The present study was aimed at the comparison of floor-based growth (FBG) and caged-based growth (CBG) systems in broiler production for growth performance and parameters related to slaughter, carcass and meat quality. Ninety one-day-old male Ross-308 chicks constituted the material of the study. It was determined that, in Groups FBG and CBG, the differences between body weight and cumulative body weight values were statistically very significant (P<0.01). The final body weights measured at the end of the trial and the mean body weight gain values in Groups FBG and CBG were determined as 2530 g -2046 g and 2389.16 g -1904.77 g, respectively. The end-trial final feed conversion rates of Groups FBG and CBG were determined as 1.82 and 1.88, respectively, and it was ascertained that the difference between the values of the two groups was statistically insignificant (P>0.05). While the hot and cold dressing percentages and the neck, wing, drumstick and tail percentages did not statistically differ between Groups FBG and CBG (P>0.05), values pertaining to breast meat displayed significant differences (P<0.05). It was determined that the L*, b* and C* values pertaining to breast meat and the L*, a*, b* and C* values pertaining to chicken drumsticks displayed statistically significant differences (P<0.05, P<0.01) between the trial groups. Keywords: Broiler, Floor-based breeding, Caged-based breeding, Carcass, Meat quality Farklı Yetiştirme Metotlarının Etlik Piliçlerde Besi Performansı, Kesim ve Karkas Özellikleri İle Bazı Et Kalite Parametreleri Üzerine Etkisi ÖzetBu araştırma altlıklı yer sistemi (FBG) ve kafeste (CBG) yapılan etlik piliç yetiştiriciliğinin besi performansı, kesim, karkas ve bazı karkas kalite parametrelerinin karşılaştırılması amacıyla yürütülmüştür. Hayvan materyali olarak 90 adet bir günlük Ross-308 erkek broyler civciv kullanılmıştır. FBG ve CBG gruplarında canlı ağırlık ve kümülatif canlı ağırlık değerleri arasındaki farklılığın istatistiksel olarak çok önemli (P<0.01) olduğu saptanmıştır. Deneme sonu canlı ağırlık değerleri ile ortalama canlı ağırlık artışları FBG ve CBG gruplarında sarasıyla 2530 ve 2046 g ile 2389.16 ve 1904.77 g olarak tespit edilmiştir. Deneme sonu kümülatif yemden yararlanma değerleri FBG ve CBG gruplarında sırayla 1.82 ve 1.88 olarak bulunmuş ve aralarındaki farklılığın istatistiksel olarak önemsiz (P>0.05) olduğu tespit edilmiştir. FBG ve CBG gruplarında sıcak ve soğuk karkas randımanı ile boyun, kanat, but ve kuyruk oranlarına ait değerler arasında istatistiksel olarak farklılığın olmadığı (P>0.05), göğüs oranına ait değerler bakımından ise önemli (P<0.05) farklılıkların olduğu belirlenmiştir. Göğüs etinden elde edilen L*, b* ve C* değerlerinin ve but etinden elde edilen L*, a*, b* ve C* değerleri bakımından deneme grupları arasında önemli farklılıkların olduğu (P<0.05, P<0.01) tespit edilmiştir.

The present study aimed to determine the effects of different storage materials and storage period on some hatchability traits of Japanese quail (Coturnix coturnix japonica) eggs. A total of 32 male and 102 female quail (twelve weeks of ages) were housed in multiple-bird cages. Eggs laid were divided into three groups with respect to the period of storage (I = 1 st , 2 nd and 3 rd days, II = 6 th , 7 th and 8 th days, III = 12 th , 13 th and 14 th days) prior to incubation. A total of 816 eggs was stored in 3 different storage environments during each storage period (B = no use of any storage material, P = use of perlite, H = use of hay) and kept in environmental conditions, where the temperature was 21°C and relative humidity was 75%, prior to incubation. Statistical analyses were performed after the exclusion of values pertaining to non-fertile eggs (190 eggs) from the data set. The fertility rate of the eggs in the experiment was 76.7%. In the present study, the influence of storage material and different storage periods on egg weight loss were found to be statistically significant (p<0.01). Upon the comparison of hatchability of fertile eggs values, the influence of storage material was determined to be significant (p<0.05), and the influence of storage period was demonstrated to be significant (p<0.01). The storage materials used were determined not to have any influence on early and late embryonic death rates. Perlite was concluded to be safe for use in the storage of hatching eggs. The extension of the storage period (more than 8 days) resulted in decreased hatchability values of fertile eggs in each group.

The objective of this study was to examine the effect of pre-slaughter environment on physiology and meat quality in New Zealand rabbits. Pre-slaughter environment consisted of combined effects of social and non-social factors. For the experiment, 18 male New Zealand rabbits (Oryctolagus cuniculus), 3 months of age, were used. Some biochemical and meat quality parameters of the animals were measured, and the results were compared with the control group. The pre-slaughter environment significantly influenced some biochemical and meat quality parameters (P < 0.01 and P < 0.05, respectively). It is concluded that pre-slaughter environment negatively affected the welfare status and decreased the meat quality in New Zealand rabbits.

The weekly liveweight gain, growing and stress parameters of quails bred using two different types of lighting for 6 weeks following hatching were examined in this study. The first type of lighting was 23 L:1 D, continuous lighting (CL), widely used in the commercial system and the second was a self-photoperiod (SP) system consisting of a continuously lit chamber and a dark chamber the quails could move to as they wished. On the first 15 days, no difference was found in liveweight gain between the two breeding systems. On the 6 th week when the trial was completed, the liveweight of the male quails upon which CL lighting was used was 159.03 g while the weight of males in the SP group was 174.43 g; these values in female quails of the CL group were 179.15 g and in the SP group were 200.68 g. The CL group had lower testis volume (TVOM, cm 3 ) and testis weight (TW, g) than the SP group, however there was no difference between the groups in testis weight/body weight rate (BWTW %). In female quails, the ovary weight (OW, g) and the ovary weight/body weight rate (BWOW, %) values were higher in the SP group. The CL light regime was concluded to cause stress in male quails (CL, Heterophil/Lymphocyte ratio (H/L): 0.27; SP, H/L: 0.17). In conclusion; the SP system allowing the quails to regulate their light periods increased liveweight gain and enabled sexual maturity to be gained at an earlier period than in quail on the CL system and improved their welfare.

This study was conducted to assess the effects of various stunning methods on meat quality traits of Salmo trutta fario. A total of seventy five fish (1 year old, female/male) were exposed to one of the five stunning procedure: iced water, electrical shock, carbondioxide (CO 2) saturated water, percussive stunning and asphyxia. Highest initial fillet pH was measured in CO 2 group's meat on the first day of the trial and the lowest initial pH was belonged to asphyxia, but the difference among groups was not statistically significant (p>0.05). Significant relation was determined between pH and storage period of the fillets (p<0.01). No significant relation was obtained between killing methods and L* value of the meat. Killing method and storage period did not affect the water holding capacity and pH of the fillets. However; carbondioxide was thought to be the best method for better total volatile base nitrogen (TVBN) values; for better thiobarbituric acid-reactive substances (TBARS) of the meat, iced water method should be preferred.