ABSTRACT The decline of central European salmonid populations is exacerbated by global warming impacts on disease and interspecific competition. In this context, sympatric naturally reproducing populations of rainbow trout Oncorhynchus mykiss and brown trout Salmo trutta were sampled in three rivers in southern Germany where the myxozoan parasite T. bryosalmonae , the causative agent of the temperature‐associated proliferative kidney disease (PKD), is widely distributed. As expected, parasite prevalence and kidney…

The brachyuran crabs Carcinus maenas and Hemigrapsus sanguineus belong to the most ´successful´ invaders along the oceans coasts. In 2009, H. sanguineus appeared at the rocky intertidal of the island of Helgoland in the North Sea, where it encounters the native Green shore crab, C. maenas . H. sanguineus established a self-sustaining population, approaching in numbers and biomass that of C. maenas . Both species are considered to be opportunistic omnivores with variable food preferences and, thus, are potential co…

Abstract Successful conservation of cryptic species such as representatives of the genus Cobitis presents a challenge for fishery managers. Only Cobitis taenia L. is currently assumed to occur in southwest Germany, where it is classified as critically endangered. Established genetic markers and eDNA analysis identified three Cobitis species in the study area. Cobitis taenia and Cobitis elongatoides were widely distributed in the Rhine River system, primarily forming hybrid species complexes in which polyploid indi…

uploaded are raw data of eDNA and microsatellite analyses and landmarks used in morphometric analyses. For detailed information see XXX.

<p>Sedimentary ancient DNA has by now become a recognized source of information on past biodiversity change, but our understanding of its dynamics and taphonomy is still limited. While for environmental DNA in water, dedicated investigations on its provenance and degradation are being increasingly carried out, we know very little about sedimentary DNA, in particular with respect to aquatic organisms. We are therefore conducting investigations on the distribution of DNA in surface sediments and a shor…