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March 6, 2026FishesOpen Access

Feasibility of a Close-Kin Mark-Recapture for Stock Assessment of Indian Ocean Swordfish (Xiphias gladius)

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Authors

TCThomas ChevrierDCDominique A. CowartANAnne-Elise Nieblas

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Overview

Pilot study assesses close-kin mark-recapture method for estimating swordfish stock in the Indian Ocean, suggesting promising future applications.

Key Points

  • The aim is to evaluate the feasibility of the close-kin mark-recapture method for stock assessment of Indian Ocean swordfish.
  • Conducted simulations to estimate required sample sizes for detecting kin pairs.
  • Genotyped 2068 swordfish using SNP markers.
  • Analyzed kinship to evaluate genetic relationships among individuals.
  • Identified one parent-offspring pair and at least two half-sibling pairs.
  • Robust estimations require sampling at least 18,000 swordfish over three years.
  • Annual cost for genomic data generation is under 0.5% of the swordfish market value.

Cite This Study

Chevrier et al. (2026) studied this question.

synapsesocial.com/papers/69aa70b8531e4c4a9ff5ad22https://doi.org/10.3390/fishes11030149
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