In marine species experiencing intense fishing pressures, knowledge of genetic structure and local adaptation represent a critical information to assist sustainable management. In this study, we performed a landscape genomics analysis in the American lobster to investigate the issues pertaining to the consequences of making use of putative adaptive loci to reliably infer population structure and thus more rigorously delineating biological management units in marine exploited species. Toward this end, we genotyped 14,893 single nucleotide polymorphism (SNPs) in 4190 lobsters sampled across 96 sampling sites distributed along 1000 km in the northwest Atlantic in both Canada and the USA. As typical for most marine species, we observed a weak, albeit highly significant genetic structure. We also found that adaptive genetic variation allows detecting fine-scale population structure not resolved by neutral genetic variation alone. Using the recent genome assembly of the American lobster, we were able to map and annotate several SNPs located in functional genes potentially implicated in adaptive processes such as thermal stress response, salinity tolerance and growth metabolism pathways. Taken together, our study indicates that weak population structure in high gene flow systems can be resolved at various spatial scales, and that putatively adaptive genetic variation can substantially enhance the delineation of biological management units of marine exploited species.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1111/mec.16653 | DOI Listing |
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9805075 | PMC |
Publication Analysis
Top Keywords
Similar Publications
Ocean warming and acidification alter calcification and innate immune system gene expression in juvenile American lobsters, Homarus americanus.
Comp Biochem Physiol Part D Genomics Proteomics
December 2024
School for the Environment, University of Massachusetts Boston, Boston, MA 02125, USA; Presidents Office, Ursinus College, Collegeville, PA 19426, USA.
Article Synopsis
- The Gulf of Maine is facing severe ocean warming and acidification, impacting the American lobster, with limited research on how these stressors interact specifically on gene expression.
- Two aquarium experiments were conducted that simulated future ocean conditions to assess the effects of these stressors on juvenile lobsters' gene expression, revealing complex responses in genes related to calcification and immune function.
- Findings indicate that elevated temperatures significantly affect gene expression, potentially leading to impaired normal development and increased vulnerability to disease due to these combined stressors.
Post-mortem recrystallization of biogenic amorphous calcium carbonate guided by the inherited macromolecular framework.
Sci Rep
July 2024
Laboratory for Biological Geochemistry, School of Architecture, Civil and Environmental Engineering (ENAC), Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
In contrast to abiotically formed carbonates, biogenetic carbonates have been observed to be nanocomposite, organo-mineral structures, the basic build-blocks of which are particles of quasi-uniform size (10-100 nm) organized into complex higher-order hierarchical structures, typically with highly controlled crystal-axis alignments. Some of these characteristics serve as criteria for inferring a biological origin and the state of preservation of fossil carbonate materials, and to determine whether the biomineralization process was biologically induced or controlled. Here we show that a calcium storage structure formed by the American lobster, a gastrolith initially consisting of amorphous calcium carbonate (ACC) and amorphous calcium phosphate (ACP), post-mortem can crystallize into (thus secondary) calcite with structural properties strongly influenced by the inherited organic matrix.
View Article and Find Full Text PDFExposure of female lobsters to sediments spiked with emamectin benzoate: Effects on eggs and larvae early development.
Sci Total Environ
October 2024
Saint Andrews Biological Station, 125 Marine Science Drive, Saint Andrews, NB E5B 0E4, Canada. Electronic address:
The salmon aquaculture industry is an important economic activity established on both the west and east coast of Canada. To control sea lice infestations, in-feed products like emamectin benzoate (EMB) are widely used. Due to its low solubility and persistence EMB can accumulate in marine sediments and be potentially bioavailable to non-target organisms from months to years.
View Article and Find Full Text PDFRearing condition influences gene expression in postlarval American lobster (Homarus americanus).
PLoS One
July 2024
University of New England, School of Marine and Environmental Programs, Biddeford, Maine, United States of America.
The American lobster (Homarus americanus) is an economically important species in the western Atlantic and its climate-driven range shift northward along the east coast of the United States is well documented. The thermal tolerance of lab-reared postlarvae of this species has been extensively investigated to better understand settlement and recruitment dynamics. However, there have been few studies focused on wild-caught postlarvae, and even fewer that have analyzed lab-rearing conditions in context of diet.
View Article and Find Full Text PDFArticle Synopsis
- * Researchers measured heart and ventilation rates of lobsters in a controlled environment, finding that both rates increased with temperature, peaking at around 26.5 °C for heart rate and 27.4 °C for ventilation.
- * Results indicated discrepancies between heart rates of confined lobsters and those moving freely, highlighting that experimental methods can significantly influence physiological measurements in marine species studies.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!