A study on the Eggs Design and you will Top quality Depending on the Age from Five Italian Chicken Twin-Mission Purebred Hens Reared Outside

A study on the Eggs Design and you will Top quality Depending on the Age from Five Italian Chicken Twin-Mission Purebred Hens Reared Outside

The fresh new onset of egg putting to own hens was influenced gorgeousbrides.net prova hГ¤r by genotype, health human anatomy status and you may ecological criteria. Local breeds (light eggshell breeds-Padovana and you can Polverara; tinted eggshell types-Pepoi, Ermellinata di Rovigo, Robusta Maculata and you may Robusta Lionata) on Veneto region, inside the Northern Italy, was indeed reared outdoors away from springtime (six days old; 6 WA) to help you trip and you can wintertime. The new start of laying varied with respect to the breed (22–28 WA): precisely the shaded eggshell breeds been putting after summer/start of fall, throughout the presence away from a lessening sheer photoperiod, as well as the eggs development survived for almost all weeks. During the 38 WA, fake light are gradually put into new photoperiod to obtain 14L:10D, and at 42 WA, the half a dozen types have been installing. Getting hens reared external, affairs certainly one of environment, human body time and you can health criteria is highly recommended. The information on the energetic yield and you may eggs quality of the newest regional reproduce hens are useful to the handling of the birds and for an acceptable source of egg, both for market and also for brooding throughout the year.

Conceptual

The month of hatching and the rearing management, especially temperature and photoperiod, are important factors for pullets and hens reared outdoors. The yield performance and egg quality of dual-purpose chicken breeds from the Veneto region (Italy), Pepoi (PP), Ermellinata di Rovigo (ER), Robusta Maculata (RM) and Robusta Lionata (RL), with different adult body weights (ABW, kg, PP = 1.3; ER = 2.3, RM and RL = 3.1), were studied, using a factorial model (4 ? 2), considering breed and age (26–33 weeks, first age, summer–autumn, under decreasing natural photoperiod-on average, 12L:12D, and 42–53 weeks, second age, winter, under implemented photoperiod-14L:10D) as the main effects and interaction. The chicks hatched in spring, and they started laying at the end of summer/beginning of autumn. Significant ( p < 0.05)>

step one. Addition

Over the last few many years, demand for twin-goal poultry types might have been broadening, for biodiversity and you will ethical concerns. Given the improvements inside hereditary improvements to possess produce results for the hybrid hens done by a few breeding companies all around the world , biodiversity is now one of several secret values out-of sustainability getting as well as farming . The latest moral impact on creature hobbies are a much deeper important question, hence considers not simply the fresh new rearing criteria of your wild birds but also its government. The newest men away from eggs level hybrids was slain immediately following hatching, because they do not perform some standard gains and you will slaughtering quality questioned towards the markets . Additionally, hybrid broilers inform you of a lot bodily trouble, that don’t let them enjoys sufficient well-becoming standards, and you will totally free-assortment rearing assistance is expanding as they ensure it is birds to higher reveal their natural habits [step 3,4]. In the Italy, the brand new Veneto region keeps a long traditions from poultry reproduction, several poultry types have been popular for the majority centuries, plus the midst of the final century, some twin-mission purebreds are available having fun with white- and you can brown-eggshell breeds . The initial reputation one distinguishes the new types, based on their origin, ‘s the colour of the brand new eggshell, once the chicken genotypes has actually a new phylogenetic resource, that have developed individually regarding crazy Gallus genus immediately following domestication, and several muscles characteristics differ between them. Following the classification advised from the Ghigi, inside the 1905, the brand new residential poultry types would be divided in to three communities, considering their morphological, physiological and you can useful qualities . Discover breeds, which happen to be instance crazy Gallus genus, demonstrating very early gains and you will sexual maturity and you may a premier creation of egg having white eggshells. To the contrary, you can find types very distinct from crazy Gallus , showing delay increases and you can sexual readiness, lowest eggs manufacturing having brown eggshells, and you can, on 3rd category, you can find intermediate types, also known as dual-objective types, and this let you know intermediate qualities, with similarity on the types of the first otherwise second classification . In reality, it is known your types generating eggs with white eggshells has muscles progress, a beneficial metabolic profile and you may structure way more ideal for highest eggs production than simply brown eggshell breeds. Which physiological status, better showed by the white eggshell hybrids [eight,8], demonstrates this new mineral intake is used for some of your skeletal and you can muscle growth till the onset of installing and utilized for egg manufacturing, to prevent competition to the eaten nutrition between looks innovation and eggs formation. More recently, degree, centered on SNP variety, genotyped of numerous poultry breeds and you can hybrids across the globe to test the fresh hereditary variety anywhere between and into the communities towards energetic handling of poultry genetic info [9,10]. Differences in genetic diversity during the society was indeed shown involving the very picked commercial coating traces and some African, Southern area American and lots of local Asian and you will Eu types , including some Italian breeds .

Dana DiRenzo, MD