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2231 results.
Analysis of uroliths of guinea pigs
Harnsteinanalyse bei Meerschweinchen
Project Investigators: Reuschel; Fehr; Pees
Duration: Beginning 2014 until End 2022
Project Details:
Harnsteine kommen bei Meerschweinchen häufig vor und stellen einen regelmäßigen Vorstellungsgrund für Meerschweinchen in der tierärztlichen Praxis dar. Harnsteine beim Meerschweinchen treten bei Meerschweinchen meistens in der Blase oder der Urethra bei weiblichen Tieren auf, seltener liegt eine Urolithiasis in den Ureteren vor. Über die Zusammensetzung von Harnsteinen aus unterschiedlichen Lokalisationen liegen beim Meerschweinchen noch keine Studien vor. Daher werden im Rahmen des Projekts Harnsteinanalysen von Meerschweinchen ausgewertet, die in Zusammenarbeit mit dem Harnsteinanalysezentrum Bonn analysiert wurden.
Cooperation Partners:

Kooperationspartner: Harnsteinanalysezentrum Bonn, Prof. Dr. Albrecht Hesse

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Consortium - cat Genome project
Consortium - Katzengenomprojekt
Project Investigators: Prof. Dr. O. Distl
Duration: September 2014 until End 2022
Project Details:
In dem Konsortium werden die Genome der Familie Felidae aufgeklärt. Ziele sind die Verbesserung der Referenzgenomsequenz sowie die Charakterisierung der Diversität von Haus- und Wildkatzenarten.
Results:

Genova et al.,First genome-wide CNV mapping in FELIS CATUS using next generation sequencing data.BMC Genomics. 2018 Dec 10;19(1):895. doi: 10.1186/s12864-018-5297-2.

Cooperation Partners:

Tierkliniken

Zoos

Tiergärten

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Acoustic communication and parasite infections in an endangered folivorous primate, the proboscis monkey (Nasalis larvatus, von Wurmb 1787)
Akustische Kommunikation und Parasiteninfektionen bei einem bedrohten folivoren Primaten, dem Nasenaffen (Nasalis larvatus, von Wurmb 1787)
Project Investigators: Apl. Prof. Dr. Ute Radespiel; Prof. Dr. Christina Strube; Dr. Marina Scheumann
Duration: 2011 until 2022
Funding: DAAD, Konrad-Adenauer-Stiftung and external through collaboration
Project Details:
The proboscis monkey (Nasalis larvatus) is a large-bodied folivorous primate, forming harem and bachelor groups in lowland tropical rainforests in Borneo. Due to anthropogenic habitat loss and fragmentation, this primate species is highly endangered, and a better knowledge of their behavior and health status may improve their conservation and management. The goal of this project is to study its superficially known vocal signalling system and its intestinal parasite load to evaluate negative consequences of habitat fragmentation and the zoonotic risks that need to be considered when designing effective management programs. We investigate and compare those aspects in one-male (harem) and all-male (bachelor) groups in the Lower Kinabatangan Wildlife Sanctuary, Borneo, as well as in the Labuk Bay Sanctuary to study the role of vocalizations in governing spacing and cohesion. Furthermore, we assess intestinal parasite communities to link them to social grouping pattern and communication and to get insight into their significance for zoonotic diseases.
Results:

e.g.:

Scheumann, M., Röper, K. M., Nathan, S. K., & Goossens, B. (2022): Third-party vocal intervention in the proboscis monkey (Nasalis larvatus). Int. J. Primatol., 43: 1-14. https://doi.org/10.1007/s10764-021-00273-9

 

Klaus, A.; Strube, C.; Röper, K. M.; Radespiel, U.; Schaarschmidt, F.; Nathan, S.; Goossens, B.; Zimmermann, E.(2018): Fecal parasite risk in the endangered proboscis monkey is higher in an anthropogenically managed forest environment compared to a riparian rain forest in Sabah, Borneo in PlosOne 13(4). https:// doi.org/10.1371/journal.pone.0195584

 

Klaus, A.; Zimmermann, E.; Röper, K.M.; Radespiel, U.; Nathan, S.; Goossens, B.; Strube, C. (2017): Co-infection patterns of intestinal parasites in arboreal primates (proboscis monkeys, Nasalis larvatus)in Borneo.Int. Journ. for Parasitology: Parasites and Wildlife. 6(3): 320-329. https.//10.1016/j.ijppaw.2017.09.005

 

Röper, K.M.; Scheumann, M.; Wiechert, A.B.; Nathan, S.; Goossens, B.; Owren, M.J.; Zimmermann, E. (2014): Vocal acoustics in the endangered proboscis monkey (Nasalis larvatus). Am. J. Primatol. 76 (2): 192-201. https://doi.org/10.1002/ajp.22221

Cooperation Partners:

Dr. Benoit Goossens, Danau Girang Field Center, Malaysia, and Cardiff University, GB

Dr. Ikki Matsuda, Primate Research Center, Inumyama, Japan

Dipl. Biol. Kathrin M. Röper, Zoo Hannover

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Association studies between polymorphisms of equine candidate genes and fertility in stallions and mares of Hannoverian Warmblood
Assoziationsstudie zwischen Polymorphismen von equinen Kandidatengenen und der Fruchtbarkeit von Hengst und Stute beim Hannoverschen Warmblutpferd
Project Investigators: Prof Dr Ottmar Distl; Prof Dr Harald Sieme
Duration: Beginning 2007 until End 2022
Project Details:
Funktionelle Kandidatengene, für die über Expressions- und Proteinanalysen beim Pferd oder bei anderen Tierarten und Mensch ein Einfluss auf die Befruchtungsrate nachgewiesen wurde, sollen als Kandidaten für die Fruchtbarkeit bei Hengsten und Stuten des Hannoverschen Warmbluts untersucht werden. Im Rahmen der Untersuchung sollen für diese Kandidatengene SNP-Marker mit signifikantem Einfluss auf die Reproduktionsleistung von Hengsten und Stuten entwickelt werden. Die Reproduktionsleistung der Pferde wird über die Trächtigkeitsrate pro Rosse und Decksaison erfasst. Dazu werden in Zusammenarbeit mit dem Niedersächsischen Landgestüt in Celle die Deckregister-Daten erhoben und ausgewertet. Die Auswertung erfolgt über Assoziationsanalysen für die Kandidatengene mit den Fruchtbarkeitsparametern.
Cooperation Partners:

Niedersächsisches Landgestüt Celle

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Phylogeography and ecological diversification of the genus Oophaga in Central and South America
Phylogeographie und ökologische Diversifizierung der Gattung Oophaga in Zentral- und Südamerika
Project Investigators: Prof. Dr. Heike Pröhl
Duration: Mid 2005 until End 2022
Funding: DAAD, DGHT
Project Details:
Die Pfeilgiftfrösche der Gattung Oophaga zeichnen sich durch ein komplexes Territorial-, Paarungs- und Brutpflegeverhalten aus. Aus diesem Grund sind sie Modellobjekte in vielen Studien zur Beantwortung evolutionsbiologischer Studien. Weiterhin sind die meisten dieser Arten polymorph, d.h. sie unterschieden sich in ihren bioakustischen Signalen, Farbmustern und anderen morphologischen Variablen zwischen den Populationen. Auf Grund dessen ist es häufig schwierig Arten klar abzugrenzen. Das Ziel dieses Projektes ist eine molekular-genetische Studie durchzuführen, in der Arten genetisch eindeutig zugeordnet werden können. Sobald dieses erfolgt ist, folgen weitere Untersuchungen, um herauszufinden in wie weit die Arten sich in ihren ökologischen Ansprüchen und ihrem Verhalten unterscheiden. Das Ziel des Projektes ist es Artbildungsmechamismen besser zu verstehen.
Results:

Galindo Uribe D, Sunyer J, Hauswaldt S, Amezquita A, Pröhl H, Vences M (2014) Color and pattern variation and Pleistocene phylogeographic origin of the strawberry poison frog, Oophaga pumilio, in Nicaragua. Salamandra, 50: 225-235

Brusa O, Bellati A, Meuche I, Mundy NI, Pröhl H (2013) Divergent evolution in the polymorphic granular poison-dart frog, Oophaga granulifera: genetics, colouration, advertisement calls and morphology. J Biogeogr 40:394-408

Hauswaldt JS, Ludewig A-K, Vences M, Pröhl H (2011) Widespread co-occurrence of divergent mitochondrial haplotype lineages in a Central American species of poison frog (Oophaga pumilio). J Biogeog 38: 711-726

Hagemann S, Pröhl H (2007) Mitochondrial paraphyly in a polymorphic poison frog species (Dendrobatidae; D. pumilio). Molecular Phylogenetics & Evolution 45: 740-747

Cooperation Partners:

Prof. Dr. Adolfo Amezquita, Universidad de los Andes

Dr. Diana Galindo, Universidad de los Andes

Prof. Dr. Miguel Vences, TU Braunschweig

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Examinations on epilepsy in the dog
Untersuchungen zur Epilepsie des Hundes
Project Investigators: Prof. Dr. Andrea Tipold; Marisa Wesolowski; Lea Monneret; Anna Knebel; Enrice Hünerfauth
Duration: Beginning 2002 until End 2022
Funding: Teile des Projektes Industrie, Gesellschaft für Kynologische Forschung, BMBF (Lichtenberg-Stipendium), Bruns-Stiftung, GKF, Boehringer-Ingelheim, 110.000 EUR
Project Details:
Hunde mit Krampfanfällen machen ungefähr 10% des neurologischen Patientengutes aus. Im Rahmen dieser Projekte wird versucht, die Diagnostik und Therapie zu verbessern. Magnetresonanzuntersuchungen (MRT) und spezielle EEG-Techniken werden derzeit auf ihre Bedeutung für die Diagnostik in der Praxis evaluiert. Neue Anästhesieprotokolle werden für die EEG Diagnostik untersucht. Die Häufigkeit der Entwicklung von Krampfanfällen nach Trauma soll bei Hund und Katze ermittelt werden. In einer multizentrischen Studie wird die Wirksamkeit neuer antikovulsiv wirkenden Substanzen bzw. neuer Therapiestrategien getestet. Der Einfluss von Endocannabinoiden auf den Krankheitsverlauf wird studiert. Biomarker für die Epileptogenese in Liquor cerebrospinalis und Serum/MRT werden gesucht. Derzeit wird die Th17 Antwort näher beleuchtet, bzw. werden volumetrische Untersuchungen durchgeführt und Therapiemassnahmen überprüft. In einer Studie in Zusammenarbeit mit dem Zuchtverband wird der Phänotyp der idiopathischen Epilepsie des Hundes beim großen Schweizer Sennenhund angesehen.
Cooperation Partners:

multizentrische Studien - mehrere Kleintierpraxen, Universität Bern, Universität München

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Plenty of fish?-evaluation of the feeding behavior of harbor seals using a high-resolution multi-sensor underwater camera
Fisch satt?-Evaluierung des Fressverhaltens von Seehunden mittels hochauflösender Multi-Sensor-Unterwasserkamera
Project Investigators: Prof. Prof. h. c. Dr. Ursula Siebert; Dr. Abbo van Neer
Duration: January 2021 until December 2021
Funding: Nationalparkstiftung Schleswig-Holstein, 22.500 EUR
Project Details:
The native harbor seal population has been severely depleted in the past, but rebounded after the end of hunting in the 1970s. Two seal distemper epidemics in 1988 and 2002 and an influenza epidemic drastically reduced the seal population in the Wadden Sea within a very short time. However, the population recovered each time, so that currently there are an estimated 40800 living in the Wadden Sea of the Netherlands, Germany and Denmark.
Despite the high profile of this species, some aspects of harbor seal ecology, such as precise movement patterns and habitat use in the Wadden Sea National Park and adjacent waters, as well as information on feeding ecology, are poorly studied. The few studies available suggest that harbor seals do make extended hunting excursions into the open North Sea. However, the ecological relevance of these excursions and the detailed, spatiotemporal resolution of foraging activity are based on purely theoretical approaches. Furthermore, it is not clear which prey organisms and prey size the seals prefer on their hunting trips and whether they show specific hunting tactics depending on prey size.
Therefore, this project aims to fill gaps in our knowledge about where, how often and what exactly seals feed on in the German North Sea.
A problem in this context is that seals spend most of their lives in the water, where it is very difficult to observe their movements. In this context, telemetry - i.e., the tagging of animals with small electronic devices - is an important method to obtain knowledge about habitat use and behavior of the animals. However, in terms of determining foraging and food acquisition, telemetry has a large element of uncertainty. While sensors can provide high-resolution movement data (geographic position, dive depth, dive length, dive distance, acceleration), a characterization of foraging behavior is usually based on a subjective assessment of theoretical assumptions. A direct observation of the feeding behavior can only be achieved by a camera directly on the animal. In the present project, seals will therefore be equipped with a special underwater camera ("CATS-Cam"). In the future, the knowledge gained can also serve as a basis for the optimization of management concepts, as well as for further studies, for example to validate data from conventionally used telemetry devices. Furthermore, the recorded videos can be used for public relations and environmental education.
Results:

In the present project, two seals were caught and equipped with special underwater cameras ("CATS-Cam"). As expected, the cameras detached from the animals after a few days and the stored video files could be read out and analysed. A first analysis showed that the concept was suitable for the study purposes. A total of 495 videos (total length of 21.8 hours) were recorded.

Further investigations will be carried out in the future to optimise the method, so that more data can be recorded and movement patterns that could be identified from the existing videos can be used as a template for further identifications in the movement data. Also, problems such as poor lighting conditions caused by high concentrations of suspended matter in the water are to be avoided through modifications to the device.

In the future, the further development of this method should also serve as a basis for optimising management concepts, for example to validate data from conventionally used telemetry devices.

https://www.tiho-hannover.de/universitaet/aktuelles-veroeffentlichungen/pressemitteilungen/detail/seehunden-ueber-die-schulter-schauen

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Raccoon dog and raccoon - neozoa on the advance in S.-H.: Studies on the influence on native animal species and as reservoir of infectious diseases
Marderhund und Waschbär - Neozoen auf dem Vormarsch in S.-H.: Untersuchungen zum Einfluss auf heimische Tierarten und als Reservoir von Infektionskrankheiten
Project Investigators: Prof. Prof. h. c. Dr. Ursula Siebert; Jana Christina Klink
Duration: January 2021 until December 2021
Funding: Ministerium für Energiewende,Landwirtschaft, Umwelt, Natur und Digitalisierung des Landes Schleswig-Holstein, 53.000 EUR
Project Details:
Originally situated in east asia the racoon dog was introduced 1928 as a fur animal in the former soviet union. Since then the racoon dog spread continously west and inhabited new areas. In the late 1990 the first reproduction of racoon dogs in Schleswig- Holstein was recorded.

1927 racoons were released in the state of Hessen, in the following years other racoon dogs were set free or escaped form captivity in different parts of Germany. From this time on a free roaming population established. In 1975 the first reproduction of racoons was recorded in Schleswig- Holstein.

In our project we want to analyse the influence and the risk of these alien species on our native fauna. Therefore we want to asses the health status, especially the occurance of zoonotic and infectious diseases and the nutrition of the animals.

Shot animals or animals found dead are getting dissected at the institute for terrestrial and aquatic wildlife research of the TiHo Hannover. Samples for bacteriological, virological and parasitological diagnostics are taken and stomach content analysis and age determination is taking place. Based on the first results follow- up studies on the influence on native animal species and as a result of those a future long-term management can be developed
Results:

Malicious Mites?Sarcoptes scabiei in Raccoon Dogs (Nyctereutes procyonoides) in Schleswig-Holstein, Germany

https://www.mdpi.com/2076-0817/12/12/1379

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Continuation of the pilot study concerning the behavior in time and space of predator and prey species in Schleswig-Holstein
Fortführung der Pilotstudie zum vergleichenden Raum-Zeit-Verhalten von Prädatoren und ihren Beutetieren in S.-H. am Beispiel Fuchs und Hase
Project Investigators: Prof. Prof. h. c. Dr. Ursula Siebert; Lotte Caecilia Striewe
Duration: January 2021 until December 2021
Funding: Ministerium für Energiewende,Landwirtschaft, Umwelt, Natur und Digitalisierung des Landes Schleswig-Holstein, 20.000 EUR
Project Details:
Especially during sensitive life stages, i. e. the upbringing of offspring, predators can have a negative influence on their prey. This pilot study therefore aims to record and compare the spatiotemporal behavior of predator and their prey species. One focus hereby is the relevance of permanent landscape structures such as hedges as well as additionally created elements such as wildflower strips or fallow land.
Predators like the red fox (Vulpes vulpes) and the non-indigenous racoon dog (Nyctereutes procyonoides) as well as the European hare (Lepus europaeus) as a prey species occur in Schleswig-Holstein. To conduct the pilot study, individuals of these species are equipped with tags automatically collecting GPS data. Furthermore, the tags record spatial movements of the individual on three axes. With the received data, individual home ranges, nightly activities, and daily resting areas can be analysed. Eventually, captured patterns can be compared to identify overlaps between predators and their prey as well as the influence of structural landscape elements.
Results:

Abschlußbericht

https://www.tiho-hannover.de/fileadmin/57_79_terr_aqua_Wildtierforschung/79_Buesum/downloads/Berichte/2021_Praedatorenbericht.pdf

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Analysis for abundance estimates based on aerial survey data of harbour porpoises in the five Danish Natura 2000 Sites in the southern North Sea and Skagerrak-2020
Analysis for abundance estimates based on aerial survey data of harbour porpoises in the five Danish Natura 2000 Sites in the southern North Sea and Skagerrak-2020
Project Investigators: Prof. Prof. h. c. Dr. Ursula Siebert; Dominik Nachtsheim
Duration: February 2021 until May 2021
Funding: Aarhus University, DK, 4.451 EUR
Project Details:
On behalf of Aarhus University (Denmark), data on the abundance and distribution of marine mammals has been collected annually since 2012. Five Natura 2000 sites in the Danish North Sea and Skagerrak were surveyed in 2020. The main target species was the harbour porpoise (Phocoena phocoena). The flight surveys were conducted by Aarhus University and followed the line transect survey method. ITAW was commissioned to quality assure and evaluate the data collected. For the individual study areas, densities and abundances of harbour porpoises could be estimated and the inaccuracies (95% confidence intervals and coefficient of variation (CV)) associated with the estimation were determined. The processed data and results were submitted to the client.
Results:

Report of the Aarhus University (Denmark)

Videnskabelig rapport fra DCE - Nationalt Center for Miljø og Energi nr. 475

https://dce2.au.dk/pub/SR475.pdf

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