Current Research on Fish Otoliths and their Applications - Volume II

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About this Research Topic

Submission deadlines

  1. Manuscript Summary Submission Deadline 25 December 2025 | Manuscript Submission Deadline 14 April 2026

  2. This Research Topic is currently accepting articles.

Background

The study of fish otoliths has become an essential and versatile tool in ichthyology, fisheries science, ecology, and conservation. The continuous growth, detailed microstructure, chemical composition, and morphology of otoliths provide valuable insights into the age, growth, movement, habitat use, and environmental conditions of bony fishes. The first volume published on the field in Frontiers in Marine Sciences ("Current Research on Fish Otoliths and Their Applications”), released in 2023, compiled twelve articles addressing both the variability in otolith morphology, shape, microstructure and chemical signatures, and their use to improve fish ageing techniques and stock assessment. These contributions significantly advanced our understanding of intra- and interspecific variation, eco-morphological adaptations, and methodological standardization in otolith research.
However, otolith research is a highly innovative and rapidly evolving the field, increasingly integrating with the study of other calcified structures—such as fish scales or cephalopod statoliths. There is thus a clear opportunity to build on the foundation laid by Volume I by both deepening otolith-based research and broadening the scope to include related structures and taxa.

This new volume aims to fill current gaps and explore emerging frontiers in the study of otoliths and analogous calcified elements in aquatic organisms. Building on the momentum of the first volume, this edition aims to (i) highlight new methodological approaches, microchemical techniques, and experimental validation; (ii) illustrate the effective use of otoliths and similar structures (e.g. scales, fin rays, statoliths) to tackle novel ecological and evolutionary questions, particularly in understudied taxa or extreme environments; (iii) evaluate the complementarity of multiple calcified structures in addressing questions on life history, stock structure, migration, growth, and environmental impacts, and (iv) broaden the geographical, taxonomic, and temporal scope of investigations in the field, including studies on palaeo-samples. A key objective of this volume is to encourage integrative approaches that connect morphology, chemistry, genetics, and environmental data to better understand organismal responses to environmental variability, anthropogenic pressures, and habitat change. We invite original research, reviews, methodological advances, data reports, and case studies on topics including, but not limited to:
• Otolith ageing, growth validation, shape and functional morphology
• Otolith microchemistry and isotopic analysis, and their use as palaeo-records
• Technological innovations (e.g., imaging, AI/machine learning-based analyses, automation, standardization)
• Research in understudied environments (e.g. freshwater, deep-sea, or tropical environment) and/or on neglected fish species (e.g., endangered or rare species)
• Comparative studies involving other calcified structures (e.g. scales, fin rays, vertebrae, teeth, statoliths), especially in cephalopods or other invertebrates
• Applications of hard structures analysis to investigate the impacts of climate change, pollution, habitat modification, and other anthropogenic stressors.

Manuscripts that explicitly build on or reference studies from Volume I are especially encouraged, as are those proposing novel perspectives or integrative conceptual frameworks

Article types and fees

This Research Topic accepts the following article types, unless otherwise specified in the Research Topic description:

  • Brief Research Report
  • Community Case Study
  • Data Report
  • Editorial
  • General Commentary
  • Hypothesis and Theory
  • Methods
  • Mini Review
  • Opinion

Articles that are accepted for publication by our external editors following rigorous peer review incur a publishing fee charged to Authors, institutions, or funders.

Keywords: Otolith; Calcified Structures; Morphology; Fish; Marine Zoology; Evolutionary Biology; Life History Traits; Microchemistry; Aquatic Environments; Functional Ecology; Fisheries; Aquaculture; Imaging

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