Population structure and dynamics of Atlantic herring:
A case study of herring inhabiting marginal habitats in Landvikvannet and its vicinity
Of particular interest in the Skagerrak area is a brackish water environment inside Landvikvannet, an inland lake in southern Norway connected to the open sea through an artificial canal. The very different environment inside and outside Landvikvannet, as well as the tidal effects on currents in the human made canal, makes the area interesting for studying potential environmental drivers in herring behavior. It is also an interesting area with regard to potential population differences in behavior and internal drivers, such as maturation status of individual fish. Here, three putative herring populations are observed to co-occur at maturing, spawning and spent stages from March to June, where one population, ‘Landvik herring’, shows high fidelity to the brackish inland lake. Besides ‘Landvik herring’, coastal Skagerrak spring spawning herring exist in neighboring fjords, without conducting large annual migrations like those of Norwegian spring spawning herring, which are also found here. Norwegian spring spawners occur in this area mostly in March before starting their annual migration. ‘Landvik herring’ differs totally from other occurring populations, both phenotypically and genetically.
The project aims mainly to increase the understanding of population structure in Atlantic herring in particular with main focus on Landvikvannet and adjacent waters. As a continuation of his Master thesis project and on the basis of two published papers the overall goal of this project is both to quantify the previous found results and increase the knowledge of the life-time history of ‘Landvik herring’, beginning at egg and larval stages up to mature and spawning adult herring. The results may have implications in management and conservation, as local fish populations may play an important role in fisheries and they are also highly vulnerable.
Eggers, Florian; Almeland, Oda W. ; Slotte, Aril; Andersson, Leif; Folkvord, Arild. 2016. Common garden crossing experiments of herring and their possibilities. YouMares 7. doi: 10.13140/RG.2.2.10505.44647
Eggers, Florian; Folkvord, Arild; Slotte, Aril. 2016. Salinity dependent fertilization rates of herring from Landvikvannet - a recently occupied brackish water habitat. 40th Annual Larval Fish Conference. doi: 10.13140/RG.2.1.4539.3526/1
Eggers, Florian; Husebø, Åse; Godiksen, Jane; Slotte, Aril. 2015. Discrimination of mixing Atlantic herring (Clupea harengus) populations during spawning season based on otolith growth at the larval stage. ICES Annual Science Conference, ICES CM 2015/E:30. doi: 10.13140/RG.2.1.2349.3600
- 2018. Population structure and dynamics of Atlantic herring. A case study of herring inhabiting marginal habitats in Landvikvannet and its vicinity. Universitetet i Bergen.
- 2018. Genetic factors have a major effect on growth, number of vertebrae and otolith shape in Atlantic herring (Clupea harengus). PLoS ONE. 13:e0190995: 1-16. Published 2018-01-11. doi: 10.1371/journal.pone.0190995
- 2018. Genetic origin and salinity history influence the reproductive success of Atlantic herring. Marine Ecology Progress Series. doi: 10.3354/meps12680
- 2018. Earlier hatching and slower growth, a key to survival in the early life history of Norwegian spring spawning herring. Marine Ecology Progress Series. doi: 10.3354/meps12682
- 2017. Spawning time of Atlantic herring (Clupea harengus) populations within a restricted area reflects their otolith growth at the larval stage. Fisheries Research. 194: 68-75. doi: 10.1016/j.fishres.2017.05.009
- 2017. Comparative biology and population mixing among local, coastal and offshore Atlantic herring (Clupea harengus) in the North Sea, Skagerrak, Kattegat and western Baltic. PLoS ONE. 12:e0187374: 1-19. Published 2017-10-30. doi: 10.1371/journal.pone.0187374
- 2017. Fishing profiles of Danish seiners and bottom trawlers in relation to current EU management regulations. Fisheries Management and Ecology. 24: 436-445. Published 2017-10-23. doi: 10.1111/fme.12244
- 2015. Individual habitat transitions of Atlantic herring Clupea harengus in a human-modified coastal system. Marine Ecology Progress Series. 520: 245-256. doi: 10.3354/meps11103
- 2014. Seasonal dynamics of atlantic herring (Clupea harengus L.) populations spawning in the vicinity of marginal habitats. PLoS ONE. 9. doi: 10.1371/journal.pone.0111985
- 2013. Metapopulation dynamics in Atlantic herring (Clupea harengus L.) along the coast of southern Norway and in the local area of Landvikvannet. 100 pages.
- 2011. Use of otolith microstructure analysis to determine particular hatching periods in order to explain distinct length class peaks of juvenile herring (Clupea harengus). University of Rostock. 40 pages.