Results 131 to 140 of about 12,111 (305)

Spatial distribution pattern and negative density dependence analysis of northern subtropical forest communities in Baohua Mountain

Global Ecology and Conservation
Negative density dependence (NDD) serves as a crucial regulatory mechanism for maintaining biodiversity in forest ecosystems. Testing intraspecific and interspecific competition is fundamental for understanding species coexistence.
Naiwei Li, Baocheng Wu, Xiangui Yi, Weibing Zhuang, Zhong Wang, Tao Wang   +5 more
doaj   +1 more source

Comparative cranial biomechanics reveal macroevolutionary trends in theropod dinosaurs, with emphasis on Tyrannosauroidea

The Anatomical Record, EarlyView.
Abstract Tyrannosaurus is viewed as a model organism in vertebrate paleontology, with numerous studies analyzing its feeding biomechanics. Nonetheless, the evolution of this feeding performance has been under‐addressed in Tyrannosauroidea, especially in basal tyrannosauroids. Here we used muscle‐force reconstruction and finite element analysis (FEA) to
Evan Johnson‐Ransom, Paul Gignac, Daniel E. Barta, Ryan N. Felice, Eric Snively   +4 more
wiley   +1 more source

Intraspecific and interspecific behavioral interactions in adult male Anolis sagrei and gray-throated Anolis carolinensis (Sauria : Iguanidae)

, 1988
Members of the Anolis carolinensis (Sauria: Iguanidae) complex co-occur with A. sagrei on many Caribbean islands. Where the two species occur together, A. carolinensis occupies a trunk-crown niche, whereas A.
Brown, Pamela Ruth
core  

Osteohistology of two phorusrhacids reveals uninterrupted growth strategy

The Anatomical Record, EarlyView.
Abstract Phorusrhacidae were apex predators that primarily dominated South America ecosystems for at least 40 million years with their imposing size and predatory lifestyle—yet some aspects of their biology remain poorly understood. Osteohistology is a tool for understanding growth dynamics and biomechanical adaptations.
Lotta Dreyer, Christian Cooper, Jingmai O'Connor   +2 more
wiley   +1 more source

Dynamic color change in the grouper Variola louti during interspecific interactions and swimming

Behavioral Ecology
Abstract Animals can change their body color for various ecological functions. In fish, rapid dynamic color change is primarily known in contexts of intraspecific communication and camouflage, while examples in interspecific contexts are rare. We studied dynamic color changes and their associated behaviors in the grouper Variola louti in
Sagi Marom, Moshe Kiflawi, Derya Akkaynak, Roi Holzman   +3 more
openaire   +2 more sources

Interspecific and intraspecific variability in placoid scale morphology in relation to body form variability in squaliformes

, 1993
An ontogenetic series of nine species; Centrophorus granulosus, Centroscymnus coelolepis, Dalatias licha, Deania calcea, Echinorhinus cookei, Isistius brasiliensis, Oxynotus centrina and Squalus acanthias were studied to determine swimming capabilities ...
Tabit, Christopher R.
core   +1 more source

Clade‐wide morphological and functional variation of the sauropsid columella

The Anatomical Record, EarlyView.
Abstract The columella (=stapes) is the middle ear bone of reptiles that transmits vibrations from the environment to the inner ear. It has been shown to exhibit extensive interspecific morphological disparity in several clades; however, its morphological variation and associated functional consequences remain poorly described.
John Peacock, Serjoscha W. Evers, Tiago R. Simões, Garth M. Spellman, Daniel J. Field   +4 more
wiley   +1 more source

Trophic plasticity and novel predator-prey interaction between two introduced snakes in a Mediterranean island

Acta Herpetologica
We report the first documented case of interspecific ophiophagy by the naturalised false smooth snake (Macroprotodon mauritanicus), observed preying upon the introduced horseshoe whip snake (Hemorrhois hippocrepis) in Mallorca (Balearic Islands, Spain).
Enrique Pantoja, Samuel Pinya
doaj   +1 more source

Developmental differences in cortical bone structure in chimpanzee and human femora reflect early locomotor independence in humans

The Anatomical Record, EarlyView.
Abstract The cortical bone structure of long bone diaphyses changes throughout growth via skeletal modeling and has important implications for bone strength and structural integrity. Ontogenetic trends in diaphyseal structure have been identified in both chimpanzees and humans but it is not yet clear how these trends compare given notable differences ...
Karen R. Swan, Rachel Ives, Zewdi J. Tsegai, Louise T. Humphrey   +3 more
wiley   +1 more source

PREDATOR-PREY SYSTEMS IN PEST MANAGEMENT

The use of chemical pesticides frequently causes minor pests to become serious problems by disturbing the natural controls that keep them in check. As a result, it is possible to suffer heavier crop losses after pesticides are introduced than before ...
Harper, Carolyn R.
core