[MARMAM] Harbour porpoise habitat modelling based on satellite telemetry

[Jonas Teilmann]

Dear All,

We are pleased to announce our new publication harbour porpoise habitat 
modelling based on satellite telemetry in Marine Ecology Progress Series:

Stalder D, van Beest FM, Sveegaard S, Dietz R, Teilmann J, Nabe-Nielsen J 
(2020). Influence of environmental variability on harbour porpoise movement. 
Mar Ecol Prog Ser 648: 207-219. https://doi.org/10.3354/meps13412

ABSTRACT: The harbour porpoise Phocoena phocoena is a small marine predator 
with a high conservation status in Europe and the USA. To protect the species 
effectively, it is crucial to understand its movement patterns and how the 
distribution of intensively used foraging areas can be predicted from 
environmental conditions. Here, we investigated the influence of both static 
and dynamic environmental conditions on large-scale harbour porpoise movements 
in the North Sea. We used long-term movement data from 57 individuals tracked 
during 1999−2017 in a state-space model to estimate the underlying behavioural 
states, i.e. whether animals used area-restricted or directed movements. 
Subsequently, we assessed whether the probability of using area-restricted 
movements was related to environmental conditions using a generalized linear 
mixed model. Harbour porpoises were more likely to use area-restricted 
movements in areas with low salinity levels, relatively high chlorophyll a 
concentrations and low current velocity, and in areas with steep bottom slopes, 
suggesting that such areas are important foraging grounds for porpoises. Our 
study identifies environmental parameters of relevance for predicting harbour 
porpoise foraging hot spots over space and time in a dynamic system. The study 
illustrates how movement patterns and data on environmental conditions can be 
combined, which is valuable to the conservation of marine mammals.

The paper is open access and can be downloaded here: 
https://www.int-res.com/articles/meps_oa/m648p207.pdf or I can send you a pdf.

All the best,
Jonas Teilmann

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[MARMAM] Incredible porpoise movements in the Atlantic

[Jonas Teilmann]

Dear All,

We are pleased to announce our new publication in Marine Ecology Progress 
Series:

Oceanic movements, site fidelity and deep diving in harbour porpoises from 
Greenland show limited similarities to animals from the North Sea
Nynne H. Nielsen, Jonas Teilmann , Signe Sveegaard , Rikke G. Hansen , 
Mikkel-Holger S. Sinding , Rune Dietz , Mads Peter Heide-Jørgensen
Marine Ecology Progress Series Volume 597, page 259

ABSTRACT: Harbour porpoises Phocoena phocoena <http://Phocoena%20phocoena%20> 
are common in continental shelf areas of the North Atlantic, but little 
information is available on their occurrence outside coastal areas. In this 
study, 30 harbour porpoises were actively caught in West Greenland and 
instrumented with satellite transmitters to document their seasonal movements 
and diving behaviour. The porpoises displayed long-range oceanic movements 
within the North Atlantic, especially during winter/spring where they moved 
over areas with water depths >2500 m. While offshore, 2 females demonstrated an 
average maximum dive depth of 248 m, with the deepest dive reaching 410 m. This 
behaviour is in contrast to 71 porpoises tagged in Danish waters of the North 
Sea which did not leave the continental shelf but showed a preference for areas 
with shallow waters year round, even when at the edge of the continental shelf 
where greater depths were available. Six tags from Greenland transmitted long 
enough (up to 3 yr) to demonstrate extensive movements and strong site fidelity 
to the tagging site in West Greenland the following summer. This study 
documents that harbour porpoises use oceanic habitats and can dive to depths 
that enable mesopelagic foraging, while repeatedly demonstrating summer site 
fidelity to coastal areas.

The paper can be downloaded here: 
https://int-res.com/abstracts/meps/v597/p259-272/ or I can send you a pdf.

All the best,
Nynne Elmelund Lemming
Ph.D. student

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[MARMAM] New paper on porpoise detections in noisy environments

[Jonas Teilmann]

Dear colleagues,
I am pleased to announce the publication of the following open access paper in 
Bioacoustics: https://www.tandfonline.com/doi/full/10.1080/09524622.2018.1477071
https://doi.org/10.1080/09524622.2018.1477071
Karin Tubbert Clausen, Jakob Tougaard, Jacob Carstensen, Matthieu Delefosse & 
Jonas Teilmann (2018): Noise affects porpoise click detections - the magnitude 
of the effect depends on logger type and detection filter settings, 
Bioacoustics, DOI: 10.1080/09524622.2018.1477071
Abstract
Automatic click detectors and full-bandwidth sound recorders are widely used in 
passive acoustic monitoring of small cetaceans. Detection of these signals 
depends on a variety of factors, including signal to noise ratio. Passive 
acoustic monitoring is often used to study impact of underwater noise on small 
cetaceans, but as detection probability is affected by changes in signal to 
noise ratio, variable noise levels may affect conclusions drawn from these 
experiments. Therefore, we examine how different detectors and filters perform 
in varying ocean noise conditions. C-PODs and full-bandwidth recorders 
(Wildlife Acoustics, SM2M+) were deployed at two stations in an environment 
with fluctuating ambient noise for 42 days. Noise level and harbour porpoise 
(Phocoena phocoena) click trains simultaneously recorded on both loggers were 
compared. Overall, we found that porpoise click detections by the algorithm 
used to analyse full-band recorder data (Pamguard) paralleled detections by the 
C-POD. However, Pamguard detected significantly more clicks than the C-POD. A 
decrease in detections was seen for both loggers with increasing noise in the 
band 20 -160 kHz, in particular for levels above 100 dB re 1μPa rms. We also 
found that the Pamguard detection function changed the least over varying noise 
conditions when compared to the C-POD detectors. This study sheds light on the 
fact that inference of animal presence/absence or density that are based on 
echolocation cues (here, Porpoise Positive Minutes) shall account for the 
acoustic environments where probability of detecting signals may be affected by 
variability in ambient noise levels.
Best regards
Jonas Teilmann
___
Jonas Teilmann
Senior Scientist, Ph.D.
Phone: (+45) 21 42 42 91
Fax: (+45) 87 16 87 51
E-mail: j...@bios.au.dk<mailto:j...@bios.au.dk>

Marine Mammal Research Section
Department of Bioscience
Aarhus University
Frederiksborgvej 399
DK-4000 Roskilde
Denmark
http://bios.au.dk/en/about-bioscience/organisation/marine-mammal-research/
https://www.facebook.com/Aarhus-University-Section-for-Marine-Mammal-Research-1481125835511699/



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[MARMAM] Abstract submission deadline extended for ECS Conference in Denmark

[Jonas Teilmann]

Dear All

Due to technical problems with abstract submission yesterday, we have decided 
to extend the deadline until Wednesday 18 January at midnight.

Sorry for the inconvenience this may have caused,
Jonas Teilmann


MORE 
INFORMATION<http://www.europeancetaceansociety.eu/conference/31st-annual-conference-denmark>

Click on More Information to visit out webpage


[cid:image001.jpg@01D26E5A.65FF7C40]

ABSTRACT SUBMISSION DEADLINE
18 JANUARY 2017
ECS, Danish Marine Mammal Society and Aarhus University

invites you to attend the 31st Annual Conference of the European Cetacean 
Society at

Hindsgavl Castle, Middelfart, Denmark

Main conference will be on 1-3 May, 2017

Workshops will take place on 29-30 April, 2017




This year's theme is:
CONSERVATION IN THE LIGHT OF MARINE SPATIAL USE


INVITED KEYNOTE SPEAKERS

Professor Lars Bejder, Murdoch University, Cetacean Research Unit, Australia

Dr. Asha De Vos, Post-doctoral scholar, University of California, Santa Cruz

Dr. Len Thomas, University of St. Andrews, Scotland




IMPORTANT DATES

Abstract and workshop submission deadline: 18 January 2017 (23:45 CET)

Early registration deadline: 15 March 2017 (23:45 CET)

Video abstract submission deadline: 1 March 2017 (23:45 CET)

Late registration deadline and: 1 April 2017 (23.45 CET)




MORE 
INFORMATION<http://www.europeancetaceansociety.eu/conference/31st-annual-conference-denmark>

Click on More Information to visit out webpage

[cid:image002.jpg@01D26E5A.65FF7C40]
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[MARMAM] 3nd Announcement 2017 ECS Conference in Denmark

[Jonas Teilmann]

Dear All
The 13th of January, this coming Friday is deadline for abstracts and workshop 
proposals for this year’s ECS conference in Middelfart, Denmark.
We hope that many of you will submit an abstract, come and celebrate the ECS 30 
year anniversary and make this a great conference.
We will do all we can to make this a memorable event, both with regard to 
science and social networking.
The conference will be at the most beautiful time of year in Denmark, in an old 
renovated castle at the seaside where there will be porpoise guarantee.
Looking forward to see you all!
On behalf of the organizers,
Jonas Teilmann


MORE 
INFORMATION<http://www.europeancetaceansociety.eu/conference/31st-annual-conference-denmark>

Click on More Information to visit out webpage


[cid:image001.jpg@01D2579E.E608C770]

ABSTRACT SUBMISSION DEADLINE
13 JANUARY 2017
ECS, Danish Marine Mammal Society and Aarhus University

invites you to attend the 31st Annual Conference of the European Cetacean 
Society at

Hindsgavl Castle, Middelfart, Denmark

Main conference will be on 1-3 May, 2017

Workshops will take place on 29-30 April, 2017




This year's theme is:
CONSERVATION IN THE LIGHT OF MARINE SPATIAL USE


INVITED KEYNOTE SPEAKERS

Professor Lars Bejder, Murdoch University, Cetacean Research Unit, Australia

Dr. Asha De Vos, Post-doctoral scholar, University of California, Santa Cruz

Dr. Len Thomas, University of St. Andrews, Scotland




IMPORTANT DATES

Abstract and workshop submission deadline: 13 January 2017 (23:45 CET)

Early registration deadline: 15 March 2017 (23:45 CET)

Video abstract submission deadline: 1 March 2017 (23:45 CET)

Late registration deadline and: 1 April 2017 (23.45 CET)




MORE 
INFORMATION<http://www.europeancetaceansociety.eu/conference/31st-annual-conference-denmark>

Click on More Information to visit out webpage

[cid:image002.jpg@01D2579E.E608C770]
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[MARMAM] 2nd Announcement 2017 ECS Conference in Denmark

[Jonas Teilmann]

MORE 
INFORMATION

Click on More Information to visit out webpage


[cid:image001.jpg@01D2579E.E608C770]

ABSTRACT SUBMISSION DEADLINE
13 JANUARY 2017
ECS, Danish Marine Mammal Society and Aarhus University

invites you to attend the 31st Annual Conference of the European Cetacean 
Society at

Hindsgavl Castle, Middelfart, Denmark

Main conference will be on 1-3 May, 2017

Workshops will take place on 29-30 April, 2017




This year's theme is:
CONSERVATION IN THE LIGHT OF MARINE SPATIAL USE


INVITED KEYNOTE SPEAKERS

Professor Lars Bejder, Murdoch University, Cetacean Research Unit, Australia

Dr. Asha De Vos, Post-doctoral scholar, University of California, Santa Cruz

Dr. Len Thomas, University of St. Andrews, Scotland




IMPORTANT DATES

Abstract and workshop submission deadline: 13 January 2017 (23:45 CET)

Early registration deadline: 15 March 2017 (23:45 CET)

Video abstract submission deadline: 1 March 2017 (23:45 CET)

Late registration deadline and: 1 April 2017 (23.45 CET)




MORE 
INFORMATION

Click on More Information to visit out webpage

[cid:image002.jpg@01D2579E.E608C770]
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[MARMAM] New focus issue on environmental impact of wind farms

[Jonas Teilmann]

I am pleased to announce that we have now finalised the cross-disciplinary 
focus issue in Environmental Research Letters with special emphasis on the 
effect of offshore wind farms on harbour porpoises.

See a summary of the issue here:

http://iopscience.iop.org/1748-9326/8/3/035001/pdf/1748-9326/8/3/035001.pdf

and all the papers here:

http://iopscience.iop.org/1748-9326/focus/Environmental%20impact%20of%20wind%20energy

Best regards,

Jonas Teilmann
__
Senior Scientist, Ph.D.
Phone: 45) 21 42 42 91
Fax: (+45) 87 16 87 51
E-mail: j...@dmu.dkmailto:j...@dmu.dk

Department of Bioscience
Aarhus University
Frederiksborgvej 399
DK-4000 Roskilde
Denmark

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[MARMAM] New paper: Negative long term effects on harbour porpoises from a large scale offshore wind farm in the Baltic - evidence of slow recovery

[Jonas Teilmann]

Dear colleagues,
I am pleased to announce the publication of the following open access paper in 
Environmental Research Letters.


Teilmann, J. and Carstensen, J. (2012). Negative long term effects on harbour 
porpoises from a large scale offshore wind farm in the Baltic - evidence of 
slow recovery. Environmental Research Letters 7, 
doi:10.1088/1748-9326/7/4/045101

http://iopscience.iop.org/1748-9326/7/4/045101/pdf/1748-9326_7_4_045101.pdf
Abstract
Offshore wind farms constitute a new and fast growing industry all over the 
world. This study investigates the long term impact on harbour porpoises, 
Phocoena phocoena, for more than 10 years (2001-12) from the first large scale 
offshore wind farm in the world, Nysted Offshore Wind Farm, in the Danish 
western Baltic Sea (72 × 2.3 MW turbines). The wind farm was brought into full 
operation in December 2003. At six stations, acoustic porpoise detectors 
(T-PODs) were placed inside the wind farm area and at a reference area 10 km to 
the east, to monitor porpoise echolocation activity as a proxy of porpoise 
presence. A modified statistical BACI design was applied to detect changes in 
porpoise presence before, during and after construction of the wind farm. The 
results show that the echolocation activity has significantly declined inside 
Nysted Offshore Wind Farm since the baseline in 2001-2 and has not fully 
recovered yet. The echolocation activity inside the wind farm has been 
gradually increasing (from 11% to 29% of the baseline level) since the 
construction of the wind farm, possibly due to habituation of the porpoises to 
the wind farm or enrichment of the environment due to reduced fishing and to 
artificial reef effects.

Best regards
Jonas Teilmann
_
Jonas Teilmann , Senior Scientist, Ph.D.
Phone: 45) 21 42 42 91
Fax: (+45) 87 16 87 51
E-mail: j...@dmu.dkmailto:j...@dmu.dk

Department of Bioscience (former NERI)
Aarhus University
Frederiksborgvej 399
DK-4000 Roskilde
Denmark

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