Environmental Physiology of Aquatic Animals

A special issue of Fishes (ISSN 2410-3888). This special issue belongs to the section "Physiology and Biochemistry".

Deadline for manuscript submissions: 30 June 2025 | Viewed by 2160

Special Issue Editor

Fish Physiology and Resource Utilization Laboratory, College of Life Science and Technology, Harbin Normal University, Harbin 150025, China
Interests: fish physiology; behavior; immunity

Special Issue Information

Dear Colleagues,

The survival and reproduction of aquatic animals are closely tied to the water environment in which they live. Factors such as the water temperature, salinity, dissolved oxygen, and pH value play a crucial role in determining the wellbeing of aquatic animals. To survive and reproduce successfully, aquatic animals must adapt to these environmental changes through physiological mechanisms. Studying the environmental physiology of aquatic animals can assist farmers in optimizing breeding conditions, enhancing efficiency, and reducing costs, ultimately promoting sustainable development in the aquaculture industry. Understanding the environmental physiological characteristics of aquatic animals is essential for comprehending their responses to environmental changes and predicting population dynamics. This Special Issue aims to highlight research on the physiological strategies of aquatic animals in adapting to various environmental conditions, along with the impacts of environmental factors on their growth, reproduction, behavior, and other physiological processes. Our findings will enhance the scientific basis for enhancing farming practices, as well as safeguarding and managing aquatic animal resources.

Dr. Weijie Mu
Guest Editor

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Keywords

  • aquatic animals
  • adaptability
  • environmental response
  • physiological mechanism
  • propagation and breeding
 

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Published Papers (3 papers)

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Research

14 pages, 2988 KiB  
Article
Physiological Function Disturbances and Adaptive Responses in Nile Tilapia (Oreochromis niloticus) Under Different Salinity Stresses
by Ping Li, Tengzhou Li, Shaoying Xing, Ling Liu and Zhi-Hua Li
Fishes 2024, 9(12), 498; https://doi.org/10.3390/fishes9120498 - 3 Dec 2024
Viewed by 518
Abstract
The physiological functions of aquatic organisms are closely linked to changes in environmental salinity. High-salinity environments can disrupt energy metabolism, induce inflammation, and negatively impact normal growth and development. However, aquatic organisms possess self-regulatory mechanisms that can mitigate these impacts to some extent. [...] Read more.
The physiological functions of aquatic organisms are closely linked to changes in environmental salinity. High-salinity environments can disrupt energy metabolism, induce inflammation, and negatively impact normal growth and development. However, aquatic organisms possess self-regulatory mechanisms that can mitigate these impacts to some extent. This study aimed to investigate the adaptive regulatory processes in Nile tilapia (Oreochromis niloticus, Linnaeus, 1758) exposed to high-salinity environments by evaluating metabolic enzyme activities and levels of inflammatory markers. The increased levels of IL-1β and elevated ACP activity suggested that high-salinity conditions (15 and 30 ppt) induced intestinal inflammation. Concurrently, the elevated activities of SOD and GSH, along with decreased SDH activity, pointed to heightened oxidative stress in the brain and a reduced mitochondrial energy supply. Additionally, the adaptive features of intestinal energy metabolism under high-salinity conditions were evident, with adjustments in HK and PK activities mitigating the effects of suppressed PFK activity. Moreover, elevated lipase (LPS) activity in muscle tissue under salinity stress indicated that fat is mobilized to supply energy for muscle activity without affecting muscle protein. In conclusion, salinity stress triggered inflammatory and oxidative stress responses in Nile tilapia, yet the fish exhibited self-regulatory processes in energy metabolism. This study provides a theoretical basis for understanding the adaptive mechanisms of aquatic organisms in stressful environments. Full article
(This article belongs to the Special Issue Environmental Physiology of Aquatic Animals)
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18 pages, 3815 KiB  
Article
Living Along Distribution Margins: Differences in the Body and Biochemistry of Red Squat Lobster Morphotypes (Grimothea monodon) from the Humboldt Current System
by Marco Quispe-Machaca, Maximiliano Zilleruelo, Pepe Espinoza, Gabriela Torres and Ángel Urzúa
Fishes 2024, 9(11), 445; https://doi.org/10.3390/fishes9110445 - 31 Oct 2024
Viewed by 671
Abstract
Grimothea monodon, an important fishery resource in the Humboldt Current marine ecosystem (HCE), present two contrasting morphotypes (PM, pelagic morphotype; BM, benthic morphotype). The fishery management of G. monodon is focused on understanding only fishery aspects that apply to a limited area, [...] Read more.
Grimothea monodon, an important fishery resource in the Humboldt Current marine ecosystem (HCE), present two contrasting morphotypes (PM, pelagic morphotype; BM, benthic morphotype). The fishery management of G. monodon is focused on understanding only fishery aspects that apply to a limited area, and there are currently no studies that evaluate the nutritional status of these morphotypes. This study evaluated the biological performance of PM and BM, analyzing the body (size, CL; weight, W; condition factor, Kn) and biochemical condition (glucose, G; proteins, P; lipids, L; fatty acids, FAs). The results reveal that G. monodon showed differences in CL and W between morphotypes, with higher values in BM than PM. The Kn was different between morphotypes with a tendency of isometric growth. In turn, the G contents were higher in PM than BM, while the contents of P, L, and FAs showed an opposite tendency, with higher contents recorded in BM than PM. Our findings suggest that the Kn should be included to strengthen the biological parameters and their relationships used in fishery management models. Differences in the biochemical condition between morphotypes can be considered potentially adaptive, in response to the combined effect of environmental factors that vary in the HCE. Full article
(This article belongs to the Special Issue Environmental Physiology of Aquatic Animals)
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12 pages, 2470 KiB  
Article
Comparative Metabolomic Analysis Reveals the Impact of the Photoperiod on the Hepatopancreas of Chinese Grass Shrimp (Palaemonetes sinensis)
by Duojia Qu, Chunyan Fu, Muyu Han and Yingdong Li
Fishes 2024, 9(11), 444; https://doi.org/10.3390/fishes9110444 - 31 Oct 2024
Viewed by 584
Abstract
The photoperiod is a key environmental factor that in crustaceans influences development, feeding, and metabolism. In this study, liquid chromatography-tandem mass spectrometry was used to examine metabolic changes in Palaemonetes sinensis under different photoperiods. Our results showed that key metabolic pathways, such as [...] Read more.
The photoperiod is a key environmental factor that in crustaceans influences development, feeding, and metabolism. In this study, liquid chromatography-tandem mass spectrometry was used to examine metabolic changes in Palaemonetes sinensis under different photoperiods. Our results showed that key metabolic pathways, such as linoleic acid metabolism, axon regeneration, pyrimidine metabolism, and cortisol synthesis, were significantly altered under both constant light (24L:0D) and constant darkness (0L:24D) compared with natural light conditions. The photoperiod notably affected the digestive and metabolic functions of P. sinensis. Most metabolic pathways were downregulated under full darkness and full light conditions, suggesting that inhibition of metabolism is a potential adaptive response. Furthermore, enzyme assays revealed significant variations in trypsin, lipase, and amylase activity across different photoperiods, highlighting the profound impact of light conditions on digestive functions. These findings suggest that extreme light conditions may negatively impact the metabolic and digestive functions of P. sinensis. This study provides new insights into the adaptive mechanisms of P. sinensis in response to photoperiod changes and offers valuable information for optimizing aquaculture practices to enhance the health and growth performance of this crustacean. Full article
(This article belongs to the Special Issue Environmental Physiology of Aquatic Animals)
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