Low water pH depressed growth and early development of giant freshwater prawn Macrobrachium rosenbergii larvae

Hon, Jung Liew and Sharifah Rahmah and Pei, Wen Tang and Khor, Waiho and Hanafiah Fazhan and Nadiah Wan Rasdi and Siti Izzah Athirah Hamin and Suhairi Mazelan and Sabri Muda and Lim, Leong Seng and Chen, Young-Mao and Yu, Mei Chang and Li, Qun Liang and Mazlan Abd. Ghaffar (2022) Low water pH depressed growth and early development of giant freshwater prawn Macrobrachium rosenbergii larvae. Heliyon, 8 (e09989). pp. 1-12. ISSN 2405-8440

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Abstract

Macrobrachium rosenbergii is one of the shellfish species with high aquaculture value due to its increasing market demand. However, the comparatively low production volume compared to demand coupled with the rapid decline of the natural environment, consequently, drives the potential depletion of the wild population. The decrease in water pH related to anthropogenic pollution is one of the most critical factors affecting the early life performances of M. rosenbergii. Therefore, this study was designed to examine the effect of low water pH on feeding, growth and development of M. rosenbergii early life stages. Experimental water pH was set as neutral (7.7 ± 0.4); mild-acidic (6.4 ± 0.5) and acidic (5.4 ± 0.2) with triplication at a stocking density of 2 larvae/L for 30 days. As expected, M. rosenbergii larvae were highly sensitive to acidic pH with no larvae survived beyond 48 h of exposure. Feeding, survival and growth of larvae were adversely affected by mild-acidic pH exposure as compared to neutral pH. Larvae exposed to mild-acidic water pH experienced a prolonged larval period and only metamorphosed to the post-larval stage at day-30. Whilst under neutral water pH, larval that metamorphosed to post-larval was first observed on day-23. The negative impact of decreased pH, even in mild-acidic pH exposure, on the feeding, survival, growth and development of M. rosenbergii larvae highlights the urgency of periodic pH monitoring during M. rosenbergii larviculture.

Item Type:	Article
Keyword:	Acidification , Aquaculture , Environment , Pollution , Shellfish , Shrimp
Subjects:	S Agriculture > SH Aquaculture. Fisheries. Angling > SH1-691 Aquaculture. Fisheries. Angling > SH201-399 Fisheries > SH365-380.92 Shellfish fisheries. Shellfish culture
Department:	INSTITUTE > Borneo Marine Research Institute
Depositing User:	SAFRUDIN BIN DARUN -
Date Deposited:	27 Sep 2022 11:28
Last Modified:	27 Sep 2022 11:28
URI:	https://eprints.ums.edu.my/id/eprint/34276

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