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:	John, Akbar, Yunus, Kamaruzzaman, Khan Chowdhury, Ahmed Jalal, S, Hassan, Mohamed, Rozihan
Format:	Article
Language:	English English
Published:	Malaysian Society of Applied Biology 2017
Subjects:	QL Zoology
Online Access:	http://irep.iium.edu.my/58905/ http://irep.iium.edu.my/58905/ http://irep.iium.edu.my/58905/1/58905_EFFECT%20OF%20DIFFERENTIAL%20FEED%20ON%20THE%20MOLTING_article.pdf http://irep.iium.edu.my/58905/2/58905_EFFECT%20OF%20DIFFERENTIAL%20FEED%20ON%20THE%20MOLTING_scopus.pdf

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recordtype	eprints
spelling	iium-589052020-01-10T10:58:28Z http://irep.iium.edu.my/58905/ Effect of differential feed on the molting success and survival of horseshoe crab trilobite ( tachypleus gigas ) John, Akbar Yunus, Kamaruzzaman Khan Chowdhury, Ahmed Jalal S, Hassan Mohamed, Rozihan QL Zoology 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 Malaysian Society of Applied Biology 2017 Article PeerReviewed application/pdf en http://irep.iium.edu.my/58905/1/58905_EFFECT%20OF%20DIFFERENTIAL%20FEED%20ON%20THE%20MOLTING_article.pdf application/pdf en http://irep.iium.edu.my/58905/2/58905_EFFECT%20OF%20DIFFERENTIAL%20FEED%20ON%20THE%20MOLTING_scopus.pdf John, Akbar and Yunus, Kamaruzzaman and Khan Chowdhury, Ahmed Jalal and S, Hassan and Mohamed, Rozihan (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://mabjournal.com/index.php?option=com_content&view=article&id=46&Itemid=55
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English English
topic	QL Zoology
spellingShingle	QL Zoology John, Akbar Yunus, Kamaruzzaman Khan Chowdhury, Ahmed Jalal S, Hassan Mohamed, Rozihan Effect of differential feed on the molting success and survival of horseshoe crab trilobite ( tachypleus gigas )
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
format	Article
author	John, Akbar Yunus, Kamaruzzaman Khan Chowdhury, Ahmed Jalal S, Hassan Mohamed, Rozihan
author_facet	John, Akbar Yunus, Kamaruzzaman Khan Chowdhury, Ahmed Jalal S, Hassan Mohamed, Rozihan
author_sort	John, Akbar
title	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_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_sort	effect of differential feed on the molting success and survival of horseshoe crab trilobite ( tachypleus gigas )
publisher	Malaysian Society of Applied Biology
publishDate	2017
url	http://irep.iium.edu.my/58905/ http://irep.iium.edu.my/58905/ http://irep.iium.edu.my/58905/1/58905_EFFECT%20OF%20DIFFERENTIAL%20FEED%20ON%20THE%20MOLTING_article.pdf http://irep.iium.edu.my/58905/2/58905_EFFECT%20OF%20DIFFERENTIAL%20FEED%20ON%20THE%20MOLTING_scopus.pdf
first_indexed	2023-09-18T21:23:22Z
last_indexed	2023-09-18T21:23:22Z
_version_	1777412029731045376

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

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