Spawning behaviour and induced breeding of an estuarine catfish, Mystus gulio (Ham.)
Spawning behaviour of hormone induced estuarine catfish, Mystus gulio was observed in captive condition. Spawning activities that include pairing, chasing and resting, nudging, and twisting, started about 5 hours post injection and ended with release of eggs within 1-2 hours of courtship. Three different dosages of "ovaprim" (1 ml/kg, 1.5 ml/kg, and 2 ml/kg in a single dose) were used in induced breeding of M gulio. The latency period was less (6-7 hours) with the dose of 1.5 and 2 ml/kg, while it was more (7-8 hours) with that of 1 ml/kg. However, all females spawned successfully with each of three different dosages, without any significant differences in the rate of fertilization and hatching. Eggs under all hormone dosages hatched between 18-20 hours after spawning. The hatching rate with 1, 1.5, and 2 ml/kg varied from 71.3-72.7%, corresponding to the fertilization rate of 80.7-84.7%.
| Main Authors: | , , , |
|---|---|
| Format: | article biblioteca |
| Language: | English |
| Published: |
2006
|
| Subjects: | Aquaculture, Biology, spawning behaviour, induced breeding, Mystus gulio, nona tengra, Bangladesh, India, |
| Online Access: | http://hdl.handle.net/1834/34191 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|