Effect of differential feed on the molting success and survival of horseshoe crab trilobite (Tachypleus gigas)

Mortality during early life stages of horseshoe crabs especially during the molting of third and fourth instar stage is significantly higher. This is perhaps due to the change in feeding behavior from filter feeding (first and second instar) to active feeding (third instar onwards). Hence, we offe...

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Main Authors:	Akbar John B., Kamaruzzaman B.Y., Jalal K.C.A., Hassan S., Rozihan M.
Format:	Article
Language:	English
Published:	Penerbit Universiti Kebangsaan Malaysia 2017
Online Access:	http://journalarticle.ukm.my/12297/ http://journalarticle.ukm.my/12297/1/46_01_04.pdf

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author	Akbar John B., Kamaruzzaman B.Y., Jalal K.C.A., Hassan S., Rozihan M.,
author_facet	Akbar John B., Kamaruzzaman B.Y., Jalal K.C.A., Hassan S., Rozihan M.,
author_sort	Akbar John B.,
building	UKM Institutional Repository
collection	Online Access
description	Mortality during early life stages of horseshoe crabs especially during the molting of third and fourth instar stage is significantly higher. This is perhaps due to the change in feeding behavior from filter feeding (first and second instar) to active feeding (third instar onwards). Hence, we offered differential microalgae feed (Isochrysis, Spirulina and Isochrysis + Spirulina) to induce molting and improve survival at third instar stages of Malaysian horseshoe crab (Tachypleus gigas). Third instar T. gigas were fed with 3 different concentration of microalgae [Isochrysis (7.5 × 106 cells/L and 0.75 × 106 n cells/L)], [(Spirulina (1 ml/L and 0. ml/L)], [(Isochrysis + Spirulina: (3.75 × 106 cells of Isochrysis + 0.5 ml spirulina/ L and 0.375 × 106 cells of Isochrysis + 0.25 ml spirulina/L)] every 3 days for 30 days interval and morphometric measures were documented. Results revealed that combination of microalgae feed induce molting and survival rate regardless of concentration employed. Significant difference in molting were observed between control and treated groups regardless of feed concentration (p<0.05). There was no mortality of crabs observed in Isochrysis feed tanks while 25% and 20% mortality of crabs (especially appendage lost) were recorded in spirulina and iso+spirulina feed tanks respectively. Molting was observed in all treatment tanks. We suggest that Isochrysis with the concentration of 7.5 × 106 cells/L can be used to induce faster molting in T. gigas instar stage.
first_indexed	2025-11-15T00:10:38Z
format	Article
id	oai:generic.eprints.org:12297
institution	Universiti Kebangasaan Malaysia
institution_category	Local University
language	English
last_indexed	2025-11-15T00:10:38Z
publishDate	2017
publisher	Penerbit Universiti Kebangsaan Malaysia
recordtype	eprints
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spelling	oai:generic.eprints.org:122972018-11-16T11:25:28Z http://journalarticle.ukm.my/12297/ Effect of differential feed on the molting success and survival of horseshoe crab trilobite (Tachypleus gigas) Akbar John B., Kamaruzzaman B.Y., Jalal K.C.A., Hassan S., Rozihan M., Mortality during early life stages of horseshoe crabs especially during the molting of third and fourth instar stage is significantly higher. This is perhaps due to the change in feeding behavior from filter feeding (first and second instar) to active feeding (third instar onwards). Hence, we offered differential microalgae feed (Isochrysis, Spirulina and Isochrysis + Spirulina) to induce molting and improve survival at third instar stages of Malaysian horseshoe crab (Tachypleus gigas). Third instar T. gigas were fed with 3 different concentration of microalgae [Isochrysis (7.5 × 106 cells/L and 0.75 × 106 n cells/L)], [(Spirulina (1 ml/L and 0. ml/L)], [(Isochrysis + Spirulina: (3.75 × 106 cells of Isochrysis + 0.5 ml spirulina/ L and 0.375 × 106 cells of Isochrysis + 0.25 ml spirulina/L)] every 3 days for 30 days interval and morphometric measures were documented. Results revealed that combination of microalgae feed induce molting and survival rate regardless of concentration employed. Significant difference in molting were observed between control and treated groups regardless of feed concentration (p<0.05). There was no mortality of crabs observed in Isochrysis feed tanks while 25% and 20% mortality of crabs (especially appendage lost) were recorded in spirulina and iso+spirulina feed tanks respectively. Molting was observed in all treatment tanks. We suggest that Isochrysis with the concentration of 7.5 × 106 cells/L can be used to induce faster molting in T. gigas instar stage. Penerbit Universiti Kebangsaan Malaysia 2017-03 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/12297/1/46_01_04.pdf Akbar John B., and Kamaruzzaman B.Y., and Jalal K.C.A., and Hassan S., and Rozihan M., (2017) Effect of differential feed on the molting success and survival of horseshoe crab trilobite (Tachypleus gigas). Malaysian Applied Biology, 46 (1). pp. 21-25. ISSN 0126-8643 http://www.mabjournal.com/index.php?option=com_content&view=article&id=623&catid=59:current-view&Itemid=56
spellingShingle	Akbar John B., Kamaruzzaman B.Y., Jalal K.C.A., Hassan S., Rozihan M., Effect of differential feed on the molting success and survival of horseshoe crab trilobite (Tachypleus gigas)
title	Effect of differential feed on the molting success and survival of horseshoe crab trilobite (Tachypleus gigas)
title_full	Effect of differential feed on the molting success and survival of horseshoe crab trilobite (Tachypleus gigas)
title_fullStr	Effect of differential feed on the molting success and survival of horseshoe crab trilobite (Tachypleus gigas)
title_full_unstemmed	Effect of differential feed on the molting success and survival of horseshoe crab trilobite (Tachypleus gigas)
title_short	Effect of differential feed on the molting success and survival of horseshoe crab trilobite (Tachypleus gigas)
title_sort	effect of differential feed on the molting success and survival of horseshoe crab trilobite (tachypleus gigas)
url	http://journalarticle.ukm.my/12297/ http://journalarticle.ukm.my/12297/ http://journalarticle.ukm.my/12297/1/46_01_04.pdf

Effect of differential feed on the molting success and survival of horseshoe crab trilobite (Tachypleus gigas)

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