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Related Concept Videos

Predator-Prey Interactions02:39

Predator-Prey Interactions

Predators consume prey for energy. Predators that acquire prey and prey that avoid predation both increase their chances of survival and reproduction (i.e., fitness). Routine predator-prey interactions elicit mutual adaptations that improve predator offenses, such as claws, teeth, and speed, as well as prey defenses, including crypsis, aposematism, and mimicry. Thus, predator-prey interactions resemble an evolutionary arms race.Although predation is commonly associated with carnivory, for...
Competition02:34

Competition

When organisms require the same limited resources within an environment, they may have to compete for them. Competition is a net-negative interaction. Even if two competing individuals or populations do not interact directly, the overall fitness of both competitors is lowered as a result of not having full access to the limited resource.Intraspecific competition, which occurs between individuals of the same species, serves as a natural mechanism for regulating population size. Too much...
Optimal Foraging00:48

Optimal Foraging

How animals obtain and eat their food is called foraging behavior. Foraging can include searching for plants and hunting for prey and depends on the species and environment.
Types of Selection01:46

Types of Selection

Natural selection influences the frequencies of particular alleles and phenotypes within populations in several different ways. Primarily, natural selection can be directional, stabilizing, or disruptive. Directional selection favors one extreme trait and shifts the population towards that phenotype while selecting against individuals displaying alternate traits. Stabilizing selection favors an intermediate trait with a narrow range of variation. Deviation from the optimal phenotype towards an...
Microbial Interactions: Competition01:26

Microbial Interactions: Competition

Microbial competition is an ecological interaction in which microorganisms vie for limited resources within shared environments. These resources may include nutrients, space, or light, depending on the system. The intensity and outcome of competition are influenced by the environmental context, such as nutrient availability, spatial constraints, and the diversity of microbial species present. These competitive interactions significantly influence the structure, function, and resilience of...
Microbial Interactions: Predation01:28

Microbial Interactions: Predation

Microbial predation refers to the process by which one microorganism kills and consumes another to obtain nutrients and energy. It encompasses both bacterial and protozoan predators. This interaction plays a crucial role in shaping microbial communities and regulating nutrient cycling.Bacterial Predators: Epibiotic vs. EndobioticBacterial predators are classified based on their mode of attack as either epibiotic or endobiotic. Epibiotic predators, such as Vampirococcus, attach to the surface of...

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Related Experiment Video

Updated: Jul 4, 2026

A Real-Time Interactive System for Studying Confrontational Pursuit Behavior in Rodents
06:25

A Real-Time Interactive System for Studying Confrontational Pursuit Behavior in Rodents

Published on: May 16, 2025

Discrete-time exploitative competition model of different stage-specific predators.

Hiromi Seno1, Akshat Goyal2

  • 1Department of Computer and Mathematical Sciences, Graduate School of Information Sciences, Tohoku University, Sendai, 980-8579, Miyagi, Japan. seno.math.is@tohoku.ac.jp.

Journal of Mathematical Biology
|July 3, 2026
PubMed
Summary

Alien predators can invade native prey-predator systems. Native systems with adult-specific predators are more vulnerable to juvenile-specific alien predators than vice-versa.

Keywords:
Beverton-Holt modelDiscrete-time modelExploitative competitionNicholson-Bailey modelPrey-predator systemStage-specific predation

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Assaying Predatory Feeding Behaviors in Pristionchus and Other Nematodes
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Assaying Predatory Feeding Behaviors in Pristionchus and Other Nematodes

Published on: September 4, 2016

Related Experiment Videos

Last Updated: Jul 4, 2026

A Real-Time Interactive System for Studying Confrontational Pursuit Behavior in Rodents
06:25

A Real-Time Interactive System for Studying Confrontational Pursuit Behavior in Rodents

Published on: May 16, 2025

Assaying Predatory Feeding Behaviors in Pristionchus and Other Nematodes
06:27

Assaying Predatory Feeding Behaviors in Pristionchus and Other Nematodes

Published on: September 4, 2016

Area of Science:

  • Ecology
  • Mathematical Biology
  • Population Dynamics

Background:

  • Competition models are crucial for understanding ecological dynamics.
  • Predator-prey interactions are complex, especially with native and alien species.
  • Stage-specific predation introduces unique invasion dynamics.

Purpose of the Study:

  • To analyze the invadability of native prey-predator systems by alien predators.
  • To determine which stage-specific alien predator is more successful in invasion.
  • To compare the vulnerability of native systems based on predator stage specificity.

Main Methods:

  • Developed a discrete-time competition model using three recurrence relations.
  • Incorporated generic density-dependent effects for prey.
  • Utilized generic predation factors for native and alien predators.

Main Results:

  • Mathematical analysis revealed differential vulnerability based on predator stage.
  • Native systems with adult-specific predators are more susceptible to juvenile-specific alien predators.
  • A specific model (Beverton-Holt and Nicholson-Bailey) illustrated these findings.

Conclusions:

  • Stage-specific predation significantly influences invasion success.
  • The vulnerability of a native system depends on the predator-prey stage interactions.
  • Understanding these dynamics is key for ecological management and conservation.