What does this research mean for the field?

Habitat salinity is not the primary factor driving the genetic structure of freshwater prawns (Macrobrachium and Caridina spp.) in northeastern Thailand, which comprise three principal lineages resolvable through multilocus DNA barcoding. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To assess freshwater prawn diversity and phylogenetic relationships across saline and non-saline habitats in northeastern Thailand using integrative taxonomy.

September 8, 2026BiologyOpen Access

Multilocus DNA Barcoding Resolves Area-Based Genetic Variation in Freshwater Shrimps (Macrobrachium sp. and Caridina sp.) from Saline and Non-Saline Habitats in Northeastern Thailand

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Authors

JSJuthaporn SaengprajakMahasarakham University NPNoppakun PakdeenarongMahasarakham University

Discussion

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Implication

Integrative taxonomic analysis reveals distinct genetic lineages in freshwater prawns, indicating that habitat salinity does not drive genetic differentiation.

Key Points

To assess freshwater prawn diversity and phylogenetic relationships across saline and non-saline habitats in northeastern Thailand using integrative taxonomy.
Sampled 225 mature specimens across 15 sites located in saline (Maha Sarakham province) and non-saline (Mukdahan province) habitats in Thailand.
Performed morphological assessments paired with DNA barcoding across four loci: COI, 16S rRNA, 18S rRNA, and the internal transcribed spacer (ITS).
Morphological and molecular assessments identified three primary lineages corresponding to Macrobrachium lanchesteri, Macrobrachium niphanae, and Caridina sp., with concatenated multilocus analysis offering the highest phylogenetic resolution.
COI provided reliable species discrimination, 16S rRNA detected intra-genus variation, and 18S rRNA along with ITS supported broader lineage boundaries.
Specimens from saline and non-saline environments showed no consistent genetic separation, indicating that environmental salinity is not the primary factor structuring these prawn populations.

Cite This Study

Saengprajak et al. (2026) studied this question.

synapsesocial.com/papers/6a9fd7ab58e84d0ff5b4687b https://doi.org/10.3390/biology15171559

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Implication

Integrative taxonomic analysis reveals distinct genetic lineages in freshwater prawns, indicating that habitat salinity does not drive genetic differentiation.

Multilocus DNA Barcoding Resolves Area-Based Genetic Variation in Freshwater Shrimps (Macrobrachium sp. and Caridina sp.) from Saline and Non-Saline Habitats in Northeastern Thailand

Discussion

Member takes

Implication

Key Points

Cite This Study

Multilocus DNA Barcoding Resolves Area-Based Genetic Variation in Freshwater Shrimps (Macrobrachium sp. and Caridina sp.) from Saline and Non-Saline Habitats in Northeastern Thailand

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Implication

Key Points

Cite This Study

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