Effect of salinity on the egg hatching and early larvae of horseshoe crab Tachypleus gigas (muller, 1785) in laboratory culture

Tachypleus gigas (Muller) the Southeast Asian horseshoe crab, is found to nest on sandy beaches in Malaysia, thus biological information about survival of this living fossil become crucial. Laboratory experiments were carried out to investigate the effect of salinity on duration to maturation and ha...

Full description

Bibliographic Details
Main Authors:	Kasim, Zaleha, Izyan, Hazwani, H., Siti Hamidah, Yunus, Kamaruzzaman, Khan Chowdhury, Ahmed Jalal
Format:	Article
Language:	English
Published:	Asian Network for Scientific Information 2011
Subjects:	Q Science (General)
Online Access:	http://irep.iium.edu.my/21828/ http://irep.iium.edu.my/21828/ http://irep.iium.edu.my/21828/ http://irep.iium.edu.my/21828/1/Effect_of_salinity_on_the_egg_hatching_and_early_larvae_of_horseshoe_crab.pdf

id	iium-21828
recordtype	eprints
spelling	iium-218282017-12-07T05:30:41Z http://irep.iium.edu.my/21828/ Effect of salinity on the egg hatching and early larvae of horseshoe crab Tachypleus gigas (muller, 1785) in laboratory culture Kasim, Zaleha Izyan, Hazwani H., Siti Hamidah Yunus, Kamaruzzaman Khan Chowdhury, Ahmed Jalal Q Science (General) Tachypleus gigas (Muller) the Southeast Asian horseshoe crab, is found to nest on sandy beaches in Malaysia, thus biological information about survival of this living fossil become crucial. Laboratory experiments were carried out to investigate the effect of salinity on duration to maturation and hatching success of their eggs. The effect on size, morphological changes and growth of the hatched larvae was also investigated. Eggs of T. gigas were collected from the newly nests made on breeding beach of Pekan, Pahang (Lat 3° 56.915’N; Long 103°21.933’ E) in Peninsular Malaysia. Triplicates of five different salinities (15, 20, 25, 30 and 35 ppt) were chosen for the experiments. A vernier caliper was used for size measurement under a stereo microscope. The morphological changes in prosomal width and length, body length, telson length, opisthosoma length and total length were recorded. Salinity range of between 25 and 35 ppt could be an optimal incubation condition. No egg hatched at salinity 15 and 20 ppt. Highest percentage of hatching was found at 30 ppt (91.11±5.57%). Hatching also occurred at 25 and 35 ppt with 65.56±1.73% and 74.4±2.31% success rate, respectively. The shortest molting time occurred at 15 ppt (25 days after hatching). Total size changes in larvae were also highest at 15 ppt but lowest at 35 ppt. There was no mortality in larvae maintained in all treatments. Early larval development would also affected by the salinity stress but its seemed tolerable. Asian Network for Scientific Information 2011 Article PeerReviewed application/pdf en http://irep.iium.edu.my/21828/1/Effect_of_salinity_on_the_egg_hatching_and_early_larvae_of_horseshoe_crab.pdf Kasim, Zaleha and Izyan, Hazwani and H., Siti Hamidah and Yunus, Kamaruzzaman and Khan Chowdhury, Ahmed Jalal (2011) Effect of salinity on the egg hatching and early larvae of horseshoe crab Tachypleus gigas (muller, 1785) in laboratory culture. Journal of Applied Sciences, 11 (14). pp. 2620-2626. ISSN 1812-5662 (O), 1812-5654 (P) http://www.scialert.net/abstract/?doi=jas.2011.2620.2626 DOI: 10.3923/jas.2011.2620.2626
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	Q Science (General)
spellingShingle	Q Science (General) Kasim, Zaleha Izyan, Hazwani H., Siti Hamidah Yunus, Kamaruzzaman Khan Chowdhury, Ahmed Jalal Effect of salinity on the egg hatching and early larvae of horseshoe crab Tachypleus gigas (muller, 1785) in laboratory culture
description	Tachypleus gigas (Muller) the Southeast Asian horseshoe crab, is found to nest on sandy beaches in Malaysia, thus biological information about survival of this living fossil become crucial. Laboratory experiments were carried out to investigate the effect of salinity on duration to maturation and hatching success of their eggs. The effect on size, morphological changes and growth of the hatched larvae was also investigated. Eggs of T. gigas were collected from the newly nests made on breeding beach of Pekan, Pahang (Lat 3° 56.915’N; Long 103°21.933’ E) in Peninsular Malaysia. Triplicates of five different salinities (15, 20, 25, 30 and 35 ppt) were chosen for the experiments. A vernier caliper was used for size measurement under a stereo microscope. The morphological changes in prosomal width and length, body length, telson length, opisthosoma length and total length were recorded. Salinity range of between 25 and 35 ppt could be an optimal incubation condition. No egg hatched at salinity 15 and 20 ppt. Highest percentage of hatching was found at 30 ppt (91.11±5.57%). Hatching also occurred at 25 and 35 ppt with 65.56±1.73% and 74.4±2.31% success rate, respectively. The shortest molting time occurred at 15 ppt (25 days after hatching). Total size changes in larvae were also highest at 15 ppt but lowest at 35 ppt. There was no mortality in larvae maintained in all treatments. Early larval development would also affected by the salinity stress but its seemed tolerable.
format	Article
author	Kasim, Zaleha Izyan, Hazwani H., Siti Hamidah Yunus, Kamaruzzaman Khan Chowdhury, Ahmed Jalal
author_facet	Kasim, Zaleha Izyan, Hazwani H., Siti Hamidah Yunus, Kamaruzzaman Khan Chowdhury, Ahmed Jalal
author_sort	Kasim, Zaleha
title	Effect of salinity on the egg hatching and early larvae of horseshoe crab Tachypleus gigas (muller, 1785) in laboratory culture
title_short	Effect of salinity on the egg hatching and early larvae of horseshoe crab Tachypleus gigas (muller, 1785) in laboratory culture
title_full	Effect of salinity on the egg hatching and early larvae of horseshoe crab Tachypleus gigas (muller, 1785) in laboratory culture
title_fullStr	Effect of salinity on the egg hatching and early larvae of horseshoe crab Tachypleus gigas (muller, 1785) in laboratory culture
title_full_unstemmed	Effect of salinity on the egg hatching and early larvae of horseshoe crab Tachypleus gigas (muller, 1785) in laboratory culture
title_sort	effect of salinity on the egg hatching and early larvae of horseshoe crab tachypleus gigas (muller, 1785) in laboratory culture
publisher	Asian Network for Scientific Information
publishDate	2011
url	http://irep.iium.edu.my/21828/ http://irep.iium.edu.my/21828/ http://irep.iium.edu.my/21828/ http://irep.iium.edu.my/21828/1/Effect_of_salinity_on_the_egg_hatching_and_early_larvae_of_horseshoe_crab.pdf
first_indexed	2023-09-18T20:33:18Z
last_indexed	2023-09-18T20:33:18Z
_version_	1777408880121217024

Effect of salinity on the egg hatching and early larvae of horseshoe crab Tachypleus gigas (muller, 1785) in laboratory culture

Similar Items