Files and links (2)
Published (Version of Record)CC BY V4.0, Open Access
Journal article
Ontogenetic shifts in brain scaling reflect behavioral changes in the life cycle of the pouched lamprey Geotria australis
Frontiers in Neuroscience, Vol.9, Article 00251
2015
Abstract
Very few studies have described brain scaling in vertebrates throughout ontogeny and none in lampreys, one of the two surviving groups of the early agnathan (jawless) stage in vertebrate evolution. The life cycle of anadromous parasitic lampreys comprises two divergent trophic phases, firstly filter-feeding as larvae in freshwater and secondly parasitism as adults in the sea, with the transition marked by a radical metamorphosis. We characterized the growth of the brain during the life cycle of the pouched lamprey Geotria australis, an anadromous parasitic lamprey, focusing on the scaling between brain and body during ontogeny and testing the hypothesis that the vast transitions in behavior and environment are reflected in differences in the scaling and relative size of the major brain subdivisions throughout life. The body and brain mass and the volume of six brain structures of G. australis, representing six points of the life cycle, were recorded, ranging from the early larval stage to the final stage of spawning and death. Brain mass does not increase linearly with body mass during the ontogeny of G. australis. During metamorphosis, brain mass increases markedly, even though the body mass does not increase, reflecting an overall growth of the brain, with particularly large increases in the volume of the optic tectum and other visual areas of the brain and, to a lesser extent, the olfactory bulbs. These results are consistent with the conclusions that ammocoetes rely predominantly on non-visual and chemosensory signals, while adults rely on both visual and olfactory cues.
Details
- Title
- Ontogenetic shifts in brain scaling reflect behavioral changes in the life cycle of the pouched lamprey Geotria australis
- Authors/Creators
- C.A. Salas (Author/Creator) - The University of Western AustraliaK.E. Yopak (Author/Creator) - The University of Western AustraliaR.E. Warrington (Author/Creator) - The University of Western AustraliaN.S. Hart (Author/Creator) - The University of Western AustraliaI.C. Potter (Author/Creator) - Murdoch UniversityS.P. Collin (Author/Creator) - The University of Western Australia
- Publication Details
- Frontiers in Neuroscience, Vol.9, Article 00251
- Publisher
- Frontiers
- Identifiers
- 991005540074907891
- Copyright
- © 2015 Salas, Yopak, Warrington, Hart, Potter and Collin.
- Murdoch Affiliation
- Centre for Fish and Fisheries Research; School of Veterinary and Life Sciences
- Language
- English
- Resource Type
- Journal article
UN Sustainable Development Goals (SDGs)
This output has contributed to the advancement of the following goals:
Source: InCites
Metrics
133 File views/ downloads
51 Record Views
InCites Highlights
These are selected metrics from InCites Benchmarking & Analytics tool, related to this output
- Collaboration types
- Domestic collaboration
- Citation topics
- 8 Earth Sciences
- 8.93 Archaeology
- 8.93.805 Mammalia
- Web Of Science research areas
- Neurosciences
- ESI research areas
- Neuroscience & Behavior