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Variation in developmental rates is not linked to environmental unpredictability in annual killifishes

Rowinski, Piotr K. and Sowersby, Will and Näslund, Joacim and Eckerstrom-Liedholm, Simon and Gotthard, Karl and Rogell, Björn (2021). Variation in developmental rates is not linked to environmental unpredictability in annual killifishes. Ecology and Evolution. 11 , 8027-8037
[Research article]

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Abstract

Comparative evidence suggests that adaptive plasticity may evolve as a response to predictable environmental variation. However, less attention has been placed on unpredictable environmental variation, which is considered to affect evolutionary trajectories by increasing phenotypic variation (or bet hedging). Here, we examine the occurrence of bet hedging in egg developmental rates in seven species of annual killifish that originate from a gradient of variation in precipitation rates, under three treatment incubation temperatures (21, 23, and 25 degrees C). In the wild, these species survive regular and seasonal habitat desiccation, as dormant eggs buried in the soil. At the onset of the rainy season, embryos must be sufficiently developed in order to hatch and complete their life cycle. We found substantial differences among species in both the mean and variation of egg development rates, as well as species-specific plastic responses to incubation temperature. Yet, there was no clear relationship between variation in egg development time and variation in precipitation rate (environmental predictability). The exact cause of these differences therefore remains enigmatic, possibly depending on differences in other natural environmental conditions in addition to precipitation predictability. Hence, if species-specific variances are adaptive, the relationship between development and variation in precipitation is complex and does not diverge in accordance with simple linear relationships.

Authors/Creators:Rowinski, Piotr K. and Sowersby, Will and Näslund, Joacim and Eckerstrom-Liedholm, Simon and Gotthard, Karl and Rogell, Björn
Title:Variation in developmental rates is not linked to environmental unpredictability in annual killifishes
Series Name/Journal:Ecology and Evolution
Year of publishing :2021
Volume:11
Page range:8027-8037
Number of Pages:11
Publisher:WILEY
ISSN:2045-7758
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:bet hedging, diapause, ephemeral habitats, maternal effects, plasticity, temperature response
URN:NBN:urn:nbn:se:slu:epsilon-p-111871
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-111871
Additional ID:
Type of IDID
DOI10.1002/ece3.7632
Web of Science (WoS)000649247600001
ID Code:24779
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Department of Aquatic Resources
Deposited By: SLUpub Connector
Deposited On:01 Jul 2021 11:25
Metadata Last Modified:01 Jul 2021 11:31

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