Choosy Amphipods

idw – Informationsdienst Wissenschaft

Nachrichten, Termine, Experten

Grafik: idw-Logo
Thema Corona

idw-Abo
Science Video Project



Teilen: 
07.02.2019 09:32

Choosy Amphipods

Dr. Anne Hardy Public Relations und Kommunikation
Goethe-Universität Frankfurt am Main

    Amphipods of the species Gammarus roeselii guard their chosen mates, often carrying them with them for days and defending them against potential rivals. This behaviour requires a lot of time and energy, so that the males make their choice with care. Scientists at Goethe University have now investigated under which circumstances males are prepared to revise their decision.

    Frankfurt. In their study, Carolin Sommer-Trembo, Konrad Lipkowski and their two colleagues compare the behaviour of Gammarus males from two populations with very different densities. They collected test animals from two neighbouring areas and let them acclimate for a few days in large aquariums. During this time, pairs formed, with the males firmly grasping the female and not letting her go before fertilization (amplectant pair).

    In the next step, the amplectant pairs were carefully separated from one another, and each male was offered another (morphologically similar) female, one they had not previously selected of their own accord. The males from the populations with a very low density grasped the female within a short period. As expected, they were not particularly choosy, since they seldom encountered females in their natural environment and therefore had to seize the opportunity immediately.

    The males from the population consisting of many individuals spent a significantly longer period searching through their small test basin for an alternative (hopefully better) female, before accepting the female selected by the researchers. “Often, an amplectant pair didn’t even come about,” Carolin Sommer reports. “If, after separation, we returned the female the male itself had selected, the male accepted it just as quickly as the males from the other population accepted a new female.”

    The amphipods, which are only millimetres-long, are therefore definitely choosy, with the degree of choosiness depending on the population density in their natural environments. “The population density has enormous influence on whether the male can afford to take a closer look at his mate,” concludes Konrad Lipkowski.


    Wissenschaftliche Ansprechpartner:

    Konrad Lipkowski, Institute for Ecology, Evolution and Diversity, Faculty of Biosciences, Riedberg Campus, Tel.: +49 (69) 798- 42211, lipkowski@bio.uni-frankfurt.de.
    Dr. Carolin Sommer-Trembo, Zoological Institute, University of Basel, +41 (0) 61 207 59 05, sommer-trembo@gmx.de


    Originalpublikation:

    Lipkowski K, Plath M, Klaus S, Sommer-Trembo C. Population density affects male mate choosiness and morphology in the mate-guarding amphipod Gammarus roeselii (Crustacea: Amphipoda). Biological Journal of the Linnéan Society. https://dx.doi.org/10.1093/biolinnean/bly201


    Merkmale dieser Pressemitteilung:
    Journalisten
    Biologie
    überregional
    Forschungsergebnisse
    Englisch


    Hilfe

    Die Suche / Erweiterte Suche im idw-Archiv
    Verknüpfungen

    Sie können Suchbegriffe mit und, oder und / oder nicht verknüpfen, z. B. Philo nicht logie.

    Klammern

    Verknüpfungen können Sie mit Klammern voneinander trennen, z. B. (Philo nicht logie) oder (Psycho und logie).

    Wortgruppen

    Zusammenhängende Worte werden als Wortgruppe gesucht, wenn Sie sie in Anführungsstriche setzen, z. B. „Bundesrepublik Deutschland“.

    Auswahlkriterien

    Die Erweiterte Suche können Sie auch nutzen, ohne Suchbegriffe einzugeben. Sie orientiert sich dann an den Kriterien, die Sie ausgewählt haben (z. B. nach dem Land oder dem Sachgebiet).

    Haben Sie in einer Kategorie kein Kriterium ausgewählt, wird die gesamte Kategorie durchsucht (z.B. alle Sachgebiete oder alle Länder).

    Cookies optimieren die Bereitstellung unserer Dienste. Durch das Weitersurfen auf idw-online.de erklären Sie sich mit der Verwendung von Cookies einverstanden. Datenschutzerklärung
    Okay