How old are you—Evaluation of age reading methods for the invasive round goby (Neogobius melanostomus, Pallas 1814)

Publication: Research - peer-reviewJournal article – Annual report year: 2018

DOI

  • Author: Florin, Ann-Britt

    Swedish University of Agricultural Sciences, Sweden

  • Author: Hüssy, Karin

    Section for Oceans and Arctic, National Institute of Aquatic Resources, Technical University of Denmark, Kemitorvet, 2800, Kgs. Lyngby, Denmark

  • Author: Blass, M.

    Swedish University of Agricultural Sciences, Sweden

  • Author: Oesterwind, D.

    Thünen Institute of Baltic Sea Fisheries, Germany

  • Author: Puntila, Riikka

    Finnish Environment Institute, Finland

  • Author: Ustups, D.

    Institute of Food Safety Animal Health and Environment BIOR, Latvia

  • Author: Albrecht, C.

    Thünen Institute of Baltic Sea Fisheries, Germany

  • Author: Heimbrand, Y.

    Swedish University of Agricultual Sciences, Sweden

  • Author: Knospina, E.

    Institute of Food Safety Animal Health and Environment BIOR, Latvia

  • Author: Koszarowski, K.

    University of Gdansk, Poland

  • Author: Odelström, A.

    Swedish University of Agricultual Sciences, Sweden

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In the Baltic, the first observation of the round goby (Neogobius melanostomus, Pallas 1814) was made in 1990. Within the past decade the species became invasive and spread rapidly throughout the Baltic Sea. Studies about the fishes potential impacts on resident species promote the need for an increasing knowledge of their basic stock structures such as growth rates, longevity and mortality, which all rely on accurate estimates of age. Former studies on the round goby have used several different age reading techniques. In this study, we compared three standard otolith preparation methods for ageing and present the best procedure for the invasive round goby. The results showed significant differences in age estimates of the same fish between the different preparation methods and between readers. The estimation of the first annulus, the first year, was the most problematic. The overall agreement was lowest when reading the whole otoliths while the best performance was achieved with sectioned and stained preparation method. Depending on method used the growth estimates
also differed. The results question comparability between previous studies and
highlight the importance of harmonised aging procedures for the round goby for obtaining correct estimates of population parameters such as growth rate, age at maturity, and longevity
Original languageEnglish
JournalJournal of Applied Ichthyology
Volume34
Issue number3
Pages (from-to)653-658
ISSN0175-8659
DOIs
StatePublished - 2018
CitationsWeb of Science® Times Cited: 0
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