Seasonal variation of behavior and brain size in a freshwater fish

Abstract Teleost fishes occupy a range of ecosystem, and habitat types subject to large seasonal fluctuations. Temperate fishes, in particular, survive large seasonal shifts in temperature, light availability, and access to certain habitats. Mobile species such as lake trout (Salvelinus namaycush) c...

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Autores principales:	Evan J. Versteeg, Timothy Fernandes, Matthew M. Guzzo, Frédéric Laberge, Trevor Middel, Mark Ridgway, Bailey C. McMeans
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2021
Materias:	acoustic telemetry behavior brain regions brain size habitat complexity lake trout Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/bde8b883c34641328bbd3a4a2ddb8e55
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spelling	oai:doaj.org-article:bde8b883c34641328bbd3a4a2ddb8e552021-11-08T17:10:40ZSeasonal variation of behavior and brain size in a freshwater fish2045-775810.1002/ece3.8179https://doaj.org/article/bde8b883c34641328bbd3a4a2ddb8e552021-11-01T00:00:00Zhttps://doi.org/10.1002/ece3.8179https://doaj.org/toc/2045-7758Abstract Teleost fishes occupy a range of ecosystem, and habitat types subject to large seasonal fluctuations. Temperate fishes, in particular, survive large seasonal shifts in temperature, light availability, and access to certain habitats. Mobile species such as lake trout (Salvelinus namaycush) can behaviorally respond to seasonal variation by shifting their habitat deeper and further offshore in response to warmer surface water temperatures during the summer. During cooler seasons, the use of more structurally complex nearshore zones by lake trout could increase cognitive demands and potentially result in a larger relative brain size during those periods. Yet, there is limited understanding of how such behavioral responses to a seasonally shifting environment might shape, or be shaped by, the nervous system. Here, we quantified variation in relative brain size and the size of five externally visible brain regions in lake trout, across six consecutive seasons in two different lakes. Acoustic telemetry data from one of our study lakes were collected during the study period from a different subset of individuals and used to infer relationships between brain size and seasonal behaviors (habitat use and movement rate). Our results indicated that lake trout relative brain size was larger in the fall and winter compared with the spring and summer in both lakes. Larger brains coincided with increased use of nearshore habitats and increased horizontal movement rates in the fall and winter based on acoustic telemetry. The telencephalon followed the same pattern as whole brain size, while the other brain regions (cerebellum, optic tectum, olfactory bulbs, and hypothalamus) were only smaller in the spring. These findings provide evidence that flexibility in brain size could underpin shifts in behavior, which could potentially subserve functions associated with differential habitat use during cold and warm seasons and allow fish to succeed in seasonally variable environments.Evan J. VersteegTimothy FernandesMatthew M. GuzzoFrédéric LabergeTrevor MiddelMark RidgwayBailey C. McMeansWileyarticleacoustic telemetrybehaviorbrain regionsbrain sizehabitat complexitylake troutEcologyQH540-549.5ENEcology and Evolution, Vol 11, Iss 21, Pp 14950-14959 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	acoustic telemetry behavior brain regions brain size habitat complexity lake trout Ecology QH540-549.5
spellingShingle	acoustic telemetry behavior brain regions brain size habitat complexity lake trout Ecology QH540-549.5 Evan J. Versteeg Timothy Fernandes Matthew M. Guzzo Frédéric Laberge Trevor Middel Mark Ridgway Bailey C. McMeans Seasonal variation of behavior and brain size in a freshwater fish
description	Abstract Teleost fishes occupy a range of ecosystem, and habitat types subject to large seasonal fluctuations. Temperate fishes, in particular, survive large seasonal shifts in temperature, light availability, and access to certain habitats. Mobile species such as lake trout (Salvelinus namaycush) can behaviorally respond to seasonal variation by shifting their habitat deeper and further offshore in response to warmer surface water temperatures during the summer. During cooler seasons, the use of more structurally complex nearshore zones by lake trout could increase cognitive demands and potentially result in a larger relative brain size during those periods. Yet, there is limited understanding of how such behavioral responses to a seasonally shifting environment might shape, or be shaped by, the nervous system. Here, we quantified variation in relative brain size and the size of five externally visible brain regions in lake trout, across six consecutive seasons in two different lakes. Acoustic telemetry data from one of our study lakes were collected during the study period from a different subset of individuals and used to infer relationships between brain size and seasonal behaviors (habitat use and movement rate). Our results indicated that lake trout relative brain size was larger in the fall and winter compared with the spring and summer in both lakes. Larger brains coincided with increased use of nearshore habitats and increased horizontal movement rates in the fall and winter based on acoustic telemetry. The telencephalon followed the same pattern as whole brain size, while the other brain regions (cerebellum, optic tectum, olfactory bulbs, and hypothalamus) were only smaller in the spring. These findings provide evidence that flexibility in brain size could underpin shifts in behavior, which could potentially subserve functions associated with differential habitat use during cold and warm seasons and allow fish to succeed in seasonally variable environments.
format	article
author	Evan J. Versteeg Timothy Fernandes Matthew M. Guzzo Frédéric Laberge Trevor Middel Mark Ridgway Bailey C. McMeans
author_facet	Evan J. Versteeg Timothy Fernandes Matthew M. Guzzo Frédéric Laberge Trevor Middel Mark Ridgway Bailey C. McMeans
author_sort	Evan J. Versteeg
title	Seasonal variation of behavior and brain size in a freshwater fish
title_short	Seasonal variation of behavior and brain size in a freshwater fish
title_full	Seasonal variation of behavior and brain size in a freshwater fish
title_fullStr	Seasonal variation of behavior and brain size in a freshwater fish
title_full_unstemmed	Seasonal variation of behavior and brain size in a freshwater fish
title_sort	seasonal variation of behavior and brain size in a freshwater fish
publisher	Wiley
publishDate	2021
url	https://doaj.org/article/bde8b883c34641328bbd3a4a2ddb8e55
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Seasonal variation of behavior and brain size in a freshwater fish

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