Population stratification in Northern shrimp (Pandalus borealis) off Iceland evident from RADseq analysis
Abstract The northern shrimp Pandalus borealis (ice. Stóri kampalampi) is a North Atlantic crustacean of significant commercial interest which has been harvested consistently in Icelandic waters since 1936. In Icelandic waters, the length at which this protandrous species transitions from male to fe...
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| Format: | Article |
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BMC
2025-04-01
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| Series: | BMC Ecology and Evolution |
| Online Access: | https://doi.org/10.1186/s12862-025-02369-9 |
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| author | Áki Jarl Láruson Hafrún Gunnarsdóttir Jake Goodall Snæbjörn Pálsson Ingibjörg G. Jónsdóttir |
| author_facet | Áki Jarl Láruson Hafrún Gunnarsdóttir Jake Goodall Snæbjörn Pálsson Ingibjörg G. Jónsdóttir |
| author_sort | Áki Jarl Láruson |
| collection | DOAJ |
| description | Abstract The northern shrimp Pandalus borealis (ice. Stóri kampalampi) is a North Atlantic crustacean of significant commercial interest which has been harvested consistently in Icelandic waters since 1936. In Icelandic waters, the length at which this protandrous species transitions from male to female differs between the inshore and offshore populations, suggesting a biologically meaningful stratification which may or may not be plastic. Using reduced representative genomes assembled from RADseq data, sampled from 96 individuals collected at two time points (2018 and 2021), we compare the level of genetic structure across a gradient extending out of Skjálfandi bay, north Iceland. These data are compared to samples from a far offshore site, some 65 km out from the bay, as well as another inshore fjord in Arnarfjörður, in northwestern Iceland. Since 1999, no harvesting of inshore populations of P. borealis in Skjálfandi has been allowed due to stock decline, but harvesting of offshore stocks has continued. Uncertainty surrounding the extent of structure between the in- and offshore aggregations has remained. Here we report distinct genetic structure defining the inshore and offshore populations of northern shrimp, but find significant admixture between the two. Most importantly, we see that genetically inshore populations of northern shrimp extend far outside the harvest boundaries of inshore shrimp, and offshore individuals may exhibit punctuated migration into the inshore areas. |
| format | Article |
| id | doaj-art-059cefd9f2134d1491d36650bc3851af |
| institution | DOAJ |
| issn | 2730-7182 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | BMC |
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| series | BMC Ecology and Evolution |
| spelling | doaj-art-059cefd9f2134d1491d36650bc3851af2025-08-20T03:06:56ZengBMCBMC Ecology and Evolution2730-71822025-04-0125111010.1186/s12862-025-02369-9Population stratification in Northern shrimp (Pandalus borealis) off Iceland evident from RADseq analysisÁki Jarl Láruson0Hafrún Gunnarsdóttir1Jake Goodall2Snæbjörn Pálsson3Ingibjörg G. Jónsdóttir4Marine and Freshwater Research InstituteNortheast Iceland Nature Research CentreFaculty of Life and Environmental Sciences, University of IcelandFaculty of Life and Environmental Sciences, University of IcelandFaculty of Life and Environmental Sciences, University of IcelandAbstract The northern shrimp Pandalus borealis (ice. Stóri kampalampi) is a North Atlantic crustacean of significant commercial interest which has been harvested consistently in Icelandic waters since 1936. In Icelandic waters, the length at which this protandrous species transitions from male to female differs between the inshore and offshore populations, suggesting a biologically meaningful stratification which may or may not be plastic. Using reduced representative genomes assembled from RADseq data, sampled from 96 individuals collected at two time points (2018 and 2021), we compare the level of genetic structure across a gradient extending out of Skjálfandi bay, north Iceland. These data are compared to samples from a far offshore site, some 65 km out from the bay, as well as another inshore fjord in Arnarfjörður, in northwestern Iceland. Since 1999, no harvesting of inshore populations of P. borealis in Skjálfandi has been allowed due to stock decline, but harvesting of offshore stocks has continued. Uncertainty surrounding the extent of structure between the in- and offshore aggregations has remained. Here we report distinct genetic structure defining the inshore and offshore populations of northern shrimp, but find significant admixture between the two. Most importantly, we see that genetically inshore populations of northern shrimp extend far outside the harvest boundaries of inshore shrimp, and offshore individuals may exhibit punctuated migration into the inshore areas.https://doi.org/10.1186/s12862-025-02369-9 |
| spellingShingle | Áki Jarl Láruson Hafrún Gunnarsdóttir Jake Goodall Snæbjörn Pálsson Ingibjörg G. Jónsdóttir Population stratification in Northern shrimp (Pandalus borealis) off Iceland evident from RADseq analysis BMC Ecology and Evolution |
| title | Population stratification in Northern shrimp (Pandalus borealis) off Iceland evident from RADseq analysis |
| title_full | Population stratification in Northern shrimp (Pandalus borealis) off Iceland evident from RADseq analysis |
| title_fullStr | Population stratification in Northern shrimp (Pandalus borealis) off Iceland evident from RADseq analysis |
| title_full_unstemmed | Population stratification in Northern shrimp (Pandalus borealis) off Iceland evident from RADseq analysis |
| title_short | Population stratification in Northern shrimp (Pandalus borealis) off Iceland evident from RADseq analysis |
| title_sort | population stratification in northern shrimp pandalus borealis off iceland evident from radseq analysis |
| url | https://doi.org/10.1186/s12862-025-02369-9 |
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