• N Sivarami Reddy

      Articles written in Proceedings – Animal Sciences

    • Hatching patterns in the silkwormBombyx mori L. (PM × NB4D2) under different photoperiodic combinations

      N Sivarami Reddy K Sasira Babu

      More Details Abstract Fulltext PDF

      Hatching pattern in the silkworm,Bombyx mori L. (PM × NB4D2) under different photoperiodic conditions was studied. Hatching was predominantly diurnal under natural solar day conditions (LD 12:12). The observed LD pattern prevailed under all the photoperiodic conditions. Hatching confined to a single day under all the short-day conditions as also LD 12:12 and DD conditions. All the long-day photoperiodic conditions, as also continuous light (LL), resulted in broadening of the hatching peaks with reduced amplitudes, with extended hatching for two days apart from long hatching durations with more hatching on the second day. The hatching rhythmicity seems to be under circadian control. Maximum hatching was observed under LD 11:13 photoperiodic combination. Shortest hatching duration was observed under LD 11:13 condition.

    • Moulting patterns in the silkworm,Bomhyx mori L. (PM × NB4D2) under different photoperiodic conditions

      N Sivarami Reddy T Pavan Kumar K Sasira Babu

      More Details Abstract Fulltext PDF

      Moulting patterns in the silkworm,Bomhyx mori L. (PM × NB4D2) under different photoperiodic conditions were studied. Moulting phenomenon, inBombyx mori seems to be under the control of the circadian phenomenon. The peaks for the second moult were observed during the dark phase of the photoperiodic schedule expressing nocturnal predominancy. Consequently these peaks for consecutive moults moved into the light part of the 24 h cycle. This clearly demonstrates the instar dependency of the moulting expression. Under LL condition, a damp-out situation in moulting was observed. Moulting durations were greatly affected by photoperiods. Shortest moulting durations were recorded for LD 11:13.

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