Rapidly changing life history during invasion
This is the peer reviewed version of the following article: Bøhn, T., Sandlund, O.T., Amundsen, P.‐A. & Primicerio, R. (2004), Rapidly changing life history during invasion. Oikos, 106 , 138-150, which has been published in final form at https://doi.org/10.1111/j.0030-1299.2004.13022.x . This ar...
Published in: | Oikos |
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Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2004
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Subjects: | |
Online Access: | https://hdl.handle.net/10037/19517 https://doi.org/10.1111/j.0030-1299.2004.13022.x |
Summary: | This is the peer reviewed version of the following article: Bøhn, T., Sandlund, O.T., Amundsen, P.‐A. & Primicerio, R. (2004), Rapidly changing life history during invasion. Oikos, 106 , 138-150, which has been published in final form at https://doi.org/10.1111/j.0030-1299.2004.13022.x . This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions . The fish species vendace ( Coregonus albula ) invaded the sub‐arctic Pasvik watercourse during the second half of the 1980s, and became the dominant pelagic species in the upstream part of the watercourse within a few years. Life history traits of the pioneer population of vendace in Pasvik were recorded from 1991–2000. A rapid increase in population density in the upstream part of the watercourse was accompanied by decreased growth rates, decreased fecundity and a reduced size at first maturation. The downstream part of the watercourse showed a similar, but delayed, change in life history traits compared to the upstream part. The study documents great life history variability of a non‐native fish species entering a new environment. We discuss two co‐acting explanations for the observed patterns: (i) a density dependent response mediated by food depletion; and (ii) a pioneer strategy that allocates resources to favour reproduction at early developmental stages with a high number of offspring, trading off growth and size of offspring. |
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