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Feeding Ecology of and Lead Exposure in a Top Predator
Although the feeding ecology of raptors has attracted the attention of many scientists, aspects such as diet selection and foraging strategy are still poorly understood. This is particularly true for large species such as the white-tailed eagle. Representative assessments of the contribution of food sources containing toxins such as lead to raptor diets are scarce but are essential for optimising conservation efforts. This dissertation investigated the feeding ecology of white-tailed eagles to shed light on the interaction of such top predators with their environment and to improve the conservation management of this lead-exposed species. A use of complementary methods identified the most ef...
Evolutionary Biology and Conservation of Titis, Sakis and Uacaris
The first detailed collation of the evolution, ecology and conservation of some of South America's least-known, and most endangered, primates.
Stärkung und Vernetzung von Gelbbauchunken-Vorkommen in Deutschland
Die Gelbbauchunke (Bombina variegata) ist eine Leitart des Naturschutzes. In diesem Werk werden die Ergebnisse eines Projektes vorgestellt, das von 2011 bis 2018 als eines der ersten im Rahmen des Bundesprogramms Biologische Vielfalt gefördert wurde. Durchgeführt wurde das Projekt vom NABU Niedersachsen mit seinen Partnern. Durch den überregionalen Ansatz in fünf Bundesländern wurde auf großer Fläche die Gelbbauchunke gefördert. Ganz im Sinne der Nationalen Strategie zur biologischen Vielfalt haben im Projekt verschiedenste gesellschaftliche Gruppen zusammengearbeitet. Das vorliegende Werk enthält konkrete und übertragbare Naturschutzempfehlungen, Forschungserkenntnisse aus den einzelnen Projektregionen, Praxiserfahrungen zur Ex-situ-Haltung und Wiederansiedlung von Gelbbauchunken und vieles mehr.
De zeearend
Nienke Beintema vertelt het verhaal van de grootste roofvogel van de Lage Landen in ‘De zeearend’. Deze broedt sinds 2006 in ons land en is sindsdien met een spectaculaire opmars bezig. In 2020 waren er al twintig broedparen; meer dan honderd jonge zeearenden kropen in Nederland uit het ei. En de groei zet nog altijd door. Hoe is dat mogelijk, in een land waarin de natuur zo schrijnend onder druk staat? En waarom zijn we nu allemaal zo enthousiast over deze machtige vogel, terwijl we hem nog geen eeuw geleden achteloos uit de lucht schoten? Nienke Beintema ging op pad met boswachters, onderzoekers, een kunstenaar en een fotograaf om deze vragen te beantwoorden. In de Nederlandse zeearendgebieden, van Biesbosch tot Zuidlaardermeer, maar ook in Noorwegen, Duitsland en Schotland. Ze dook in boeken, artikelen en reisverslagen, op zoek naar de feiten en de mooiste anekdotes. Het boek maakt ook een uitstapje naar de zeearenden van Noord-Amerika.
Photoreceptor Optics
The above consideration indicates that at present many of the experi mental facts on PS in animals can be quantitatively explained within the limits of the "universal" photoreceptor membrane concept. Of course, existence of preferential orientation of the absorbing dipoles in the tubuli of the rhabdomeres can not be totally rejected. We hope that the concept of the "universal" photoreceptor membrane may serve as the useful instrument when dealing with newly discovered properties of visual cells so that true mechanisms of electrical and optical coupling will be searched for instead of assumptions being made on additional properties of the photoreceptor membrane in every new animal under study...
Resource Selection by Animals
We have written this book as a guide to the design and analysis of field studies of resource selection, concentrating primarily on statistical aspects of the comparison of the use and availability of resources of different types. Our intended audience is field ecologists in general and, in particular, wildlife and fisheries biologists who are attempting to measure the extent to which real animal populations are selective in their choice of food and habitat. As such, we have made no attempt to address those aspects of theoretical ecology that are concerned with how animals might choose their resources if they acted in an optimal manner. The book is based on the concept of a resource selection function (RSF), where this is a function of characteristics measured on resourceunits such that its value for a unit is proportional to the probability of that unit being used. We argue that this concept leads to a unified theory for the analysis and interpretation of data on resource selection and can replace many ad hoc statistical methods that have been used in the past.
Primate Report
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Foraging Theory
This account of the current state of foraging theory is also a valuable description of the use of optimality theory in behavioral ecology in general. Organizing and introducing the main research themes in economic analyses of animal feeding behavior, the authors analyze the empirical evidence bearing on foraging models and answer criticisms of optimality modeling. They explain the rationale for applying optimality models to the strategies and mechanics of foraging and present the basic "average-rate maximizing" models and their extensions. The work discusses new directions in foraging research: incorporating incomplete information and risk-sensitive behavior in foraging models; analyzing tra...
Hung by the Tongue
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