Creation of accurate 3D models of harbor porpoises ( Phocoena phocoena ) using 3D photogrammetry

2020 ◽  
Author(s):  
Duncan J. Irschick ◽  
Johnson Martin ◽  
Ursula Siebert ◽  
Jakob H. Kristensen ◽  
Peter T Madsen ◽  
...  
Keyword(s):  
3D Models ◽  
Phocoena Phocoena ◽  
3D Photogrammetry ◽  
Harbor Porpoises

Effect of Pile-Driving Playback Sound Level on Fish-Catching Efficiency in Harbor Porpoises (Phocoena phocoena)

2019 ◽  
Vol 45 (4) ◽  
pp. 398-410 ◽  
Author(s):  
Ronald A. Kastelein ◽  
Léonie A. E. Huijser ◽  
Suzanne Cornelisse ◽  
Lean Helder-Hoek ◽  
Nancy Jennings ◽  
...  
Keyword(s):  
Sound Level ◽  
Pile Driving ◽  
Phocoena Phocoena ◽  
Harbor Porpoises

Behavioral Responses of Harbor Porpoises (Phocoena phocoena) to U.S. Navy 53C Sonar Signals in Noise

2019 ◽  
Vol 45 (4) ◽  
pp. 359-366
Author(s):  
Ronald A. Kastelein ◽  
Michael A. Ainslie ◽  
Ruby van Kester
Keyword(s):  
Behavioral Responses ◽  
Phocoena Phocoena ◽  
Harbor Porpoises

scholarly journals Mycotic Infections in Free-Ranging Harbor Porpoises (Phocoena phocoena)

2020 ◽  
Vol 7 ◽  
Author(s):  
Athanasia Kapetanou ◽  
Lonneke L. IJsseldijk ◽  
Dorien S. Willems ◽  
Els M. Broens ◽  
Eligius Everaarts ◽  
...  
Keyword(s):  
Phocoena Phocoena ◽  
Free Ranging ◽  
Harbor Porpoises ◽  
Mycotic Infections

scholarly journals Phthalate metabolites in harbor porpoises (Phocoena phocoena) from Norwegian coastal waters

2020 ◽  
Vol 137 ◽  
pp. 105525 ◽  
Author(s):  
May Britt Rian ◽  
Kristine Vike-Jonas ◽  
Susana Villa Gonzalez ◽  
Tomasz Maciej Ciesielski ◽  
Vishwesh Venkatraman ◽  
...  
Keyword(s):  
Coastal Waters ◽  
Phocoena Phocoena ◽  
Phthalate Metabolites ◽  
Harbor Porpoises

Harbor porpoise (Phocoena phocoena) recovery in the inland waters of Washington: estimates of density and abundance from aerial surveys, 2013–2015

2016 ◽  
Vol 94 (7) ◽  
pp. 505-515 ◽  
Author(s):  
Thomas A. Jefferson ◽  
Mari A. Smultea ◽  
Sarah S. Courbis ◽  
Gregory S. Campbell
Keyword(s):  
Puget Sound ◽  
Distance Sampling ◽  
Line Transect ◽  
Inland Waters ◽  
San Juan ◽  
Phocoena Phocoena ◽  
Harbor Porpoise ◽  
San Juan Islands ◽  
Juan De Fuca ◽  
Harbor Porpoises

The harbor porpoise (Phocoena phocoena (L., 1758)) used to be common in Puget Sound, Washington, but virtually disappeared from these waters by the 1970s. We conducted systematic aerial line-transect surveys (17 237 km total effort) for harbor porpoises, with the goal of estimating density and abundance in the inland waters of Washington State. Surveys in Puget Sound occurred throughout the year from 2013 to 2015, and in the Strait of Juan de Fuca and the San Juan Islands (and some adjacent Canadian waters) in April 2015. We used a high-wing, twin-engine Partenavia airplane and four observers (one on each side of the plane, one looking through a belly port, and one recording data). A total of 1063 harbor porpoise groups were sighted. Density and abundance were estimated using conventional distance sampling methods. Analyses were limited to 447 harbor porpoise groups observed during 5708 km of effort during good sighting conditions suitable for line-transect analysis. Harbor porpoises occurred in all regions of the study area, with highest densities around the San Juan Islands and in northern Puget Sound. Overall, estimated abundance for the Washington Inland Waters stock was 11 233 porpoises (CV = 37%, 95% CI = 9 616 – 13 120). This project clearly demonstrated that harbor porpoises have reoccupied waters of Puget Sound and are present there in all seasons. However, the specific reasons for their initial decline and subsequent recovery remain uncertain.

scholarly journals UNDERWATER PHOTOGRAMMETRY DIGITAL SURFACE MODEL (DSM) OF THE SUBMERGED SITE OF THE ANCIENT LIGHTHOUSE NEAR QAITBAY FORT IN ALEXANDRIA, EGYPT

2019 ◽  
Vol XLII-2/W10 ◽  
pp. 1-8 ◽  
Author(s):  
M. Abdelaziz ◽  
M. Elsayed
Keyword(s):  
3D Model ◽  
Low Cost ◽  
Data Gathering ◽  
Archaeological Site ◽  
3D Models ◽  
Surface Model ◽  
Digital Surface Model ◽  
Architectural Elements ◽  
3D Photogrammetry ◽  
First Time

<p><strong>Abstract.</strong> Underwater photogrammetry in archaeology in Egypt is a completely new experience applied for the first time on the submerged archaeological site of the lighthouse of Alexandria situated on the eastern extremity of the ancient island of Pharos at the foot of Qaitbay Fort at a depth of 2 to 9 metres. In 2009/2010, the CEAlex launched a 3D photogrammetry data-gathering programme for the virtual reassembly of broken artefacts. In 2013 and the beginning of 2014, with the support of the Honor Frost Foundation, methods were developed and refined to acquire manual photographic data of the entire underwater site of Qaitbay using a DSLR camera, simple and low cost materials to obtain a digital surface model (DSM) of the submerged site of the lighthouse, and also to create 3D models of the objects themselves, such as statues, bases of statues and architectural elements. In this paper we present the methodology used for underwater data acquisition, data processing and modelling in order to generate a DSM of the submerged site of Alexandria’s ancient lighthouse. Until 2016, only about 7200&amp;thinsp;m<sup>2</sup> of the submerged site, which exceeds more than 13000&amp;thinsp;m<sup>2</sup>, was covered. One of our main objectives in this project is to georeference the site since this would allow for a very precise 3D model and for correcting the orientation of the site as regards the real-world space.</p>

scholarly journals Comparing the performance of C-PODs and SoundTrap/PAMGUARD in detecting the acoustic activity of harbor porpoises (Phocoena phocoena)

2016 ◽  
Author(s):  
Joanna Sarnocinska ◽  
Jakob Tougaard ◽  
Mark Johnson ◽  
Peter T. Madsen ◽  
Magnus Wahlberg
Keyword(s):  
Phocoena Phocoena ◽  
Acoustic Activity ◽  
Harbor Porpoises

Levels of Polychlorinated Biphenyls Are Still Associated with Toxic Effects in Harbor Porpoises (Phocoena phocoena) Despite Having Fallen below Proposed Toxicity Thresholds

2020 ◽  
Vol 54 (4) ◽  
pp. 2277-2286 ◽  
Author(s):  
Rosie Williams ◽  
Mariel ten Doeschate ◽  
David J. Curnick ◽  
Andrew Brownlow ◽  
Jonathan L. Barber ◽  
...  
Keyword(s):  
Polychlorinated Biphenyls ◽  
Toxic Effects ◽  
Phocoena Phocoena ◽  
Harbor Porpoises
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