Results 111 to 120 of about 6,684 (211)

Lista patrón de los tiburones, rayas y quimeras (Chondrichthyes, Elasmobranchii, Holocephali) de México [PDF]

open access: yesArxius de Miscel-lània Zoològica, 2016
Checklist of sharks, rays and chimaeras (Chondrichthyes, Elasmobranchii, Holocephali) from Mexico We present an annotated checklist of the species of sharks, rays and chimaeras (chondrichthyan fishes) occurring in Mexican waters, based on a thorough ...
Del Moral-Flores, L. F.   +4 more
doaj  

The status of shark and ray fishery resources in the Gulf of California: applied research to improve management and conservation [PDF]

open access: yes, 2009
Seasonal surveys were conducted during 1998–1999 in Baja California, Baja California Sur, Sonora, and Sinaloa to determine the extent and activities of artisanal elasmobranch fisheries in the Gulf of California. One hundred and forty–seven fishing sites,
Bizzarro, Joseph J.   +7 more
core  

A marginal marine fauna from the upper Dinosaur Park Formation, Canada

open access: yesVertebrate Anatomy, Morphology, Palaeontology
During the Late Cretaceous, the coastline of the epicontinental Western Interior Seaway in North America fluctuated in position, temporarily replacing some terrestrial ecosystems with shallow marine habitats.
Luke Nelson   +4 more
doaj   +1 more source

Length-weight relationship of 73 fish species caught in the southeastern inner continental shelf region of Brazil

open access: yesLatin American Journal of Aquatic Research, 2014
The a and b parameters of the length-weight relationship (LWR) of the form W = aLb were estimated for 71 species of Actinopterygii and 2 Elasmobranchii, caught in the coastal region and inner shelf of southeastern Brazil. Estimates of b varied from 2.151
June F Dias   +2 more
doaj  

Three-dimensional fossils of a Cretaceous collared carpet shark (Parascylliidae, Orectolobiformes) shed light on skeletal evolution in galeomorphs

open access: yesRoyal Society Open Science
A rich fossil record of teeth shows that many living shark families’ origins lie deep in the Mesozoic. Skeletal fossils of the sharks to whom these teeth belonged are far rarer and when they are preserved are often flattened, hindering understanding of ...
Richard P. Dearden   +7 more
doaj   +1 more source

The taxonomic value of rostral nodes of extinct sharks, with comments on previous records of the genus Lamna (Lamniformes, Lamnidae) from the Pliocene of Lee Creek Mine, North Carolina (USA) [PDF]

open access: yes, 2012
Shark rostral nodes from the Yorktown Formation (Zanclean, early Pliocene) of Lee Creek Mine, North Carolina (USA), previously assigned to the genus Lamna Cuvier, 1816, have been reinterpreted using a preliminary identification key for extant Lamniformes
Jagt, J.W.M., Mollen, F.H.
core  

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