Results 41 to 50 of about 143,183 (293)
PLoS ONE, 2015 Populations of the native ninespotted lady beetle, Coccinella novemnotata Herbst, have undergone precipitous declines in North America following the establishment of the exotic sevenspotted lady beetle, Coccinella septempunctata L.
Rakim Turnipseed +2 more
doaj +1 more source
Intraspecific competition, not predation, drives lizard tail loss on islands [PDF]
Journal of Animal Ecology, 2016 Summary Tail autotomy is mainly considered an antipredator mechanism. Theory suggests that predation pressure relaxes on islands, subsequently reducing autotomy rates. Intraspecific aggression, which may also cause tail loss, probably intensifies on islands due to the higher abundance.
Yuval Itescu +3 more
openaire +3 more sources
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 +2 more
wiley +1 more source
EcosphereForaging animals create nonrandom patterns of diversity and abundance within resource communities. Perceiving predation pressure and intraspecific competition for food resources, foragers can alter space use patterns, foraging intensity, and preference ...
Molly Gilmour +2 more
doaj +1 more source
The Anatomical Record, EarlyView.Abstract Differences in skull and tooth morphology, stomach contents, and estimated bite force between medium‐to‐large sized (≥100 kg) predatory theropod dinosaurs have long been suspected to correlate with differences in their diets and dietary guilds (e.g., hypercarnivory, piscivory).
Cassius Morrison +9 more
wiley +1 more source
It's all about food: Environmental factors cause species‐specific dispersal
Ecosphere, 2022 Dispersal is a vital component of the life history of nearly all organisms. The ability to disperse determines the distribution and abundance of a species and thus its community dynamic at different sites.
Bianca Kreuzinger‐Janik +3 more
doaj +1 more source
Predator cues reduce intraspecific trait variability in a marine dinoflagellate [PDF]
BMC Ecology, 2017 Phenotypic plasticity is commonplace and enables an organism to respond to variations in the environment. Plastic responses often modify a suite of traits and can be triggered by both abiotic and biotic changes. Here we analysed the plastic response towards a grazer of two genotypes of the marine dinoflagellate Alexandrium fundyense, evaluated the ...
Sylke Wohlrab, Erik Selander, U. John
openaire +2 more sources
Drivers of tail evolution in squamates and their implications for the fossorial origin of snakes
The Anatomical Record, EarlyView.Abstract The axial skeleton serves as the primary structural support in all vertebrates and is subdivided into five distinct regions: cervical, thoracic, lumbar, sacral, and caudal. Relaxation of constraints acting on the terminal end of the axial skeleton has led to remarkable variation in caudal vertebrae number across Squamata.
Olivia Binfield +2 more
wiley +1 more source
Trade-offs between the risks of predation and starvation in subtropical granivorous finches [PDF]
, 2007 Animal community structures, life histories and individual foraging behaviour are all an outcome of a trade-off between competition for resources (and thus the risk of starvation) and survival (and thus the risk of predation).
Brandt, Miriam J.
core +2 more sources
Observations on the intraspecific variation in tadpole morphology in natural ponds
Acta Herpetologica, 2017 Intraspecific morphological variation of anuran tadpoles occurs in response to several factors. Causes and consequences of this variation have been largely studied hitherto in controlled environments, but data from natural habitats is clearly less ...
Eudald Pujol-Buxó +3 more
doaj +1 more source