Our new method of otolith metabolic proxy is released today in the journal “Communications Biology” from Nature. We are excited to demonstrate how we use stable carbon isotope values recorded in otoliths to reconstruct fish field metabolic rate. Our study provides the first high-resolution metabolic rate estimates for fish in the field. Moreover, our approach now allows researchers to make use of the large archives of otoliths systematically collected for more than 100 years in order to investigate historical and contemporary changes to fish physiology.
Please see details: https://www.nature.com/articles/s42003-018-0266-5
Capelin (Mallotus villosus) feeding is strongly influenced by the zooplankton community in the fjord ecosystem. Our study examined the stomach content of capelin to conclude the importance of larger zooplankton and euphausiids in capelin’s ecology and the influence of Arctic and sub-Arctic fjord ecosystems. More details: https://link.springer.com/article/10.1007/s00300-018-2400-8
Continue reading “Feeding ecology of capelin (Mallotus villosus) in a fjord impacted by glacial meltwater (Godthåbsfjord, Greenland)”
The Kapisillit River is the only salmon (Salmo salar) river in Greenland, in which the population size of Atlantic salmon is currently much lower than in the late 1950s and in aa loss of genetic diversity. Our study emphasise the importance of management and monitoring in fishing mortality. More details: https://onlinelibrary.wiley.com/doi/full/10.1111/fme.12306
Continue reading “Population decline in the endemic Atlantic salmon ( Salmo salar ) in Kapisillit River, Greenland”
Three‐spined stickleback (Gasterosteus aculeatus) in populations in Denmark and Greenland have been applying to test the evolutionary hypothesis of genomic parallelism. This study provides empirical evidence and support. More details: https://onlinelibrary.wiley.com/doi/full/10.1111/mec.14782
Continue reading “Genomic parallelism and lack thereof in contrasting systems of three-spine sticklebacks”
One more master student defence this past Tuesday. Kasper showed that stable nitrogen and carbon isotope values recorded in muscle tissues of larval fish can tell us their mother size.
On Monday (25/06), Kris-Email told us how we can analyse otolith microstructure, daily increments, to investigate different growth rates between two genetically distinct populations of Atlantic Cod (Gadus morhua) in the Norwegian fjords.
On the 23rdof April, I started my internship at NAFO. I am now halfway through it, and I don’t look forward to the ending of it. I have enjoyed it immensely, with both different projects and with wonderful people to welcome me. But a little background information on NAFO.
Continue reading “Our student, Sebastian, shares his internship experience at NAFO”
The new publication, which Peter and Kris-Emil are participated in, was released in April. Two ecotypes of Atlantic cod, “fjord” and “North Sea”, show different life history traits but stable coexistence within the same habitat. Click it and read more.
Three of our lab’s members, Peter, Charlotte and Ming, attended 6th Otolith Symposium on 15th-20th April in Taiwan. In total, we have three oral presentations and two posters. Check our outstanding research works and conference photos in our photo galleries!
Continue reading “Presentations in the 6th Otolith Symposium, Taiwan”
An annually-resolved cross-dated chronology was built over 114 years using 38 Glycymeris glycymeris shells, both live and dead collected from the Bay of Brest, France. Standard sclerochronology techniques along with COFECHA and ARSTAN provided a statistically robust expressed population signal (EPS) which correlated with various environmental factors such as inflow from the River Elorn, food availability, salinity and annual rainfall. All this could be traced back to food availability pushed into the Bay of Brest, using a PCA.
Click here to get the article.