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Protein Evolution in Different Cellular Environments: Cytochrome b in Sharks and Mammals’
Cellular Environment Sharks and Mammals’
2015/12/17
DNA sequences for the mitochondrial cytochrome b gene were determined for 13
species of sharks. Rates and patterns of amino acid replacement are compared for
sharks and mammals. Absolute rates of ...
Rapid Subsurface Ocean Warming in the Bay of Fundy as Measured by Free-Swimming Basking Sharks
Measured Free-Swimming Basking Sharks
2015/7/17
It is widely recognized that the western North Atlantic has recently warmed very rapidly. Sea surface temperatures (SST) in 2012 were measured to be 1–3°C higher than the 1982–2011 average (Mills et a...
Chasing Science At Sea: Racing Hurricanes, Stalking Sharks, and Living Undersea with Ocean Experts
Racing Hurricanes Stalking Sharks
2015/7/3
All marine scientists who work in the field have them—personal stories of amazement, discovery, awe, excitement, and even danger while conducting research. They are the stories we love to tell to frie...
Swimming with Sharks:Technology Ventures,Defense Mechanisms and Corporate Relationships
Swimming with Sharks Technology Ventures Defense Mechanisms Corporate Relationships
2015/7/3
This paper focuses on the tension that firms face between the need for resources from partners and the potentially damaging misappropriation of their own resources by corporate “sharks.” Taking an ent...
Grader of the Lost Sharks:Warren Buckland Considers Spielberg’s Overlooked ‘Monster’Movies
Lost Sharks Warren Buckland ‘Monster’Movies
2009/11/25
Warren Buckland opens his perceptive monograph on Steven Spielberg’s blockbusters by
explaining what it is not. Neither biography, production history, nor even an interpretative
analysis of Spielber...
Contribution of Eocene sharks and rays from southern France to the history of deep-sea selachians
SW France Eocene Deep-sea selachians Fossil record
2009/10/20
Fossil deep-sea selachians are rare and their diversity underestimated as a consequence of the scarcity of available outcrops of sediments containing them. Here we report a new fossil locality from th...
Anew species of extinct bullhead sharks,Paracestracion viohli sp. nov.(Neoselachii, Heterodontiformes),from the Upper Jurassic of South Germany
Heterodontidae Late Jurassic Schamhaupten Diversity
2009/10/20
The early history of heterodontid sharks is documented mainly by isolated teeth. So far, three different heterodontid genera have been recorded from the Jurassic: Proheterodontus from theMiddle Jurass...
Interrelationships of Mesozoic hybodont sharks as indicated by dental morphology preliminary results
Hybodont sharks Tooth morphology Dentition Mesozoic Phylogeny
2009/10/20
As many hybodont sharks are known solely from their teeth, this investigation approaches the phylogeny of the group with an emphasis on tooth morphology and dentitional patterns. The preliminary resul...
Mesozoic hybodont sharks from Asia and their relationships to the genus Ptychodus
Jurassic Cretaceous Hybodontiformes Ptychodontidae Asia
2009/10/20
The affinities of the selachian genus Ptychodus is discussed and Hemiptychodus is here re-introduced as a subgenus characterized by unusual tooth ornamentation pattern.An overview ofAsian hybodont gen...
Early Frasnian sharks from central Iran
Chondrichthyes Teeth Scales Omalodontiformes Phoebodontiformes
2009/10/20
Two limestone bone-beds in the early Frasnian of the Chahriseh section, central Iran, yielded numerous chondrichthyan teeth and scales. The fauna includes, most probably, only two taxa: a hitherto unk...
Upper Frasnian rocks of Utah and Nevada yielded several multicuspid, low-crowned shark teeth. It is proposed that they were used mainly for filtering food from water. Two new chondrichthyan species be...
A new occurrence of sharks in the Menilite Formation (Lower Oligocene) from the Outer (Flysch) Carpathians of Poland
Hexanchoid sharks “Notidanus” Heptranchias Menilite shales/Formation Outer Carpathians
2009/10/20
Bieńkowska-wasiluk, M. and radwański, A. 2009. A new occurrence of sharks in the Menilite Formation (Lower Oligocene) from the Outer (Flysch) Carpathians of Poland. Acta Geologica Polonica, 59 (2), 23...
Diving with Captive Sharks
safety animal shark captivity
2009/5/6
For more than half a century, elasmobranchs have been placed on exhibit at aquariums and held in captive conditions for purposes of education and research. Much is still unknown about many species of...
Diver Eco-Tourism and the Behavior of Reef Sharks and Rays–an Overview
conservation ecology animal sharks elasmobranch
2009/5/6
This paper addresses the issue of the expanding tourist dive industry that is focused on seeing sharks and other elasmobranchs. The two competing approaches involve baiting and feeding sharks and rays...