Results 61 to 70 of about 735 (168)

Temporal changes in the dietary niche of sympatric seals provides insight into the role of competition in population declines

Oikos, Volume 2026, Issue 6, June 2026.
Competition theory suggests that interspecific prey competition can result in changes to the dietary niche, but obtaining timeseries of data from sympatric species experiencing temporal variation in competition is challenging. Scotland is an important area for two species of seals, but over the past 20 years, populations of harbour seals Phoca vitulina
Izzy Langley, Philip S. Hammond, Paul M. Thompson, Graham J. Pierce, Lindsay J. Wilson, Ailsa J. Hall, Gordon D. Hastie, Debbie J. F. Russell   +7 more
wiley   +1 more source

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

Remote Sensing in Ecology and Conservation, Volume 12, Issue 3, Page 368-387, June 2026.
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

Exploring the effects of methodological choices on the estimation and biological interpretation of life history parameters for harbour porpoises in Norway and beyond.

PLoS ONE
This study investigates effects of subtle methodological choices on the estimation and biological interpretation of age, growth and reproductive parameters for harbour porpoises.
Anne Kirstine Frie, Ulf Lindström
doaj   +1 more source

Whole Genome Analyses of the Endangered Northern Abalone (Haliotis kamtschatkana) Reveal Population Differentiation and a Genomic Signature of a Dramatic Population Decline

Evolutionary Applications, Volume 19, Issue 6, June 2026.
ABSTRACT Despite widespread declines of many wildlife species, the effects of population decline on the genome and the recovery potential of affected species are still poorly understood, especially beyond a few charismatic species. The Northern abalone (or Pinto abalone; Haliotis kamtschatkana) is a marine gastropod mollusk of social, cultural and ...
Anna Tigano, Erin C. Herder, Kayla Long, Janine Supernault, Daniel L. Curtis, S. Christine Hansen, Mackenzie D. Mazur, Eric B. Rondeau, Dominique Bureau   +8 more
wiley   +1 more source

Seasonal dynamics of occurrence and group size of three species of cetaceans (Delphinidae and Phocoenidae) on the southwestern coast of the Black Sea

Scientia Marina, 2020
The spatial and temporal occurrence of cetaceans in the Black Sea and particularly along its southwestern coastline is poorly studied. Based on a total of 609 encounters, we present the analysis of monthly dynamics of (1) the numbers of cetacean ...
Nastassia Uluduz, Alexey Yanchukov, Mustafa Sözen   +2 more
doaj   +1 more source

The Importance of Individual Body Condition in Mammalian Behavioural Responses to Disturbance

Mammal Review, Volume 56, Issue 2, June 2026.
Body condition, shaped by the balance between energy demands and reserves, predictably shapes mammalian disturbance responses. Poor‐condition individuals adopt needs‐based strategies, accepting greater risks to meet immediate energetic needs, while good‐condition individuals follow asset‐protection strategies, minimizing risks to protect their survival
Valeria Perez‐Marrufo, Lesley Thorne, Susan E. Parks   +2 more
wiley   +1 more source

Whole‐Genome‐Sequencing Reveals Demographic History and Patterns of Parallel Adaptive Evolution in Indo‐Pacific Bottlenose Dolphins (Tursiops aduncus) Across Coastal Australian Seascapes

Molecular Ecology, Volume 35, Issue 11, June 2026.
ABSTRACT Understanding how demographic dynamics interact with environmental heterogeneity is central to explaining patterns of genomic variation in the marine realm. Indo‐Pacific bottlenose dolphins (Tursiops aduncus) occur along most of the Australian coastline, from tropical to temperate waters, encompassing pronounced differences in temperature ...
Svenja M. Marfurt, Adrien Tran Lu Y, Benjamin Dauphin, Manuela R. Bizzozzero, Masaomi Hatakeyama, Delphine B. H. Chabanne, Simon J. Allen, Felix Smith, Guido J. Parra, Michael Krützen   +9 more
wiley   +1 more source

Climate change causing starvation in harbour porpoises? [PDF]

Biology Letters, 2007
Recently, [MacLeod et al . (2007)][1] analysed data from harbour porpoises ( Phocoena phocoena ) stranded on Scottish North Sea coasts in March–May of 1993–2003. Comparing 2002–2003 data against baseline data from previous years, they suggest that reductions in sandeel prey have increased ...
Thompson, Paul, Wilson, Ben, Ingram, Simon, Lonergan, Mike, Northridge, Simon, Hall, Ailsa   +5 more
openaire   +3 more sources

Preserving an Imperiled Porpoise Through Pixels: Digitization of a Vaquita (Phocoena sinus) Skeleton, the World's Most Endangered Marine Mammal

Marine Mammal Science, Volume 42, Issue 3, July 2026.
Jamie L. Knaub, Brittany A. Dolan, Philip Unitt, Robert L. Brownell Jr., Tricia L. Meredith, Marianne E. Porter   +5 more
wiley   +1 more source

Assessing drivers of habitat use by dolphins at dynamic oceanographic features to inform conservation management

Ecosphere, Volume 17, Issue 5, May 2026.
Abstract Estuaries host important populations of marine megafauna. These environments provide shelter from the open ocean alongside a myriad of bathy‐hydographic features where interactions between topography and tidal flows may enhance foraging opportunities.
S. L. Cox, P. J. Hosegood, C. B. Embling, A. M. Englund, M. Garagouni, E. Rogan, S. C. Votier, S. N. Ingram   +7 more
wiley   +1 more source