Related Experiment Video

Updated: Mar 6, 2026

Operant Conditioning Task to Measure Song Preference in Zebra Finches
06:40

Operant Conditioning Task to Measure Song Preference in Zebra Finches

Published on: December 26, 2019

7.0K

Interspecific competition between introduced house finch populations and two associated passerine species

J T Wootton1

  • 1Section of Ecology, Systematics and Evolution, Cornell University, 14853, Ithaca, NY, USA.

Oecologia
|March 18, 2017
PubMed

Keywords:
CarpodacusInterspecific competitionIntroduced finchesPasser

More Related Videos

A Push-pull Protocol to Reduce Colonization of Bird Nest Boxes by Honey Bees06:03

A Push-pull Protocol to Reduce Colonization of Bird Nest Boxes by Honey Bees

Published on: September 4, 2016

9.1K
Avian Semen Collection by Cloacal Massage and Isolation of DNA from Sperm07:40

Avian Semen Collection by Cloacal Massage and Isolation of DNA from Sperm

Published on: February 5, 2018

17.2K

Related Concept Videos

Conservation of Declining Populations02:07

Conservation of Declining Populations

Conservation of declining population focuses on ways of detecting, diagnosing, and halting a population decline. The approach uses methods to prevent populations from going extinct.
13.5K
Hybrid Zones02:29

Hybrid Zones

Hybrid zones are narrow regions where two closely related species interact, mate, and produce hybrids. Relative to either parent species, hybrids may possess distinct phenotypic or genetic differences that impact their survival and reproductive success. The genetic variances introduced by hybridization influence species diversity and speciation processes within the hybrid zone.
22.2K
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...
45.7K
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.
25.2K
Formation of Species01:31

Formation of Species

Speciation describes the formation of one or more new species from one or sometimes multiple original species. The resulting species are discrete from the parent species, and barriers to reproduction will typically exist. There are two primary mechanisms, speciation with and without geographic isolation—allopatric and sympatric speciation, respectively.
46.2K
Frequency-dependent Selection01:21

Frequency-dependent Selection

When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.
24.4K