A5009621130- Marine animal studies overview
- Arctic and Antarctic ice dynamics
- Marine and fisheries research
- Marine and coastal plant biology
- Offshore Engineering and Technologies
- Rangeland and Wildlife Management
- Avian ecology and behavior
- Wildlife Ecology and Conservation
- Methane Hydrates and Related Phenomena
- Genetic and phenotypic traits in livestock
- Coral and Marine Ecosystems Studies
- Cephalopods and Marine Biology
- Turtle Biology and Conservation
- Winter Sports Injuries and Performance
- Cryospheric studies and observations
- Geology and Paleoclimatology Research
- Arctic and Russian Policy Studies
- Animal Vocal Communication and Behavior
- Animal Ecology and Behavior Studies
- Marine Bivalve and Aquaculture Studies
- Microplastics and Plastic Pollution
- Isotope Analysis in Ecology
- Sperm and Testicular Function
- Geological Studies and Exploration
- Effects and risks of endocrine disrupting chemicals
Universität Hamburg
2020-2022
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
2022
University of Veterinary Medicine Hannover, Foundation
2013-2019
University of Veterinary Medicine
2017
University of Göttingen
2012
Abstract The Southern Ocean surrounding Antarctica is a region that key to range of climatic and oceanographic processes with worldwide effects, characterised by high biological productivity biodiversity. Since 2013, the International Bathymetric Chart (IBCSO) has represented most comprehensive compilation bathymetry for south 60°S. Recently, IBCSO Project combined its efforts Nippon Foundation – GEBCO Seabed 2030 supporting goal mapping world’s oceans 2030. New datasets initiated second...
Abstract Effective species conservation and management requires information on distribution patterns, which is challenging for highly mobile cryptic that may be subject to multiple anthropogenic stressors across international boundaries. Understanding species–habitat relationships can improve the assessment of trends by explicitly allowing high‐resolution data habitats inform abundance estimation identification protected areas. In this study, we aggregated an unprecedented set survey a...
Abstract Fin whales ( Balaenoptera physalus quoyi ) of the Southern Hemisphere were brought to near extinction by twentieth century industrial whaling. For decades, they had all but disappeared from previously highly frequented feeding grounds in Antarctic waters. Our dedicated surveys now confirm their return ancestral grounds, gathering at Peninsula large aggregations feed. We report on results an abundance survey and present first scientific documentation fin whale Elephant Island,...
The harbour porpoise is the only cetacean species native to German waters. Since human pressures are suggested shorten their reproductive lifespan, basic knowledge on reproduction strongly required. One parameter onset of sexual maturity in female porpoises. Therefore, we investigated first signs for a period almost two decades (1990–2016). Ovaries from 111 porpoises North Sea and Baltic were examined presence morphological structure follicles, corpora lutea albicantia. Based ovarian...
ESR Endangered Species Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 32:515-524 (2017) - DOI: https://doi.org/10.3354/esr00832 Mid-summer abundance estimates of fin whales Balaenoptera physalus around South Orkney Islands and Elephant Island Sacha Viquerat, Helena Herr* Institute for Terrestrial Aquatic Wildlife Research, University Veterinary Medicine Hannover, Foundation, 25761 Büsum,...
This study investigates the distribution of Antarctic minke whales (AMW) in relation to sea ice concentration and variations therein. Information on AMW densities ice-covered parts Southern Ocean is required contextualize abundance estimates obtained from circumpolar shipboard surveys open waters, suggesting a 30% decline abundance. Conventional line-transect for density estimation are impossible regions, therefore we used icebreaker-supported helicopter obtain information along gradients...
The North Sea is one of the most heavily used shelf regions worldwide with a diversity human impacts, including shipping, pollution, fisheries, and offshore constructions. These stressors on environment can have consequences for marine organisms, such as our study species, harbor porpoise ( Phocoena phocoena ), which regarded sentinel species hence has high conservation priority in European Union (EU). As EU member states are obliged to monitor population status, present aims estimate trends...
Forest duikers (Cephalophinae) are important targets of the bushmeat trade but a reliable and efficient assessment these shy animals is often regarded as problematic. Using power analysis approach, we assessed performance three established methods (diurnal, nocturnal indirect dung surveys) in producing density estimates for blue Ogilby's duiker (Cephalophus monticola, Cephalophus ogilbyi ogilbyi) 16 km2 section primary forest, systematically sampled using line transects. Direct survey...
Abstract Marine debris is known for its ubiquitousness and harmful effects on marine life. This study the first analysis to provide information distribution of floating in German waters using aerial survey data collected between 2002 2016. During regular harbour porpoise monitoring flights, 191,167 km were covered 26,512 items recorded (average encounter rate 0.1387 items/km). Debris was encountered more often North Sea than Baltic (0.16 items/km; 0.08 The average higher offshore coastal...
The skin condition of cetaceans, including scars, scratches, and injuries, can tell us a lot about the exposure to natural anthropogenic impacts on individuals or populations (Baker, 1992; Herr et al., 2020; Kiszka 2008; Van Bressem 2006). Some features naturally accumulate over lifetime may be indicative age sex animal (MacLeod, 1998). For example, many odontocete cetacean species scars inflicted by intraspecific interaction their lifetime, with old being most heavily scarred, scarring only...
Following their near extirpation by industrial whaling of the 20 th century, population status Southern Hemisphere fin whales (SHFW) remains unknown. Systematic surveys estimating whale abundance in Ocean are not yet available. Records sightings have been collected a variety organisations over past few decades, incorporating both opportunistic data and dedicated survey data. Together, these isolated sets represent potentially valuable source information on seasonality, distribution SHFW. We...
This study presents the first long-distance tracks of fin whales (Balaenoptera physalus) equipped with satellite transmitters off Antarctic Peninsula. Southern Hemisphere were severely depleted by twentieth century industrial whaling, yet recently, they have returned to historical feeding grounds northern Peninsula, forming large aggregations in austral summers. To date, our knowledge only extended summer behaviour, while information regarding migration routes and location breeding wintering...