2013 Cilt 27 Sayı 2

Permanent URI for this collectionhttps://hdl.handle.net/11452/2174

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Browsing by BUU Author "Sözcü, Arda"

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    Broiler chick quality and scoring methods
    (Uludağ Üniversitesi, 2013-11-28) İpek, Aydın; Sözcü, Arda; Ziraat Fakültesi; Zootekni Bölümü
    The day old chick quality has a great importance for hatcheries and also broiler producers. It is an indicator of hatchery success and assurance of broiler productivity. Chick quality is affected by a number of factors from the time of fertilization to placement time at broiler houses. Generally, these factors are classified as pre-incubation and incibation factors. These factors affects embryo development and chick quality, and in this way post-hatch broiler performance. Day old chick quality is assessed by considering some parameters as colour, vitality, navel quality, yolk uptake, leg confirmation, well formed beak, chick hatching weight, yolk free body weight and chick length. While some of these parameters are qualitative, others are quantitative characteristics of chicks. Because of assessing of qualitative parameters, some scoring systems have been developed to convert these factors into a quantitative score. Fort his reason, visual scoring, Tona or Pasgar score, day old chick weight, yolk free body weight and chick length are used largely for measurement chick quality. In this review, definition of the day old chick quality, effecting factors and also scoring methods are explained.
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    Incubation conditions affect chick quality and broiler performance
    (Uludağ Üniversitesi, 2013-11-28) Sözcü, Arda; Aydın, İpek; Ziraat Fakültesi; Zootekni Bölümü
    Chick quality has gained increasingly more importance for profitable production because of pervading broiler production around the world. There is a critical relationship between the day old chick quality and posthatch broiler performance. The chick quality is affected by incubation conditions during embryonic development stage and after hatching it reflects significantly subsequent performance during rearing period. To estimate of hatchery success, good quality saleable chick percentage is more important than hatchability. Because they are paid based on chick sales. Incubation conditions such as temperature, humidity, ventilation and turning should be provided as optimum standards to meet embryo requirements during development stage. All of these conditions influence embryonic development, chick hatching weight and in this way posthatch growth performance. Recently, some researchers have showed that especially incubation temperature is the most critical factor affecting hatchability, hatchling quality and also subsequent performance. In this review, about temperature, relative humidity, ventilation and turning requirements of embryos during incubation period and their effects on chick quality and broiler performance are discussed.