A b e r r a n t morpholog ica l forms have been reported for a number of free-living and plant-parasitic nematodes. In some cases aberrancy is genetic (4) and in others it is environmentally induced (5,6). More than 200 mutant genes known to control aberrant phenotypes of Caenorhabclitis elegans (Maupas) Dougherty have been reported (4). Some of these mutants affect collagen synthesis and cutic...

The population of great hornbills (Buceros bicornis) in the United States is rapidly aging, and captive breeding efforts have not met population managers’ expectations for a sustainable captive group. Little is known about the reproductive physiology of these birds. This study reports the first data on the reproductive endocrinology of the great hornbill. The hormone profiles of the only pair o...

background: the specific antibody response against newcastle disease virus (ndv) in the blood serum of chickens hatched from eggs exposed to low dose gamma-radiation was studied. materials and methods: two groups of eggs of commercial meat chicken lines were irradiated with the dose of 0.30 gy 60co gamma-rays before incubation and on the 19th day of incubation, respectively. the same number of ...

Present study was conducted in Bidar district of Karnataka, where 150 eggs were collected from surrounding five different villages. The hatched with 67% hatchability. Chicks reared all standard managemental practices. Twenty healthy female birds plumage colour namely brown, black and yellow tinge selected separated into three pens before the laying stage (at 16th week). first lay observed brown...

A total of 2160 images of candled, incubated ostrich eggs were digitized to determine the percentage of egg volume occupied by the air cell at different stages of incubation. The air cell on average occupied 2.5% of the volume of fresh eggs. For eggs that hatched successfully, this volume increased to an average of 24.4% at 41 days of incubation, just prior to hatching. Air cell volume at 29 da...