Laichen von Dorschen in Gefangenschaft. Teil 1: Verlauf der Laichaktivitäten
Individuals of the western stock of Baltic cod were kept at captivity with different temperatures and salinities until natural spawning. Spawning activities up to 16 weeks were observed between February and June. This time interval agrees weIl with the spawning season of the wild cod stock. Also as in in-situ observations larger individuals started earlier with the spawning process than smaller ones and hadsignificantly larger periods of spawning. Larger cods produced more batches and more eggs than smaller cods within this time interval. The comparison between the actual and potential absolut fecundity showed large differences. Only apart of the potential absolut fecundity, estimated in the phase of prespawning development of ovaries, was developed until their release. These analyses showed that larger cod were able to develop a larger part ofthe eggs within the ovaries up to the complete development. This result should be considered in the future during estimations of the population fecundity of the western Baltic spawning stock.
| Main Authors: | , |
|---|---|
| Format: | article biblioteca |
| Language: | German |
| Published: |
1998
|
| Subjects: | Biology, Ecology, Environment, Fisheries, recruitment, fertilization, hatching rate, larval development, Baltic Sea, |
| Online Access: | http://hdl.handle.net/1834/21276 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|