Environmental Influence in Physiological, Endocrine, and Oxidative Stress Responses of Aquatic Invertebrates

A special issue of Animals (ISSN 2076-2615). This special issue belongs to the section "Aquatic Animals".

Deadline for manuscript submissions: 10 March 2025 | Viewed by 2871

Special Issue Editors


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Guest Editor
Department of Cell Biology, University of Brasilia, Brasilia 70910-900, Brazil
Interests: animal ecophysiology; antioxidant; biochemical adaptation; comparative physiology; estivation; free radical; glutathione; hibernation; preparation for oxidative stress; reactive oxygen species; redox biology

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Guest Editor
Research Center in Morphology and Applied Immunology, Faculty of Medicine, University of Brasilia, Brasilia 70910-900, Brazil
Interests: animal ecophysiology; antioxidant; biochemical adaptation; comparative physiology; diapause; estivation; free radical; glutathione; oxidative stress; reactive oxygen species; redox biology
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Instituto de Ciencias Marinas y Limnológicas, Facultad de Ciencias, Universidad Austral de Chile, Valdivia 5090000, Chile
Interests: UV-B; redox biology; larval biology; photoprotective compounds; estuarine and intertidal environments

Special Issue Information

Dear Colleagues,

The life histories of aquatic invertebrates have been shaped by cellular capacities to cope with biotic and abiotic fluctuations imposed by stochastic and/or cyclic environmental processes, thus defining their distribution patterns along latitudinal and bathymetric gradients. These capacities entail maintaining a redox balance (homeostasis) between the levels of reactive species and antioxidant systems and interacting through complex cell signaling pathways. Hormones can participate in these pathways, evoking different physiological and behavioral functions in marine organisms. However, exposure to environmental conditions above or below tolerance limits disrupts homeostasis, generating oxidative stress in a situation that can impair hormonal signaling processes and affect physiological and behavioral responses.

Understanding how fluctuations in environmental conditions define redox balance and downstream pathways, such as endocrine responses, in aquatic organisms is a necessity to explain different physiological responses. This Special Issue addresses how redox metabolism responds to unfavorable environmental conditions (e.g., oxygen levels, extreme temperatures, drought, solar radiation, severe pH levels, and pollutants) and influences endocrine and physiological responses, ultimately determining the fitness of aquatic invertebrates. Submissions addressing ecological and evolutionary implications of redox adaptations as part of the cellular stress response are especially welcome.

Prof. Dr. Marcelo Hermes-Lima
Dr. Daniel Carneiro Moreira
Dr. Víctor M. Cubillos
Guest Editors

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Keywords

  • comparative physiology
  • environmental change
  • hormesis
  • hormone
  • oxidative stress
  • redox biology

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Published Papers (2 papers)

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Research

14 pages, 3542 KiB  
Article
Effects of Low-Salinity Stress on Histology and Metabolomics in the Intestine of Fenneropenaeus chinensis
by Caijuan Tian, Qiong Wang, Tian Gao, Huarui Sun, Jitao Li and Yuying He
Animals 2024, 14(13), 1880; https://doi.org/10.3390/ani14131880 - 26 Jun 2024
Viewed by 943
Abstract
Metabolomics has been used extensively to identify crucial molecules and biochemical effects induced by environmental factors. To understand the effects of acute low-salinity stress on Fenneropenaeus chinensis, intestinal histological examination and untargeted metabonomic analysis of F. chinensis were performed after exposure to [...] Read more.
Metabolomics has been used extensively to identify crucial molecules and biochemical effects induced by environmental factors. To understand the effects of acute low-salinity stress on Fenneropenaeus chinensis, intestinal histological examination and untargeted metabonomic analysis of F. chinensis were performed after exposure to a salinity of 15 ppt for 3, 7, and 14 d. The histological examination revealed that acute stress resulted in most epithelial cells rupturing, leading to the dispersion of nuclei in the intestinal lumen after 14 days. Metabolomics analysis identified numerous differentially expressed metabolites (DEMs) at different time points after exposure to low-salinity stress, in which some DEMs were steadily downregulated at the early stage of stress and then gradually upregulated. We further screened 14 overlapping DEMs, in which other DEMs decreased significantly during low-salinity stress, apart from L-palmitoylcarnitine and vitamin A, with enrichments in phenylalanine, tyrosine and tryptophan biosynthesis, fatty acid and retinol metabolism, and ABC transporters. ABC transporters exhibit significant abnormalities and play a vital role in low-salinity stress. This study provides valuable insights into the molecular mechanisms underlying the responses of F. chinensis to acute salinity stress. Full article
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9 pages, 229 KiB  
Article
Effects of Nutrient Source, Temperature, and Salinity on the Growth and Survival of Three Giant Clam Species (Tridacnidae)
by Rod Ping-Tsan Lee, Yu-Ru Lin, Chih-Yang Huang and Fan-Hua Nan
Animals 2024, 14(7), 1054; https://doi.org/10.3390/ani14071054 - 29 Mar 2024
Viewed by 1309
Abstract
The habitats of giant clams are undergoing environmental changes, and giant clam populations are declining. The present study was conducted to facilitate clam conservation. We conducted three 18-week trials to investigate the effects of nutrient, temperature, and salinity on the growth performance and [...] Read more.
The habitats of giant clams are undergoing environmental changes, and giant clam populations are declining. The present study was conducted to facilitate clam conservation. We conducted three 18-week trials to investigate the effects of nutrient, temperature, and salinity on the growth performance and survival rates (SRs) of juvenile Tridacna noae, adult Tridacna crocea, and subadult Tridacna derasa, respectively. Regarding nutrient sources, no significant differences were observed in shell length gain, specific growth rate, or SR between clams fed with Chaetoceros muelleri or commercial feed (hw nanotip) and those in a control group (juvenile phototrophs). Regarding temperature, clams cultivated at 27 °C exhibited significantly better growth performance and SR than did those cultivated at 19 °C or 31 °C (p < 0.05). By week 6, all clams in the 19 °C and 31 °C groups had died, indicating that suboptimal growth temperatures have severe adverse effects. Regarding salinity, clams cultivated at 34‰ exhibited significantly higher length gains and specific growth rates than did those cultivated at 20‰ or 25‰ (p < 0.05). SR was not significantly affected by salinity. Understanding how environmental factors affect giant clam populations may help researchers devise effective clam conservation strategies. Full article
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