Invader population speeds up life history during colonization

We explore the long-term developments in population biology and life history during the invasion and establishment of the fish species vendace Coregonus albula in a subarctic watercourse by comparing life-history traits and molecular genetic estimates between the source and the colonist population....

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Published in:Biological invasions 2012-07, Vol.14 (7), p.1501-1513
Main Authors: Amundsen, Per-Arne, Salonen, Erno, Niva, Teuvo, Gjelland, Karl Øystein, Præbel, Kim, Sandlund, Odd Terje, Knudsen, Rune, Bøhn, Thomas
Format: Article
Language:English
Subjects:
Animal populations
Biomedical and Life Sciences
Colonization
Coregonus albula
Developmental Biology
Ecology
Fish
Founder effect
Freshwater & Marine Ecology
Genetic diversity
Genetic markers
Genotype & phenotype
Growth rate
Heterozygotes
Invasions
Invasive species
Life cycles
Life history
Life Sciences
Life span
Marinbiologi: 497
Marine biology: 497
Matematikk og Naturvitenskap: 400
Mathematics and natural science: 400
Mortality
Nonnative species
Original Paper
Physical growth
Plant Sciences
Population biology
VDP
Zoologiske og botaniske fag: 480
Zoology and botany: 480
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creator Amundsen, Per-Arne
Salonen, Erno
Niva, Teuvo
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Bøhn, Thomas
description We explore the long-term developments in population biology and life history during the invasion and establishment of the fish species vendace Coregonus albula in a subarctic watercourse by comparing life-history traits and molecular genetic estimates between the source and the colonist population. The two populations exhibited highly contrasting life-history strategies. Relative to the source population, the colonist population was characterized by slower somatic growth rates, earlier sexual maturation at smaller individual size, higher mortality rates and a shorter life span. The two populations could also be significantly discriminated by the genetic markers. Limited founder effects were detected from heterozygote deficit and reduced allelic richness in the colonist population, but both populations were associated with relatively high genetic diversity. The study reveals that the invasion into a new environment induced large changes in life-history strategy, with typical r -selected traits being more prominent in the colonist than in the source population. We discuss the mechanisms that may explain the observed life-history differences between the source and the colonist population, and argue that the accelerated life history of the colonist population represents an adaptive pioneer strategy aimed at fast population increase during colonization and establishment.
doi_str_mv 10.1007/s10530-012-0175-3
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source NORA - Norwegian Open Research Archives; Springer Nature:Jisc Collections:Springer Nature Read and Publish 2023-2025: Springer Reading List
subjects Animal populations
Biomedical and Life Sciences
Colonization
Coregonus albula
Developmental Biology
Ecology
Fish
Founder effect
Freshwater & Marine Ecology
Genetic diversity
Genetic markers
Genotype & phenotype
Growth rate
Heterozygotes
Invasions
Invasive species
Life cycles
Life history
Life Sciences
Life span
Marinbiologi: 497
Marine biology: 497
Matematikk og Naturvitenskap: 400
Mathematics and natural science: 400
Mortality
Nonnative species
Original Paper
Physical growth
Plant Sciences
Population biology
VDP
Zoologiske og botaniske fag: 480
Zoology and botany: 480
title Invader population speeds up life history during colonization
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