OBSERVATIONS REGARDING THE EMBRYONARY AND LARVAL DEVELOPMENT OF STERLET (ACIPENSER RUTHENUS)
Studying and presenting the embryo stages of sterlet has the main purpose of widening the knowledge horizon in this direction. Although all sterlet embryos originated from one female and from the same incubator (15°C, 9.6 mg/l of dissolved oxygen and a water flow of 2.7 l/min), they are in different...
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| Published in: | Lucrări științifice zootehnie şi biotehnologii Vol. 42; no. 2; p. 71 |
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| Main Authors: | , |
| Format: | Journal Article |
| Language: | English |
| Published: |
Agroprint Timisoara
01-10-2023
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| Subjects: | |
| Online Access: | Get full text |
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| Summary: | Studying and presenting the embryo stages of sterlet has the main purpose of widening the knowledge horizon in this direction. Although all sterlet embryos originated from one female and from the same incubator (15°C, 9.6 mg/l of dissolved oxygen and a water flow of 2.7 l/min), they are in different stages of development at a certain time. Because the asynchronous development of embryos from one incubator is maintained throughout the incubation period, it is explained why not all embryos hatch at the same time. The first hatchings appear at the age of 145 hours from fecundation, the larvae have a very large yolk sack and are moving very fast, especially in obliquely upward direction. At one hour from hatching, the larvae presents clear opercularly movements. The last hatching occurs 193 hours from fecundation. The larval stage for Acipenser ruthenus lasts for 7-8 days, probably the larvae that hatched sooner have also a quicker absorption of yolk sack. |
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| ISSN: | 1841-9364 1841-9364 |