A brain and a head for a different habitat : Size variation in four morphs of Arctic charr (Salvelinus alpinus(L.)) in a deep oligotrophic lake

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dc.contributor.author Peris Tamayo, Ana-Maria
dc.contributor.author Devineau, Olivier
dc.contributor.author Praebel, Kim
dc.contributor.author Kahilainen, Kimmo K.
dc.contributor.author ostbye, Kjartan
dc.date.accessioned 2020-11-16T12:17:01Z
dc.date.available 2020-11-16T12:17:01Z
dc.date.issued 2020-10
dc.identifier.citation Peris Tamayo , A-M , Devineau , O , Praebel , K , Kahilainen , K K & ostbye , K 2020 , ' A brain and a head for a different habitat : Size variation in four morphs of Arctic charr (Salvelinus alpinus(L.)) in a deep oligotrophic lake ' , Ecology and Evolution , vol. 10 , no. 20 , pp. 11335-11351 . https://doi.org/10.1002/ece3.6771
dc.identifier.other PURE: 149399495
dc.identifier.other PURE UUID: 8cfb6dde-c632-4f01-90f8-824d088ac576
dc.identifier.other WOS: 000572556700001
dc.identifier.other ORCID: /0000-0002-1539-014X/work/83839604
dc.identifier.uri http://hdl.handle.net/10138/321545
dc.description.abstract Adaptive radiation is the diversification of species to different ecological niches and has repeatedly occurred in different salmonid fish of postglacial lakes. In Lake Tinnsjoen, one of the largest and deepest lakes in Norway, the salmonid fish, Arctic charr (Salvelinus alpinus(L.)), has likely radiated within 9,700 years after deglaciation into ecologically and genetically segregated Piscivore, Planktivore, Dwarf, and Abyssal morphs in the pelagial, littoral, shallow-moderate profundal, and deep-profundal habitats. We compared trait variation in the size of the head, the eye and olfactory organs, as well as the volumes of five brain regions of these four Arctic charr morphs. We hypothesised that specific habitat characteristics have promoted divergent body, head, and brain sizes related to utilized depth differing in environmental constraints (e.g., light, oxygen, pressure, temperature, and food quality). The most important ecomorphological variables differentiating morphs were eye area, habitat, and number of lamellae. The Abyssal morph living in the deepest areas of the lake had the smallest brain region volumes, head, and eye size. Comparing the olfactory bulb with the optic tectum in size, it was larger in the Abyssal morph than in the Piscivore morph. The Piscivore and Planktivore morphs that use more illuminated habitats have the largest optic tectum volume, followed by the Dwarf. The observed differences in body size and sensory capacities in terms of vision and olfaction in shallow and deepwater morphs likely relates to foraging and mating habitats in Lake Tinnsjoen. Further seasonal and experimental studies of brain volume in polymorphic species are needed to test the role of plasticity and adaptive evolution behind the observed differences. en
dc.format.extent 17
dc.language.iso eng
dc.relation.ispartof Ecology and Evolution
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject adaptive radiation
dc.subject ecological speciation
dc.subject evolution
dc.subject phenotypic plasticity
dc.subject polymorphism
dc.subject species complex
dc.subject MAJOR HISTOCOMPATIBILITY COMPLEX
dc.subject SALVELINUS-ALPINUS L
dc.subject RANDOM FOREST
dc.subject PHENOTYPIC PLASTICITY
dc.subject LOCAL ADAPTATION
dc.subject TROPHIC ECOLOGY
dc.subject WHITE MUSCLE
dc.subject MATE CHOICE
dc.subject CLASSIFICATION
dc.subject EVOLUTION
dc.subject 1181 Ecology, evolutionary biology
dc.title A brain and a head for a different habitat : Size variation in four morphs of Arctic charr (Salvelinus alpinus(L.)) in a deep oligotrophic lake en
dc.type Article
dc.contributor.organization Biological stations
dc.contributor.organization Lammi Biological Station
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1002/ece3.6771
dc.relation.issn 2045-7758
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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