Results 51 to 60 of about 810,953 (233)

A new 3-D modelling method to extract subtransect dimensions from underwater videos [PDF]

, 2012
Underwater video transects have become a common tool for quantitative analysis of the seafloor. However a major difficulty remains in the accurate determination of the area surveyed as underwater navigation can be unreliable and image scaling does not ...
Fillinger, Laura, Funke, Tobias
core   +2 more sources

A atividade pesqueira artesanal e suas interações com a megafauna marinha: implicações para a conservação de espécies ameaçadas

Desenvolvimento e Meio Ambiente, 2023
Marine megafauna is of intrinsic importance to ecosystems, but it also provides essential services for ocean health and resilience through ecological roles in the structure and dynamics of marine communities.
Angela Zaccaron da Silva, Hugo Bornatowski, Camila Domit   +2 more
doaj   +1 more source

The importance of sample size in marine megafauna tagging studies [PDF]

Ecological Applications, 2019
AbstractTelemetry is a key, widely used tool to understand marine megafauna distribution, habitat use, behavior, and physiology; however, a critical question remains: “How many animals should be tracked to acquire meaningful data sets?” This question has wide‐ranging implications including considerations of statistical power, animal ethics, logistics ...
Sequeira, A. M. M., Heupel, M. R., Lea, M.‐A., Eguíluz, V. M., Duarte, C. M., Meekan, M. G., Thums, M., Calich, H. J., Carmichael, R. H., Costa, D. P., Ferreira, L. C., Fernandéz‐gracia, J., Harcourt, R., Harrison, A.‐l., Jonsen, I., Mcmahon, C. R., Sims, D. W., Wilson, R. P., Hays, G. C.   +18 more
openaire   +6 more sources

Using Drone Footage to Analyze the Effect of Diver Presence on Juvenile Manta Ray Behavior

Drones
Manta ray tourism has become a multi-million-dollar industry proposed as a conservation tool in recent decades; however, its impacts remain unclear. We use drones and Markov models to quantify the effects of diver presence on a juvenile population of the
Miguel de Jesús Gómez-García, Amanda L. O’Brien, Jessica H. Pate   +2 more
doaj   +1 more source

Drone Up! Quantifying Whale Behavior From a New Perspective Improves Observational Capacity

Frontiers in Marine Science, 2018
During traditional boat-based surveys of marine megafauna, behavioral observations are typically limited to records of animal surfacings obtained from a horizontal perspective.
Leigh G. Torres, Sharon L. Nieukirk, Leila Lemos, Todd E. Chandler   +3 more
doaj   +1 more source

Intra‐ and inter‐annual variation in gray whale body condition on a foraging ground

Ecosphere, 2020
Baleen whales store energy gained on foraging grounds to support reproduction and other metabolic needs while fasting for long periods during migration.
Leila Soledade Lemos, Jonathan D. Burnett, Todd E. Chandler, James L. Sumich, Leigh G. Torres   +4 more
doaj   +1 more source

Understanding individual and population-level effects of plastic pollution on marine megafauna

Endangered Species Research, 2020
Plastic pollution is increasing rapidly throughout the world’s oceans and is considered a major threat to marine wildlife and ecosystems. Although known to cause lethal or sub-lethal effects to vulnerable marine megafauna, population-level impacts of ...
Senko, JF, Nelms, SE, Reavis, JL, Witherington, B, Godley, BJ, Wallace, BP   +5 more
doaj   +1 more source

Inter-laboratory ring test for environmental DNA extraction protocols: implications for marine megafauna detection using three novel qPCR assays

Metabarcoding and Metagenomics
The comparability of methods applied to environmental DNA (eDNA) samples across laboratories remains a significant challenge for biodiversity monitoring on a global scale.
L. K. Rodriguez, Lorenzo De Bonis, Jack McKee, James A. McKenna, T. Urvois, Eleonora Barbaccia, Eileen Dillane, C. Lanfredi, Helene Hjellnes, Armelle Jung, Enrico Villa, A. Azzellino, Jon‐Ivar Westgaard, E. Quéméré, B. Thalinger   +14 more
semanticscholar   +1 more source

From sea monsters to charismatic megafauna: Changes in perception and use of large marine animals.

PLoS ONE, 2019
Marine megafauna has always elicited contrasting feelings. In the past, large marine animals were often depicted as fantastic mythological creatures and dangerous monsters, while also arousing human curiosity.
Carlotta Mazzoldi, Giovanni Bearzi, Cristina Brito, Inês Carvalho, Elena Desiderà, Lara Endrizzi, Luis Freitas, Eva Giacomello, Ioannis Giovos, Paolo Guidetti, Adriana Ressurreição, Malcolm Tull, Alison MacDiarmid   +12 more
doaj   +1 more source

Acoustic Telemetry Around Western Australia’s Oil and Gas Infrastructure Helps Detect the Presence of an Elusive and Endangered Migratory Giant

Frontiers in Marine Science, 2021
Subsea infrastructure of the oil and gas industry attracts commercial fish species as well as megafauna including sea lions, turtles, sharks and whales. Potential impacts of this attraction, whether positive or negative, are unknown.
Paul G. Thomson, Paul G. Thomson, Richard Pillans, Fabrice R. A. Jaine, Fabrice R. A. Jaine, Robert G. Harcourt, Robert G. Harcourt, Michael D. Taylor, Michael D. Taylor, Charitha B. Pattiaratchi, Charitha B. Pattiaratchi, Dianne L. McLean, Dianne L. McLean   +12 more
doaj   +1 more source