Andres Blacksmith, Juliana Meron, Priscila Alcantra, Simone Thomazini.graduandos in medicine veterinary medicine 7 period. INCIDENCE OF LIGHT IN the FARM the light represents one of on factors to the nature, responsible for the control of biorritmo of the birds. Thus, phenomena as migration time of reproduction and change of penalty consist factors related with the light presence. The manipulation in fotoperiodo, in position and cut birds is one of the most powerful tools of available handling to the producer avcula. (QUINTO LANA, GERALDO ROBERT. Poultry keeping 2ooo) the frequency of the ovulao is determined basically by two factors, genetic and the exposition of the birds the natural or artificial illumination. The genetic factors are intrinsic of each ancestry, already the illumination factors can be adjusted and be adapted to get the maximum of productivity of the lots.

The light has fort influences in the hormonal production of the reproductive agencies of the birds. The light penetrates in the ocular globe and stimulates hipfise to produce responsible hormones for the reproductive process (foliculoestimulante Hormone – FSH and Luteinizante Hormone – LH). (Padovan Adilson) the beginning of the position can in advance or be delayed; the position tax can be influenced and its modified interval; s quality of the rind can be improved; the size of the egg can be optimized; penalty and the alimentary efficiency can be maximized by the appropriate supply of a luminous regimen. However, an excellent project of fotoestimulao, for universal application, cannot be defined, because some parameters of production that are influenced by fotoperiodo, as so great of and I number of eggs, are correlated of negative form. The producer will have to choose the fotoperidico project that will go to optimize its profits. (QUINTO LANA, GERALDO ROBERT. Poultry keeping 2ooo.) The females need one fotoperiodo short in the phase of growth, followed of one fotoperiodo long in the reproduction phase.