Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Competition02:34

Competition

25.2K
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.
25.2K
Predator-Prey Interactions02:39

Predator-Prey Interactions

22.0K
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.
22.0K
Types of Selection01:46

Types of Selection

45.7K
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...
45.7K
Testing a Claim about Mean: Unknown Population SD01:21

Testing a Claim about Mean: Unknown Population SD

6.4K
A complete procedure of testing a hypothesis about a population mean when the population standard deviation is unknown is explained here.
Estimating a population mean requires the samples to be approximately normally distributed. The data should be collected from the randomly selected samples having no sampling bias. There is no specific requirement for sample size. But if the sample size is less than 30, and we don't know the population standard deviation, a different approach is used;...
6.4K
Testing a Claim about Population Proportion01:24

Testing a Claim about Population Proportion

4.0K
A complete procedure for testing a claim about a population proportion is provided here.
There are two methods of testing a claim about a population proportion: (1) Using the sample proportion from the data where a binomial distribution is approximated to the normal distribution and (2) Using the binomial probabilities calculated from the data.
The first method uses normal distribution as an approximation to the binomial distribution. The requirements are as follows: sample size is large...
4.0K
Symbiosis00:58

Symbiosis

37.9K
Symbiotic relationships are long-term, close interactions between individuals of different species that affect the distribution and abundance of those species. When a relationship is beneficial to both species, this is called mutualism. When the relationship is beneficial to one species but neither beneficial nor harmful to the other species, this is called commensalism. When one organism is harmed to benefit another, the relationship is known as parasitism. These types of relationships often...
37.9K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same journal

Aphid honeydew reduces soil nitrogen and increases host plant growth.

Oecologia·2026
Same journal

Large fish eggs may lose their edge as temperature rises.

Oecologia·2026
Same journal

Secondary consumption of mycorrhizal fungi by two endangered marsupial carnivores: the spotted-tailed quoll (Dasyurus maculatus) and Tasmanian devil (Sarcophilus harrisii).

Oecologia·2026
Same journal

Unveiling the microhabitat puzzle: how spatial heterogeneity shapes cave invertebrate biodiversity across scales.

Oecologia·2026
Same journal

Soil microbial drought history affects physiological response of select tree species to drought stress.

Oecologia·2026
Same journal

Unveiling the effects of interspecific competition: ecological consequences of competitive release after damming on Salvelinus curilus populations in a three-salmonid species coexistence system.

Oecologia·2026

Related Experiment Video

Updated: Mar 6, 2026

Manipulation of Color Patterns in Jumping Spiders for Use in Behavioral Experiments
09:03

Manipulation of Color Patterns in Jumping Spiders for Use in Behavioral Experiments

Published on: May 21, 2019

10.1K

Evidence for asymmetrical intraguild predation between native and introduced Anolis lizards.

G P Gerber1, A C Echternacht1

  • 1Department of Ecology and Evolutionary Biology, University of Tennessee, Knoxville, TN 37996-1610, USA, , , , , , US.

Oecologia
|March 18, 2017
PubMed
Summary

Introduced brown anoles (Anolis sagrei) prey more on native juvenile anoles than on their own young. This invasive species shows a higher predation rate on other anole species, impacting native populations.

Keywords:
CannibalismKey words Invasive speciesLizardsSize-structured populationsSpecies discrimination

More Related Videos

Collecting Marine Gnathiid Isopod Fish Parasites with Light Traps
06:43

Collecting Marine Gnathiid Isopod Fish Parasites with Light Traps

Published on: September 25, 2023

1.9K
Visually Sexing Loggerhead Shrike Lanius Ludovicianus Using Plumage Coloration and Pattern
04:10

Visually Sexing Loggerhead Shrike Lanius Ludovicianus Using Plumage Coloration and Pattern

Published on: March 8, 2020

6.6K

Related Experiment Videos

Last Updated: Mar 6, 2026

Manipulation of Color Patterns in Jumping Spiders for Use in Behavioral Experiments
09:03

Manipulation of Color Patterns in Jumping Spiders for Use in Behavioral Experiments

Published on: May 21, 2019

10.1K
Collecting Marine Gnathiid Isopod Fish Parasites with Light Traps
06:43

Collecting Marine Gnathiid Isopod Fish Parasites with Light Traps

Published on: September 25, 2023

1.9K
Visually Sexing Loggerhead Shrike Lanius Ludovicianus Using Plumage Coloration and Pattern
04:10

Visually Sexing Loggerhead Shrike Lanius Ludovicianus Using Plumage Coloration and Pattern

Published on: March 8, 2020

6.6K

Area of Science:

  • Ecology
  • Invasive Species Biology
  • Herpetology

Background:

  • The invasive brown anole (Anolis sagrei) is displacing native anole species, such as Anolis carolinensis in Florida and Anolis conspersus in Grand Cayman.
  • Urban and open habitats are particularly affected by this displacement, raising concerns about ecological interactions.
  • Intraguild predation, where species within the same functional group prey on each other, is a key interaction to consider.

Purpose of the Study:

  • To evaluate the potential role of predation by adult Anolis sagrei on juvenile native anoles in the displacement process.
  • To compare the intraguild predation and cannibalism propensities of Anolis sagrei against native anoles (A. carolinensis and A. conspersus).

Main Methods:

  • Predation experiments were conducted in controlled cage environments using recently captured lizards.
  • Adult males of Anolis sagrei, Anolis carolinensis, and Anolis conspersus were presented with both conspecific (own species) and heterospecific (other species) juveniles.
  • The frequency of predation events was recorded and analyzed statistically.

Main Results:

  • Adult Anolis sagrei exhibited a significantly higher propensity to consume juveniles compared to adult Anolis carolinensis and Anolis conspersus.
  • Anolis sagrei adults were significantly more likely to prey on heterospecific juveniles than on conspecific juveniles.
  • Native anoles (A. carolinensis and A. conspersus) did not show a significant preference for preying on heterospecific juveniles over conspecific ones.

Conclusions:

  • The propensity for intraguild predation is asymmetrical, strongly favoring the invasive Anolis sagrei in both Florida and Grand Cayman.
  • This suggests that predation by invasive Anolis sagrei on native juvenile anoles may be a significant factor contributing to native species displacement.
  • Further research is required to ascertain the ecological significance of this intraguild predation under natural field conditions.