Uncovering unique plasticity in life history of an endangered centenarian fish
| Autor: | Jonathan J. Spurgeon, Mark A. Pegg, Kirk D. Steffensen, Martin J. Hamel |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Population dynamics media_common.quotation_subject Population Foraging Longevity lcsh:Medicine Fresh Water Biology Environment Evolutionary ecology 010603 evolutionary biology 01 natural sciences Article Life history theory Rivers Animals lcsh:Science education Life History Traits media_common Scaphirhynchus albus Phenotypic plasticity education.field_of_study Multidisciplinary Ecology 010604 marine biology & hydrobiology lcsh:R Endangered Species Fishes biology.organism_classification Fecundity Adaptation Physiological Freshwater fish Freshwater ecology lcsh:Q |
| Zdroj: | Scientific Reports Scientific Reports, Vol 10, Iss 1, Pp 1-10 (2020) |
| ISSN: | 2045-2322 |
| Popis: | The ability to adapt to changing environments is fundamental for species persistence. Both plasticity and genetic selection are potential drivers that allow for traits to be advantageous, thus leading to increases in survival or fitness. Identifying phenotypic plasticity in life history traits of long-lived organisms can be difficult owing to high survival, long generation times, and few studies at sufficient spatial and temporal scales to elicit a plastic response within a population. To begin to understand phenotypic plasticity of a long-lived freshwater fish in response to environmental conditions, we used a long-term data set consisting of over 1,200 mark-recapture events to inform our understanding of dynamic rate functions and life history attributes. Furthermore, we used a common garden experimental approach to confirm whether changes in life history traits are in response to plasticity in the reaction norm or are genetically derived. Using these approaches, we demonstrated differences in life history traits among Pallid Sturgeon (Scaphirhynchus albus) occupying river segments of varying physical and hydrological stress. The common garden experiment corroborated plastic phenotypic expression in reaction norms for age at first maturity, longevity, fecundity, and maximum size. These growth-mediated attributes resulted in differences in overall fitness traits, where Pallid Sturgeon fecundity was greater than a tenfold difference and 3–6 times the number of life-time spawning events. Anthropogenic modifications to river form and function are likely responsible for the variation in life history attributes resulting from an increased metabolic demand for maintaining station, foraging, and migration. Collectively, our approach provided surprising insight into the capabilities of a centenarian fish to dramatically respond to a changing environment. |
| Databáze: | OpenAIRE |
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