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"Dinosaurs Behavior."
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The Coevolution of Tyrannosaurus & Its Prey: Could Tyrannosaurus Chase Down & Kill a Triceratops for Lunch?
Students will analyze the coevolution of the predator—prey relationships between Tyrannosaurus rex and its prey species using analyses of animal speeds from fossilized trackways, prey-animal armaments, adaptive behaviors, bite marks on prey-animal fossils, predator—prey ratios, and scavenger competition. The students will be asked to decide whether T. rex was a predator, an opportunistic scavenger, or an obligate scavenger.
Journal Article
Uncovering dinosaur behavior : what they did and how we know
\"This book provides a generally accessible introduction to what is known about dinosaur behavior, including how scientists even study dinosaur behavior to begin with\"-- Provided by publisher.
BOOK
Ethical Issues in Electronic Commerce
This article reviews the incredible growth of electronic commerce (e-commerce) and presents ethical issues that have emerged. Security concerns, spamming, Web sites that do not carry an \"advertising\" label, cybersquatters, online marketing to children, conflicts of interest, manufacturers competing with intermediaries online, and \"dinosaurs\" are discussed. The power of the Internet to spotlight issues is noted as a significant force in providing a kind of self-regulation that supports an ethical e-commerce environment.
Journal Article
Dining with dinosaurs : a tasty guide to mesozoic munching
\"Sure you know T-Rex was the meat-eating king and brontosaurus munched on leaves, but what else was on the dino dining menu during the Mesozoic era? Meet the 'vores: carnivores, piscivores, herbivores, insectivores, \"trashivores,\" \"sunivores,\" and omnivores like us. Readers will be surprised and inspired to learn about dino diets and they'll get to explore how scientists can tell which dinosaurs ate what just from looking at fossils! Journey through artist and author Hannah Bonner's whimsical world to learn how the dinosaurs and their contemporaries bit, chewed, and soaked up their food.\"-- Provided by publisher.
BOOK
An Introduction to Dinosaurs
This chapter contains sections titled:
Dinosaurs: A Brief Background
The Scientific Definition of Dinosaurs
Characteristic Features of Dinosaurs
The Major Dinosaur Subgroups
Birds: Living Dinosaurs
The World of the Dinosaurs
Conclusions
Book Chapter
Dinosaurs don't, dinosaurs do
Dinosaurs demonstrate the wrong and right ways to interact with others.
Book
Morphology of the maxilla informs about the type of predation strategy in the evolution of Abelisauridae (Dinosauria: Theropoda)
Abelisauridae is a clade of theropods distinguished by short, ornamented skulls and strongly reduced forelimbs. They represented the most abundant predatory dinosaurs in Gondwana during the Cretaceous. Bolstered by biomechanical studies, the morphology of the skull and vertebral column of abelisaurids, have led researchers to hypothesize that Late Cretaceous forms were “specialized hunters.” Here, we use the morphology of the abelisaurid maxilla to test the inclusion of the Lower Cretaceous
Spectrovenator
within the specialized hunter category. Additionally, we analyze the diversity and disparity of the abelisaurid maxilla in a macroevolutionary context. We quantified the maxillary shape in 17 taxa using 2D geometric morphometrics and analyzed different evolutionary scenarios and trends with phylogenetic comparative methods. The results of all the analyses (phylogenetic ordination methods, Z, and R
2
comparison in phylogenetic generalized least squares, model selection, and estimated taxa-removal analysis) suggest that the hunter specialization appeared during the Early Cretaceous, revealing that Cretaceous abelisaurids can be considered specialist hunters. High levels of morphological disparity in the maxilla occurred shortly after the Cenomanian-Turonian faunistic turnover, which involved drastic changes in the South American terrestrial faunal assemblages. Moreover, the high evolutionary rates of the maxillary shape change in Abelisauridae support a shift in ecological pressures or socio-sexual mechanisms, which were the main drivers of the evolution of the clade rostrum. Our study invites to analyze more osteological elements of the abelisaurid skull under a quantitative macroevolutionary framework to test our results more comprehensively.
Journal Article
No T. Rex in the library
A rampaging tyrannosaurus rex demonstrates to an out-of-control little girl the results of \"beastie\" behavior in the library.
Book
Morphotypes, preservation, and taphonomy of dinosaur footprints, tail traces, and swim tracks in the largest tracksite in the world: Carreras Pampa (Upper Cretaceous), Torotoro National Park, Bolivia
The Carreras Pampa tracksite in the Torotoro National Park, Bolivia, records a wealth of dinosaur tracks, tail traces, and swim tracks. In this study, we report 1321 trackways and 289 solitary tracks, totaling 16,600 theropod tracks, 280 swim trackways, totaling 1,378 swim tracks, and several trackways with tail traces. Numerous avian tracks occur locally and are associated with the theropod tracks. These tracks and trackways are located within nine study sites of the same exposed tracking surface with a total area of approximately 7485 m2. We describe eight preservation styles and 11 morphotypes for walking tracks, and three morphotypes for swim tracks. Tracks range in size from miniature to large. The range of track sizes and the diversity of morphotypes suggest that the Carreras Pampa tracksite represents a diverse group of trackmakers. Track depths vary from very shallow to very deep both within and among trackways, suggesting that the rheological conditions of the sites changed in time and space. We present estimates of the speeds, gaits, and sizes of trackmakers and propose diverse behaviors indicated by the trackways. Notably, trackways at the Carreras Pampa tracksite indicate that a significantly higher proportion of trackmakers had relative stride lengths above 2.0 compared to other sites. The trackways show a strong, bimodal orientation, probably moving along the paleocoastline. Other forms of bioturbation and fossils were found in association with the tracks. We compare our findings at the Carreras Pampa track site to those from other sites in various locations. The quality of preservation, the exceptionally high number of tracks, and the diversity of behaviors recorded make the Carreras Pampa tracksite one of the premier dinosaur track sites in the world.
Journal Article