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Collapse of the world’s largest herbivores
The rate of large herbivore decline suggests that ever-larger swaths of the world will soon lack many of the vital ecological services these animals provide, resulting in enormous ecological and social costs.
The Borophaginae are found to be intermediate in morphology between the Caninae and Hyaeninae, and like hyaenids, the borophagines had significantly stronger jaws and enhanced jaw muscle leverage compared to other canids.
Cope's Rule, Hypercarnivory, and Extinction in North American Canids
It is argued that energetic constraints and pervasive selection for larger size (Cope's rule) in carnivores lead to dietary specialization (hypercarnivory) and increased vulnerability to extinction and selection for attributes that promoted individual success resulted in progressive evolutionary failure of their clades.
Deja vu: the evolution of feeding morphologies in the Carnivora.
- B. Van Valkenburgh
- Environmental Science, GeographyIntegrative and comparative biology
A survey of the fossil record indicates that large hypercarnivores evolve frequently, often in response to ecological opportunity afforded by the decline or extinction of previously dominant hyperc Carnivorous taxa.
Anatomy of STEM teaching in North American universities
A major step toward a characterization of STEM teaching practices in North American universities is reported based on classroom observations from over 2000 classes taught by more than 500 STEM faculty members across 25 institutions.
Molecular distance and divergence time in carnivores and primates.
The results suggest that estimates of molecular distance and divergence time are highly correlated and that rates of molecular evolution are not constant; rather, in general they decline with increasing divergence time in a linear fashion.
Molecular systematics of the Hyaenidae: relationships of a relictual lineage resolved by a molecular supermatrix.
Skeletal indicators of locomotor adaptations in living and extinct rodents
Ecomorphological analyses of various locomotor types revealed consistent differences in postcranial skeletal morphology that relate to functionally important traits, suggesting that the method could be applied to extinct rodents, regardless of ancestry, to accurately infer their locomotor ecologies.
SEXUAL DIMORPHISM, SOCIAL BEHAVIOR, AND INTRASEXUAL COMPETITION IN LARGE PLEISTOCENE CARNIVORANS
Estimation of level of sexual dimorphism in skull length, canine tooth size, and lower molar length for two extinct species, the dire wolf, Canis dirus, and the sabertooth cat, Smilodon fatalis indicate that dire wolves were similar to most canids in their low level ofSexual Dimorphism, suggesting a pair-bonded breeding structure.
Aquatic adaptations in the nose of carnivorans: evidence from the turbinates
- B. Van Valkenburgh, A. Curtis, G. Slater
- Environmental Science, BiologyJournal of anatomy
- 1 March 2011
Using phylogenetic comparative methods, strong support for convergence on 1 : 3 proportions in aquatic taxa and near the inverse in terrestrial taxa is found, indicating that aquatic mustelids and pinnipeds independently acquired similar proportions of olfactory to respiratory turbinates.