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May 8, 2026Animal Conservation

The Need to Manage Prey Fish Biomass to Support Shark Conservation

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Authors

AHAlastair R. HarborneRZRachel ZuercherMHMichael R. Heithaus

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Overview

Randomized trial reveals the importance of prey abundance for Caribbean reef shark sightings, indicating a need for better prey management.

Key Points

  • This research examines how prey fish biomass affects the visibility of the Caribbean reef shark Carcharhinus perezi on Bahamian reefs.
  • Analyzed data from 631 baited remote underwater video stations (BRUVS) across eight islands.
  • Developed a model of prey fish biomass using 85 underwater visual surveys and additional biophysical data.
  • Employed a generalized linear model to correlate shark sightings with prey biomass metrics.
  • C. perezi sightings increased with higher mean prey biomass per 4 ha (exact rates not provided).
  • Sightings were negatively correlated with total prey abundance, suggesting sharks preferred smaller reef patches with dense prey.
  • Larger reef patches with more total prey biomass were less frequented by C. perezi, possibly due to competition with larger sharks.

Cite This Study

Harborne et al. (2026) studied this question.

synapsesocial.com/papers/69fd7e42bfa21ec5bbf0663bhttps://doi.org/10.1111/acv.70067
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