Testing the Trex in Laos (2024)
Spectrogram sections of channel 0 (mic 1) of a 1-min section from four Trex recorders (R03, R11, R14 and R13, top to bottom) depicting the annotated gibbon calls including female great calls with call IDs 3 and 5. This shows that visual inspection of spectrograms is useful for call matching and that the same calls can be detected on multiple recorders ~1km apart. For more info check out the field work blog.
Our new Trex recorders for monitoring gibbons (2023)
Our Trex recorders have 4 microphones which allows estimating the bearings to the calling animals. We use PAMGuard software for finding the calls in the recordings (either manually or with an automatic detector) and for estimating the bearings based on the time difference of arrival at the 4 microphones. Obtaining bearings to the animals is useful for localising and for estimating abundance using spatial capture-recapture methods.
How many dolphins are in the sea?
Check out the video I had prepared for Science Discovery Day. You can also watch it on twitter @CSOedekoven
Using drones for surveying dolphins in the high seas
To test new methods for estimating abundance of dolphins in the eastern tropical Pacific (ETP), we conducted a 14-day trial survey on...
Surveying dolphins in Vietnam
Irrawaddy dolphins The endangered Irrawaddy dolphin is one of the cetacean species that occurs in the UNESCO designated Biosphere...
Workshop in Ho Chi Minh City
In November I travelled to Ho Chi Minh City and gave a two-day statistical workshop on Introduction to Distance Sampling and Passive...
Design of an ETP dolphin survey
The design of an eastern tropical Pacific dolphin survey is a very exciting project that I have been working on with Steve, Laura and...
Distance Sampling Workshop Online
Check out this online version of our Distance Sampling workshop! Traditionally, we have been giving this introductory workshop here in St...
Rammed by a sperm whale?
Our paper was recently published in Aquatic Mammals in which we describe our encounter with a group of sperm whales near the Mariana's...
Birds & Climate in Space & Time: Separating Spatial &Temporal Effects of Climate Change on Wildlife
Our paper Attributing abundance changes to weather variables: separating the spatial and temporal effects was recently published in...
Documenting the imminent extinction of the vaquita
On 16 March 2017, Len and I gave a CREEM seminar on the current status of the vaquita porpoise. The abstract of the seminar is shown...
How does underwater noise affect marine fauna?
Photo: Cornelia Oedekoven, courtesy NOAA. This question is becoming more and more important with the increase in human-produced...
Our paper on the endangered spur-thighed tortoise is out!
The spur-thighed tortoises live in the southwestern Iberian Peninsula in originally mosaic-type landscapes composed of pine forests,...
My first invitation to give a plenary talk!
This summer I was invited to give my first plenary talk at the conference Listening for aquatic mammals in Latin America (LAMLA 2016)...
Hierarchical centering for RJMCMC
My co-authors and I are pleased that our paper on hierarchical centering for RJMCMC algorithms was recently published in Computational...