Results 191 to 200 of about 13,756 (223)

Sharks and Rays of Northern Australia's Roper River, with a Range Extension for the Threatened Speartooth Shark Glyphis glyphis. [PDF]

Animals (Basel)
Constance JM, Garcia EA, Yugul Mangi Rangers, Davies CL, Kyne PM.   +4 more
europepmc   +1 more source

A decade of submersible observations revealed temporal trends in elasmobranchs in a remote island of the Eastern Tropical Pacific Ocean. [PDF]

Sci Rep
Espinoza M, Quesada-Perez F, Madrigal-Mora S, Naranjo-Elizondo B, Clarke TM, Cortés J.   +5 more
europepmc   +1 more source

Interspecific Associations of the Rare and Endangered Stingray (<i>Styracura schmardae</i>) in Caribbean Sandy-Bottom Habitats. [PDF]

Ecol Evol
de Carvalho-Souza GF, Sparaventi E, Echeverría-Sáenz S.   +2 more
europepmc   +1 more source

DNA-based characterization of rays (Elasmobranchii: Batoidea) from Bangladesh using mitochondrial markers: Implications for conservation and management. [PDF]

PLoS One
Mahjabin M, Datta SK, Labib AF, Akhter S, Antu DR, Ahmed MS.   +5 more
europepmc   +1 more source

Analysis of the Entire Mitogenome of the Threatened Freshwater Stingray <i>Potamotrygon leopoldi</i> (Myliobatiformes: Potamotrygonidae) and Comprehensive Phylogenetic Assessment in the Xingu River, Brazilian Amazon. [PDF]

Int J Mol Sci
Guerreiro SLM, Vidal AF, Silva CS, Cavalcante GC, Magalhães L, Gomes DHF, Filho JCDS, Souza JES, Pires É, Oliveira G, Melo DSD, Sá ALA, Hamoy I, Ribeiro-Dos-Santos Â, Santos SEB.   +14 more
europepmc   +1 more source

Sexual Size Dimorphism in Rays and Skates (Elasmobranchii: Batoidea). [PDF]

Ecol Evol
Gayford JH, Seamone SG, Irschick DJ, Chin A, Rummer JL.   +4 more
europepmc   +1 more source

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Forebrain Organization in Elasmobranchs

Brain, Behavior and Evolution, 2012
It has long been known that many elasmobranch fishes have relatively large brains. The telencephalon, in particular, has increased in size in several groups, and as a percent of total brain weight, it is as large as in some mammals. Little is known, however, about the organization, connections, and functions of the telencephalon in elasmobranchs. Early
Michael H, Hofmann, R Glenn, Northcutt
openaire   +2 more sources

Ureogenesis in Elasmobranchs

Nature, 1958
So long ago as 1858, Staedeler and Frerichs1 discovered the presence of large amounts of urea in three species of elasmobranch fishes. Many more have been examined since that time, and it is known to-day that many, and probably all marine, elasmobranchs, including the Holocephali, contain 2–2.5 per cent of urea in their blood and tissues.
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The elasmobranch pupillary response

Vision Research, 1971
Abstract The rate and extent of the pupillary response to light and darkness were determined for a variety of sharks and rays. Dilation required 1–60 min and constriction 1–30 min, depending on the species. All responses were non-consensual. The dilator muscle was controlled by the third cranial nerve, which probably exerts a constant dilatory tonus ...
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Morphological abnormalities in elasmobranchs

Journal of Fish Biology, 2015
A total of 10 abnormal free‐swimming (i.e. post‐birth) elasmobranchs are reported from The (Persian–Arabian) Gulf, encompassing five species and including deformed heads, snouts, caudal fins and claspers. The complete absence of pelvic fins in a milk shark Rhizoprionodon acutus may be the first record in any elasmobranch. Possible causes, including the
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