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International Journal of Fisheries and Aquatic Studies
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E-ISSN: 2347-5129, P-ISSN: 2394-0506

International Journal of Fisheries and Aquatic Studies

2015, Vol. 3, Issue 2, Part F

Studies on the effect of delayed initial feeding on survival of Macrobrachium dayanum (Henderson) larvae under laboratory conditions


Author(s): Yahya Bakhtiyar, Anshu Samyal, Seema Langer

Abstract: The present study was carried out to evaluate the effect of initial starvation and subsequent refeeding or delayed initial feeding on the survival of newly hatched larvae of Macrobrachium dayanum under laboratory conditions. In the delayed initial feeding experiments, the feeding rate of the starved newly hatched larvae of M. dayanum increased with the age up to 4th dph (day post hatching) when first food was offered. After a period of 5th dph the percentage of larvae feeding decreased sharply up to 9th dph and on 10th dph, no larva was found to feed and were very weak to accept the food. During the experiment, the point of no return (PNR50) (when 50% of the unfed larvae are unable to feed when offered food) was reached in M. dayanum at 6th dph. Before PNR was reached, starved larvae of M. dayanum were able to capture their prey. Even when the larvae were provided food regularly after PNR50 was reached, they were too weak to capture food and showed 100% (PNR100) mortality ultimately on day 8th in case of M. dayanum.

Pages: 463-467  |  910 Views  18 Downloads

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How to cite this article:
Yahya Bakhtiyar, Anshu Samyal, Seema Langer. Studies on the effect of delayed initial feeding on survival of Macrobrachium dayanum (Henderson) larvae under laboratory conditions. Int J Fish Aquat Stud 2015;3(2):463-467.
International Journal of Fisheries and Aquatic Studies