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