Blar i Bergen Open Research Archive på forfatter "Folkvord, Arild"
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A chromosome-level assembly of the Atlantic herring genome-detection of a supergene and other signals of selection
Pettersson, Mats E.; Rochus, Christina M.; Han, Fan; Chen, Junfeng; Hill, Jason; Wallerman, Ola; Fan, Guangyi; Hong, Xiaoning; Xu, Qiwu; Zhang, He; Liu, Shanshan; Liu, Xin; Haggerty, Leanne; Hunt, Toby; Martin, Fergal J.; Flicek, Paul; Bunikis, Ignas; Folkvord, Arild; Andersson, Leif (Peer reviewed; Journal article, 2019)The Atlantic herring is a model species for exploring the genetic basis for ecological adaptation, due to its huge population size and extremely low genetic differentiation at selectively neutral loci. However, such studies ... -
“A cleaner break”: Genetic divergence between geographic groups and sympatric phenotypes revealed in ballan wrasse (Labrus bergylta)
Seljestad, Gaute; Sanchez, Maria Quintela; Faust, Ellika; Halvorsen, Kim Aleksander Tallaksen; Besnier, Francois; Jansson, Eeva; Dahle, Geir; Knutsen, Halvor; André, Carl; Folkvord, Arild; Glover, Kevin (Journal article; Peer reviewed, 2020)Capture and long‐distance translocation of cleaner fish to control lice infestations on marine salmonid farms has the potential to influence wild populations via overexploitation in source regions, and introgression in ... -
A combination of genetic and phenotypic characterization of spring- and autumn-spawning herring suggests gene flow between populations
Berg, Florian; Østgaard, Hedda Dugstad; Slotte, Aril; Andersson, Leif; Folkvord, Arild (Journal article; Peer reviewed, 2020)Atlantic herring (Clupea harengus) has complex population structure and dynamics including diverse life histories and spawning times with spring and autumn spawning as the most common modes. Originally, spawning herring ... -
Comparison of Otolith Microstructure of Herring Larvae and Sibling Adults Reared Under Identical Early Life Conditions
Tonheim, Susanne; Slotte, Aril; Andersson, Leif; Folkvord, Arild; Berg, Florian (Journal article; Peer reviewed, 2020-07-03)Atlantic herring (Clupea harengus) is a euryhaline species, occupying fully marine habitats (35 psu) in the North Atlantic, as well as brackish waters (<20 psu) such as in the adjacent Baltic Sea. We co-reared Atlantic ... -
Development stage distribution as a proxy for feeding success and growth for first feeding Norwegian spring spawning herring larvae
Stenevik, Erling Kåre; Nash, Richard David Marriott; Folkvord, Arild (Journal article; Peer reviewed, 2020)The estimation of growth rates in young herring larvae (Clupea harengus) in the field can be difficult because the primary increments in the otoliths may not be discernible or formed at a daily level. Likewise, the estimation ... -
Differences in growth and survival between cod Gadus morhua and herring Clupea harengus early stages co-reared at variable prey concentrations
Folkvord, Arild; Vollset, Knut Wiik; Catalan, Ignacio (Peer reviewed; Journal article, 2015-09-28)It was hypothesized that the survival and growth strategies of herring Clupea harengus, displaying a flexible reproductive activity, are adapted to coping with longer periods of prey deprivation (i.e. more variable prey ... -
Earlier hatching and slower growth: a key to survival in the early life history of Norwegian spring spawning herring
Slotte, Aril; Husebø, Åse; Berg, Florian; Stenevik, Erling Kåre; Folkvord, Arild; Fossum, Petter; Mosegaard, Henrik; Vikebø, Frode Bendiksen; Nash, Richard David Marriott (Peer reviewed; Journal article, 2018-10-02)Faster growth in fish larvae is often associated with enhanced survival, and here we investigated whether surviving juvenile Norwegian spring spawning herring Clupea harengus L. generally come from a pool of fast-growing ... -
Ecological adaptation in Atlantic herring is associated with large shifts in allele frequencies at hundreds of loci
Han, Fan; Jamsandekar, Minal; Pettersson, Mats; Su, Leyi; Fuentes-Pardo, Angela P.; Davis, Brian W.; Bekkevold, Dorte; Berg, Florian; Casini, Michele; Dahle, Geir; Farrell, Edward D.; Folkvord, Arild; Andersson, Leif (Journal article; Peer reviewed, 2020)Atlantic herring is widespread in North Atlantic and adjacent waters and is one of the most abundant vertebrates on earth. This species is well suited to explore genetic adaptation due to minute genetic differentiation at ... -
The effect of nutritional condition by two nucleic acid derived indices on the growth to post-flexion of Atlantic bluefin tuna and Atlantic bonito larvae
Blanco, Edurne; Reglero, Patricia; Hernández de Rojas, Alma; Ortega, Aurelio; de la Gándara, Fernando; Folkvord, Arild (Peer reviewed; Journal article, 2019)Notochord flexion increases the swimming capacity of fish larvae, aids in the capture of mobile prey, and coincides with the timing of when the physiological capacities of larvae begin to develop significantly, allowing ... -
Effects of temperature on tissue-diet isotopic spacing of nitrogen and carbon in otolith organic matter
Godiksen, Jane Aanestad; Chung, Ming-Tsung; Folkvord, Arild; Grønkjær, Peter (Peer reviewed; Journal article, 2019)Reconstruction of the trophic position of a fish can be performed by analysing stable nitrogen and carbon isotopes in otolith protein. However, ambient temperature may affect the tissue–diet isotopic spacing of stable ... -
Egg buoyancy variability in local populations of Atlantic cod (Gadus morhua)
Jung, Kyung-Mi; Folkvord, Arild; Kjesbu, Olav Sigurd; Agnalt, Ann Lisbeth; Thorsen, Anders; Sundby, Svein (Peer reviewed; Journal article, 2012)Previous studies have found strong evidences for Atlantic cod (Gadus morhua) egg retention in fjords, which are caused by the combination of vertical salinity structure, estuarine circulation, and egg specific gravity, ... -
Experimental parameterisation of principal physics in buoyancy variations of marine teleost eggs
Jung, Kyung Mi; Folkvord, Arild; Kjesbu, Olav Sigurd; Sundby, Svein (Peer reviewed; Journal article, 2014-08-14)It is generally accepted that the high buoyancy of pelagic marine eggs is due to substantial influx of water across the cell membrane just before ovulation. Here we further develop the theoretical basis by applying laboratory ... -
Foraging behaviour of larval cod (Gadus morhua) at low light intensities
Vollset, Knut Wiik; Folkvord, Arild; Browman, H. I. (Peer reviewed; Journal article, 2011-02-13)The ability to forage at lowlight intensities can be of great importance for the survival of fish larvae in a pelagic environment. Three-dimensional silhouette imaging was used to observe larval cod foraging and swimming ... -
The genetic basis for ecological adaptation of the Atlantic herring revealed by genome sequencing
Barrio, Alvaro Martinez; Lamichhaney, Sangeet; Fan, Guangyi; Rafati, Nima; Pettersson, Mats; Zhang, He; Dainat, Jacques; Ekman, Diana; Höppner, Marc P.; Jern, Patric; Martin, Marcel; Nystedt, Björn; Liu, Xin; Chen, Wenbin; Liang, Xinming; Shi, Chengcheng; Fu, Yuanyuan; Ma, Kailong; Zhan, Xiao; Feng, Chungang; Gustafson, Ulla; Rubin, Carl-Johan; Almén, Markus Sällman; Blass, Martina; Casini, Michele; Folkvord, Arild; Laikre, Linda; Ryman, Nils; Lee, Simon Ming-Yuen; Xu, Xun; Andersson, Leif (Peer reviewed; Journal article, 2016-05-03)Ecological adaptation is of major relevance to speciation and sustainable population management, but the underlying genetic factors are typically hard to study in natural populations due to genetic differentiation caused ... -
Genetic factors have a major effect on growth, number of vertebrae and otolith shape in Atlantic herring (Clupea harengus)
Berg, Florian; Almeland, Oda W.; Skadal, Julie; Slotte, Aril; Andersson, Leif; Folkvord, Arild (Peer reviewed; Journal article, 2018-01-11)Atlantic herring, Clupea harengus, have complex population structures. Mixing of populations is known, but the extent of connectivity is still unclear. Phenotypic plasticity results in divergent phenotypes in response to ... -
Genetic origin and salinity history influence the reproductive success of Atlantic herring
Berg, Florian; Slotte, Aril; Andersson, Leif; Folkvord, Arild (Peer reviewed; Journal article, 2018)Atlantic herring populations inhabit environments ranging in salinity from fully marine to nearly freshwater, but their relative reproductive success in these respective environments remains unclear. We conducted factorial ... -
Impact of hatch-date on early life growth and survival of Mueller's pearlside (Maurolicus Muelleri) larvae, and life-history consequences
Folkvord, Arild; Gundersen, Geir; Albretsen, Jon; Asplin, Lars; Kaartvedt, Stein; Giske, Jarl (Peer reviewed; Journal article, 2016-02)Growth and survival of Maurolicus muelleri larvae in Herdlefjorden, Norway, were investigated by daily otolith increment analysis. While high egg densities were generally observed throughout the spawning season, three ... -
Moderate nucleotide diversity in the Atlantic herring is associated with a low mutation rate
Feng, Chungang; Pettersson, Mats; Lamichhaney, Sangeet; Rubin, Carl-Johan; Rafati, Nima; Casini, Michele; Folkvord, Arild; Andersson, Leif (Peer reviewed; Journal article, 2017-06-30)The Atlantic herring is one of the most abundant vertebrates on earth but its nucleotide diversity is moderate (π = 0.3%), only three-fold higher than in human. Here, we present a pedigree-based estimation of the mutation ... -
Reconstruction of the birth of a male sex chromosome present in Atlantic herring
Rafati, Nima; Chen, Junfeng; Herpin, Amaury; Pettersson, Mats; Han, Fan; Feng, Chungang; Wallerman, Ola; Rubin, Carl-Johan; Péron, Sandrine; Cocco, Arianna; Larsson, Mårten; Trötschel, Christian; Poetsch, Ansgar; Korsching, Kai; Bönigk, Wolfgang; Körschen, Heinz G.; Berg, Florian; Folkvord, Arild; Benjamin Kaupp, Kaupp; Schartl, Manfred; Andersson, Leif (Journal article; Peer reviewed, 2020)The mechanisms underlying sex determination are astonishingly plastic. Particularly the triggers for the molecular machinery, which recalls either the male or female developmental program, are highly variable and have ... -
Recurrent convergent evolution at amino acid residue 261 in fish rhodopsin
Hill, Jason; Enbody, Erik D.; Pettersson, Mats E.; Sprehn, C. Grace; Bekkevold, Dorte; Folkvord, Arild; Laikre, Linda; Kleinau, Gunnar; Scheerer, Patrick; Andersson, Leif (Peer reviewed; Journal article, 2019)The evolutionary process that occurs when a species colonizes a new environment provides an opportunity to explore the mechanisms underlying genetic adaptation, which is essential knowledge for understanding evolution and ...