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March 7, 2026PLoS ONEOpen Access

Moving north: Warmer waters expand populations of deep-water cartilaginous fishes into Arctic waters

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Authors

RJRomaric JacJAJon AlbretsenHHHannes Höffle

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Overview

Long-term trends reveal northward shifts in abundance of deep-water chondrichthyans, indicating ecological impacts of climate change.

Key Points

  • The research aims to analyze distribution and abundance trends of deep-water chondrichthyans in response to ocean warming.
  • Analyzed 26 years of data from Norwegian scientific bottom trawl surveys
  • Focus on three chondrichthyan species: rabbitfish, velvet-belly lanternshark, and blackmouth catshark
  • Utilized generalized additive models for data analysis
  • GIS-based spatial mapping to visualize distribution changes
  • All three species exhibited significant northward shifts in abundance over the past two decades
  • Magnitude and rate of shifts varied among species
  • Several prey species also showed latitudinal shifts, indicating a potential trophic linkage
  • Findings suggest that warming waters are driving poleward redistribution of these fishes

Cite This Study

Jac et al. (2026) studied this question.

synapsesocial.com/papers/69abc2855af8044f7a4ec2dchttps://doi.org/10.1371/journal.pone.0343778
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