Afsin Kocakaya

Ankara University · Department of Animal Husbandry (Faculty of Veterinary Medicine)

In order to rapid genetic improvement in dairy cattle, generation interval should be as short as possible. Because of the long generation interval, in generally using improvement methods have lower rate of genetic improvement. Through genomic evaluation method, generation interval could be shorter. In terms of some quantitative characteristic of ca...

Investigation of Some Reproductive Characteristics and Progesterone Levels of Akkaraman Sheep

Concerns have been increasing about conventional cages for laying hens in connection with welfare. Liver and bone disorders of laying hens are major problems. Therefore, the aim of this experiment was to investigate the differences in liver and bone traits of two laying strains kept in conventional and enriched cages. A total of 532 two Lohmann Bro...

The aim of this study was to determine the effects of width and depth of bell drinker and sex on fattening performance and carcass characteristics of Pekin ducks. A total of sixty male and sixty female ducklings (Star 53 H.Y., Grimaud Freres) were used. Each sex group was randomly allocated into two bell drinker groups (narrow bell drinker with 47...

The aim of this study is to determine effects of brooder machine rearing method in the first week on fattening performance, carcass characteristics, meat quality and some blood parameters of male and female Pekin ducks. A total of 120 (60 male and 60 female) ducklings were used in the research. Each sex group was randomly allocated into two rearing...

This study aimed to assess the genetic diversity, maternal origin, and population structure of Turkish Aseel chickens. The research was conducted on Aseel roosters and chicks older than one year. DNA was extracted from 96 Turkish Aseel feather samples collected from various regions of Türkiye for the study. Sample DNAs were amplified using specific...

Horses, used for various purposes for centuries, are today commonly used for sporting purposes. It is critical to identify the horses that are used in this way by using the coat color and markings on the horse. The animal material for this research consisted of 101 Arabs and 206 Thoroughbreds. The most common coat color was BAY (56.6%). The least c...

Hybrids with different morphological and yield characteristics are used in the table egg production. There is no change in the cage systems according to the different hybrids in the regulation. This study aimed to investigate the effects of genotype (brown laying hybrids (BLH) and white laying hybrids (WLH)) and cage type (conventional and enriched...

The aim of this research was to determine the effects of coating broiler hatching eggs with chitosan on egg quality, embryonic growth, hatching results and chick quality. Eggs obtained from old broiler breeder, aged 59 weeks, were used. Eggs were divided into two groups (coated with chitosan and uncoated) groups. Each group was divided into three g...

As most of the unenriched cages will soon switch to enriched cages, it is important to characterize all the effects in the laying hens for sustainable production. Laying hens can be used in several production periods by applying molting. The aim of this study was to determine the cage type (unenriched and enriched) on performance, welfare, and micr...

In this study, progesterone and estrogen hormone levels of Akkaraman (White Karaman/WK) sheep and their effects on some reproductive traits were investigated. The data obtained, from 31 ewes, as 90.32% for lambing, 53.57% for a single birth, 46.42% for twinning, 132.25% for lamb production and 1.46 for litter size. Between the first and second estr...

Aim of this study was to investigate direct, indirect and total effects of body measurements on live weight in Awassi sheep and to derive prediction equations for estimation of the live weight. Live weight, head length, body length, withers height, chest depth, chest width and rump height measurements of 270 Awassi sheep at the age of 2-4 years rai...

The litter quality is an important factor affecting the performance, welfare and carcass quality of the broilers. Depending on the progress of the fattening duration, some materials may be added to the litter in order to keep the pH, moisture and ammonia levels in the litter under control. Sepiolite is a natural material and it has strong absorbing...

The aim of this study was to investigate the differences in production performance, use of nest box, and external appearance of 2 strains of laying hens kept in conventional and enriched cages. Lohmann Brown Classic (LB, n = 532) and Lohmann LSL Classic (LW, n = 532) hens were housed from 16 to 73 wk in either conventional cages or enriched cages....

The objective of this study was to determine the effect of spraying Pekin duck eggs obtained from different breeder age on hatchability. Hatching eggs used in this study were obtained from Pekin breeder flock. A total of 560 eggs were collected at 30 and 38-wk of breeder age at the farm. Ten eggs from each breeder age group were used to determine e...

The objective of this study was to determine the effects of different levels of Yucca schidigera additions to different litter materials on broiler performance, footpad dermatitis and litter characteristics. A total of five hundred seventy six 1-d-old male broiler chicks (ROSS-308) was randomly assigned to 48 pens. Chicks were randomly allocated to...

This study was aimed at determining the morphological and genetic traits of Malakli{dotless} Karabash dogs in Turkey. Body weight, head and body measurements were taken from eighteen months of age and older, of total 277 dogs (77 female and 200 male). The statistically values (X±SE) on sex groups (female and male, respectively) for body weight (kg)...

This study was carried out to determine the effects of different levels of Yucca schidigera spraying in different litter materials on some litter traits (moisture, pH, ammonia, total colony count, number of Enterobacteriaceae and number of yeast and mold) and breast burn of broilers at the 5th week of production. A total of four hundred thirty two...