Učinak duljine skladištenja na kvalitetu jaja i valivost kokoši Rhode Island Red.

In this research study, hatchability results and some internal egg quality characteristics of 0, 2, 3, 5, 7 and 9 d stored eggs in RIR were examined. It was determined that the effect of storage time on hatchability, hatchability of fertile eggs, embryonic mortality, chick weight, albumen weight, yolk weight, albumen index, yolk index and Haugh unit was significant (P<0.05). There was no positive or negative effect of storage time on the fertility rates, but there was a negative effect of storage time on egg weight, hatchability, embryonic development and chick weight on d 3 (P<0.05). It was determined that prolonged storage time caused a decrease in the albumen weight, yolk weight, albumen index, yolk index and Haugh unit value of Rhode Island Red eggs. Rhode Island Red eggs should not be stored more than 3 d.U radu su istraženi valivost i karakteristike jaja pasmine Rhode Island Red u uvjetima različite duljine skladištenja od 0, 2, 3, 5, 7 i 9 dana. Duljina skladištenja statistički je značajno (P<0,05) utjecala na valivost, valivost oplođenih jaja, smrtnost embrija, masu pilića, masu bjelanjka, masu žumanjka, indeks bjelanjka, indeks žumanjka te na vrijednost Haughove jedinice. Nije utvrđen ni pozitivan ni negativan učinak duljine skladištenja na stopu plodnosti, ali je duljina skladištenja od 3 dana značajno utjecala (P<0,05) na masu jaja, valivost, razvoj embrija i masu pilića. Ustanovljeno je da u jaja Rhode Island Red kokoši produženo vrijeme skladištenja dovodi do smanjenja mase bjelanjka, mase žumanjka, indeksa bjelanjka, indeksa žumanjka i vrijednost Haughove jedinice. Zaključeno je da jaja kokoši Rhode Island Red ne bi trebalo skladištiti dulje od 3 dana

Animal Reproduction

Reproduction is the backbone of animal-based food production. The reproductive systems of animals vary and are species-dependent. In this regard, all terrestrial animals perform internal fertilization, whereas aquatic animals perform different reproductive strategies such as internal fertilization without mating, external fertilization, viviparous, oviparous, and parthenogenesis. Today, reproductive biotechnology is an important part of the conservation and propagation of animals. This book addresses several hot topics in the field of reproduction of terrestrial and aquatic animals. Over five sections and eight chapters, this volume examines subjects such as cryopreservation, embryo transfer, avian reproduction, intraovarian gestation, and more