Results 81 to 90 of about 16,008 (241)

Rhyming in the cold: first evidence of soniferous fishes in the Southern Ocean

Remote Sensing in Ecology and Conservation, EarlyView.
The acoustic ecology of Southern Ocean fishes remains unknown due to a lack of dedicated acoustic research on the fishes of this ocean. Passive acoustic monitoring data were collected at the South African sub‐Antarctic Prince Edward Islands using an underwater acoustic recorder, and towed underwater Ski‐Monkey cameras were deployed to identify fish ...
Fannie W. Shabangu, Grant van der Heever, Charles von der Meden, Hannah Truter, Stephen J. Lamberth, Ofer Gon   +5 more
wiley   +1 more source

Multi‐Platform Deployments of Low‐Cost Devices for Cetacean Passive Acoustic Monitoring

Remote Sensing in Ecology and Conservation, EarlyView.
Recent advances in affordable, user‐friendly devices offer new opportunities to overcome cost constraints of underwater passive acoustic monitoring (PAM) and expand acoustic data collection. In this study, we deployed low‐cost acoustic recorders and underwater cameras across a range of platforms in the Western Mediterranean, including fishing gear ...
Greta Jankauskaite, François Poisson, Irati Abascal, Javier Menéndez‐Blázquez, Clara Cánovas Pérez, Sofia Conti, Ricardo Sagarminaga, Juan Antonio Raga, David March   +8 more
wiley   +1 more source

Diel vertical migration of Cladocera in a compartment of a tropical reservoir

Acta Limnologica Brasiliensia, 2018
Aim This study seeks to analyze the vertical migration pattern of Cladocera species as related with the physical and chemical parameters of the water.
Erika dos Santos Silva, Odete Rocha, Maria José dos Santos-Wisniewski   +2 more
doaj   +1 more source

Shark predation on migrating adult American eels (Anguilla rostrata) in the Gulf of St. Lawrence. [PDF]

PLoS ONE, 2012
In an attempt to document the migratory pathways and the environmental conditions encountered by American eels during their oceanic migration to the Sargasso Sea, we tagged eight silver eels with miniature satellite pop-up tags during their migration ...
Mélanie Béguer-Pon, José Benchetrit, Martin Castonguay, Kim Aarestrup, Steven E Campana, Michael J W Stokesbury, Julian J Dodson   +6 more
doaj   +1 more source

Shedding light on the dark: Does artificial illumination affect mammal activity at waterholes in sub‐Saharan Africa?

Conservation Science and Practice, EarlyView.
We experimentally evaluated the effects of artificial lighting on mammal visitation patterns at waterholes in north‐central Namibia using motion‐activated camera traps across two dry seasons. Lighting had minimal effects on most species, although gemsboks increased use of artificially lit waterholes and lions reduced nocturnal activity at illuminated ...
Jessica R. Patterson, Stéphanie Périquet‐Pearce, James C. Beasley   +2 more
wiley   +1 more source

Phytoplankton Tune Local pH to Actively Modulate Circadian Gravitactic Behavior

Advanced Physics Research
Diel vertical migration (DVM) is the daily movement of motile phytoplankton between light‐rich surface waters and deeper nutrient‐rich layers, typically governed by internal clocks. However, many species show irregular patterns that deviate from expected
Arkajyoti Ghoshal, Soumitree Mishra, Jayabrata Dhar, Hans‐Peter Grossart, Anupam Sengupta   +4 more
doaj   +1 more source

Deep Dark Futures: Foresighting Human Impacts on Mesopelagic Ecosystem Services

Fish and Fisheries, EarlyView.
This study uses foresighting to explore four plausible future scenarios of human activity affecting mesopelagic ecosystem services; provisioning, regulating, supporting and cultural. Using participatory scenario development, qualitative network modelling and indicator design, we assess systemic risks and early warning signals linked to harvest, climate
Ben Scoulding, Alistair J. Hobday, Rowan Trebilco, Heidi Pethybridge, Ingrid van Putten, Katherine Baker, Karen Evans, David Green, Eriko Hoshino, Haris Kunnath, Clothilde Langlais, Tim P. Lynch, Javier Porobic, Tyler Rohr, Elizabeth H. Shadwick, Caroline A. Sutton, Jodie Van de Kamp, Briannyn Woods, Bowen Zhang   +18 more
wiley   +1 more source

Uncovering intra-daily intertidal biofilm dynamics in a shorebird foraging hotspot with hourly UAV multispectral imagery acquisitions

International Journal of Applied Earth Observations and Geoinformation
Estuarine mudflats are colonized by biofilm-forming microphytobenthos (MPB), which support primary production, stabilize sediment, and provide critical food for benthic invertebrates and shorebirds.
Tristan J. Douglas, Nicholas C. Coops, Mark C. Drever, Brian P.V. Hunt, Tara G. Martin, Robert W. Elner   +5 more
doaj   +1 more source

The influence of sea ice, wind speed and marine mammals on Southern Ocean ambient sound [PDF]

Royal Society Open Science, 2017
This paper describes the natural variability of ambient sound in the Southern Ocean, an acoustically pristine marine mammal habitat. Over a 3-year period, two autonomous recorders were moored along the Greenwich meridian to collect underwater passive ...
Sebastian Menze, Daniel P. Zitterbart, Ilse van Opzeeland, Olaf Boebel   +3 more
doaj   +1 more source

Diel variation in vertical distribution of an offshore ichthyoplankton community off the Oregon coast [PDF]

, 2007
We examined the diel ver-tical distribution, concentration, and community structure of ichthyoplank-ton from a single station 69 km off the central Oregon coast in the northeast Pacific Ocean. The 74 depth-stratified samples yielded 1571 fish larvae from
Auth, Toby D., Brodeur, Richard D., Fisher, Kathleen M.   +2 more
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