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Excerpt from Mitteilungen aus dem Zoologischen Museum in Hamburg, Vol. 34 XXXII (1915) als "mitteilungen aus dem Naturhistorischen (zoo logischen) Museum in Hamburg, 2. Beiheft zum Jahrbuch der Hamburgischen Wissenschaftlichen Anstalten, XXXII. Jahrgang, 1915. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Excerpt from Mitteilungen aus dem Zoologischen Museum in Hamburg, 1916, Vol. 34 Fr die Kleiderlaus des Chinesen lag die Vermutung sehr nahe, sie knnte mit der des Japaners identisch oder doch sehr nahe verwandt sein. Sie ist aber eine deutlich unterscheidbare Unterart neben P. Ham. Marginatus fahrh. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Excerpt from Mitteilungen aus dem Zoologischen Staatsinstitut und Zoologischen Museum in Hamburg, 1923, Vol. 40 Pe tso nen im allgemeinen dicht gedrängt stehend, nur geringe axiale Teile und die basalen Teile der Kolonie frei lassend, so daß die Masse des Zellulosemantels nur verhältnismäßig gering ist. Personen mehr oder weniger genau parallel mit einander und mit der Achse der Kolonie gestellt, in den axialen Teilen der Kolonie gerade gestreckt, die weiter außenstehenden mit dem Vorderende mehr \oder weniger stark gegen die Oberfläche der Kolonie hin abgebogen. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Excerpt from Mitteilungen aus dem Zoologischen Museum in Hamburg, Vol. 36: Beiheft zum Jahrbuch der Hamburgischen Wissenschaftlichen Anstalten, 1918 Meine vorliegende Arbeit ist als eine Fortsetzung der Arbeit von ehrenbaum und marukawa zu betrachten. Die gewonnenen Ergebnisse re'gten zu weiteren Forschungen nu, denn die Frage erhob sich sofort, wie weit die gewonnenen N ormen fiir das Aalwachstum Gultigkeit besitzen, namentlich fur Seen und fur Gewasser im Binnenland. Die Arbeit verfolgt aber auch weitere Ziele. Bereits von ehrenbaum wurde eine Untersuchung uber das zahlenmaige Verhaltnis der Geschlechter in der Unterelbe und anderen Gewassern eingeleitet, deren Veroffentlichung aufgeschoben wurde, um dergleichen Untersuchungen an einem groeren Material ausfuhren zu konnen und eine genugende Sicherheit der wichtigen Resultate zu gewinnen. Diese Arbeit ist nunmehr durchgefuhrt, und die interessanten Resultate werden in dieser Abhandlung zum Teil veroffentlicht. In Zusammenhang hiermit steht eine Untersuchung uber den Satzaal und das Verhaltnis der Geschlechter in den Satzaalfangen, das fur die Praxis von groer Bedeutung ist. Mit letzteren Fragen, zu deren Losung noch weiteres Material beschafft und verarbeitet wird, wird sich eine spatere Veroffentlichung eingehender zu befassen haben. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Excerpt from Beiheft zum Jahrbuch der Hamburgischen Wissenschaftlichen Anstalten, 1920, Vol. 38: Mitteilungen aus dem Zoologischen Staatsinstitut und Zoologischen Museum im HamburgIm folgenden gebe ich eine Ubersicht des untersuchten Materials. Zunachst dessen mit bestimmten Fundorten innerhalb der Sargassosee. Es ist so angeordnet, da ich auf der von krummel (1891) gezeichneten Karte (fig. 1) von der auersten Zone (i) zur innersten (iv) fortschreite und innerhalb jeder im W bei 30 n.br. Beginnend im Sinne des Uhr zeigers herumgehe. Darauf folgt das ubrige Material von der Ausreise der "deutschland, zunachst Sargassum-ohne bestimmten Fundort, danach das Material. Welches auerhalb der Sargassosee gewonnen wurde.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
The present catalog provides a compilation of all supra- and (infra-) specific taxa of extant and fossil Valvatidae (Ectobranchia), a group of freshwater operculate snails (Gastropoda, Heterobranchia). Taxa initially described in this family and bsequently classified in other families (in particular Hydrobiidae and Planorbidae, but among others also larval shells of trichopteran insects) as well as names due to errors or misspellings are likewise included. For each taxon the full original reference and the ype locality (and type horizon in fossils) is provided. Remarks on nomenclatorical problems and possible solutions are added if necessary. As a novelty the extensive reference list is as far as possible directly linked to the internet source (digital view or pdf-download) of the respective papers to facilitate future taxonomic research.
Invasive non-native species are a major threat to global biodiversity. Often introduced accidentally through international travel or trade, they invade and colonize new habitats, often with devastating consequences for the local flora and fauna. Their environmental impacts can range from damage to resource production (e.g. agriculture and forestry) and infrastructure (e.g. buildings, road and water supply), to human health. They consequently can have major economic impacts. It is a priority to prevent their introduction and spread, as well as to control them. Freshwater ecosystems are particularly at risk from invasions and are landscape corridors that facilitate the spread of invasives. This book reviews the current state of knowledge of the most notable global invasive freshwater species or groups, based on their severity of economic impact, geographic distribution outside of their native range, extent of research, and recognition of the ecological severity of the impact of the species by the IUCN. As well as some of the very well-known species, the book also covers some invasives that are emerging as serious threats. Examples covered include a range of aquatic and riparian plants, insects, molluscs, crustacea, fish, amphibians, reptiles and mammals, as well as some major pathogens of aquatic organisms. The book also includes overview chapters synthesizing the ecological impact of invasive species in fresh water and summarizing practical implications for the management of rivers and other freshwater habitats.
This monograph contents a review of the beetle family Trogossitidae (Cleroidea). The worldwide distributed family includes 55 recent and 10 extinct genera with about 600 species that are classified within 3 subfamilies and 12 tribes. In spite of fewer number of species, Trogossitidae is morphologically and ecologically extremely diversified. There are four-eyed predators that fly, run and even jump around swiftly in forest clearings to contrast with slow-moving, fungivorous species that dwell under the bark of old trees. There are also species that squat on flowers to feed on pollen grains as well as minute creatures that have been extracted from forest litter. Brief descriptions of all genera as well as keys to all higher taxa are provided. All known species and subspecies are listed, together with complete taxonomic references back to 1910, the date of issue of their last catalogue. The work includes maps of distribution of all genera, colour photographs of generic representatives, SEM photographs and remarks on a phylogeny of particular taxa.