Results 91 to 100 of about 18,413,602 (203)
The Anatomical Record, EarlyView.This work brings new information on the sexual characteristics of the crocodile shark (Pseudocarcharias kamoharai) exploring the pelvic fin musculature, as well as the siphon sac and the musculature and skeleton of the clasper. Our paper is the first to point out clearly the sexual dimorphism related exclusively to the pelvic fin musculature in males ...
Laura F. Mianutti +2 more
wiley +1 more source
Backward bifurcation of predator–prey model with anti-predator behaviors
Advances in Difference Equations, 2019 In this study, we consider a predator–prey model with stage structure and anti-predator behavior such that the adult prey can counterattack their predators. We first investigate the existence and stability of the equilibria.
Guangyao Tang, Wenjie Qin
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A Predator-Prey Model with an Application to Lake Victoria Fisheries [PDF]
Greater complexity in renewable resource models is achieved by acknowledging that species interact through a predator-prey relationship in which both species are harvested.
Berger, Brett +2 more
core
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
The 9+ month marathon: How pregnancy may have shaped human endurance capacities
The Anatomical Record, EarlyView.Abstract Anthropology has long considered the evolution of our uniquely human endurance capacities to be the result of selection upon anatomical and physiological features imposed by the demands of thermoregulation and resource acquisition, particularly during the demands of persistence hunting. Research has focused on the anatomical changes present in
Cara Ocobock
wiley +1 more source
The population status, breeding success and diet of Subantarctic Skuas two decades after the feral cat eradication on Marion Island [PDF]
, 2013 Prey availability is often the driver behind predator population trends, diet and breeding success. Changes in predator abundance and breeding success represent numerical responses to changes in prey abundance, whereas dietary shifts can be classified as
Cerfonteyn, Mia Elizabeth
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The Anatomical Record, EarlyView.Abstract Sharks possess varied diets and different prey capture mechanisms. As a result, the group exhibits a significant diversity in dental morphology, also reflecting the internal structures of the teeth. Internal dental anatomy points to the existence of three histotypes in elasmobranch phylogeny: orthodont, osteodont, and pseudoosteodont ...
Kelly Roberta da Silva +2 more
wiley +1 more source
Interaction strength and harvest intensity mediate predator–prey dynamics on coral reefs
EcosphereUnderstanding predator–prey relationships is fundamental to our knowledge of the stability and resilience of ecological systems. These dynamics are shaped by both ecological factors, like interaction strength, and anthropogenic factors, like harvest ...
Sophia A. Rahnke +3 more
doaj +1 more source
MathematicsIn this paper, we consider a general two-prey one-predator reaction–diffusion system with prey competition and double prey-taxis. We first present some preliminary results, including global-in-time existence and a priori estimates of classical solutions ...
Guoting Chen, Huan Dai, Mengfeng Sun
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A non-autonomous stochastic predator-prey model
, 2014 The aim of this paper is to consider a non-autonomous predator-prey system, with a Gompertz growth law for the prey. By introducing random variations in both prey birth and predator death rates, a stochastic model for the predator-prey system in a random
Enrica Pirozzi +7 more
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