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4 results on '"Suhaini Mohamad"'

1. Hoven’s carp Leptobarbus hoevenii strategized metabolism needs to cope with changing environment

Author

Suhaini Mohamad, Sharifah Rahmah, Rabiatul Adawiyyah Zainuddin, Yusnita A Thallib, Ros Suhaida Razali, Mohamad Jalilah, Mazlan Abd Ghaffar, Leong-Seng Lim, Yu Mei Chang, Li Qun Liang, Simon Kumar Das, Young-Mao Chen, and Hon Jung Liew

Subjects
Climate change, Osmorespiration, Physiology, Energy, Teleost, Science (General), Q1-390, Social sciences (General), H1-99
Abstract

Current water warming and freshwater acidification undoubtedly affect the life of aquatic animals especially ammonotelic teleost by altering their physiological responses. The effect of temperature (28 °C vs 32 °C) and pH (7 vs. 5) on the metabolic compromising strategies of Hoven's carp (Leptobarbus hoevenii) was investigated in this study. Fishes were conditioned to (i) 28 °C + pH 7 (N28°C); (ii) 32 °C + pH 7 (N32°C); (iii) 28 °C + pH 5 (L28°C) and (iv) 32 °C + pH 5 (L32°C) for 20 days followed by osmorespiration assay. Results showed that feeding performance of Hoven's carp was significantly depressed when exposed to low pH conditions (L28°C and L32°C). However, by exposed Hoven's carp to L32°C induced high metabolic oxygen intake and ammonia excretion to about 2x-folds higher compared to the control group. As for energy mobilization, Hoven's carp mobilized liver and muscle protein under L28°C condition. Whereas under high temperature in both pH, Hoven's carp had the tendency to reserve energy in both of liver and muscle. The findings of this study revealed that Hoven's carp is sensitive to lower water pH and high temperature, thereby they remodeled their physiological needs to cope with the environmental changes condition.

Published
2024
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2. High environmental temperature and low pH stress alter the gill phenotypic plasticity of Hoven's carp Leptobarbus hoevenii

Author

Yu Mei Chang, Suhaini Mohamad, Rabi’atul ‘Adawiyyah Zainuddin, Hon Jung Liew, Leong-Seng Lim, Liqun Liang, Mazlan Abd. Ghaffar, Khor Waiho, Jiun Yan Loh, Hua Thai Nhan, Gudrun De Boeck, and Sharifah Rahmah

Subjects
Gills, 0106 biological sciences, Gill, Carps, Population, Zoology, Aquatic Science, 010603 evolutionary biology, 01 natural sciences, Environmental temperature, Aquaculture, Leptobarbus hoevenii, Animals, Carp, education, Biology, Ecology, Evolution, Behavior and Systematics, Abiotic component, Phenotypic plasticity, education.field_of_study, biology, business.industry, 010604 marine biology & hydrobiology, Temperature, Hydrogen-Ion Concentration, biology.organism_classification, Adaptation, Physiological, sense organs, business
Abstract

Climate warming and low pH environment are known to negatively impact all levels of aquatic organism from cellular to organism and population levels. For ammonotelic freshwater species, any abiotic factor fluctuation will cause disturbance to the fish, specifically at the gills which act as a multifunctional organ to support all biological processes. Therefore, this study was designed to investigate the effect of temperature (28 vs. 32 degrees C) and pH (7.0 vs. 5.0) stress on the gill plasticity of Hoven's carp after 20 days of continuous exposure. The results demonstrated that high temperature and low pH caused severe changes on the primary and secondary lamellae as well as the cells within lamellae. An increasing trend of the proportion available for gas exchange was noticed at high temperature in both pH exposures, which resulted from a reduction of the primary lamellae width with elongated and thinner secondary lamellae compared to fishes at ambient temperature. Following exposure to high temperature and acidic pH, Hoven's carp experienced gill modifications including aneurysm, oedema, hypertrophy, curling of secondary lamellae, epithelial lifting, hyperplasia and lamellae fusion. These modifications are indicators of the coping mechanism of Hoven's carp to the changing environment in order to survive.

Published
2021

3. Environmental changes affecting physiological responses and growth of hybrid grouper - The interactive impact of low pH and temperature

Author

Hua Thai Nhan, Rabi’atul ‘Adawiyyah Zainuddin, Yusnita A Thalib, Mazlan Abd. Ghaffar, Hon Jung Liew, Sharifah Rahmah, Ros Suhaida Razali, and Suhaini Mohamad

Subjects
010504 meteorology & atmospheric sciences, Health, Toxicology and Mutagenesis, 010501 environmental sciences, Toxicology, 01 natural sciences, chemistry.chemical_compound, Animal science, Aquaculture, Animals, Grouper, 0105 earth and related environmental sciences, Epinephelus fuscoguttatus, biology, Glycogen, business.industry, Aquatic ecosystem, Temperature, General Medicine, Hydrogen-Ion Concentration, biology.organism_classification, Pollution, Physiological responses, chemistry, Warm water, Bass, Energy source, business
Abstract

Rising of temperature in conjunction with acidification due to the anthropogenic climates has tremendously affected all aquatic life. Small changes in the surrounding environment could lead to physiological constraint in the individual. Therefore, this study was designed to investigate the effects of warm water temperature (32 °C) and low pH (pH 6) on physiological responses and growth of hybrid grouper (Epinephelus fuscoguttatus ♀ × Epinephelus lanceolatus ♂) juveniles for 25 days. Growth performance was significantly affected under warm water temperature and low-pH conditions. Surprisingly, the positive effect on growth was observed under the interactive effects of warm water and low pH exposure. Hybrid grouper exposed to the interactive stressor of warm temperature and low pH exhibited higher living cost, where HSI content was greatly depleted to about 2.3-folds than in normal circumstances. Overall, challenge to warm temperature and low pH induced protein mobilization as an energy source followed by glycogen and lipid to support basal metabolic needs.

Published
2020

4. High environmental temperature and low pH stress alter the gill phenotypic plasticity of Hoven’s carp Leptobarbus hoevenii

Author

Suhaini Mohamad, Hon Jung Liew, Rabiatul Adawiyyah Zainuddin, Sharifah Rahmah, Khor Waiho, Mazlan Abd Ghaffar, Hua Tha Nhan, Jiun-Yan Loh, Lim, Leong Seng, Yumei Chang, Liqun Lian, De Boeck, Gudrun, Suhaini Mohamad, Hon Jung Liew, Rabiatul Adawiyyah Zainuddin, Sharifah Rahmah, Khor Waiho, Mazlan Abd Ghaffar, Hua Tha Nhan, Jiun-Yan Loh, Lim, Leong Seng, Yumei Chang, Liqun Lian, and De Boeck, Gudrun

Abstract

Climate warming and low pH environment are known to negatively impact all levels of aquatic organism from cellular to organism and population levels. For ammonotelic freshwater species, any abiotic factor fluctuation will cause disturbance to the fish, specifically at the gills which act as a multifunctional organ to support all biological processes. Therefore, this study was designed to investigate the effect of temperature (28 vs. 32°C) and pH (7.0 vs. 5.0) stress on the gill plasticity of Hoven's carp after 20 days of continuous exposure. The results demonstrated that high temperature and low pH caused severe changes on the primary and secondary lamellae as well as the cells within lamellae. An increasing trend of the proportion available for gas exchange was noticed at high temperature in both pH exposures, which resulted from a reduction of the primary lamellae width with elongated and thinner secondary lamellae compared to fishes at ambient temperature. Following exposure to high temperature and acidic pH, Hoven's carp experienced gill modifications including aneurysm, oedema, hypertrophy, curling of secondary lamellae, epithelial lifting, hyperplasia and lamellae fusion. These modifications are indicators of the coping mechanism of Hoven's carp to the changing environment in order to survive.

Published
2021

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