ArticleScientific reports2022
Trajectory to local extinction of an isolated dugong population near Okinawa Island, Japan.
Article in Scientific reports, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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8 citing papers in PubMed.
- Interview-based sighting history to investigate the historical range and dynamics of dugongs in China.Royal Society open science · 2025Article
- Unveiling the Genetic Structure of New Caledonian Dugongs Using a Multiscale Genetic Approach: Conservation Challenges for an Isolated Population.Ecology and evolution · 2025Article
- Population structure ofRoyal Society open science · 2024Article
- Sirenian genomes illuminate the evolution of fully aquatic species within the mammalian superorder afrotheria.Nature communications · 2024Article
- Spatial prioritization of dugong habitats in India can contribute towards achieving the 30 × 30 global biodiversity target.Scientific reports · 2024Article
- Fecal DNA analysis coupled with the sighting records re-expanded a known distribution of dugongs in Ryukyu Islands after half a century.Scientific reports · 2024Article
- Negotiating extirpation: On the political implications of declaring dugongs extinct in Okinawan waters.Cambridge prisms. Extinction · 2024Article
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5 authors.
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Abstract
A small animal population becomes extinct owing to demographic and environmental stochasticity after declining below the minimum viable population (MVP). However, the actual process of extinction derived by stochastic factors after crossing MVP has not been recorded for long-lived marine mammals. Here, we reconstructed the declining history of a small, isolated population of dugongs in Okinawa over 125 years. The initial population size of approximately 280-420 in the nineteenth century declined to approximately < 100 in 1917 because of overfishing, < 70 in 1979, 11 in 1997, 3 after 2006, and all known individuals disappeared or died by 2019. After 1979, a decline in the natural growth rate has led to extinction. Long-lived animals may persist for a few decades after the population falls below the MVP, at which time active conservation measures, such as captive breeding, should be implemented.
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