Results 51 to 60 of about 6,377 (167)

Programmed unmanned aerial vehicles show great potential for monitoring marine megafauna in specific areas of interest

Remote Sensing in Ecology and Conservation, EarlyView.
Targeted conservation measures are contingent on robust knowledge of spatio‐temporal animal distribution in areas of interest. We explore unmanned aerial vehicle (UAV) transect monitoring as a novel method for standardized digital aerial surveys of marine megafauna by investigating the fine‐resolution spatio‐temporal distribution of harbour porpoises ...
Dinah Hartmann, Valdemar Palmqvist, Johanna Stedt   +2 more
wiley   +1 more source

Severe Hearing Loss in the World's First Successfully Captive‐Born Yangtze Finless Porpoise: Impact of High Underwater Sound Exposure and Congenital Hearing Disorders

Integrative Zoology, EarlyView.
The audiogram of the world's first successfully captive‐born Yangtze finless porpoise was on average 40 dB higher than conspecifics. Congenital hearing disorders and noise exposure may be the primary cause of porpoise's hearing loss. ABSTRACT Aquariums globally have seen significant growth in recent decades.
Zhitao Wang, Tomonari Akamatsu, Kexiong Wang, Ding Wang   +3 more
wiley   +1 more source

Determining the spatial and temporal extent of the influence of pile driving sound on harbour porpoises [PDF]

, 2017
Piling driving sound is known to impact harbour porpoise (Phocoena phocoena) distribution, but to date detailed knowledge on the combined spatial and temporal components of this impact over longer time periods remains lacking. From May to September 2016,
Debusschere, E., Degraer, S., Deneudt, K., Haelters, J., Norro, A., Reubens, J., Rumes, B.   +6 more
core  

Microhaplotype Methods Enable Relationship Inference in a Bottlenecked Mammalian Species

Animal Conservation, EarlyView.
Northern elephant seals (Mirounga angustirostris) are among the most genetically depauperate mammals in the world. A near‐total population bottleneck in the 19th century, coupled with the breeding system of extreme polygyny, has challenged efforts to estimate individual reproductive success with genetic methods.
Keith M. Hernandez, Anthony J. Clemento, Juliette E. Linossier, Daniel E. Crocker, Daniel P. Costa, Colleen Reichmuth, John Carlos Garza   +6 more
wiley   +1 more source

Modelling the effect of varying metabolic rate and cardiac output on estimated tissue and blood O2 and CO2 levels in an extreme deep‐diver, the goose‐beaked whale (Ziphius cavirostris)

Experimental Physiology, EarlyView.
Abstract High‐resolution movement data from Cuvier's beaked, or goose‐beaked whale (Ziphius cavirostris, hereafter Ziphius, n = 8) tag deployments (4.1–19.2 days) were used to estimate blood and tissue O2 and CO2 levels. Acceleration and magnetometry data were used to estimate the locomotion cost (LC) from the relationship between activity and the O2 ...
Andreas Fahlman, Gregory S. Schorr, David A. Sweeney, Brenda K. Rone, Shannon N. Coates, Austin S. Allen, Lucia M. Martín López, Susan M. Jarvis, Erin A. Falcone   +8 more
wiley   +1 more source

Temporal and spatial trends in stranding records of cetaceans on the Irish coast, 2002–2014 [PDF]

, 2016
Using Irish strandings data collected between 2002 and 2014, seasonal and annual trends in the number of strandings for all strandings identified to species level (N ¼ 1480), and for the five most frequently reported species: common dolphin (25.7% of ...
Berrow, Simon, Culloch, Ross M., McGovern, Barry, O'Connell, Michael   +3 more
core   +1 more source

Validation of aerial photogrammetry methods to measure body size, condition and mass in small cetaceans

The Journal of Physiology, EarlyView.
Abstract figure legend Unoccupied aerial vehicle (UAV)‐based photogrammetry provides measurements equivalent to traditional hand measurements in bottlenose dolphins. Mass estimates derived from UAV measurements closely match the true body mass of live individuals.
Riccardo Cicciarella, Erik P. Willems, Benjamin Markham, Manuela R. Bizzozzero, Wayne Phillips, Simon J. Allen, Michael Krützen, Fredrik Christiansen   +7 more
wiley   +1 more source

Geographical, and seasonal variation in the diet of harbour porpoises (Phocoena phocoena) in Icelandic coastal waters

NAMMCO Scientific Publications, 2003
The stomach contents of 1,047 harbour porpoises (Phocoena phocoena) bycaught in gillnets off Iceland were analysed. Most of the samples were obtained southwest (SW) and southeast (SE) of Iceland and the majority were taken in March and April.
Gísli A Víkingsson, Droplaug Ólafsdóttir, Jóhann Sigurjónsson   +2 more
doaj   +1 more source

Distribution and density of harbour popoises in Dutch North Sea waters [PDF]

, 2009
Aerial surveys were conducted to investigate harbour porpoise density and distribution in Dutch waters. Surveys were conducted following standard line transect distance sampling methodology on tracklines providing a representative coverage of the study ...
Scheidat, M., Verdaat, J.P.
core   +1 more source

Seasonal and Diurnal Patterns of Harbor Porpoise (Phocoena phocoena) Behavior and the Disruptive Effects of Vessel Presence in a High‐Traffic Coastal Habitat

Marine Mammal Science, Volume 42, Issue 2, April 2026.
ABSTRACT Chronic anthropogenic activity is an ongoing threat to the marine environment and presents unique challenges in shallow, coastal habitats where harbor porpoises reside. Harbor porpoises have high metabolic needs and are highly susceptible to negative environmental factors; however, no long‐term studies have been conducted on wild populations ...
Rachel L. Lennon, Shannon Merkle, Jonas Teilmann, Lorenzo Scala, Chris Pierpoint, Victoria Hobson   +5 more
wiley   +1 more source