Comparative study on gonad development in rainbow trout (Oncorhynchus mykiss) reared in fresh and brackish water in the Yazd Province
Rainbow trout (Oncorhylichus mikiss) weidting 200±5 grams were used in this study to compare their gonad development in fresh and brackish water in Yazd Province. The culture period lasted 140 days from October to March 2003 during which time the temperature 03.8+0.6), pH (8.18±0.12) and dissolved oxygen (6.2+0.11) of fresh and brackish water were kept nearly constant. The salinity of fresh and brackish water was 0.4 -0.5 and 14.3-14.7ppt respectively. The fish were fed common commercial trout food (Chineh GFT2) based on temperature and biomass. Histological studies indicated that the gonad development is accelerated in brackish water where the males mature two month eal her than those reared in freshwater. The gonadosomatic index (G51) also affirmed the gonad development (P<0.05).
| Main Authors: | , , , |
|---|---|
| Format: | article biblioteca |
| Language: | Persian |
| Published: |
2006
|
| Subjects: | Biology, Gonad development, Rainbow trout, Oncorhynchus mykiss, Histological study, Yazd Province, Iran, |
| Online Access: | http://hdl.handle.net/1834/39101 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|