Results 71 to 80 of about 810,953 (233)

Assessment of a non-invasive approach to pregnancy diagnosis in gray whales through drone-based photogrammetry and faecal hormone analysis

open access: yesRoyal Society Open Science, 2023
Knowledge of baleen whales' reproductive physiology is limited and requires long-term individual-based studies and innovative tools. We used 6 years of individual-level data on the Pacific Coast Feeding Group gray whales to evaluate the utility of faecal
A. Fernandez Ajó   +9 more
doaj   +1 more source

Cold-water coral reef frameworks, megafaunal communities and evidence for coral carbonate mounds on the Hatton Bank, north east Atlantic [PDF]

open access: yes, 2008
Offshore banks and seamounts sustain diverse megafaunal communities, including framework reefs formed by cold-water corals. Few studies have quantified environmental effects on the alpha or beta diversity of these communities.
Hartley, J.P.   +3 more
core   +1 more source

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

open access: yesRemote 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   +2 more
wiley   +1 more source

Mercury levels in humpback whales, and other Southern Ocean marine megafauna

open access: yesMarine Pollution Bulletin, 2021
Mercury is a known potent neurotoxin. The biogeochemical cycle of mercury in the remote Antarctic region is still poorly understood, with Polar climate change contributing added complexity. Longitudinal biomonitoring of mercury accumulation in Antarctic marine megafauna can contribute top-down insight into the bio-physical drivers of wildlife exposure.
Bengtson Nash, S.M.   +4 more
openaire   +5 more sources

Exploring indirect effects of a classic trophic cascade between urchins and kelp on zooplankton and whales

open access: yesScientific Reports
Kelp forest trophic cascades have been extensively researched, yet indirect effects to the zooplankton prey base and gray whales have not been explored. We investigate the correlative patterns of a trophic cascade between bull kelp and purple sea urchins
Lisa Hildebrand   +3 more
doaj   +1 more source

Temporal and spatial lags between wind, coastal upwelling, and blue whale occurrence

open access: yesScientific Reports, 2021
Understanding relationships between physical drivers and biological response is central to advancing ecological knowledge. Wind is the physical forcing mechanism in coastal upwelling systems, however lags between wind input and biological responses are ...
Dawn R. Barlow   +4 more
doaj   +1 more source

A Systematic Review on Challenges and Conservation Strategies for Marine Megafauna

open access: yesInternational Journal of Environment and Climate Change, 2023
Marine megafauna play pivotal roles in oceanic ecosystems, contributing to their health, functionality, and biodiversity. These species are facing escalating threats, from direct harms such as overhunting to indirect pressures like habitat degradation ...

semanticscholar   +1 more source

Incorporating environmental DNA metabarcoding for improved benthic biodiversity and habitat mapping

open access: yesRemote Sensing in Ecology and Conservation, EarlyView.
Seafloor imagery is commonly used to collect information about the distribution of benthic organisms in order to generate habitat and biodiversity maps. Recent advances in genomics (e.g., environmental DNA; eDNA) show potential to complement video surveys for habitat mapping, but there have been few examples testing this.
Rylan J. Command   +8 more
wiley   +1 more source

Rethinking Trade-Driven Extinction Risk in Marine and Terrestrial Megafauna [PDF]

open access: yesCurrent Biology, 2016
Large animals hunted for the high value of their parts (e.g., elephant ivory and shark fins) are at risk of extinction due to both intensive international trade pressure and intrinsic biological sensitivity. However, the relative role of trade, particularly in non-perishable products, and biological factors in driving extinction risk is not well ...
Loren, McClenachan   +2 more
openaire   +2 more sources

Biodiversity research requires more motors in air, water and on land

open access: yesMethods in Ecology and Evolution, EarlyView.
Abstract Human activities have accelerated species extinctions, driving rapid biodiversity decline. Simultaneously, advancements in Artificial Intelligence (AI) and autonomous systems offer transformative potential for biodiversity research. Uncrewed vehicles—drones (aerial systems) and other robots (ground and underwater platforms)—equipped with high ...
Man Qi   +8 more
wiley   +1 more source

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