Todd E. Dennis
Fiji National University
EcologyPopulationMystacina tuberculataGlobal Positioning SystemBiology
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Publications 46
#1Justine L. Atkins (Princeton University)H-Index: 2
#2George L. W. Perry (University of Auckland)H-Index: 34
Last. Todd E. Dennis (Fiji National University)H-Index: 16
view all 3 authors...
Dispersal is fundamental to population dynamics and hence extinction risk. The dispersal success of animals depends on the biophysical structure of their environments and their biological traits; h...
2 CitationsSource
#1Justine L. AtkinsH-Index: 2
#2George L. W. PerryH-Index: 34
Last. Todd E. DennisH-Index: 16
view all 3 authors...
#1Cheryl R. Krull (University of Auckland)H-Index: 6
#2Louise McMillan (University of Auckland)H-Index: 4
Last. Margaret C. Stanley (University of Auckland)H-Index: 14
view all 7 authors...
Context Wireless sensor networks (WSNs) are revolutionising areas of animal behaviour research and are advantageous based on their ability to be deployed remotely and unobtrusively, for long time periods in inaccessible areas. Aims We aimed to determine the feasibility of using a WSN to track detailed movement paths of small animals, e.g. rats (Rattus spp.) 100–400 g, too small for current GPS technology, by calibrating active Radio Frequency Identification (RFID) tags and loggers using Radio Fr...
1 CitationsSource
Brown skuas Catharacta antarctica lonnbergi breed across a broad latitudinal range from the Antarctic to temperate regions. While information on the non-breeding distribution and behaviour for Antarctic and subantarctic populations is known, no data exist for populations breeding at temperate latitudes. We combined geolocation sensing and stable isotope analysis of feather tissue to study the non-breeding behaviour of brown skuas from the temperate Chatham Islands, a population that was historic...
#1Marlee A. Tucker (Goethe University Frankfurt)H-Index: 6
#2Katrin Böhning-Gaese (Goethe University Frankfurt)H-Index: 50
Last. Thomas Mueller (Goethe University Frankfurt)H-Index: 22
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Animal movement is fundamental for ecosystem functioning and species survival, yet the effects of the anthropogenic footprint on animal movements have not been estimated across species. Using a unique GPS-tracking database of 803 individuals across 57 species, we found that movements of mammals in areas with a comparatively high human footprint were on average one-half to one-third the extent of their movements in areas with a low human footprint. We attribute this reduction to behavioral change...
146 CitationsSource
#1Craig E. Simpkins (GAU: University of Göttingen)H-Index: 3
#2Todd E. Dennis (University of Auckland)H-Index: 16
Last. George L. W. Perry (University of Auckland)H-Index: 34
view all 4 authors...
Abstract Due to increasing habitat fragmentation and concern about its ecological effects, there has been an upsurge in the use of landscape connectivity estimates in conservation planning. Measuring connectivity is challenging, resulting in a limited understanding of the efficacy of connectivity estimation techniques and the conditions under which they perform best. We evaluated the performance of four commonly used connectivity metrics – Euclidean distance; least-cost paths (LCP) length and co...
8 CitationsSource
#1Rebecca M. Lehrke (University of Auckland)H-Index: 1
#2Lizzie McGregorH-Index: 1
Last. Todd E. Dennis (Fiji National University)H-Index: 16
view all 5 authors...
Context Knowledge of the movements and space-use patterns of wildlife is crucial for implementation of effective conservation and management actions. Such information can be difficult to obtain, especially from hard-to-capture or far-ranging taxa. Global-positioning-system (GPS) receivers that have remote data-acquisition capability via satellite-communication networks offer an effective means of tracking highly mobile animals; however, often the equipment and operational costs of these devices ...
1 CitationsSource
#1Jingjing Zhang (University of Auckland)H-Index: 3
#2Todd E. Dennis (University of Auckland)H-Index: 16
Last. George L. W. Perry (University of Auckland)H-Index: 34
view all 5 authors...
Individual-based models (IBMs) are increasingly used to explore ecological systems and, in particular, the emergent outcomes of individual-level processes. A major challenge in developing IBMs to investigate the movement ecology of animals is that such models must represent and parameterise unobserved behaviours occurring at multiple hierarchical levels. Approaches based on approximate Bayesian computation (ABC) methods have been used to support the parameterisation, calibration and evaluation o...
5 CitationsSource
#1Emma GrayH-Index: 38
#2Todd E. DennisH-Index: 16
Last. Andrew M. BakerH-Index: 20
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The black-tailed dusky antechinus (Antechinus arktos) is an endangered, small carnivorous marsupial endemic to Australia, which occurs at low population density along with abundant sympatric populations of other small mammals: Antechinus stuartii, Rattus fuscipes and Melomys cervinipes. Using A. arktos as a model species, we aimed to evaluate the effectiveness of infrared digital camera traps for detecting and differentiating small mammals and to comment on the broad applicability of this method...
1 CitationsSource
#1Timothée A. Poupart (Museum of New Zealand Te Papa Tongarewa)H-Index: 3
#2Susan M. Waugh (Museum of New Zealand Te Papa Tongarewa)H-Index: 14
Last. John P. Y. Arnould (Deakin University)H-Index: 36
view all 12 authors...
ABSTRACTThe little penguin Eudyptula minor is primarily an inshore forager with its range generally limited to c. 30 km of breeding sites during the nesting period. However, exceptions with greater foraging distances have been recorded in Australia. To investigate the foraging range plasticity in New Zealand we used GPS tracks gathered on 68 individuals in three regions of central New Zealand between 2011 and 2016. Foraging patterns varied between sites and between years. Tracks revealed that pe...
3 CitationsSource