Results 21 to 30 of about 291,043 (410)

Snakes, shapes, and gradient vector flow

open access: yesIEEE Transactions on Image Processing, 1998
Snakes, or active contours, are used extensively in computer vision and image processing applications, particularly to locate object boundaries. Problems associated with initialization and poor convergence to boundary concavities, however, have limited ...
Chenyang Xu, Jerry L Prince
semanticscholar   +1 more source

Preferential Neuronal Responses to Snakes in the Monkey Medial Prefrontal Cortex Support an Evolutionary Origin for Ophidiophobia

open access: yesFrontiers in Behavioral Neuroscience, 2021
Ophidiophobia (snake phobia) is one of the most common specific phobias. It has been proposed that specific phobia may have an evolutionary origin, and that attentional bias to specific items may promote the onset of phobia.
Ha Trong Dinh   +13 more
doaj   +1 more source

A STUDY OF THE DEFENSIVE BEHAVIORS OF FREE-RANGING DEKAY’S BROWNSNAKES, STORERIA DEKAYI (HOLBROOK, 1836) [PDF]

open access: yes, 2015
The defensive behaviors of free-ranging Dekay’s Brownsnakes, Storeria dekayi, were studied at a site in Erie County, Pennsylvania, USA. Twenty-nine unique sequences of defensive behavior were documented.
Gray, Brian S.
core   +2 more sources

A phylogeny and revised classification of Squamata, including 4161 species of lizards and snakes

open access: yesBMC Evolutionary Biology, 2013
BackgroundThe extant squamates (>9400 known species of lizards and snakes) are one of the most diverse and conspicuous radiations of terrestrial vertebrates, but no studies have attempted to reconstruct a phylogeny for the group with large-scale taxon ...
R. A. Pyron, F. Burbrink, J. Wiens
semanticscholar   +1 more source

Snake prices and crocodile appetites: Aquatic wildlife supply and demand on Tonle Sap Lake, Cambodia [PDF]

open access: yes, 2010
Commercial trade is a major driver of over-exploitation of wild species, but the pattern of demand and how it responds to changes in supply is poorly understood.
Berkes   +45 more
core   +1 more source

Large-scale molecular phylogeny, morphology, divergence-time estimation, and the fossil record of advanced caenophidian snakes (Squamata: Serpentes)

open access: yesPLoS ONE, 2019
Caenophidian snakes include the file snake genus Acrochordus and advanced colubroidean snakes that radiated mainly during the Neogene. Although caenophidian snakes are a well-supported clade, their inferred affinities, based either on molecular or ...
H. Zaher   +11 more
semanticscholar   +1 more source

The elusive scleral cartilages: Comparative anatomy and development in teleosts and avians

open access: yesThe Anatomical Record, EarlyView., 2023
Abstract The sclera of all vertebrate eyes is comprised of connective tissue, with some organisms developing cartilage within this tissue. A review of the cartilages that have been described in the vertebrate sclera and their anatomical relationships is discussed together with their potential homology.
Tamara A. Franz‐Odendaal
wiley   +1 more source

Addressing Wallacean shortfall using small sampling approach: a case study with endemic Lycodon flavicollis (Squamata: Colubridae) Mukherjee & Bhupathy, 2007

open access: yesJournal of Asia-Pacific Biodiversity, 2021
Delineating species distribution comprising information on habitat suitability is vital for developing conservation strategies. Like many other snake species, Lycodon flavicollis is a poorly studied peninsular Indian endemic species known only from few ...
Sanath Krishna Muliya   +7 more
doaj  

Swift-Hohenberg equation with broken reflection symmetry [PDF]

open access: yes, 2009
The bistable Swift-Hohenberg equation possesses a variety of time-independent spatially localized solutions organized in the so-called snakes-and-ladders structure.
Burke, J., Houghton, S.M., Knobloch, E.
core   +1 more source

Beyond the ‘big four’: Venom profiling of the medically important yet neglected Indian snakes reveals disturbing antivenom deficiencies

open access: yesPLoS Neglected Tropical Diseases, 2019
Background Snakebite in India causes the highest annual rates of death (46,000) and disability (140,000) than any other country. Antivenom is the mainstay treatment of snakebite, whose manufacturing protocols, in essence, have remained unchanged for over
R. R. Senji Laxme   +7 more
semanticscholar   +1 more source

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