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Details van artikel 2 van 10 gevonden artikelen
| Titel: |
Circadian Variation in Phototactic Behaviour of Walking Indian Catfish, Clarias batrachus |
| Auteur: |
Ghosh, Sreejeeta Pati, Atanu Kumar |
| Verschenen in: |
Biological rhythm research |
| Paginering: | Jaargang 35 (2004) nr. 4-5 pagina's 367-375 |
| Jaar: |
2004-10 |
| Inhoud: |
Temporal organization in phototactic rhythm in male Clarias batrachus was studied in a choice chamber consisting of a photic zone and an aphotic zone. Results indicate that most of the fishes exhibited a statistically significant 24-h variation in the frequency of visits to the photic zone with a peak frequency at late night or early morning. Cosinor analysis of phototactic index (PI) values also yielded comparable results. This behaviour of C. batrachus shows similarity with its other activities, like air gulping, surfacing, foraging or predation that occur chiefly at night. The light intensity at the surface of a natural water body is more than at the bottom, even at night. Therefore, the peak phototactic activity observed in C. batrachus in the night or early morning could be attributed to its daily migration from the bottom to the surface of the water bodies. The results of the present study might be useful in aquaculture practice and inland fishing. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 2 van 10 gevonden artikelen
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