The aim of the study is to examine the performance and carcass characteristics and some behavioral parameters of geese reared in the areas created by using some objects for environmental enrichment (EE) purpose. For this purpose, a total of 72 one-day-old goose goslings of both sexes were used. Geese were accommodated collectively for the first four weeks, then they were divided in three groups in 3 repetitions according to the EE applications and these were expressed as control (C), broom (B), and mirror (M). At the end of 14th week, live weight (LW), beak length (BL), wing length (WL), head diameter (HD), foot width (FW), body temperature (BT), warm carcass (WC), and cold carcass (CC) weights as well as warm and cold pH values (WpH&CpH), and tonic immobility duration (TID) of the groups were measured. Responses presented during the TI test were expressed as non-responses (NR), medium responses (MR), and high responses (HR). Among the groups, group M had the lowest value (110.08±10.69 s) in terms of TID (P > 0.05). Differences in terms of NR, MR, and HR were significant (P > 0.05). The differences between the groups were not statistically significant in terms of the other characteristics (P < 0.05). As a result, it was determined that geese reared by using the EE objects were affected by such environments, however, there were differences between the groups in terms of fear and stress parameters without having any negative effects on yield.
The aim ofthe present study is to determine the time-dependent changes in the live weights of the geese, for which environmental enrichment was applied (Turkish local goose genotype), between the days 7 and 98. For this purpose, nonlinear Brody, Gompertz, Logistic, von Bertalanffy, and Richards growth models, which are used commonly, were used to determine the growth and development of poultry. Geese were divided into 3 groups (control group (C), broom group (B), mirror group (M)) based on their enrichment characteristics. The success status of the models applied in the present study was assessed based on error mean square (EMS) and coefficient of determination (R2) values. It was found thatR2 value was be 96.86 in the Logistic model, 96.82 in Brody model, 96.16 in vonBertalanffy model,95.04 in Gompertz model and 93.85 in Richards model, respectively, and EMS value was 0.2368 in Logistic model, 0.2004in Brody model, 0.1992 in von Bertalanffy model, 0.3567 in Gompertz model and 0.3711 in Richards model, respectively. As a result, it was concluded that the most suitable models with high coefficient of determination but low error mean square were Brody,Gompertz, and von Bertalanffy models, respectively, in determining the time-dependent live weight change in the geese (Turkish local goose genotype), for which environmental enrichment was applied, and it was suitable to use these three models in determining the effect of environmental enrichment on live weight.
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