?? ??? ??????- ???? ??????Cyprinus carpio L. ???????? ??????? ?? ???? ????? ???? ?????? ?????????
The present study includes monitoring the development and maturation in females ovaries Cyprinus carpio L.Which were collected from Al-Hammar Marsh south Iraq, from July 2006 to June 2007 , selected environmental factors( such as air and water temperature ,salinity and day light) were measured in...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
University of Thi-Qar
2019-05-01
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| Series: | مجلة علوم ذي قار |
| Online Access: | https://mail.jsci.utq.edu.iq/index.php/main/article/view/207 |
| Summary: | The present study includes monitoring the development and maturation in females ovaries
Cyprinus carpio L.Which were collected from Al-Hammar Marsh south Iraq, from July 2006 to
June 2007 , selected environmental factors( such as air and water temperature ,salinity and day
light) were measured in the study area .
Depending on values of the Gonado Somatic index (G.S.I) through out the reproductive
cycle for one year, there are five growth and maturation stages were observed in the ovaries.
namely: Resting stage; it was presented in August & September . The averages of GSI values
varied from 0.96-2.20. Developing & Maturing stage; it was presented in October, December,
January & February. The averages of G.S.I values varied from 3.56-5.45. Prespawning stage; it
was presented in March , with an G.S.I values 12.95 .
Spawning stage; it was presented in April & May , with an G.S.I values varied from 3.49-5.19.
Post spawning stage; it was presented in June & July ,with averages of G.S.I varied from1.92-2.13
The process of oviposition started from April up to May .This indicate that the spawning
period of this species dose not suit the same period of annual prevention 15/2-15/4 ,which is
issued by Ministry of Agriculture . Eggs were released in batches . |
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| ISSN: | 1991-8690 2709-0256 |