Volker B. Deecke
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View article: Multi-tool monitoring: integrating non-invasive methods to assess vertebrate diversity and trophic complexity in terrestrial rewilding
Multi-tool monitoring: integrating non-invasive methods to assess vertebrate diversity and trophic complexity in terrestrial rewilding Open
Rewilding, the restoration of natural processes to create self-sustaining and resilient ecosystems, is an increasingly popular conservation approach. However, outcomes are often unpredictable, and effective ecological monitoring is critica…
View article: Variation in the diversity of Sotalia (Cetacea:Delphinidae) dolphin whistle repertoires at a continental scale
Variation in the diversity of Sotalia (Cetacea:Delphinidae) dolphin whistle repertoires at a continental scale Open
1. While cetaceans are known to produce large and complex acoustic repertoires, the challenges of exhaustively sampling sounds at sea and counting relevant signals has precluded an understanding of their true repertoire diversity. 2. Here …
View article: Call type repertoire of killer whales (<i>Orcinus orca</i>) in Iceland and its variation across regions
Call type repertoire of killer whales (<i>Orcinus orca</i>) in Iceland and its variation across regions Open
Killer whales ( Orcinus orca ) have group‐specific call repertoires that can be used to track groups and populations using passive acoustic monitoring. To provide a detailed description of the Icelandic killer whale repertoire and its vari…
View article: Abundance, range and movements of a feeding aggregation of gray whales (Eschrichtius robustus) from California to southeastern Alaska in 1998
Abundance, range and movements of a feeding aggregation of gray whales (Eschrichtius robustus) from California to southeastern Alaska in 1998 Open
This study documents the range, abundance and movements of a feeding aggregation of gray whales (Eschrichtius robustus) in the Pacific northwest. Identification photographs were collected by eight collaborating organisations between March …
View article: Divergent foraging strategies between populations of sympatric matrilineal killer whales
Divergent foraging strategies between populations of sympatric matrilineal killer whales Open
In cooperative species, human-induced rapid environmental change may threaten cost–benefit tradeoffs of group behavioral strategies that evolved in past environments. Capacity for behavioral flexibility can increase population viability in…
View article: Effects of climate change on life‐history traits in hibernating mammals
Effects of climate change on life‐history traits in hibernating mammals Open
Animals can respond to climate change through changes in behaviour, morphology or life‐history traits. Changes in life‐history traits do not occur independently, as they trade off or co‐evolve with other traits. Hibernation is a life‐histo…
View article: Behavioral context of echolocation and prey‐handling sounds produced by killer whales (<i>Orcinus orca</i>) during pursuit and capture of Pacific salmon (<i>Oncorhynchus</i> spp.)
Behavioral context of echolocation and prey‐handling sounds produced by killer whales (<i>Orcinus orca</i>) during pursuit and capture of Pacific salmon (<i>Oncorhynchus</i> spp.) Open
Availability of preferred salmonid prey and a sufficiently quiet acoustic environment in which to forage are critical to the survival of resident killer whales ( Orcinus orca ) in the northeastern Pacific. Although piscivorous killer whale…
View article: Acknowledgments
Acknowledgments Open
View article: Body density of humpback whales (Megaptera novaengliae) in feeding aggregations estimated from hydrodynamic gliding performance
Body density of humpback whales (Megaptera novaengliae) in feeding aggregations estimated from hydrodynamic gliding performance Open
Many baleen whales undertake annual fasting and feeding cycles, resulting in substantial changes in their body condition, an important factor affecting fitness. As a measure of lipid-store body condition, tissue density of a few deep divin…
View article: Spatial and temporal occurrence of killer whale ecotypes off the outer coast of Washington State, USA
Spatial and temporal occurrence of killer whale ecotypes off the outer coast of Washington State, USA Open
Three killer whale Orcinus orca ecotypes inhabit the northeastern Pacific: residents, transients, and offshores. To investigate intraspecific differences in spatial and temporal occur-rence off the outer coast of Washington State, USA, 2 l…
View article: Fine-scale foraging movements by fish-eating killer whales (Orcinus orca) relate to the vertical distributions and escape responses of salmonid prey (Oncorhynchus spp.)
Fine-scale foraging movements by fish-eating killer whales (Orcinus orca) relate to the vertical distributions and escape responses of salmonid prey (Oncorhynchus spp.) Open
View article: Additional file 1: of Fine-scale foraging movements by fish-eating killer whales (Orcinus orca) relate to the vertical distributions and escape responses of salmonid prey (Oncorhynchus spp.)
Additional file 1: of Fine-scale foraging movements by fish-eating killer whales (Orcinus orca) relate to the vertical distributions and escape responses of salmonid prey (Oncorhynchus spp.) Open
Appendix A1. Methods: Calculation of Kinematic Dive Variables. (DOCX 16Â kb)
View article: Humpback whales interfering when mammal‐eating killer whales attack other species: Mobbing behavior and interspecific altruism?
Humpback whales interfering when mammal‐eating killer whales attack other species: Mobbing behavior and interspecific altruism? Open
Humpback whales ( Megaptera novaeangliae ) are known to interfere with attacking killer whales ( Orcinus orca ). To investigate why, we reviewed accounts of 115 interactions between them. Humpbacks initiated the majority of interactions (5…
View article: Fuzzy logic modelling of snow leopard populations in response to threats from climate change
Fuzzy logic modelling of snow leopard populations in response to threats from climate change Open
The snow leopard population in Kazakhstan represents a small but important component of the species range, making up around 2.7% of the global range, of which 18,673 km2 lies within protected areas. The most recent population estimate, by …