Suhaini Mohamad and Hon Jung Liew and Rabiatul Adawiyyah Zainuddin and Sharifah Rahmah and Khor Waiho and Mazlan Abd Ghaffar and Hua Tha Nhan and Jiun-Yan Loh and Lim, Leong Seng and Yumei Chang and Liqun Lian and De Boeck, Gudrun (2021) High environmental temperature and low pH stress alter the gill phenotypic plasticity of Hoven’s carp Leptobarbus hoevenii. [Experiment]
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High environmental temperature and low pH stress alter the gill phenotypic plasticity of Hoven’s carp Leptobarbus hoevenii_ABSTRACT.pdf Download (60kB) |
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High environmental temperature and low pH stress alter the gill phenotypic plasticity of Hoven’s carp Leptobarbus hoevenii.pdf Restricted to Registered users only Download (1MB) | Request a copy |
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.
| Item Type: | Experiment |
|---|---|
| Additional Information: | Hoven’s carp showed high sensitivity towards high temperatures as well as to acidic conditions. The significant changes in the gill filament structure indicated a physiological remodeling strategy with complementary lesions. Hoven’s carp gills may be able to recover to their original state when the environmental stress ends as most of the morphological changes were reversible. Nevertheless, if the exposure stress is persistent for long periods, it may result in severe alterations, which deserves further investigation. |
| Keyword: | Acidification , Aquaculture , Branchial , Climate change , Freshwater fish , Histopathology , Osmoregulation , Remodelling |
| Subjects: | S Agriculture > SH Aquaculture. Fisheries. Angling > SH1-691 Aquaculture. Fisheries. Angling > SH20.3-191 Aquaculture > SH151-179 Fish culture |
| Department: | INSTITUTE > Borneo Marine Research Institute |
| Depositing User: | SAFRUDIN BIN DARUN - |
| Date Deposited: | 01 Mar 2022 09:15 |
| Last Modified: | 01 Mar 2022 09:15 |
| URI: | https://eprints.ums.edu.my/id/eprint/31639 |
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