Dear MARMAM colleagues,

My co-authors and I are happy to announce the publication of our latest paper 
entitled "What the F-POD? Comparing the F-POD and C-POD for monitoring of 
harbour porpoise (Phocoena phococena)" in Ecology and Evolution. The link to 
download the open access article and the abstract can be found below:

Abstract:

Passive acoustic monitoring (PAM) is a cost-effective method for monitoring 
cetacean populations compared with techniques such as aerial and ship-based 
surveys. The Cetacean POrpoise Detector (C-POD) has become an integral tool in 
monitoring programs globally for over a decade, providing standardized metrics 
of occurrence that can be compared across time and space. However, the phasing 
out of C-PODs following the development of the new Full waveform capture POD 
(F-POD) with increased sensitivity, improved train detection, and reduced 
false-positive rates represents an important methodological change in data 
collection, particularly when being introduced into existing monitoring 
programs. Here, we compare the performance of the C-POD with that of its 
successor, the F-POD, co-deployed in a field setting for 15 months, to monitor 
harbor porpoise (Phocoena phocoena). While similar temporal trends in 
detections were found for both devices, the C-POD detected only 58% of the 
detection-positive minutes (DPM), recorded by the F-POD. Differences in 
detection rates were not consistent through time making it difficult to apply a 
correction factor or directly compare results obtained from the two PODs. 
Generalized additive models (GAMs) were used to test whether these differences 
in detection rates would have an effect on analyses of temporal patterns and 
environmental drivers of occurrence. No differences were found in seasonal 
patterns or the environmental correlates of porpoise occurrence (month, diel 
period, temperature, environmental noise, and tide). However, the C-POD failed 
to detect sufficient foraging rates to identify temporal patterns in foraging 
behavior, which were shown by the F-POD. Our results suggest that the switch to 
F-PODs will have little effect on determining broad-scale seasonal patterns of 
occurrence but may improve our understanding of fine-scale behaviors such as 
foraging. We highlight how care must be taken interpreting F-POD results as 
indicative of increased occurrence when used in time-series analysis.


Article can be downloaded from: 
https://onlinelibrary.wiley.com/share/3MMBM355DEWGUWUM7I3S?target=10.1002/ece3.10186

Don't hesitate to contact me (nicole.t...@ucc.ie) if you have any questions!

Cheers,
Nicole



Nicole Todd| PhD student



MaREI Centre | School of Biological, Earth & Environmental Science

University College Cork

+353 (0)21 486 4395



@NicoleRETodd

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