[MARMAM] New publication: Comparing Distribution of Harbour Porpoises Derived from Satellite Telemetry and Passive Acoustic Monitoring (Lonnie Mikkelsen)
lomi at bios.au.dk
Tue Aug 2 23:49:41 PDT 2016
Dear MARMAM readers
We are pleased to announce the publication of the following article in Plos One:
"Comparing Distribution of Harbour Porpoises (Phocoena phocoena) Derived from Satellite Telemetry and Passive Acoustic Monitoring".
By: Lonnie Mikkelsen, Frank F. Rigét, Line A. Kyhn, Signe Sveegaard, Rune Dietz, Jakob Tougaard, Julia A. K. Carlström, Ida Carlén, Jens C. Koblitz and Jonas Teilmann. PLoS ONE 11(7): e0158788. doi:10.1371/journal.pone.0158788
Cetacean monitoring is essential in determining the status of a population. Different monitoring methods should reflect the real trends in abundance and patterns in distribution, and results should therefore ideally be independent of the selected method. Here, we compare two independent methods of describing harbour porpoise (Phocoena phocoena) relative distribution pattern in the western Baltic Sea. Satellite locations from 13 tagged harbour porpoises were used to build a Maximum Entropy (MaxEnt) model of suitable habitats. The data set was subsampled to one location every second day, which were sufficient to make reliable models over the summer (Jun-Aug) and autumn (Sep-Nov) seasons. The modelled results were compared to harbour porpoise acoustic activity obtained from 36 static acoustic monitoring stations (C-PODs) covering the same area. The C-POD data was expressed as the percentage of porpoise positive days/hours (the number of days/hours per day with porpoise detections) by season. The MaxEnt model and C-POD data showed a significant linear relationship with a strong decline in porpoise occurrence from west to east. This study shows that two very different methods provide comparable information on relative distribution patterns of harbour porpoises even in a low density area.
Open access: http://journals.plos.org/plosone/article?id=10.1371%2Fjournal.pone.0158788
For any questions, please feel free to contact me at: lomi at bios.au.dk<mailto:lomi at bios.au.dk>
Lonnie Mikkelsen, PhD Student
Aarhus University - Department of Bioscience
DK - 4000 Roskilde
Tlf.: +45 87158716
Mobil: +45 20450260
Mail: lomi at bios.au.dk<mailto:lomi at bios.au.dk>
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