investigated in three hatches. The performance data was analyzed by least squares analysis of variance...

The effect of acetylsalicylic acid (ASA) injected in ovo on the 18 d of incubation on the hatchability, course of hatching, and thyroid hormone concentrations (thyroxine (T4) and triiodothyronine (T3)) in the blood of chicks exposed to control (CON) or hyperthermic (HT) conditions during hatching were investigated. Eggs (n=540) from a broiler breeder flock were incubated under standard conditio...

The study was carried out to assess the reproductive abilities of White Plymouth Rock (WPR) and Barred Plymouth Rock (BPR) parent stock (layer breeders) reared under similar housing (deep litter), management and agro-climatic conditions. A total of 1,763,322 and 1,732,966 fertilized eggs were produced by WPR and BPR, respectively, during the observed period which lasted four years (2002-2005). ...

The effects of broiler breeder hen age and dietary n-3 oils on yolk n-3 and n-6 fatty acid composition, egg quality, fertility, and hatchability were investigated. A total of 2,200 eggs were collected from wk 26 through 62 from Cobb breeder hens fed diets containing 1.75% fish oil + 1.75% yellow grease (low n-3) or 3.5% fish oil (high n-3). Eggs obtained from a commercial source were used as th...

the 440 fertile eggs, in a completely randomized design were divided into 11 treatments with four replicatesand 10 eggs per each replicate. treatments including: (t1; control; without injection), (t2; injected with 0.3ml saline 9.0%; sham control), (t3, t4 and t5) 25, 75, 125 ppm fe-nano, (t6, t7 and t8) 50, 100, 150 ppmfe-nano-alimet chelate, (t9, t10 and t11) 50, 100, 150 ppm fe-aliment chela...