Algal blooms decrease care but increase egg survival in a fish with paternal care

M Järvenpää, Kai Lindström

    Research output: Contribution to journalArticleScientificpeer-review

    7 Citations (Scopus)


    Human-induced eutrophication, resulting in algal blooms and increased water turbidity, is an alarming problem in aquatic systems. Here, we experimentally tested the impact of algal turbidity on parental care, egg fanning, and time in the nest, in the sand goby, Pomatoschistus minutus, a fish with uniparental male care. We allowed males to care for their eggs in either clear water or water made turbid by planktonic algae. In the early brood cycle, males fanned their eggs less in turbid than in clear water, but this difference disappeared later. Despite decreased care, egg survival was higher in turbid conditions, indicating that early fanning may partly be redundant for egg survival and perhaps used more as courtship. Males also spent more time out of their nest in turbid water, perhaps as a means to encounter additional females under conditions of low visibility.
    Original languageUndefined/Unknown
    Pages (from-to)2023–2028
    Number of pages6
    JournalBehavioral Ecology and Sociobiology
    Issue number11
    Publication statusPublished - 2011
    MoE publication typeA1 Journal article-refereed


    • Eutrophication
    • Fanning
    • Mating effort
    • Pomatoschistus minutus
    • Reproductive success
    • Sexual selection
    • Turbidity

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