What question did this study set out to answer?

The aim is to evaluate the feasibility of the close-kin mark-recapture method for stock assessment of Indian Ocean swordfish.

March 6, 2026FishesOpen Access

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

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

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.

Chevrier et al. (2026) studied this question.

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