COI
3 stories filed under COI on World Data Ocean. The newest of them: “Validating DNA metabarcoding for fragile Arctic gelatinous zooplankton”, “Gulf of Thailand Physalia Clarified: Taxonomy and Distribution Insights”, and “Unraveling Damselfish Diversity: New Data Clarifies Species Boundaries”. Two universal primer pairs, one targeting 18S rRNA, one mitochondrial COI, reveal complementary strengths and clear limitations for detecting fragile Arctic gelatinous zooplankton. For decades, the species identity of *Physalia* on Thai beaches has remained unresolved, leaving public-health responses without a firm scientific baseline. A Global Hub for Ocean Intelligence 4 World Data Ocean is a centralized digital platform where researchers, scientists, and ocean enthusiasts converge to… The list below is every COI story on World Data Ocean, newest first.
Validating DNA metabarcoding for fragile Arctic gelatinous zooplankton
Two universal primer pairs, one targeting 18S rRNA, one mitochondrial COI, reveal complementary strengths and clear limitations for detecting fragile Arctic gelatinous zooplankton. The COI primers delivered high species-level resolution but missed key hydrozoans and ctenophores; 18S captured broader diversity but lacked taxonomic precision. These findings underscore the urgent need to expand public reference databases and explore new genetic markers. Understanding drives protection, and for these elusive organisms facing climate-driven shifts, validated tools are non-negotiable.
Gulf of Thailand Physalia Clarified: Taxonomy and Distribution Insights
For decades, the species identity of *Physalia* on Thai beaches has remained unresolved, leaving public-health responses without a firm scientific baseline. This study changes that. By integrating morphological traits with multilocus and COI haplotype analyses, the authors provide specimen-based confirmation of *P. utriculus* in the Gulf of Thailand. The finding that local haplotypes dominate, despite shared widespread ones, underscores the need for regional genetic monitoring.
Unraveling Damselfish Diversity: New Data Clarifies Species Boundaries
The blue-green damselfish has long been considered a single, widespread species, but new molecular work reveals that its story is more complex. Multilocus analyses of specimens from India's Lakshadweep Archipelago and the Gulf of Mannar uncovered a distinct lineage, now described as *Chromis veneta* sp. nov. This new species, recognized through both genetic and morphological evidence, shows how much diversity remains hidden on coral reefs.