The chronological development of embryo in Rutilus frisii kutum, Kamensky
The chronological development of Rutilus frisii kutum, Kamensky from Caspian Sea was investigated. Artificial propagation was carried out by stripping sperm on the eggs. The gametes were gently mixed for 5 minutes, then incubated at 14-16°C in 8 liter glass incubators. Development of embryos including organogenesis and different chronological developmental stages were followed up morphologically and histologically. As the chorion is semitransparent in this species, we were forced to dechlorinate the eggs. So the chorionic is develops of the embryos were removed under stereomicroscope using two fine needles; weight and length of the samples at each stage were measured for statistical analysis. The embryos were prepared for serial sectioning and microscopic studies. The developmental stages were investigated from 5 minutes after fertilization up to day 30. Fertilized eggs were cleaved and gastrulation began within 24-30 hours. Most of the embryos began to batch out of chorion (Vitelline membrane) at 216 hours (10 days after fertilization) and resorption of the yolk material was completed in day 16. After this stage, the larvae matured and began to swim up and feed on fish food (swim up, fry stage). Twenty-four stages of embryonic development of this fish at 14-16 °C have been described with emphasis on the cleavage stages and morphogenesis of external organs and body tissues.
| Main Authors: | , , |
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| Format: | article biblioteca |
| Language: | Persian |
| Published: |
1993
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| Subjects: | Biology, Fisheries, Weight, Tissues, Length, Propagation, Species, Chronological, Rutilus frisii kutum, Caspian Sea, Iran, |
| Online Access: | http://hdl.handle.net/1834/38265 |
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