Results 31 to 40 of about 7,092 (254)

Cannibalism in Tityus metuendus Pocock, 1897 (Scorpiones: Buthidae) from the Brazilian Amazon

Revista Chilena de Entomología
Scorpions are an important predator group in the habitats where they live, due to their voracity. However, their predatory habits are not well recorded, particularly in Amazonian species.
Jonas G. Martins, Marllus R. N. Almeida, Rudi E. L. Procópio, André F. A. Lira   +3 more
doaj   +1 more source

Age-Dependent Utilization of Shelters and Habitat in Two Reptile Species with Contrasting Intraspecific Interactions

Animals, 2019
Reptiles undergo worldwide decline driven mostly by habitat change. Detailed recognition of factors underlying spatial structure and habitat utilization is therefore a prerequisite of effective conservation of this group.
Aleksandra Kolanek, Stanisław Bury, Edyta Turniak, Mariusz Szymanowski   +3 more
doaj   +1 more source

Voltinism and larval growth pattern in Coenagrion mercuriale (Odonata: Coenagrionidae) at its northern range margin

European Journal of Entomology, 2002
Voltinism and larval growth pattern were investigated in an edge-of-range population of Coenagrion mercuriale. Coenagrion mercuriale is semi-voltine in Britain and growth is inhibited in winter.
Bethan V. PURSE, David J. THOMPSON
doaj   +1 more source

Variation in wing morphology is related to breeding environment in a high‐elevation specialist bird

Journal of Avian Biology, 2022
The morphology of bird wings is subject to a variety of selective pressures, including migration, predation, habitat structure and sexual selection.
Francesco Ceresa, Severino Vitulano, Michele Pes, Laura Tomasi, Mattia Brambilla, Laura Kvist, Paolo Pedrini, Matteo Anderle, Andreas Hilpold, Petra Kranebitter   +9 more
doaj   +1 more source

Endothermy, neuron counts, and other issues: Further remarks on neurocognitive evolution in fossil vertebrates

The Anatomical Record, EarlyView.
Abstract Last year, we challenged the view that large‐bodied theropod dinosaurs such as Tyrannosaurus rex resembled primates in cognition and behavior, a proposition made by Herculano‐Houzel in 2023. More recently, Jensen et al. have criticized our work on this topic, raising methodological and conceptual issues.
Kai R. Caspar, Cristián Gutiérrez‐Ibáñez, Hady George, Thomas R. Holtz Jr., Darren Naish, Grant R. Hurlburt   +5 more
wiley   +1 more source

Egg Predation by the Introduced Lady Beetle, Coccinella septempunctata (Coleoptera: Coccinellidae), Lowers Mortality but Raises Relative Risk for the Native Lady Beetle, Coccinella novemnotata.

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, Todd A Ugine, John E Losey   +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, Rachel Schwarz, Shai Meiri, Panayiotis Pafilis   +3 more
openaire   +3 more sources

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

Impacts across levels: Resource biodiversity is affected by predation and competition pressure on the forager level

Ecosphere
Foraging 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, Filippa Erixon, Jana Eccard   +2 more
doaj   +1 more source

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