10.6084/m9.figshare.5188204.v1
Ingryd Palloma Teodósio da Nóbrega
Ingryd Palloma Teodósio
da Nóbrega
Gustavo André Bernado Moura
Gustavo André Bernado
Moura
Thaysa Rodrigues Torres
Thaysa Rodrigues
Torres
Camila Angélica Gonçalves
Camila Angélica
Gonçalves
Edney Pereira da Silva
Edney Pereira
da Silva
Evaluation of beak trimming methods during rearing phase on commercial lots of laying hens pullets
CBBiomet 2017
2017
beak tretment
growing phase
poultry production
Animal Behaviour
2017-08-07 18:33:41
Journal contribution
https://cbbiomet.figshare.com/articles/journal_contribution/Evaluation_of_beak_trimming_methods_during_rearing_phase_on_commercial_lots_of_laying_hens_pullets/5188204
The aim of this study is to
analyze the coefficients that represent the energy partition ingested by
Japanese quails for maintenance and egg production. A trial will be conducted
to evaluate egg mass (MO) and body weight (PC) responses of Japanese quails
submitted to different metabolizable energy intakes (IEM). It will be utilized
a total of 70 Japanese quails, randomly distributed with seven treatments and
ten replicates, composed of one bird each, for individual control. The trial
will begin at 16 weeks of age and data will be collected for eight weeks. Two
diets will be formulated, one with high energy content (3,600 kcal / kg - N7)
and the other with low energy content (2,100 kcal / kg - N1). Intermediate
levels will be obtained by dilution. The analyzed variables will be IEM, PC and
MO. The models available in the literature that predict IEM based on the
nutritional constants that represent the energy requirement kcal per g of MO
and kcal per kg of PC will be evaluated through the linear decomposition of the
error (observed - predicted), in scalar error and bias of predicted by linear
regression between predicted errors and values. The decision rule will be based
on the impartiality of the model, obtained when the R² approaches 0. If
necessary, parameter adjustments can be made to recommend a model that allows
the user to predict metabolizable energy intake according to the mass
production of eggs and body weight of each farm.