Nutrition and reproduction in the domestic fowl.

نویسنده

  • L G CHUBB
چکیده

In the domestic fowl (Gallus domesticus) the fertilized egg in the infundibulum of the oviduct consists of an enormous mass of yolk about 40 mm in diameter on which rests the blastodisc about 3 mm in length. The whole is enclosed by a vitelline membrane, but as the egg passes down the oviduct (a process requiring about 24 h) albumen is deposited around it, shell membranes are laid down enclosing the albumen and, finally, calcium salts are deposited on them. This macrolecithal egg provides a readily assimilable food supply for the extremely rapid extragenital development of the embryo. If certain nutrients are lacking or are present in insufficient amounts, death or morphological abnormalities may occur. Several excellent reviews have been published on both the qualitative and quantitative nutritional requirements of breeding fowls for the maintenance of a high reproductive performance (Cruickshank, 1940-1 ; Taylor, 1949 ; Landauer, 195 I ; Bolton, 1958) and I therefore propose to discuss some of the effects of individual nutritional deficiencies on embryonic development, with special emphasis on the age at death of the embryo and the occurrence of specific abnormalities.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Esophagotomy in a domestic fowl: a rare case report

Background: Foreign body in esophagus in birds is rarely reported in literature. Most common site of foreign body in birds is proventriculus and ventriculus. The purpose of this study is to discuss the diagnosis of a large sharp foreign body in the distal third of the neck by plain radiography and its retrieval through esophagotomy and subsequent survival of the fowl. C...

متن کامل

Differential effects of T4 and T3 on TRH- and GRF-induced GH secretion in the domestic fowl.

The in vivo growth hormone (GH) response of immature domestic fowl to thyrotrophin-releasing hormone (TRH) and GH-releasing factor (GRF) was suppressed in birds fed diets supplemented (1 ppm) with triiodothyronine (T3) or given bolus intraperitoneal (ip) injections (100 micrograms/kg for 10 d) of T3. Supplementation (ppm) of the diet with T4 had no effect on secretagogue- induced GH release. Ex...

متن کامل

Reproductive Performance of Domestic Fowl Maintained under Continuous Light.

When domestic fowl were maintained under constant incandescent illumination from time of hatching, the rate of egg production was similar to that of control birds on a diurnal schedule. Hatchability offertile eggs produced by such hens was found to be unaffected by lighting treatment of the parents. Fertility was, however, markedly impaired in the males reared under continuous light. Artificial...

متن کامل

Effects of Marks on Aggression and Stress in the Domestic Fowl (gallus Gallus Domesticus)

Title Thesis: EFFECTS OF MARKS ON AGGRESSION AND STRESS IN THE DOMESTIC FOWL (GALLUS GALLUS DOMESTICUS) Rachel Lynn Dennis, Master of Science, 2004 Thesis Directed By: Associate Professor, Dr. Inmaculada Estevez, Department of Animal and Avian Sciences Animals are marked for identification in a range of experiments from behavior and wildlife management, to reproduction and pharmacological studi...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • The Proceedings of the Nutrition Society

دوره 19  شماره 

صفحات  -

تاریخ انتشار 1960