Historical DNA reveals the demographic history of Atlantic cod (Gadus morhua) in medieval and early modern Iceland.
| Autor: | Ólafsdóttir GÁ; Research Centre of the Westfjords, University of Iceland, , Adalstraeti 21, IS415 Bolungarvik, Iceland, VÖR Marine Research Centre, , Nordurtangi, IS355 Snæfellsbær, Iceland, Department of Environmental and Life Science, University of Iceland, , Sturlugata 7, IS101 Reykjavík, Iceland., Westfall KM, Edvardsson R, Pálsson S |
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| Jazyk: | angličtina |
| Zdroj: | Proceedings. Biological sciences [Proc Biol Sci] 2014 Jan 08; Vol. 281 (1777), pp. 20132976. Date of Electronic Publication: 2014 Jan 08 (Print Publication: 2014). |
| DOI: | 10.1098/rspb.2013.2976 |
| Abstrakt: | Atlantic cod (Gadus morhua) vertebrae from archaeological sites were used to study the history of the Icelandic Atlantic cod population in the time period of 1500-1990. Specifically, we used coalescence modelling to estimate population size and fluctuations from the sequence diversity at the cytochrome b (cytb) and Pantophysin I (PanI) loci. The models are consistent with an expanding population during the warm medieval period, large historical effective population size (NE), a marked bottleneck event at 1400-1500 and a decrease in NE in early modern times. The model results are corroborated by the reduction of haplotype and nucleotide variation over time and pairwise population distance as a significant portion of nucleotide variation partitioned across the 1550 time mark. The mean age of the historical fished stock is high in medieval times with a truncation in age in early modern times. The population size crash coincides with a period of known cooling in the North Atlantic, and we conclude that the collapse may be related to climate or climate-induced ecosystem change. |
| Databáze: | MEDLINE |
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