Biochemical, Physiological and Ecological Assessments in Marine Top Predators

A special issue of Journal of Marine Science and Engineering (ISSN 2077-1312). This special issue belongs to the section "Marine Biology".

Deadline for manuscript submissions: 20 June 2026 | Viewed by 1029

Special Issue Editors


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Guest Editor
Institute of Environment, Florida International University, Miami, FL 33199, USA
Interests: acoustics, anthropogenic and environmental pressures; bioenergetics; cetaceans; conservation biology; conservation physiology; ecology; ecotoxicology; endocrinology; marine mammals; One Health; oxidative stress biomarkers; physiological responses; physiology; sirenians; toxicology; wildlife; zoology
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Environmental Health Assessment and Promotion Laboratory, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Rio de Janeiro CEP 21040-900, Brazil
Interests: biological oceanography; environmental chemistry; ecotoxicology; One Health; food safety; (metalo) proteomics; conservation of natural and fishery resources; scientific dissemination and environmental education
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Marine top predators play a crucial role in maintaining the structure and function of ocean ecosystems. As sentinels of marine environmental health, these species are increasingly exposed to cumulative anthropogenic stressors, including chemical pollution, climate change, noise, habitat degradation, and overfishing. The use of biochemical and physiological biomarkers in marine mammals, seabirds, and large predatory fishes has proven to be a powerful approach to understanding sublethal effects, stress responses, and early signs of disease or population vulnerability.

This Special Issue aims to explore the current state of knowledge and recent advances in the assessment of health, conditions, and environmental exposure in marine top predators, encompassing biochemical, physiological, ecological, and behavioral indicators at the molecular, cellular, organismal, and population levels, as well as biomarker-based assessments in marine top predators, encompassing molecular, cellular, and organism-level indicators of health and exposure. We encourage the submission of articles that present innovative methods, longitudinal studies, cross-species comparisons, and case studies from different geographic regions. Historical perspectives and syntheses are also welcome, particularly those that integrate biomarker data with ecological, toxicological, or conservation frameworks.

We are especially interested in original research articles and comprehensive reviews that advance the application of biomarkers in conservation physiology, ecotoxicology, and the health monitoring of marine wildlife. Studies focusing on emerging contaminants, climate-driven physiological stress, immune and endocrine disruption, and novel diagnostic tools are also encouraged.

Dr. Leila Soledade Lemos
Dr. Rachel Ann Hauser-Davis
Guest Editors

Manuscript Submission Information

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Keywords

  • marine top predators
  • biomarkers
  • anthropogenic stressors
  • environmental stressors
  • climate change
  • health assessment
  • oxidative stress
  • sentinel species
  • conservation physiology
  • ecotoxicology

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Published Papers (1 paper)

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Research

14 pages, 2436 KB  
Article
Cetaceans Change Their Acoustic Behavior During the Airgun Noise of Seismic Surveys
by Israel Maciel, Rodrigo Tardin, Sergio Carvalho Moreira, Gabriel Melo-Santos, Guilherme Maricato and Maria Alice S. Alves
J. Mar. Sci. Eng. 2026, 14(2), 181; https://doi.org/10.3390/jmse14020181 - 15 Jan 2026
Viewed by 771
Abstract
Seismic surveys introduce high levels of noise into the soundscape. Thus, a major concern is the effect of these noise levels on animal communication, especially for species with high hearing acuity, such as cetaceans. We evaluated the effects of airgun pulses of seismic [...] Read more.
Seismic surveys introduce high levels of noise into the soundscape. Thus, a major concern is the effect of these noise levels on animal communication, especially for species with high hearing acuity, such as cetaceans. We evaluated the effects of airgun pulses of seismic surveys on the acoustic behavior of humpback whales (Megaptera novaeangliae) and pantropical spotted dolphins (Stenella attenuata) in the two most important basins for oil and gas off Brazil. We detect the presence of airgun pulses and measure sound pressure levels (SPL) to evaluate whether SPL changed the acoustic parameters of cetacean vocalizations. Airgun pulses increased the SPL by 17%. This changes acoustic parameters differently: whales reduced call frequency and duration, while dolphins increased these parameters. In both cases, responses may be related to physiological limitations in sound modulation of each species. This was the first report on the impacts of seismic surveys on cetaceans’ communications in Brazil and the first for the pantropical spotted dolphin on this topic in the world. Impacts vary with the frequency and duration of emissions, indicating species-specific acoustic responses that depend on airgun noise characteristics. Whales cannot make efficient adjustments at higher or lower frequencies, and dolphins cannot adjust at lower frequencies. These results are important for discussing the effects of airgun noise on cetacean communication. Full article
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