Dr Saana Isojunno
I’m a behavioural ecologist with a keen interest in energetics and exercise. I use on-animal sensors and time series models to quantify activity states, time budgets and proxy locomotion costs of free-ranging animals. I’m particularly interested in the drivers of individual responsiveness and vulnerability to environmental uncertainty and anthropogenic disturbance (conservation behaviour).
For my PhD and postdoctoral research so far I’ve focused on how and why cetaceans respond to whale-watching and navy sonar, using bioacoustics and biologging as tools. I’m currently working in Prof Patrick Miller’s lab as the named postdoc under two projects:
"Interpreting the biological significance of behavior associated with 3S experimental sonar exposures". For this project, I estimated activity-time budgets to contrast the magnitude of foraging time trade-offs under simulated predation risk (playback of mammal-eating killer whale sounds) and exposure to anthropogenic noise (1-2kHz navy sonar) in a comparative study across four different cetacean species. The state-switching model development was funded by the Mocha project (PIs Catriona Harris and Len Thomas) which aimed to showcase hidden Markov models as a method to integrate multiple streams of sparse time series data in behavioural response studies. I’m also investigating whether respiratory behaviour detected from onboard tag sensors can be linked to diving behaviour and indicate any energetic or physiological cost of behavioural responses to sound exposures.
"3S3 – Behavioural responses of sperm whales to naval sonar – Comparing responses to continuous active sonar (CAS) and pulsed active sonar (PAS), and disentangling received level from range as the response driver". I will lead two core deliverables for this project: contrast activity time trade-offs and response duration to CAS vs PAS exposures, and test hypotheses about masking of terminal echolocation sounds (buzzes).
On the field, I have worked with a range of cetacean species (harbour porpoise, sperm whale, pilot whale, northern bottlenose and humpback whale). My roles have included survey design, tagging (ARTS and cantilever pole), and working as a DTAG and acoustic technician.
In the future, I hope to integrate more individual-level traits (e.g. age-sex) and ecophysiology in my research to better understand individual and species behavioural plasticity to cope with anthropogenic stressors. For example, I was very excited to be a part of a team to estimate body density as a proxy for body condition from accelerometer data of gliding beaked whales. I developed models in a hierarchical Bayesian framework to simultaneously estimate tissue vs. air density using expected hydrodynamic relationships between acceleration, drag and buoyancy forces (Miller et al., 2016).
Please don’t hesitate to get in touch – I would be especially interested in ideas for collaborations across disciplines.
16 (of 16 published available) for si66. (source: University of St Andrews PURE)
Please click title of any item for full details.
Tomoko Narazaki, Saana Isojunno, Douglas P. Nowacek, Ari S. Friedlaender, Christian Ramp, Sophie Caroline Smout, Kagari Aoki, Volker Bernt Deecke, Katsufumi Sato, Patrick Miller
Keywords: QH301 BiologyDAS
Frontiers in Physiology
Saana Isojunno, Kagari Aoki, Charlotte Curé, Peter Kvadsheim, Patrick Miller
Keywords: Aerobic diving limit, Anthropogenic noise, Code:R, Dtag, Field Metabolic Rate (FMR), Globicephala melas, Respiratory rate, SonarQH301 Biology, QP PhysiologyDAS
Frontiers in Ecology and Evolution
Saana Isojunno, Dina Sadykova, Matthew Bowers, Douglas P. Nowacek, Andrew J Read
Keywords: QH301 BiologyGeneralNDAS
Journal of Experimental Biology
Kagari Aoki, Katsufumi Sato, Saana Isojunno, Tomoko Narazaki, Patrick Miller
Keywords: Body condition, Cetacean, Deep-diving marine mammals, Foraging strategy, Globicephala melas, Swimming kinematicsQH301 BiologyNDAS
Saana Isojunno, Dinara Sadykova, Stacy Lynn De Ruiter, Charlotte Curé, Fleur Visser, Len Thomas, Patrick Miller, Catriona M Harris
Keywords: Anthropogenic noise, Activity synchrony, Benthic habitat, Deep diving mammal, DTAG, Ethogram, Globicephala melas, Hidden Markov model, Naval sonarQH301 BiologyDAS
Behavioral Ecology and Sociobiology
Fleur Visser, Annebelle C.M. Kok, Machiel G. Oudejans, Lindesay Alexandra Sarah Scott-Hayward, Stacy Lynn De Ruiter, Ana Catarina De Carvalho Alves, Ricardo Nuno Antunes, Saana Isojunno, Graham J. Pierce, Hans Slabbekoorn, Jef Huisman, Patrick Miller
Keywords: Acoustic tags, Animal communication, Call, Foraging, Pilot whale, Social behaviourQH301 Biology, QL ZoologyEcology, Evolution, Behavior and Systematics, Animal Science and ZoologyDAS
Endangered Species Research
Charlotte Curé, Saana Isojunno, Fleur Visser, Paul Wensveen, Lise D. Sivle, Petter H. Kvadsheim, Frans-Peter A. Lam, Patrick Miller
Keywords: Sperm whales, Behavioral responses, Naval sonar, Anti-predator responses, Anthropogenic disturbanceQH301 Biology
Journal of Experimental Biology
Patrick Miller, Tomoko Narazaki, Saana Isojunno, Kagari Aoki, Sophie Caroline Smout, Katsufumi sato
Keywords: Body condition, Lipid, Hydrodynamic performance, Drag, BuoyancyGC Oceanography, QH301 Biology, QL ZoologyAgricultural and Biological Sciences(all)
Proceedings of Meetings on Acoustics
Natacha Aguilar de Soto, Sascha Kate Hooker, Saana Isojunno, Mark Johnson, Patrick Miller, Peter Lloyd Tyack, Paul Wensveen, Carl Robert Donovan, Catriona M Harris, Danielle Harris, Laura Helen Marshall, Cornelia Sabrina Oedekoven, Rocio Prieto, Len Thomas
Keywords: GC Oceanography, QH301 Biology, SH Aquaculture. Fisheries. Angling
Saana Isojunno, Charlotte Cure, Petter Helgevold Kvadsheim, Frans Peter Alexander Lam, Peter Lloyd Tyack, Paul Wensveen, Patrick Miller
Keywords: Anthropogenic noise, Behavioral budget, DTAG, Functional state, Naval sonar, Northern Norway, Physeter macrocephalus, Risk-disturbance hypothesis, Sperm whale, State-switching model, Time series modelQH301 BiologyEcology
Marine Ecology Progress Series
Charlotte Cure, Lise Doksaeter-Sivle, Fleur Visser, Paul Wensveen, Saana Isojunno, Catriona M Harris, Petter Kvadsheim, Frans-Peter Lam, Patrick Miller
Keywords: Anti-predator strategy, Predator sound playbacks, Multi-sensor tag, Behavioural responses, Horizontal avoidance, Baleen whale, Humpback whaleQH301 Biology
Lise D. Sivle, Petter H. Kvadsheim, Charlotte Cure, Saana Isojunno, Paul Wensveen, Frans-Peter A. Lam, Fleur Visser, Lars Kleivane, Peter Lloyd Tyack, Catriona M Harris, Patrick Miller
Keywords: Behavioural response, Naval sonar, Severity scoring, Humpback whale, Mega, minke whale, Balaenoptera acutorostrata, Northern bottlenose whale, Hyperoodon ampullatus, controlled exposure experiment, arctic biologyGE Environmental Sciences, QH301 Biology, QL Zoology
Marine Ecology Progress Series