Ostrich (Struthio camelus) embryonic development from 7 to 42 days of incubation
| Autor: | Zanell Brand, Swp Cloete, Irek Malecki, Chris Brown |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Struthioniformes
Embryo Nonmammalian animal structures 040301 veterinary sciences Hatching Embryogenesis 0402 animal and dairy science Embryonic Development Zoology Embryo 04 agricultural and veterinary sciences General Medicine Biology biology.organism_classification 040201 dairy & animal science 0403 veterinary science Beak Animal science embryonic structures Animals Animal Science and Zoology Incubation Food Science Struthio |
| Zdroj: | British Poultry Science. 58:139-143 |
| ISSN: | 1466-1799 0007-1668 |
| DOI: | 10.1080/00071668.2016.1259529 |
| Popis: | 1. Hatching success of ostrich eggs is poor (50–60% of fertile eggs). The current study was designed to identify the timing of key stages in the development of the ostrich embryo. 2. Growth of both embryo and wing length during 42 d of incubation was comparable and approximately linear, with a more or less weekly doubling in size up to 35 d of incubation. 3. The embryo eye size increased more rapidly than beak length and reached a maximum of ~16.2 mm by 28 d of incubation, whereas beak length increased continuously until hatching at 42 d. 4. Linear regression equations were derived from morphometric measurements of embryos between 7 and 42 d. 5. Information stemming from these results can be used to estimate the age of dead-in-shell embryos in an attempt to identify timing of incubation problems that potentially result in low hatchability of fertile eggs. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|