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    German Development Cooperation and the World Commission on Dams

    More than 10 years after the German government welcomed the recommendations of the World Commission on Dams (WCD) and made them the yardstick for all dam-related activities in its development cooperation, this...

    Kirsten Nyman, Klaus Horstmann, Christiane Rudolph in Evolution of Dam Policies (2014)

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    Article

    Die Energiebilanz der Waldameisen (Formica polyctena Forster) in einem Eichenwald

    Ein mittelgroßes Volk vonFormica polyctena Förster, das durch eine Frequenz von 10 auslaufenden Arbeiterinnen pro sec bei 15°C charakterisiert ist, besteht aus 1 070 Königinnen und 838 000 Arbeiterinnen (davon 43...

    Klaus Horstmann in Insectes Sociaux (1982)

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    Article

    Über die Duftspur-Orientierung bei Waldameisen (Formica polyctena Foerster)

    Auslaufende Außendienstarbeiterinnen vonFormica polyctena können Duftspuren folgen, die von den mit gefüllten Kröpfen von einer Futterquelle zurückkehrenden Arbeiterinnen desselben oder eines anderen Volkes geleg...

    Klaus Horstmann in Insectes Sociaux (1976)

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    Article

    Zur Regulation des Beuteeintrags bei Waldameisen (Formica polyctena Foerster)

    In entire laboratory colonies of wood ants a withdrawal of prey results in a rise of the readiness for fight of the outdoor workers, and, after a new offering of prey, in an increased carrying in, whereby the ...

    Klaus Horstmann in Oecologia (1975)

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    Article

    Untersuchungen über den Nahrungserwerb der Waldameisen (Formica polyctena foerster) im Eichenwald

    During a year, the workers of a medium-sized nest of red wood ants, which is characterized by a territory of 0.27 ha and a number of 10 workers running out per sec at 15°C, collected on average 6.1 million pre...

    Klaus Horstmann in Oecologia (1974)

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    Article

    Untersuchungen über den Nahrungserwerb der Waldameisen (Formica polyctena Foerster) im Eichenwald

    The amount of prey brought into the nest attains a maximum in May, which in the years of an outbreak of Tortrix viridana is not much higher than during the times of latency of this insect, and depends at least pa...

    Klaus Horstmann in Oecologia (1972)

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    Article

    Untersuchungen über den Nahrungserwerb der Waldameisen (Formica polyctena Foerster) im Eichenwald

    The number of ants running out of or into the nest depends mainly on temperature (with a maximum near 23° C), and to a small degree on day-time. Disturbing factors are darkness and rainfall.

    Klaus Horstmann in Oecologia (1970)

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    Article

    Ökologische Untersuchungen über die Ichneumoniden (Hymenoptera) der Nordseeküste Schleswig-Holsteins

    On the Western Coast of Schleswig-Holstein 25686 ichneumon flies belonging to 251 species were caught in traps or reared from their hosts (43 species). They parasitise spider egg cocoons (45% of individuals), ...

    Klaus Horstmann in Oecologia (1970)

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    Article

    Revision einiger arten der gattungenMesostenus Gravenhorst,Agrothereutes Foerster undIschnus Gravenhorst [Hymenoptera, Ichneumonidae]

    Type revisions and descriptions of the following species are given:Mesostenus obnoxius Gravenhorst (syn. nov. subovalis Thomson,syn. nov. subcircularis Thomson),Mesostenus helveticae spec. nov.,Agrothereutes fumi...

    Klaus Horstmann in Entomophaga (1968)