INDUCTION OF SPAWNING IN THE TROPICAL WALKING CATFISH (Clarias batrachus) BY CONTROLLING WATER LEVEL AND TEMPERATURE
AbstractThis experiment was carried out to confirmÂ the role of water levelÂ and water temperature in
inducing the spawning of tropical walking catfish. Mature males and females reared under 23 - 25 Â°C,
were paired and induced to spawn by controlling water level and water temperature.
Decreasing water level and returning it to its original level resulted in a low spawning rate (less than
6.7 %) at 23 Â°C. Decreasing waterÂ level with simultaneous increase in water temperature, followedÂ by
returning the respective levels to their originals gave high spawning rates (41.7 â€” 50 %); whereas the same
treatment but without any water temperature decreased when the water level was returned to the initial
level, gave a low spawning rate (16.7 %). Increasing water level only, failed to induce spawning. A high
spawning rate was obtained also when changes in water level were carried out under high temperature
of 28 Â°C. No fish spawned in the absence of the environmental stimulation.
From the results, it is confirmed that water level and temperature play important roles in inducing
spawning of tropical walking catfish. Changes in water temperature probably increase the sensitivity of fish
to the change inÂ water level. ProlongedÂ exposure to highÂ water temperature couldÂ also improve the
sensitivity of fish.
Key words: Walking catfish / spawning / water level / water temperature
Download data is not yet available.
How to Cite
JR., M. Z., FURUKAWA, K., & AiDA, K. (2011). INDUCTION OF SPAWNING IN THE TROPICAL WALKING CATFISH (Clarias batrachus) BY CONTROLLING WATER LEVEL AND TEMPERATURE. BIOTROPIA - The Southeast Asian Journal of Tropical Biology, (16). https://doi.org/10.11598/btb.2001.0.16.165
Authors who publish with this journal agree with the following terms:
- Authors retain copyright and grant the journal right of first publication, with the work 1 year after publication simultaneously licensed under a Creative Commons attribution-noncommerical-noderivates 4.0 International License that allows others to share, copy and redistribute the work in any medium or format, but only where the use is for non-commercial purposes and an acknowledgement of the work's authorship and initial publication in this journal is mentioned.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).