Results 141 to 150 of about 21,186 (271)

The eyes of suckermouth armoured catfish (Loricariidae, subfamily Hypostomus): pupil response, lenticular longitudinal spherical aberration and retinal topography [PDF]

, 2002
The dilated, round pupils of a species of suckermouth armoured catfish (Liposarcus pardalis) constrict slowly on illumination (over 35-40 min) to form crescent-shaped apertures. Ray tracing of He-Ne laser beams shows that the lenses of a related species (
Collin, S. P., Corrigan, J., Douglas, R. H.   +2 more
core  

Passive Gauze‐Based eDNA Sampler Proves Efficient and Cost‐Effective in the Marine Environment

Environmental DNA, Volume 8, Issue 2, March/April 2026.
Here, we present the first empirical comparison of the metaprobe 2.0, a low‐cost, passive eDNA sampler, against an industry standard Sterivex filtration method using dip‐collected 1‐L water samples (“water bottles”). Across 14 joint deployments, we assessed detection and quantification of eDNA of two elasmobranch and two teleost species. While Sterivex
Molly M. Kressler, Lucy Whitelegg, Benedict Tutt‐Leppard, Andrew Matthews, Dave Hudson, Richard B. Sherley   +5 more
wiley   +1 more source

Zoogeography of Elasmobranchs in the Colombian Pacific Ocean and Caribbean Sea

Neotropical Ichthyology
In order to investigate zoogeographical patterns of the marine elasmobranch species of Colombia, species richness of the Pacific and Caribbean and their subareas (Coastal Pacific, Oceanic Pacific, Coastal Caribbean, Oceanic Caribbean) was analyzed.
Andrés Felipe Navia, Paola Andrea Mejía-Falla, José Sergio Hleap   +2 more
doaj   +1 more source

Behavioral Evidence of Predator–Predator Commensalism: Cobia Track and Feed on Prey Disturbed by Southern Stingrays

Ethology, Volume 132, Issue 3, Page 225-234, March 2026.
We documented a novel predator–predator commensal foraging interaction between cobia (Rachycentron canadum) and a southern stingray (Hypanus americanus) in a shallow coastal habitat of Biscayne Bay, Florida. Using drone‐based observations, we recorded a 7‐min sequence in which a cobia closely tracked the stingray's movements and fed on prey disturbed ...
Julia Saltzman, John Hlavin, Christine Martin, Emily A. Yeager, Catherine C. Macdonald   +4 more
wiley   +1 more source

Relative abundance and use of elasmobranchs in artisanal fisheries of the Lesser Antilles

Marine and Fishery Sciences
Shark and ray populations continue to decline in many regions around the world. The contribution of artisanal fisheries to these declines remains poorly understood for many locations. A rapid assessment framework using fisheries-independent sampling and
Camila Cáceres, Lauren Ali, Oceane Beaufort, Welldon Mapp, Aljoscha Wothke, Bethan Roberts, Philip Matich, Michael Heithaus   +7 more
doaj   +1 more source

Trophic interactions among three elasmobranch species coexisting in the Oman Sea: implications for resource partitioning [PDF]

بوم‌شناسی آبزیان, 2017
In this study, trophic interactions were studied among three elasmobranches including Iago omanensis, Rhinobatos punctifer and Torpedo sinuspersici coexisting in the depth ranging from 50 to 100 meters in the Oman Sea (Sistan and Balochistan waters).
Ali Reza Rastgoo, Tooraj Valinassab
doaj  

A Conceptual Framework and Methods for Studying the Connectivity of Fishes

Fish and Fisheries, Volume 27, Issue 2, Page 342-369, March 2026.
ABSTRACT Connectivity is a multifaceted concept that has important implications for the management and conservation of marine and freshwater fishes. We developed a conceptual framework that encompasses multiple, interrelated categories of connectedness, including landscape (e.g., structural, functional) connectivity and ecological (e.g., trophic ...
Jordanna N. Bergman, Jessica A. Robichaud, Jasper McCutcheon, Michael T. Booth, Brendan Campbell, Grace A. Casselberry, Cienna R. Cooper, Bronwyn M. Gillanders, Lucas P. Griffin, Edward Hale, Luc LaRochelle, Karen J. Murchie, Mary Peacock, Reid G. Swanson, Simon D. Stewart, Ryan. J. Woodland, Daniel P. Zielinski, Steven J. Cooke, Morgan L. Piczak   +18 more
wiley   +1 more source

The reproductive cycle of the thorny skate (Amblyraja radiata) in the western Gulf of Maine [PDF]

, 2005
The thorny skate (Amblyraja radiata) is a large species of skate that is endemic to the waters of the western north Atlantic in the Gulf of Maine.
Danley, Patrick D., Elzey, Scott, Howell, W. Huntting, Jurek, Joe, Kneebone, Jeff, Sulikowski, James A., Tsang, Paul C. W.   +6 more
core  

Trouble in the Tank: A Case Report of Fatal Scuticociliate Encephalitis in a Whitetip Reef Shark (Triaenodon obesus)

Journal of Fish Diseases, Volume 49, Issue 3, March 2026.
Abstract This case report presents a recent case of scuticociliatosis in a whitetip reef shark (Triaenodon obesus), housed at a zoo (Haus des Meeres Aqua Terra Zoo, Vienna, Austria). Clinical signs such as uncoordinated swimming and body tilt were observed prior to death.
Hella Schwegler, Jeff Schreiner, Maria Prüllage, Karoline Lipnik, Astrid S. Holzer, Eva Lewisch   +5 more
wiley   +1 more source

The reproductive cycle of the thorny skate (Amblyraid radiata) in the western Gulf of Maine [PDF]

, 2005
The thorny skate (Amblyraja radiata) is a large species of skate that is endemic to the waters of the western north Atlantic in the Gulf of Maine.
Danley, Patrick D., Elzey, Scott, Howell, William Huntting, Jurek, Joe, Kneebone, Jeff, Sulikowski, James A., Tsang, Paul C.W.   +6 more
core   +1 more source