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Ecdysis failure in Asian horseshoe crab larvae of Tachypleus gigas under laboratory observation

Horseshoe crab has recently been categorized as a halal commodity which exposed them to un-sustainable exploitation. As grouped among the arthropods, Asian horseshoe crab, Tachypleus gigas, rely on ecdysis to grow. The stage of ecdysis itself is the most crucial step in their life cycle and could ca...

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Main Authors: Kassim, Zaleha, Md. Razak, Mohd. Razali, Hazahari, Noor Yuslida, Yunus, Kamaruzzaman
Format: Proceeding Paper
Language:English
Published: AIJR Publisher 2023
Subjects:
QH301 Biology
Online Access:http://irep.iium.edu.my/107212/6/107212_Ecdysis%20failure%20in%20Asian%20horseshoe%20crab%20larvae%20of%20Tachypleus%20gigas%20under%20laboratory%20observation.pdf
http://irep.iium.edu.my/107212/
https://books.aijr.org/index.php/press/catalog/book/155/chapter/2502
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spelling my.iium.irep.1072122023-10-02T08:34:03Z http://irep.iium.edu.my/107212/ Ecdysis failure in Asian horseshoe crab larvae of Tachypleus gigas under laboratory observation Kassim, Zaleha Md. Razak, Mohd. Razali Hazahari, Noor Yuslida Yunus, Kamaruzzaman QH301 Biology Horseshoe crab has recently been categorized as a halal commodity which exposed them to un-sustainable exploitation. As grouped among the arthropods, Asian horseshoe crab, Tachypleus gigas, rely on ecdysis to grow. The stage of ecdysis itself is the most crucial step in their life cycle and could cause death if it cannot be completed successfully. This study investigated the different types of ecdysis failure in the larval stage using Scanning Electron Microscope (SEM) technique. Samples of the molted skeleton that were left behind after the ecdysis process were immediately collected and prepared for SEM. Three types of molting failures were identified from the observation prosomatic failure, opishosomatic failure, and appendage failure. These failures were classified according to the position of the larvae body part where the exuviae were stuck at. Two out of three failures, pro-somatic and opisthosomatic ecdysis failure would cause death instantly as the exuviae stuck at the vital organ, gills, and prevent it to function well in the breathing process. The micrograph obtained from the SEM study could be an important record for an evolutionary and growth study of this living fossil. It will also contribute to the understanding of the conservation effort for the species. AIJR Publisher 2023-08-22 Proceeding Paper PeerReviewed application/pdf en http://irep.iium.edu.my/107212/6/107212_Ecdysis%20failure%20in%20Asian%20horseshoe%20crab%20larvae%20of%20Tachypleus%20gigas%20under%20laboratory%20observation.pdf Kassim, Zaleha and Md. Razak, Mohd. Razali and Hazahari, Noor Yuslida and Yunus, Kamaruzzaman (2023) Ecdysis failure in Asian horseshoe crab larvae of Tachypleus gigas under laboratory observation. In: International Halal Science Conference 2023 (IHASC23), 22-23 Aug 2023, International Islamic University Malaysia (IIUM). Kuala Lumpur. https://books.aijr.org/index.php/press/catalog/book/155/chapter/2502 DOI: https://doi.org/10.21467/abstracts.155
institution Universiti Islam Antarabangsa Malaysia
building IIUM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider International Islamic University Malaysia
content_source IIUM Repository (IREP)
url_provider http://irep.iium.edu.my/
language English
topic QH301 Biology
spellingShingle QH301 Biology
Kassim, Zaleha
Md. Razak, Mohd. Razali
Hazahari, Noor Yuslida
Yunus, Kamaruzzaman
Ecdysis failure in Asian horseshoe crab larvae of Tachypleus gigas under laboratory observation
description Horseshoe crab has recently been categorized as a halal commodity which exposed them to un-sustainable exploitation. As grouped among the arthropods, Asian horseshoe crab, Tachypleus gigas, rely on ecdysis to grow. The stage of ecdysis itself is the most crucial step in their life cycle and could cause death if it cannot be completed successfully. This study investigated the different types of ecdysis failure in the larval stage using Scanning Electron Microscope (SEM) technique. Samples of the molted skeleton that were left behind after the ecdysis process were immediately collected and prepared for SEM. Three types of molting failures were identified from the observation prosomatic failure, opishosomatic failure, and appendage failure. These failures were classified according to the position of the larvae body part where the exuviae were stuck at. Two out of three failures, pro-somatic and opisthosomatic ecdysis failure would cause death instantly as the exuviae stuck at the vital organ, gills, and prevent it to function well in the breathing process. The micrograph obtained from the SEM study could be an important record for an evolutionary and growth study of this living fossil. It will also contribute to the understanding of the conservation effort for the species.
format Proceeding Paper
author Kassim, Zaleha
Md. Razak, Mohd. Razali
Hazahari, Noor Yuslida
Yunus, Kamaruzzaman
author_facet Kassim, Zaleha
Md. Razak, Mohd. Razali
Hazahari, Noor Yuslida
Yunus, Kamaruzzaman
author_sort Kassim, Zaleha
title Ecdysis failure in Asian horseshoe crab larvae of Tachypleus gigas under laboratory observation
title_short Ecdysis failure in Asian horseshoe crab larvae of Tachypleus gigas under laboratory observation
title_full Ecdysis failure in Asian horseshoe crab larvae of Tachypleus gigas under laboratory observation
title_fullStr Ecdysis failure in Asian horseshoe crab larvae of Tachypleus gigas under laboratory observation
title_full_unstemmed Ecdysis failure in Asian horseshoe crab larvae of Tachypleus gigas under laboratory observation
title_sort ecdysis failure in asian horseshoe crab larvae of tachypleus gigas under laboratory observation
publisher AIJR Publisher
publishDate 2023
url http://irep.iium.edu.my/107212/6/107212_Ecdysis%20failure%20in%20Asian%20horseshoe%20crab%20larvae%20of%20Tachypleus%20gigas%20under%20laboratory%20observation.pdf
http://irep.iium.edu.my/107212/
https://books.aijr.org/index.php/press/catalog/book/155/chapter/2502
_version_ 1781777361086185472
score 13.211869

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